Upstaff Developer Profile Directory

All vetted software engineers you need to build AI, Web3, and data Products.
  • Dedicated Full-time commitment for long-term or Time& Material for shorter or ongoing support
  • Europe, Israel, LatAm, United States, Asia geography coverage
  • Remote and hybrid engagement
  • Trial period, no termination fees or hidden costs for transparent and risk-free onboarding.
JavaScript 3yr.
React 3yr.
Node.js 3yr.
TypeScript 2yr.
Angular 2yr.
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Software engineer with 3 years of front-end development experience, adept in JavaScript, TypeScript, React, Redux, Next.js, Angular, and strong back-end knowledge including Node.js, Express.js, PostgreSQL, and MongoDB. Demonstrated ability in working with modern dev tools like Docker, nginx, and Git. Key projects include development of Automated Information Systems (AIS) and upgrading safety certification systems. Proven expertise in integrating digital signature technologies like Rutoken Plugin and JaCarta PKI. Holds a Bachelor's in Applied Informatics and pursuing a Master's in Green Industrial Engineering, indicative of a solid technical education. Excels in Agile methodologies and proficient with several UI libraries/frameworks.
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Facebook Ads API
Google Ads
Adobe LiveCycle
Telegram
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- Seasoned in using a variety of PPC and offline tools: paid traffic, social media, CPA-marketing, email- push- in-app communication, content marketing, PR and event, SMMand SERM - Led Data-Driven Marketing Efforts, utilizing analytics to guide strategic decisions, monitor KPIs, and achieve business objectives. BI analytical tools such as MS PowerBI. - Managed company content plan for variety of social media and other content activities, content writers and in-house designers - Digital Marketing Technologies, proficient in using Google Ads, LinkedIn, SEO, and various analytics tools including Google Analytics, Firebase Analytics, and Kissmetrics, MS Excel. - Managed Advanced Marketing Tools such as Affiliate Marketing platforms, SMM tools, SERM, Mailchimp, Ahrefs, Similarweb, and SpyFu to drive marketing strategy and operations. - Extensive experience in international projects as CMO, worked on user acquisition from Asia, LATAM and Europe for gambling products. - Affiliate partnership (retention and new affiliate acquisitions) - Handled SEO Optimization and Website Development across multiple roles, enhancing online presence and optimizing user engagement and conversion rates.
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Senior
Kyiv, Ukraine
Java
Spring Boot
Hibernate
PostgreSQL
Docker
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- Senior Software Engineer with 8+ years of experience; - Expertise in Java, Kotlin, Spring Boot, Hibernate, and Micronaut for cloud-based microservices; - Strong background in AWS, GCP, Kubernetes, and event-driven architecture; - Led monolithic to microservices migrations and real-time data processing solutions; - Skilled in database management with PostgreSQL, MySQL, Oracle, and TimescaleDB; - Experience with Kafka, RabbitMQ, and Elasticsearch for scalable data processing; - Ability to design financial and banking software solutions; - Hands-on experience with CI/CD pipelines, Docker, Helm, and GitLab CI.
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Expert
Singapore
Project Management 5yr.
MS SQL Server Management Studio 5yr.
Unreal Engine 4yr.
DigitalOcean 4yr.
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Software Engineer with 4 years of experience specializing in high-volume business code development and project management. Expertise in SEO integration, digital marketing, and Web3 community management with a strong background in using project management platforms and community moderation tools. Holds certifications in Community Management, Project Management, Digital Marketing, and Web3 management. Recognized for leading Web3 community initiatives, improving follower retention by 20% with analytical protocol enhancements. Technical skills include Project Management (5 years), Unreal Engine, DigitalOcean, and MS SQL Server Management Studio (each 4 years), along with proficiency in iOS Core Graphics and CSP.
