Hire Vetted Web Application Engineers at Upstaff - Page 7

• Senior Software Engineer with 3+ years specializing in full-stack development and blockchain systems across EVM, Solana, and Bitcoin ecosystems.
• Proficient in JavaScript, TypeScript, Python, Rust, Go, and Solidity; experienced with React.js, Next.js, Node.js, REST APIs, and microservices architecture.
• Led smart contract development and backend automation for decentralized applications, including multi-chain DeFi platforms and NFT systems.
• Skilled in blockchain integrations, wallet connectivity, on-chain data processing, and decentralized storage using IPFS.
• Holds a B.E. in Computer Science and a P.G. Diploma in Fintech & Blockchain; awarded 1st place at BlockBash 2024 ICP Hackathon.

• Web3 Engineer with 2+ year experience in decentralized finance (DeFi) projects, specializing in scalable backend development and RESTful API design using Typescript, Golang and Solidity.
• Proficient in blockchain architecture, Web3 technologies, and smart contract development, with hands-on experience in Docker, MySQL, Linux, Git, and GitLab.
• Demonstrated ability to design, implement, test, and monitor backend solutions in fast-paced environments, contributing to cross-functional team projects.
• Experience in software development lifecycle (SDLC) practices, code quality assurance, and integration of new features enhancing end-user flows.

• AI/ML Engineer with 3.5 years of experience specializing in Python, FastAPI, PyTorch, TensorFlow, and OpenCV for developing real-time AI solutions including video avatars, hotel monitoring, and social media automation.
• Proficient in asynchronous programming, API integration, CI/CD pipelines (GitHub Actions), and cloud deployment on AWS, ensuring scalable and efficient back-end systems.
• Expertise in LLM prompt chain algorithms, multi-source data scraping, and AI-driven analytics for business intelligence and sales optimization.
• Holds a Bachelor’s degree in Computer Science and certified in Practical Deep Learning with PyTorch and SQL for Data Science

• Full-Stack Developer with 3 years of experience specializing in Python (FastAPI, Flask), Java (Spring Boot with Hibernate), and modern JavaScript frameworks (React, Next.js), delivering scalable web applications and microservices.
• Proficient in API integrations, real-time communication (WebSockets, SSE), and cloud-native development using Docker, AWS, and CI/CD pipelines with GitHub Actions.
• Hands-on expertise in RDBMS (PostgreSQL, MySQL), NoSQL (MongoDB, Redis), and advanced front-end state management (Redux, Redux-Saga, RTK Query) with UI/UX optimization and performance tuning.

• 3.5 years of full-stack development experience specializing in Python (FastAPI, Django, DRF, Flask) and React.js with TypeScript for frontend.
• Proficient in asynchronous programming, OOP principles, unit testing, CI/CD pipelines (GitHub Actions), and Agile methodologies (Scrum, Kanban).
• Developed AI-integrated web applications in legal and healthcare domains, handling complex file processing and AI-driven features.
• Skilled in RDBMS (PostgreSQL, MySQL), NoSQL (Redis, Firestore), Docker, cloud platforms (AWS, GCP), and technical documentation.
• Experienced in SDLC from architecture to deployment, code reviews, refactoring, and collaborative team environments.

• 5.5+ years engineering high-load B2B/B2C platforms in AdTech, fintech, blockchain, and real-time communications, specializing in backend and full stack development.
• Expertise in Python, JavaScript/TypeScript, Django, React, PostgreSQL, Redis, Docker, AWS, and Azure, with proven impact: 109k query reduction, 92% latency cut, and 60 FPS UI performance.
• Skilled in SDLC ownership, architectural refactoring, multi-tenant SSO, microservices, and CI/CD pipelines using GitHub Actions.

• Back-End Developer and DevOps Engineer with 4.5 years of experience in designing and developing scalable backend systems using Python (Django, DRF, FastAPI) and deploying on AWS with Docker, Kubernetes, and Helm.
• Proficient in implementing secure, role-based access control and optimizing database schemas across RDBMS (PostgreSQL, MySQL) and NoSQL (Elasticsearch, Redis) environments.
• Experienced in Agile methodologies, test-driven development, and applying design patterns (Factory, Strategy) to maintain clean, modular codebases in healthcare and government domains.

