Hire Vetted Web Application Engineers at Upstaff - Page 20

- 15+ years of experience as a Software Engineer, specializing in Java, microservices, and system design for backend development; - Expertise in developing and maintaining scalable web applications and microservices with a focus on performance optimization; - Strong experience in building applications using Spring Boot, Kafka, Docker, and RESTful API design; - Proficient in integrating third-party APIs and cloud-based solutions, with a strong background in Azure and AWS platforms; - Extensive experience with SQL (PostgreSQL, Oracle DB) and NoSQL (MongoDB) databases; - Familiar with CI/CD pipelines, using Jenkins, GitHub Actions, and AWS SDK for continuous integration and deployment; - In-depth knowledge of Agile methodologies, contributing to sprint planning, code reviews, and project delivery in international teams; - Experience in unit testing, integration testing, and ensuring high code quality with tools such as JUnit and RestAssured; - Worked on high-stakes projects in the finance, telecom, healthcare, and insurance industries, delivering critical software solutions; - Strong leadership and mentoring experience, managing development teams and delivering successful projects.

A seasoned Fullstack Golang Developer with over 5 years of specialized experience in Golang, and a broader 9 years with Node.js, complemented by proficiency in other languages such as TypeScript, PHP, and Python. The candidate showcases a strong foundation in computer science with a Bachelor of Engineering in Information Systems Engineering. Throughout their career, they have engaged in various remote roles, underlying their expertise in building scalable distributed systems and web applications. Their open-source contributions, such as 'asyncmachine-go', demonstrate their ability to innovate in control flow libraries. With a history of optimizing financial tech systems and developing complex project management PWAs, the engineer has a proven track record in software engineering, underpinned by knowledge of databases and DevOps, including MySQL, PostgreSQL, and Docker.

solid foundation in front-end development Demonstrates expertise in JavaScript, React, HTML, CSS, and TailwindCSS, with a proven track record of optimizing websites and debugging.

- Frontend Developer at Liorra Tech and previous experience as a Freelance Web Developer and an IT Technician, embodies a strong background in full-stack development and cloud architecture. - Mastery in React, Apollo GraphQL, and technical support, offering robust solutions in technology services and leading digital transformation projects. - Proven history in enterprise-level software implementation and cloud solutions, adept at optimizing operations to meet business objectives. - Academically fortified with a Bachelor's Honors in Computer Engineering ongoing at Cape Peninsula University of Technology, with prior Bachelor's and Higher National Diploma in the same discipline. - Over 5 years of practical industry experience, with specialization in React and related web technologies, empowering businesses across Western Cape, South Africa. - Adept in software development practices, capable of guiding teams through SDLC and deploying innovative technologies that contribute to enterprise efficacy.

- 10+ years experience as a Full-Stack Developer with of developing robust web applications and services, including extensive experience in both frontend and backend technologies; - Technical proficiency with PHP and MySQL for server-side development, advanced JavaScript utilization on the client side; - Strong abilities with blockchain technology engagement, including smart contracts and wallet development using Solidity, Hardhat, Truffle, WalletConnect, and Metamask SDK; - Experienced with libraries Web3.js, and Ethers.js; - Ability to work Ethereum Blockchain, Binance Smart Chain (BSC), with different wallets including MetaMask; - Adept at working with a variety of frameworks and languages beyond core competencies, such as Laravel, Solidity, Node.js, and C++; - Up-to-date with modern practices, possessing comprehensive experience in codebase upgrades, performance optimization, and integrating third-party APIs; - Successfully led a development team, demonstrating strong leadership and project estimation skills.