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Middle
Manchester, United Kingdom
iOS
Android
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Hello, my name is Hashir, and I am a mobile app developer with 5 years of experience in both iOS and Android app development. Over the years, I have honed my skills in developing high-quality mobile applications that are user-friendly, efficient, and visually appealing.As a mobile app developer, I specialize in a wide range of technologies such as React Native, Android Studio, and Swift. My knowledge in these technologies enables me to design and implement custom mobile applications that meet the unique needs of each client.Throughout my career, I have gained valuable experience in all aspects of the mobile app development process, from concept to launch. I have a deep understanding of both the design and development aspects of creating a mobile application, which allows me to provide clients with comprehensive solutions.I am also passionate about staying up-to-date with the latest trends and advancements in mobile app development. This passion drives me to continuously seek out new skills and knowledge, which enables me to develop innovative and efficient solutions that exceed my clients' expectations.In summary, I am a dedicated and skilled mobile app developer with a passion for creating high-quality, user-friendly applications.
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Java
AWS
Docker
Kubernetes
Spring Boot
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- Java Software Engineer with 7+ years of experience in web services and backend development; - Expertise in Java, Spring Boot, Hibernate, and microservices architecture; - Skilled in containerization with Docker and orchestration with Kubernetes; - Experienced in CI/CD, test automation, and performance optimization; - Experienced in high-load systems, multithreading, and asynchronous processing; - Strong background in AWS (Lambda, S3, Scaling, Redshift) and cloud-based solutions; - Experience in database management with PostgreSQL, MySQL, MongoDB, and Cassandra; - Integrated payment systems such as PayPal, Stripe, and Coingate.
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Go 6yr.
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- Experienced Golang Engineer – 6+ years in Golang development, working on distributed systems, cloud-native architectures, and microservices. - Cloud & DevOps Expertise – Proficient in AWS, Kubernetes, Docker, CI/CD (GitHub Actions, Terraform, Ansible), and monitoring tools (Datadog, Prometheus). - Data Engineering & Pipelines – Built ETL workflows, API integrations, and real-time data pipelines using Kafka, SQS, and Postgres. - Backend Development in Go & Python – Experience with FastAPI, Flask, GraphQL, REST APIs, and implementing secure authentication (JWT, OAuth). - Leadership & Mentorship – Led backend teams, defined scalable architectures, set up on-call rotations, and mentored engineers. - Full-Stack Collaboration – Worked with ReactJS, NextJS, VueJS, integrating Golang and Python backends for seamless applications. -Fluent English
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Senior
United Kingdom
WordPress 3yr.
Elementor 2yr.
Wix
WooCommerce API
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Senior Web Developer with extensive experience in WordPress, WIX, and e-commerce system development. Proficient in converting designs (Figma) to functional WordPress sites and optimizing websites for SEO and usability. Demonstrated expertise in front-end development, including HTML, CSS, and JavaScript, coupled with a deep understanding of Elementor and WooCommerce. Proven track record in delivering web projects across various industries, with a focus on enhancing user experience and meeting business requirements.
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MS Dynamics 365
Microsoft Power Platform
C#
.NET
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- Extensive experience developing, customizing, and integrating CRM systems across various industries using MS Dynamics 365, Power Apps, and Azure. - Proficient in a wide range of technologies, including .NET, C#, JavaScript, SQL, Entity Framework, Azure Functions, Azure Logic Apps, Angular, React, and various CRM and cloud platforms. - Skilled in deploying and managing Azure infrastructure, including developing Azure Functions and integrating them into cloud-based solutions. - Pending March 2025 Certifications: Power Platform Developer Associate
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Senior
Lviv, Ukraine
Python
Data Science
SQL
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Expertise in Python, SQL, and ML web applications with a focus on practical applications in fields like AI and computer vision. Proven track record in AI with projects at DeepLogic AI, including creating an ML Web app for classifying blastocyst embryos and implementing LLM for in-house document processing. Further experience includes feature extraction via PySpark at Tata Digital, and exploiting BERT for NLP tasks at Concentrix. Academically grounded with a Master's in CS from Columbia University and a BTech in Math/CS from Delhi University. Holds AWS accreditations, demonstrating proficiency in cloud architectures, EC2, S3, and RDS. Skilled in end-to-end software development, including full-stack abilities shown at Datacultr with Django and PostgreSQL.
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Intern
New York, United States
QA Automation 6yr.
Salesforce 6yr.
