Upstaff Developer Profile Directory

• Over 9 years of experience in software development with a focus on Java 8/17 back-end applications, utilizing Spring Boot and HAPI FHIR frameworks.
• Proficient in designing and developing APIs, business logic, and database solutions using PostgreSQL, Kafka, Docker, and Liquibase in healthcare and finance sectors.
• Strong expertise in object-oriented design, design patterns, and software development lifecycle within Agile methodologies including Scrum and Kanban.
• Hands-on experience with HL7/FHIR protocols and standards, contributing to protocol converter projects for healthcare applications.

• 3+ years in SaaS QA engineering with expertise in manual and automation testing using Selenium, Playwright, and Katalon Studio.
• Proficient in Java, Python, JavaScript, TypeScript, C#, SQL, and test automation frameworks integrated with CI/CD pipelines (GitHub Actions, Jenkins).
• Strong command of STLC, risk-based testing, shift-left principles, API validation (Postman), and defect lifecycle management using Jira and Linear.
• Led QA for 3 SaaS products, designing 500+ reusable test cases covering 50+ features, achieving ~45% regression automation coverage.
• Experienced in Agile methodologies, sprint coordination, mentoring junior engineers, and driving process improvements for release stability.

• Senior React Native engineer with 9+ years in mobile and web development, including 6+ years with React Native in production.
• Delivered cross-platform applications across healthcare, fintech, real estate, and logistics domains, including patient-facing clinical trial apps (HIPAA-compliant).
• Experience includes real-time features using WebRTC, offline-first data handling, and performance optimisation for mobile apps.
• Worked with React, Next.js, GraphQL, and AWS; contributed to mobile architecture and led frontend teams.

• Senior React Native engineer with 7+ years building mobile apps with React Native (Expo, CLI) and React, focusing on scalable app architecture and feature delivery.
• Experience with video features in social and communication apps (live streams, video calls, feed-based consumption), including HLS playback, buffering, and performance tuning on mobile.
• Worked on mobile-first video UX: smooth playback, fast loading, adaptive bitrate, and seamless navigation between video items.
• Hands-on with monetization, analytics, and integrations (Firebase, GraphQL), plus mentoring and collaboration across product and backend teams.

• Backend Engineer with 4+ years of experience in Java, TypeScript, and Python, working with Spring Boot and NestJS in microservices architectures.
• Experience in healthcare integrations: worked with Epic/MyChart, HL7 (R4) data processing and conversion into internal services.
• Built and maintained backend services handling high-load systems using Kafka, Redis, Cassandra, and PostgreSQL.
• Developed integration services for third-party systems, including batch processing and REST-based communication in AWS environments.

• Engineering background from IIT Patna with a strong CGPA of 8.97 in Computer Science and Engineering.
• Hands-on experience in modernizing high-stakes trading platforms using React functional components and Material UI, enhancing performance and scalability.
• Proficient in C++, Python, JavaScript, Node.js, and web technologies with expertise in algorithmic trading strategies and risk management, achieving 2500% returns in simulated markets.
• Demonstrated competitive programming excellence with top global ranks in ICPC and Hacker Cup, and advanced problem formulation for AI code generation.

• Digital Communication
• Calendar/Email Management
• Project Management
• Technical Tool Proficiency
• Interpersonal Skills

• Help In Calendar Management
• Email Triaging
• Customer Service
• Data Entry
• Managing and Organizaing Workforce
• Recruiting Plan
• Onboarding And Training
• Processing Payment
• Reconciliation
• Payroll Processing
• Financial Reporting
• Budgeting and Forecasting
• Auditing

I have been able to achieve so many things in a financial investment company,I learnt how to check the bank position of the company daily,how to confirm payment etc

• Senior Java Engineer with 10+ years of experience specializing in Java, Spring Boot, Hibernate, and microservices architecture.
• Proficient in full-stack development using Angular, React, TypeScript, and RxJS, with strong expertise in PostgreSQL, Redis, and cloud platforms (GCP, AWS, Azure).
• Hands-on experience delivering scalable solutions in real estate compliance, ticket management, and corporate social networking domains.
• Skilled in CI/CD pipelines, containerization (Docker, Kubernetes), automated testing (JUnit, TestNG, Mockito), and code quality tools (SonarQube).
• Holds a Bachelor’s degree in Informatics and certifications in Java and Google Cloud.