- 5+ years of experience as a Full-Stack Developer, specializing in .NET (C#), Angular, and AWS; - Backend: Expertise in .NET Core, ASP.NET, Entity Framework, and REST API development; - Frontend: Strong skills in Angular, TypeScript, JavaScript, HTML, and CSS for building dynamic web applications; - Cloud & DevOps: Hands-on experience with AWS services (Lambda, S3, DynamoDB, API Gateway, IAM) and CI/CD pipelines; - Databases: Proficient in SQL Server and PostgreSQL, including query optimization and database design; - Architecture & Best Practices: Experience with microservices, event-driven architecture, and SOLID principles; - Testing & Security: Writing unit and integration tests, implementing security best practices, and API authentication; - Agile & Collaboration: Worked in Agile/Scrum teams, participated in code reviews, technical discussions, and mentoring; - Background in finance, e-commerce, and SaaS projects, developing scalable and high-performance applications.

Software Engineer with 5+ years of expertise in developing Java-based enterprise and fintech applications. Spearheaded a 15-member team with a focus on cross-functional collaboration to enhance project outcomes. Highlights include raising production system TPS to 500, reducing bug rates by 15%, and improving application uptime. Excelled in a lead role at i2c Inc., with achievements in reengineering APIs for better performance, implementing DevOps practices, and ensuring 100% system uptime. Technical strengths encompass Java, microservices using Spring Boot, distributed systems, API development, and proficiency with Docker, Kubernetes, and CI/CD. Holds a Bachelor's in Computer Science, backed by industry recognition with the Dean's List Academic Achievement Award.

Senior .Net Developer with over 6.5 years of experience, specializing in robust web application development in .Net and React, with a strong background in Computer Science. Possesses a solid understanding of Agile methodologies, microservices architecture, and full-stack development. Demonstrates expertise in .Net Core, ASP.NET MVC, EF Core, OAuth 2.0, Docker, Kubernetes, and Azure services. Notable accomplishments include leading the development of an internal generic library and a bug-reporting application, as well as achieving a Microsoft Azure Fundamentals certification and winning at the World Robot Olympiad. Education includes an MSc in Computer Science with a focus on Software and Service Architectures.

- 10+ years in software quality engineering, with a focus on automation testing and software development for tests; - Automation tools: Selenium WebDriver, TestNG, Selenide, RestAssured, JUnit, Playwright; - CI/CD maintenance using Jenkins, GitHub Actions, AWS SDK, and Docker, docker compose; - Designed and implemented functional, integration, end-to-end, API, and performance tests; - Programming languages: Java, Kotlin, TypeScript; - QA tools: Selenium, Cucumber, JMeter, Postman, Playwright, FitNesse; - Developed and maintained test automation frameworks from scratch, scaling regression suites to over 1,000 tests; - Experience testing RESTful APIs, GraphQL, backend systems, browser front-end - SQL databases: PostgreSQL, MySQL; - Experience in finance, logistics, SaaS, and e-commerce, sectors working on large-scale systems and being a part if international teams ; - Contributed to test planning, test documentation, and incident investigation processes (e.g., AWS CloudWatch Insights); - Mentored junior engineers and conducted technical interviews.

The software engineer in profile brings a robust blend of technical abilities and concrete achievements in software development, particularly in JavaScript. With experience ranging from back-end development to DevOps, they have demonstrated proficiency in automation tools like Cypress and Playwright, and testing frameworks such as Jest. They have excelled in roles at tretton37 and SMARTIS, impacting major clients like Polestar and IKEA through initiatives like complete architecture overhauls, developing CI/CD pipelines, and leading the migration of critical systems to the cloud. Their dedication to efficient, quality code is evident in their restructure of automation initiatives and focus on scalability and performance. The engineer has a Bachelor's degree in Organization and Management of Information Systems along with several impactful projects manifesting a deep understanding of SDLC and IaC principles. Overall, the candidate showcases several years of impactful work experience with a strong foundation in computer science and valuable technical expertise.

Dynamic Senior Backend Developer with over four years of experience specializing in Python and Django, with a solid foundation in computer science from a notable technical university. Expertise in developing RESTful APIs, working with multiple datastores including MySQL, SQLite, and MongoDB, and proficient in containerization with Docker. Adept at architectural design and patterns, and implementing Agile/Scrum methodologies for efficient project management. Demonstrated record in optimizing web applications and backend systems, with a rich portfolio inclusive of scalable solutions like a medical services booking application, storage booking system, and a car management dashboard. Fluent in both Ukrainian and Russian, with intermediate command over the English language, reinforces communication skills vital for international client interactions.