Sales Cloud 6yr.
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QA Engineer with over 6 years of experience in Salesforce platform testing, including Sales Cloud and Service Cloud. Certified Salesforce Administrator with a B.E. in Computer Science, showcasing a solid foundation in technical principles and software development practices. Skilled in automating QA processes, accomplishing a 30% efficiency improvement through test automation frameworks like Selenium and Cucumber. Strong in functional, performance, and regression testing with tools like JMeter and proficiency in defect tracking using JIRA and Bugzilla. Holds a track record of effective collaboration with cross-functional teams to ensure product quality in line with PRDs and user stories.
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Kubernetes
Docker
Linux
GCP BigQuery
AWS
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Senior DevOps Engineer with 6+ years of experience designing and implementing scalable, secure infrastructure for data-driven platforms: * Expertise in Azure DevOps, Azure Kubernetes Service (AKS), and Azure KeyVault, delivering robust CI/CD pipelines and efficient cloud-based solutions. * Led full DevOps lifecycle for complex enterprise projects, including microservices architectures, logging/monitoring solutions (Prometheus, Grafana, ELK), and resource optimization across Azure, AWS, and GCP. * Deployed and maintained high-availability infrastructure for AI, analytics, and cross-platform applications, ensuring uptime and operational excellence. * Master’s Degree in System Engineering with deep technical knowledge of Windows, Linux, and MacOS platforms.
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Expert
Kharkiv, Ukraine
Go 14yr.
React
JavaScript
PostgreSQL
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- Certified Senior Go Engineer ( 12 years with Go, 19 years in Software Engineering) with experience in software engineer, team lead and software architect roles. - Master’s Degree in Computer Science - Designed and implemented a scalable multi-microservice backend for an enterprise AdTech CRM, integrating 10+ third-party services and streamlining client management operations. - Built and deployed a billing system for a money exchange platform, integrating third-party payment systems and delivering a user-friendly web interface for seamless transactions. - Optimized data processing pipelines by implementing quantiles on streams, enabling real-time analytics and supporting large-scale data operations for scientists and business stakeholders. - Extensive background in data processing and reporting.
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Expert
Kharkiv, Ukraine
Go
PHP
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- Back-end Software Engineer with 12+ years in the IT industry as a back-end engineer - Excellent knowledge of different databases and a good level of understanding of complex systems with lots of dependencies. - 5+ years of recent commercial experience with Go - Has experience with leading the team of up to 30 engineers, - Experience mentoring on Codementor, StackOverflow, and teaching - Upper-Intermediate English
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Senior
Portugal
Python
JavaScript
TypeScript
Go
Django REST framework
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Software Engineer with a comprehensive Computer Science education and 9 years of experience in Fin-tech, E-Commerce, and Investment domains. Technical proficiencies include Python, JavaScript, TypeScript, and Go, with notable expertise in backend frameworks like Django and Flask, and data engineering tools such as Apache Spark and Airflow. Experienced in cloud environments, particularly Azure and AWS, providing scalable data processing solutions. Strong DevOps skill set with Docker, Kubernetes, and CI/CD implementation ensuring robust deployments. Proven track record in projects that demand seamless backend development, efficient data pipeline construction, and cloud infrastructure automation.
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Python 9yr.
Django REST framework 6yr.
FastAPI 3yr.
Flask 3yr.
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Versatile Software Engineer with 9 years of experience, bringing a strong background in computer science, particularly in backend development, data processing, and cloud services. Specialized in Python and proficient with frameworks like FastAPI, Django, and Flask. Has engineered complex ETL pipelines, optimized databases including PostgreSQL and Redis, and implemented cloud solutions using AWS and Azure. Excelled in DevOps practices with tools such as Docker, Kubernetes, and Terraform. Demonstrated capability in building scalable, secure applications and services, evidenced by successful project delivery in domains such as e-commerce, human resources, and cybersecurity. With hands-on experience in Stripe payment systems and expertise in system integration, this candidate is equipped to tackle challenging roles in the tech industry.