• Over 25 years of expertise in network management, design, and security-focused automation, with leadership roles including CTO and Head of Operations.
• Proficient in Perl, Python, and C, with extensive experience in protocols (XML, JSON, YAML, REST) and databases (MySQL, PostgreSQL, SQLite, ElasticSearch).
• Skilled in containerization and orchestration using Docker, Proxmox, and Gitlab CI/CD pipelines, emphasizing continuous development and automation.
• Active contributor and maintainer of multiple open-source projects such as LetheanVPN, AIdraw, and Zabbix integrations
• Solid academic foundation with a PhD in Computer Science and practical experience across Linux, FreeBSD

• Over 25 years of experience in network administration, VoIP technologies, and cybersecurity, with a strong focus on SIP server configuration and Asterisk implementation.
• Proficient in Python programming, Blockchain, Linux, and ElasticSearch, with hands-on expertise in developing embedded multiplatform SIP server solutions.
• Extensive academic background including a PhD in Information Technology
• Leadership roles as CTO and Head of Operations, driving security operations and software development in cybersecurity firms.
• Active contributor to open-source projects and academic conferences, with published work on Kamailio syntax generation and configuration parsing.

• 6+ years with Front-end/Mobile: cross-platform applications, React Native, React.
• IoT & hardware: BLE and Wi-Fi device pairing (Soft-AP, Protobuf), custom native bridges (iOS/Android) for hardware communication - Ninja Pro Connect app with 100K+ downloads
• Short-form video: TikTok-style educational app with HLS playback (Expo Video), player pooling, lazy loading of video batches, and quality fallback for low-end devices
• Production tooling: push notifications (Firebase + Notifee, Android foreground/keep-alive services), analytics/session replay (Mixpanel, LogRocket, Sentry, Bugsnag), CI pipelines, ESLint + pre-commit quality gates.
• Familiar with New Architecture (Fabric, TurboModules, JSI, Hermes)

Led full-stack development of 20+ production applications combining React frontends with AI-powered Python backends. Integrated LLM APIs (Groq, Gemini, Anthropic) into customer projects, building RAG systems and fine-tuned models on local GPUs. Mentored 5+ junior developers. Recently built production React+Flask chatbot with Groq API, deployed on Vercel. Portfolio: https://pro-two-chi.vercel.app/

• Senior React Native Developer with 16 years in software development, specializing in cross-platform mobile applications for iOS and Android using React Native and Expo.
• Proficient in JavaScript, TypeScript, Node.js, and backend technologies including Express.js, MongoDB, and MySQL, with extensive experience in API design and integration.
• Expertise in AI-assisted development tools (Claude Code, Cursor, GitHub Copilot) to accelerate delivery and improve code quality.
• Skilled in modern CI/CD pipelines (GitLab, GitHub Actions, Fastlane, Azure DevOps) and testing frameworks (Jest, Detox) ensuring robust, maintainable software.

Backend-focused Full Stack Developer with 1+ year of experience in Node.js, Express.js, TypeScript, and Sequelize ORM. Skilled in building scalable REST APIs, JWT authentication with RBAC, and database optimization using MongoDB and MySQL. Experienced in React.js, Next.js, and Tailwind CSS for frontend development. Proficient in Firebase Cloud Messaging, ExcelJS, Puppeteer, AWS EC2, and Cloudinary. Strong understanding of asynchronous programming, middleware architecture, OOP, and API integration. B.Tech graduate in Information Technology with a passion for developing secure, scalable, and high-performance applications.

• Senior Software Engineer with 5+ years in frontend and full stack development, specializing in Next.js, Angular, and scalable architectures for Web3 and AI-driven platforms.
• Proven expertise in blockchain integrations, real-time systems, and API design, delivering features like automated on-chain actions and wallet-based authentication.
• Strong backend skills with FastAPI, Python, PHP, and database optimization (PostgreSQL, SQLite), improving performance and reducing errors by up to 25%.
• Experienced in mobile app development using Ionic and Cordova, enhancing user engagement and offline functionality for global clients.

