Upstaff Developer Profile Directory

- 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.

Six years experienced QA Engineer in manual and automated testing, ensuring robust, scalable, and user-friendly applications. Skilled in identifying issues early, optimizing testing processes, managing QA team and collaborating closely with developers to enhance product reliability.⬥ Experience in testing web applications , mobile applications , Blockchain, E-commerce, software and hardware. ⬥ Programming languages: JavaScript, TypeScript, Java, Python , C# ⬥ API testing: Postman, Apidog ⬥ UI testing: Playwright , Selenium, BackstopJS, Ghost Inspector, Cypress ⬥ CI/CD Integration: GitHub, Docker, Jenkins CI, GitLab

Accomplished ASP.NET full-stack developer with over 10 years of experience, specializing in ASP.NET, MVC, and ASP.NET Core. Expertise in C#, JavaScript, and front-end technologies like HTML, CSS, and React.js. Proficient in database management with MSSQL, PostgreSQL, and Oracle. Strong track record in software analysis, design, and project management, including leading projects for government and banking sectors. Education in IT engineering enhanced by practical application in software development. Recognized for advanced problem-solving skills and commitment to continuous professional development.

A seasoned software engineer with over 5 years specializing in JavaScript/TypeScript and Angular development, this professional demonstrates deep technical expertise, evidenced by robust web application projects and contributions to business growth. Holds a rich engineering background, with a demonstrated history in implementing scalable solutions using frameworks like Angular, Node.js, and containerization with Docker. Technically proficient with modern software development practices including microservices architecture, TDD, and CI/CD, enabling efficient SDLC management. Leveraging a Computer Science degree and fluency in English, the engineer has a track record of mentorship, collaborative feature planning, and execution, underpinning a strong career trajectory within diverse remote and hybrid engineering roles.

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.

* Data Scientist with a Master’s Degree in Computer Science and extensive experience in machine learning, deep learning, and cloud services ( Azure,AWS and GCP). * 7 years of experience, proficient in building ML pipelines and deploying scalable solutions. * Developed and deployed a voice-to-voice pipeline for a call center VoIP system using Whisper, Llama, and MMS-TTS, including API integrations and Docker deployment. * Implemented a Google Doc AI Wrapper, improving document recognition accuracy through advanced preprocessing techniques. * Designed a deforestation detection system using clustering and Azure-based services to monitor forest areas.

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.

Senior Software Engineer with over a decade of expertise in designing, developing, and managing software solutions. Specializes in PHP, .NET, Python, Java, alongside advanced knowledge in AWS, Terraform, and CI/CD tools. Proven record in building scalable payment systems, e-commerce platforms, and cloud applications. Demonstrates strong leadership in driving technology strategy and fostering innovative solutions with effective use of DevOps practices to enhance deployment efficiency. Holds a substantial education in computer science complemented by professional certifications in DevOps and Full-stack Development. Experienced in API development, system security, and database management with notable project accomplishments in payment integration and systems automation.

With over three years of professional experience, the software engineer brings a robust background in customer service with solid technical skills. While the resume provided does not explicitly mention a software engineering role or computer science education, it highlights advanced computer proficiency, including knowledge of various software and operating systems. The candidate shows strong expertise in using CRM software like Oracle and Zendesk, which are pivotal in software development for customer-related analytics. Also noted is the engineer's experience with Microsoft Office and G Suite. The candidate's proven track record of analyzing data, managing customer databases, and implementing process improvements demonstrates an analytical mindset and problem-solving skills relevant to software engineering tasks.

With over 12 years of experience, the engineer is a Growth Strategist and Marketing Automation Specialist with a strong foundational expertise in computer science, specializing in CRM and HubSpot technologies. Their portfolio includes the implementation of CRM systems, data-driven marketing strategies, and automation of multi-channel campaigns, with notable achievements in increasing operational efficiency, revenue, and company growth. This candidate is also versed in various programming methodologies, SDLC, and software development best practices.

- Experienced Machine Learning Engineer with Data Engineering skills - Experience in ensemble recommendation systems, customer behavior prediction, and recruitment insights, analytics, chatbots. - Experience in user retention, engagement, operational efficiency increase, enhancing stock turnover, forecasting accuracy, automated damage assessment models, and vehicle security through advanced ML models and BigData. - Worked with industries: insurance, finance, restaurants - Solid expertise with Big Data, Natural Language Processing, Computer Vision

- Senior Machine Learning Engineer with extensive experience in providing innovative machine learning solutions and automation. - Experience with ontology enrichment & transformation, Named Entity Recognition, recommendation systems, sentiment analysis - Experience with Data Engineering stack - Advanced skills in Python, Flask, FastAPI, Redis, Postgres, TensorFlow, PyTorch, Elasticsearch, Docker, and Hugging Face. - Proven track record in data analysis projects implementation.

- 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.

With over a decade of experience in the software industry, the engineer has a proven record of leading technical initiatives and delivering innovative solutions. Expertise includes Android app development, Java programming, and IT consulting, with a demonstrated ability to drive growth through technology. The engineer's technical acumen is complemented by certifications in Agile methodologies, including ScrumMaster and Agile Scrum Foundation, showcasing a strong understanding of SDLC and efficient project management techniques.

A multi-skill person with extensive technical expertise and a robust engineering background. With over a decade of experience in software development, the engineer possesses a deep understanding of various programming languages, tools, and methodologies. Notably, the engineer has implemented and optimized CRM systems, particularly HubSpot, enhancing automation and CRM adoption across teams.

A multi-skill with a robust background in HubSpot CRM optimization and a track record of successful project management delivers technical proficiency and a strong understanding of SDLC practices. Experienced in SaaS solutions implementation and automation workflows, excels in increasing CRM adoption and enhancing lead generation. Strengths include strategic development and technical support, with a focus on creating efficient marketing and sales pipelines. Demonstrates hands-on experience in troubleshooting, report creation, and dashboard setup, underpinned by a commitment to continuous learning and process improvement.

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.

- Team Lead / Tech Lead / Software Engineer / Blockchain Developer with 10 years of experience. - Strong expertise in blockchain development, building decentralized applications (dApps) using Solidity and Rust for EVM and Solana networks. - Proficient in frameworks like HardHat and Anchor. - Develop, test, and deploy smart contracts, integrating wallets (e.g., Metamask) and working with DeFi protocols (Uniswap, Aave) and NFT standards (ERC-20, ERC-721). - Has solid experience in backend development using Django, FastAPI, and SQLAlchemy for scalable APIs and microservices. - Familiar with CI/CD automation (e.g., GitLab CI/CD, GitHub Actions) and cloud infrastructure on AWS (Lambda, EKS, RDS). - Skilled in integrating blockchain technologies with backend systems, ensuring code quality through unit testing, fuzz testing, and security audits with tools like RustSec and Slither.

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.

With a focus on operations and HubSpot expertise, the featured engineer brings a strategic mindset to project management. Possessing strong experience in utilizing CRM systems, especially HubSpot, they have a proven track record of enhancing operational efficiency. Skilled in various sales and financial software such as Stripe and PandaDoc, and adept at website development through WordPress using Elementor, their technical prowess spans across customer service platforms to marketing automation. Additionally, their proficiency covers a robust range of HubSpot certifications, demonstrating a commitment to staying at the forefront of marketing technology and operations optimization.

- 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.

- 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.

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.

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.

- 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

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.

- 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

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.