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AWS CloudTrail
Azure
GCP
Kafka
Atlassian Confluence
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The engineer boasts a robust technical background with 8 years of DevOps expertise, underpinned by a Computer Science and Software Engineering education, and a proficiency in English at B2 level. With a comprehensive mastery of cloud platforms including AWS, Azure, and GCP, the engineer has demonstrated advanced skills in infrastructure automation using Terraform, Ansible, and Kubernetes. Additionally, they hold a suite of certifications that include Azure Fundamentals, Administrator Associate, DevOps Engineer Expert, and Solutions Architect Expert from Microsoft. The engineer's project experience showcases a strong command of CI/CD processes, using tools like Azure DevOps and GitLab CI, and a deep understanding of containerization with Docker. They are also proficient in data engineering tools such as Kafka and experienced in monitoring and logging with solutions like Zabbix and Grafana. This amalgamation of hands-on project roles and technical acumen positions them as an exceptional candidate for complex, multi-cloud DevOps engineering roles.
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Rasa
Django
...
As a passionate AI developer with a strong command over machine learning, data analytics tools, deep learning, Django, Flask, SQL, data extraction, and web automation, I have gained valuable experience through various roles. I have worked as a data analyst on contracts with an Indian MNC, making significant contributions. Additionally, I played a key role in a ship maintenance-based startup by providing a corrosion segmentation solution. Moreover, I have worked on RAG techniques and implemented personalised chatbot features using LLMs like ChatGPT using LangChain technology. I have successfully provided customers more than a million units of required data by implementing efficient data extraction methods.
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C++ 7yr.
CMake 5yr.
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- Software Engineer with over 7+ years of experience designing and delivering robust software solutions across diverse industries, including manufacturing automation, robotics, audio processing, UAV control, and communication systems. - Proficient in C++ (C++11, C++17, C++20) with a proven track record in developing both backend and frontend systems using React Native, Qt (QML, Qt Widgets), and PHP-CPP. - Skilled in creating high-performance multithreaded servers, implementing WebSocket protocols, and integrating cutting-edge technologies such as io_uring and advanced signal processing algorithms. - Demonstrated expertise in deploying solutions for real-time audio processing, cloud-based parking systems, and 3D modeling of industrial components. - Experienced in robotics and sensor integrations (Riftek, Nanotec, Rozum, Basler SDKs) for automating precision tasks in manufacturing. - Adept in database management (MySQL), DevOps (Docker, Bazel, Git), and cross-platform development on Linux, Windows, Android, and iOS.
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C/C++/C#
ASP.NET MVC
ASP.NET Core Framework
RESTful API
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Accomplished Software Engineer with 5.2 years of experience specializing in the hospitality industry, holding a MCA degree with a high aggregate. Expert in Microsoft technologies, particularly in C#.NET, ASP.NET MVC, and Core, with a track record of implementing successful hotel reservation and marketplace systems. Proficient in Agile and Scrum methodologies, with an aptitude for problem-solving and a commitment to delivering efficient, high-quality software solutions. Key achievements include a 30% reduction in transaction failures through secure payment integrations and a 50% increase in online bookings via a user-friendly customer portal. Skilled in modern development practices and bringing strong expertise in cloud computing with Azure, demonstrated through leadership roles in several high-profile projects at Cyber Infrastructure. Recognized for technical skills in full-stack development, SQL databases, and internet technologies, ensuring that applications meet the complex demands of today’s digital landscape.
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Python 7yr.
Django 4yr.
Flask
Celery
Redis
...
A highly skilled Software Developer with extensive expertise in Python, backed by 7 years of diverse experience in web development, server engineering, and automation. Renowned for building scalable microservices and upgrading applications to Python 3.12. Demonstrates a solid grasp of Django, Flask, Celery, Redis, Docker, MySQL, Linux, and modern frontend technologies like React. Proven ability as a lead developer, creating robust SEO tools and web applications, with a penchant for automating processes and integrating various APIs. Holds a strong background in both application development and teaching, blending technical acumen with a solid understanding of the software development lifecycle.
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Senior
Tirana, Albania
SharePoint 9yr.
Power Apps 3yr.
Microsoft Power Platform 3yr.