• Software Engineer with 1+ years of experience in developing scalable full-stack applications using .NET (C#), React.js, and SQL Server, focusing on responsive UI and efficient backend integration.
• Expertise in AI-driven automation, including LLM-powered applications, Retrieval-Augmented Generation (RAG), prompt engineering, and vector embedding pipelines using Python and AI frameworks like TensorFlow and PyTorch and Exploratory Data Analysis (EDA) to support AI/ML model development and deployment
• Proficient in designing and optimizing REST APIs, database query workflows, and integrating intelligent automation solutions within Agile cross-functional teams.

• 7+ years expertise in Go, specializing in distributed systems, microservices, and legacy system modernization with zero downtime.
• Contributor to open-source projects (KrakenD API Gateway), with published works on distributed teams and mesh networking, demonstrating commitment to software architecture excellence and continuous learning.

• Software engineer with over 7 years of experience specializing in full stack and front-end development.
• Proficient in AngularJS, Sockets, and web/mobile tool development, with a strong background in modern web technologies and frameworks.
• Experienced in Agile methodologies and collaborative team environments across international projects in Spain, the US, Dominican Republic, Argentina, and Venezuela.
• Holds a degree in Informatics from Universidad de Oriente, providing a solid foundation in computer science principles and software development lifecycle.
• Demonstrated ability to maintain and enhance commercial platforms, integrating user feedback and ensuring robust, scalable solutions.

• AI/ML Engineer and Python Developer with 6+ years of experience designing and deploying production-grade AI systems and scalable backend services using FastAPI, PostgreSQL, Redis, and Docker.
• Expertise in Generative AI, LLMs, RAG pipelines, multi-agent systems, and real-time Voice AI, demonstrated by leading complex projects integrating Whisper, ElevenLabs, LangChain, LangGraph, and pgvector.
• Proficient in asynchronous programming with Python asyncio, building custom real-time voice pipelines, and managing multi-phase conversational agents with compliance-critical logic.

• Over 5 years of experience in technical support and customer service roles, demonstrating strong problem-solving and troubleshooting skills.
• Proficient in managing complex workflows and compliance auditing within fast-paced environments, ensuring accuracy and efficiency.
• Skilled in administrative and recruitment coordination, with expertise in document management and process optimization.
• Experienced in coaching and team leadership, enhancing performance through data-driven feedback and operational support.
• Strong communication and multitasking abilities, adept at supporting cross-functional teams and maintaining high-quality standards.

• Built LLM and RAG features (prompt engineering, structured JSON outputs, multi-model fallback), including a RAG memory layer for continuous, personalized AI sessions.

• Shipped 8+ full-stack, user-facing features in a 4-month AI platform internship using FastAPI, Next.js, React, and TypeScript.

• Automated tasks and built web scrapers in Python (Selenium, BeautifulSoup, PyAutoGUI) in fintech environments.

• Strong in backend, REST APIs, and cloud (Azure, GCP, Firebase), with CI/CD and Agile.

• Master's in Computer Engineering & Big Data; game projects built in Unity and Unreal Engine 5.

• Software Engineer with 4+ years in secure, scalable enterprise systems using ASP.NET Core, React.js, Node.js, AWS, and Okta identity platforms.
• Expertise in architecting authentication flows, including MFA, SAML integrations, JWT validation, and session management.
• Proven experience in cloud-native solutions, serverless architectures, Terraform automation, and CI/CD pipelines.
• Skilled in troubleshooting production issues, performance optimization, and implementing GenAI-enabled automation tools.
• Bachelor's in Computer Science & Engineering with strong background in IAM, API architecture, and DevOps monitoring tools.

• 23+ years in Big Data and AI architecture, specializing in scalable AI-driven systems, multi-agent automation, and NLP solutions.
• expertise in designing AI platforms for document processing, recruitment, semantic search, and generative AI applications.
• Strong academic foundation with a PhD in Information Technology and 100+ peer-reviewed publications, integrating research rigor into engineering practice.
• Led development of AI products like Talina.ai (AI-augmented HR sourcing) and DialTics (computer vision for call center analytics)
• Skilled in AI strategy, data analytics, and software architecture, bridging R&D with enterprise software delivery across diverse domains.