Software Developer | Backend & Web3 Engineer | Golang, TypeScript, PythonResults-driven software developer with 3+ years of experience in building scalable backend systems, financial infrastructure, and Web3 solutions. Proficient in Golang, Python, TypeScript, C++, and cloud-native technologies (AWS, Kubernetes, Docker).🔹 Currently at Syndr, designing high-performance exchange servers, optimizing data pipelines, and developing Web3 SDKs. 🔹 Previously at Epifi, led UPI-based financial workflows and transaction processing using Temporal. 🔹 Ex-Smarsh, where I improved database architecture and query performance for SaaS compliance solutions.Passionate about distributed systems, blockchain, and high-performance computing. Active contributor to open-source and tech communities.📌 GitHub: AbhinitKumarRai | LinkedIn: Abhinit Rai

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.

- 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.

- 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.

- 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

- 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.

- 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

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.

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.

- 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.

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.

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.

- 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.

- 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.

- 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.

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.

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.

-HubSpot Integration Engineer with over 3 years of hands-on expertise in creating and implementing custom solutions, integrating HubSpot CRM with various platforms.- Experienced in evaluating technical feasibility, estimation and commercial proposals elaboration during sales processes.- Proficient Hubspot API development and third-party API integrations, delivering data synchronization and custom integrations and workflows. Mostly with PHP, Symfony framework and middleware such as RabbitMQ, deployed to Docker containers.- Skilled in designing processing workflows and data structures for custom business processes, migrations and maintaining analytics tools like Google Tag Manager and Google Analytics for enhanced system monitoring.- Additional expertise in Python, Swift, Kotlin, mostly used for integraitons. Certified in Microsoft Azure AI Fundamentals,

- Software engineer with over 6 years of commercial experience in development, specializing in PHP. - Extensive experience in developing applications using PHP, including a high-loaded online store using SOLID, DRY, and KISS principles. - Strong background in building architecture and optimizing databases. - Skilled in mentoring senior specialists and conducting code reviews. - Proficient in stress testing and speed optimization techniques. - Knowledgeable in MVC and Domain-Driven Design architecture, as well as Restful API development using JavaScript and Vue.js. - Upper-Intermediate English. - Availability starting from ASAP

- Proficient in React, TypeScript, Redux, and Tailwind CSS; skilled in creating dynamic, reusable, and responsive UI components using Material-UI, Ant Design, and SCSS. - Expertise in Node.js, NestJS, Express, and Firebase; developed RESTful APIs and real-time features using Socket.IO. - Next.js experience includes server-side rendering, static site generation and used dynamic routing, API integration, and component-based architecture. - Developed critical full-stack functionality for SaaS platforms, e-commerce solutions with Stripe and Shopify integrations, and real-time applications. - Migrated platforms from low-code setups to fully custom React solutions. - Strong knowledge of database management with MongoDB, MySQL, and Airtable, using Mongoose and TypeORM for data modeling. - Integrated AI features using OpenAI APIs and LangChain. - Experience with low-code tools like Webflow and n8n to streamline workflows. - implemented CI/CD pipelines on GitHub Actions, - Team coordination and management experience, including product roadmap planning, features backlog management, code reviews, maintaining technical documentation for knowledge sharing.

- 10+ years of experience in software development using Java/JavaEE stack - Proficient in utilizing a wide range of technologies and tools, such as Spring, Elasticsearch, Apache Kafka, Apache Cassandra, Maven, JUnit/Mockito, Jenkins, Kubernetes, Docker, Git, Hibernate, Play framework, and more. - Skilled in code development, task prioritization, and documentation maintenance. - Mentored junior developers, performed unit and functional testing, and provided documentation maintenance throughout various projects. - Participated in the full life cycle of two large enterprise projects - Practical experience with systems-level designing - Upper-Intermediate English