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- 9+ years commercial projects in IT. Experience with the full lifecycle of designing, developing, installing, configuring, and maintaining applications on SharePoint 2010/2013/2016/2019/ Online - Power Platform: Power Apps, Power Automate, Power BI, Dataverse, MS Visual Studio 2015/2017/2019, VS Code - HTML (HTML5), JavaScript, CSS (CSS3), CSS Frameworks (Bootstrap 3/4, Semantic UI, Office UI Fabric, Metro UI) - Experience with JQuery, DataTables, Vue.js, ReactJS, SPFx, Project Server 2016, PowerShell, PnP, Azure DevOps, MS Project, MS Teams, Jira, Git, Slack
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Senior
Lithuania
Node.js 8yr.
Web3.js 4yr.
Solana 2yr.
EthereumJS 2yr.
React
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- Full-Stack Engineer with over 8 years of experience specializing in Web2 and Web3 technologies, blockchain development, and Full-Stack architecture. - Has 4 years of experience working with web3, implementing blockchain solutions using Ethereum, Solana, and smart contracts. - Proven expertise in tokenization, NFT integration, and cryptocurrency transactions for real estate, voluntary donation, and other industries. - Expertise in Node JS, Nest JS, and RESTful APIs, with proficiency in React JS for frontend development. - Strong experience with databases like PostgreSQL, Redis, MongoDB, and DynamoDB. - Well-versed in cloud services, including AWS and GCP, and experienced in container orchestration with Kubernetes. - Proficient in CI/CD using Jenkins, GitHub Actions, Bitbucket Pipelines, and Terraform. - Familiar with Nginx for web server management and ensuring smooth application deployments.
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Senior
Warsaw, Poland
Rust 2yr.
Solidity
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- Engineer who has 6+ years of experience with many programming languages, frameworks, and platforms; - 2+ years experience with developing smart contracts on Rust; - Solid skills with Solidity; - Working experience in building an NFT marketplace platform on Polygon and Binance Smart Chain using ERC-721 and ERC-1155; - Experience with ether.js, web3.js, and JS/TS frameworks; - Familiar with blockchain Ethereum, Binance, Tron, Solana, Polkadot, Tezos, Polygon, Huobi ECO chain, etc; - Deep knowledge in implemented Metamask, Torus, and other wallets to increase user experiences with the web apps; - Advanced English; - Available ASAP.
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Senior
Singapore
Project Management
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International marketing manager with strong communication skills in 4 languages and project management experience, certified by Hubspot.
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Java 17yr.
Go 9yr.
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- A backend developer with over 18+ years of experience in software engineering and more than 9 years of experience with Golang. - Extensive experience designing and developing Go-based microservices for highly scalable and distributed systems. - Skilled in leveraging Go’s concurrency model (goroutines, channels) for building efficient and performant systems. - Proficient in developing REST, gRPC, and GraphQL APIs using Go. - Expertise in deploying Go applications in containerized environments using Docker and orchestrating them with Kubernetes and Knative. - Experience with building serverless solutions on AWS Lambda and integrating Go services with various AWS resources (S3, RDS, ElasticCache). - Automated infrastructure provisioning for Go applications using Terraform and AWS CloudFormation. - Proficient in designing and implementing scalable REST, GraphQL, and gRPC APIs. - Expertise in object-oriented design (OOD), test-driven development (TDD), and domain-driven design (DDD). - Hands-on with frontend technologies like Angular, JavaScript, jQuery, and Dojo for building user interfaces.
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Expert
Bulgaria
Reltio 9yr.
Spring Boot
Databricks
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- Certified Reltio technical consultant with over 9 years of strong experience in Master Data Management (MDM), specialized in Reltio MDM and Java. - Extensive experience in designing, architecting and implementing MDM solution using Reltio. - Designed and developed data ingestion, data quality, publish module, multiple data quality reports and custom utilities to support business requirements. - Have worked in different module of Reltio like Data Modeler, UI Modeler, Data Loader, Data Export, External Match and Reference Data Management (RDM) - Highly experienced in working with Reltio APIs, Postman and develop Java utilities using Reltio API to meet business custom requirements, automation and bug fixes. - Have experience in configuring Reltio entity, match and survivorship rules, validation rules. - Hands on experience in application development using Spring Boot, Sprint Data JPA, Mircoservice. - Have working knowledge of SQL and experience in data analysis and data profiling. - Was deeply involved in tasks like requirements gathering, code development, testing, deployment and operational support activities.