• Full Stack Engineer with 9+ years of expertise in MERN stack, TypeScript, Node.js, React.js, and cloud technologies including AWS (EC2, S3, RDS).
• Proven track record in designing scalable microservices architectures, implementing CI/CD pipelines, and enhancing application security using JWT and OAuth.
• Led development of enterprise-grade applications and dashboards integrating complex APIs and cloud services, notably for clients like Amazon Seller Center and Barclays.
• Skilled in Agile methodologies, automated testing frameworks (Jest, Cypress), and containerization with Docker to ensure high-quality code.
• with strong database expertise in MongoDB, SQL, MySQL, and PostgreSQL

• Full Stack Engineer with 12+ years of expertise in .NET (Core 3 to 8, Framework 4.8), C#, Angular (up to v13), React.js, and SQL Server, delivering enterprise-grade software solutions.
• Proficient in cloud platforms including Azure, AWS, Kubernetes, and DevOps practices with CI/CD pipelines using Jenkins and Git.
• PL/SQL, MongoDB, and ETL processes, demonstrated in projects like Liz Claiborne OLAP data warehouse and AgrinHealth healthcare platform.
• Experienced in integrating third-party APIs (PayPal, Stripe, trading platforms) and building scalable SaaS/PaaS solutions with microservices
• Holds a BSc in Computer Science, skilled in Agile, RUP, UML, and software development lifecycle management.

• Full Stack Engineer with 8+ years of experience specializing in .NET Core (3.0 to 8.0), C#, ASP.NET MVC, and front-end frameworks including Angular and React.js.
• Proven expertise in cloud platforms Azure and AWS, implementing services like Azure Functions, App Service, and AWS Lambda.
• Skilled in real-time communication technologies such as SignalR and Socket.io, enhancing user engagement in complex applications.
• Strong background in database management with SQL Server, MySQL, and MongoDB, optimizing performance and reliability across projects.
• Computer Engineering graduate with hands-on experience in CI/CD pipelines, Docker, DevOps practices, and modern software development methodologies.

• Full-stack developer with 7+ years of expertise in Python (FastAPI, Flask), Java, Node.js, and modern frontend frameworks (Next.js, React, TypeScript).
• Proven success in legacy system modernization, including architecting a custom AEM Managed Control Process tool to automate complex content migrations, enhancing data integrity and team velocity.
• Strong background in scalable backend systems, cloud-native deployments (AWS Lambda, Docker, Kubernetes), and geospatial data management with PostgreSQL/PostGIS.
• Experienced in Agile methodologies (Scrum, Kanban), full project ownership, client communication, and cross-cultural remote collaboration with US/Latam teams.
• Engineering education

• 13+ years of expertise in full-stack development and solution architecture, specializing in .NET Core, C#, ASP.NET MVC, and cloud platforms including Azure and AWS.
• Proven track record in modernizing legacy systems to modular, microservices-based architectures with secure, HIPAA-compliant cloud deployments.
• Strong background in database design and optimization using SQL Server and Oracle, with hands-on experience in performance tuning and OLAP data warehousing.
• Skilled in CI/CD pipeline imp, DevOps practices, and Agile methodologies to enhance software quality.
• Led projects integrating IoT, healthcare data, and enterprise reporting, showcasing software design and team leadership.

• Software Engineer with 4+ years of experience building scalable web and mobile applications using React.js, Node.js, Express.js, and MongoDB.
• Skilled in frontend development with React, Redux Toolkit, Tailwind CSS, and backend RESTful API development, state management, and performance optimization.
• Experienced in Agile workflows, CI/CD pipelines, and cross-functional collaboration to deliver high-quality software solutions.
• Developed complex platforms including AI-powered recruitment systems, procurement platforms, eCommerce applications, and business management solutions.
• Experienced in implementing secure integrations, responsive user interfaces, and scalable application architectures.

• Backend Engineer with strong expertise in Java (Spring Boot, Kafka), Python (FastAPI, Airflow), and Scala (Akka, Spark)
• Designs and delivers scalable microservices and cloud-native applications with Kubernetes, Docker, Terraform, and AWS (RDS, S3, Lambda)
• Experience building secure IAM platforms and implementing auth protocols (OAuth2, OIDC, SAML, FIDO2)
• Skilled in CI/CD (GitLab, Jenkins, Azure DevOps), automated testing, and infrastructure as code
• Works with distributed systems, focusing on reliability, performance, and maintainability