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Senior
Pune, India
SAP CPI 5yr.
Java
Spring Boot
SAP
Fiori
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With over 15 years of experience in the IT industry, this software engineer has an extensive background in creating innovative solutions using SAP technologies. They have a proven track record of over ten full SAP implementations across various industries and countries, constantly applying best practices and innovation. Deeply skilled in a range of SAP products such as SAP CPI, SAP CAMP, Fiori, ABAP, S/4HANA, and SuccessFactors, they have also demonstrated expertise in Java, Node.js, and Python development. They are versed in logistics and finance functional domains, holding a strong foundation with a BACHELOR's degree in IT. This engineer has shown leadership in guiding teams and managing complex projects, excelling in creating secure and effective solutions that optimize workflow and enhance business processes.
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FDD
Data Scraping
SDLC
Cleaning Data
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Software engineer with a robust track record in CRM development, specializing in marketing automation and data cleaning. Proficient in No Code & Low Code solutions, leveraging tools like Zapier and Make to enhance workflow efficiency. Demonstrated expertise in AI and machine learning, with hands-on experience in Python-based technologies such as TensorFlow and Keras. Key accomplishments include leading digital transformation initiatives and optimizing business processes. The engineer's technical skill set spans HTML5, CSS3, SQL, and Python, underpinned by a formal education in Audio Production and an incomplete BSc in Computer Science. Strong foundation in SDLC, REST API management, and performance monitoring that spans several years, exhibiting a talent for tech solutions that drive business growth.
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Middle
Torino, Italy
Vue.js 5yr.
JavaScript 5yr.
ASP.NET MVC 5yr.
C# 5yr.
AWS ElasticSearch
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With a robust professional background as a .NET Full Stack Developer, Engineer has established a noteworthy record since December 2019. Specializing in Vue.js, ASP.NET MVC, C#, and JavaScript, the engineer displays adeptness in both frontend and backend development. Proven capacities lie in intricate system components such as RBAC implementations, API management, and Elasticsearch queries alongside advanced JWT authentication patterns. Commitment to best practices is reflected through meticulous optimization of CRM platforms, demonstrating technical agility by harmonizing newer Vue.js versions with established .NET frameworks. Transitioning from legacy systems to modern technological solutions, the engineer has effectively scaled system stability and performance, validating a comprehensive skill set aligned with progressive software development paradigms.
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RPA 3yr.
Power Automate 2yr.
Visual Basic .NET
ASP.NET MVC
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Software engineer with 3+ years of experience specializing in RPA development across various sectors like E-Commerce, Healthcare, Finance, and Banking. Holds expertise in complete SDLC & RPA lifecycle management, including bot development with Power Automate, UiPath, and the Power Platform suite. Architectural and end-to-end implementation proficiency complemented by strong analytical skills and a track record of delivering high-quality solutions that align with client requirements. Notable achievements include client and business team appreciations for exceptional support and project deliverables. Holds a Master's in Information Systems and several certifications, including PL 900 and PL 500.
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Middle
United States
HubSpot 9yr.
NFT marketplace 5yr.
Hubspot API
Google Ads
Google Analytics
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The candidate is an accomplished CRM Specialist with extensive experience in marketing and sales process optimization, primarily utilizing Hubspot CRM tool. Expertise encompasses implementation of CRM systems across numerous countries, driving marketing automation and analyzing KPIs to improve marketing strategies. Skills include inbound marketing, Google AdWords, Google Analytics, and social media advertising on platforms such as Facebook and LinkedIn. Well-versed in various online marketing tools and integrations, the specialist has a proven track record in lead generation strategy, brand development, and revenue management. Recognized for strong background in digital marketing project strategy, this professional facilitates effective team collaboration for project success.
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