• AI/ML Engineer and Backend Developer with 4 years of experience in designing RAG-based chatbots, AI agents, and automated workflows using Python, FastAPI, Flask, and SQL/NoSQL databases.
• Expertise in integrating LLMs (GPT, Claude, LLaMa) with vector search technologies (Pinecone, ChromaDB) and enterprise tools like Salesforce and Google Workspace for real-time communication and lead generation.
• Proficient in software architecture design, prompt engineering, and building scalable AI systems with robust error handling and workflow automation using n8n and Zapier.

• Engineer with 6+ years leading backend development and architecture of AI-driven microservice platforms in fintech, e-commerce, and digital content.
• Expert in Python, FastAPI, Django, event sourcing, and cloud-native solutions (AWS, GCP, Kubernetes), delivering scalable, real-time data processing systems.
• Proficient in SQL/NoSQL databases, messaging queues (Kafka, RabbitMQ), containerization (Docker), CI/CD pipelines, and API integrations.
• Skilled in agile methodologies, code quality enforcement, mentoring, and end-to-end project delivery of complex AI and fintech applications.

• Full-Stack Developer with 3 years of experience specializing in Blockchain, AI, and Healthcare AI domains, delivering scalable, secure, and modular web and mobile applications.
• Proficient in Python, JavaScript/TypeScript, React, Next.js, FastAPI, Django, PostgreSQL, Docker, and cloud infrastructure (GCP), with strong expertise in asynchronous programming and software architecture design.
• Implemented AI-driven solutions including Retrieval-Augmented Generation pipelines, vector database semantic search, and real-time chatbots integrating LangChain and OpenAI technologies.

• AI/ML Engineer with 3 years of experience delivering production-ready machine learning systems, including real-time generative AI avatars and multi-agent orchestration frameworks.
• Proficient in Python, PyTorch, FastAPI, and LLM ecosystems (OpenAI, LLaMA, LangChain), with strong expertise in deploying scalable AI solutions using Docker and AWS cloud services.
• Skilled in full ML lifecycle: data engineering, model training, deployment, monitoring, and optimization, demonstrated by building an AI-driven ad bid price optimization model and modular workflow systems.

• Full-stack engineer with 7+ years in PHP/WordPress and 5+ years in JavaScript/TypeScript;
• Built data platforms using Python, SQL, ETL pipelines (Airflow, PySpark), and AWS;
• Developed custom WordPress plugins, REST APIs, and data-driven features (tables, reports, analytics);
• Skilled SQL and database design (PostgreSQL/MySQL), including query optimization;
• Experience integrating AI/LLM features into data products and analytics workflows.

• Senior Full-Stack Engineer with 9+ years in FinTech and E-commerce, proficient in React, Node.js, NestJS, PHP, Java, and .NET Core.
• Expertise in building high-volume transactional systems, fraud detection microservices, and credit onboarding platforms with 99.99% uptime and sub-120ms response times.
• Skilled in Agile delivery, CI/CD pipelines, and cloud-native DevOps using Docker, Kubernetes, AWS, and Azure.
• Strong background in regulatory compliance and platform modernization, achieving 85% test coverage and 40ms faster response times.
• Computer Science graduate with proven ability to lead cross-border teams and deliver scalable, secure, and observable APIs and CMS solutions.

• Software engineer with 10+ years in full-stack JavaScript, specializing in scalable web, hybrid mobile, and cross-platform desktop applications using React, Next.js, Node.js, and TypeScript.
• Proven track record in designing microservices, REST/gRPC APIs, and cloud infrastructure automation with AWS, Docker, Kubernetes, and Terraform.
• Led development of enterprise-grade platforms including e-commerce, telecom microservices, and aviation weather systems, emphasizing modularity, security, and performance.
• B.Tech in Computer Science with strong open-source contributions to Ionic and Capacitor ecosystems, demonstrating commitment to community and innovation.

Senior Software Engineer with 11+ years building scalable web applications using JavaScript/TypeScript, React, Node.js, and Express. Expertise in designing high-performance RESTful APIs, improving data retrieval by 35% and reducing response times by 30%. Strong database experience (PostgreSQL, MySQL, MongoDB, DynamoDB) with proven optimization gains. Skilled in TDD with Jest and Mocha, achieving 90%+ coverage and reducing defects. Experienced in Agile, CI/CD, microservices, serverless architecture, and mentoring engineers.

• Designed and scaled high-performance backend systems handling up to 500 TPS, improving reliability and throughput in banking and real-time platforms.
• Reduced account opening turnaround time by 80% through BPM workflow optimization.
• Led migration of legacy systems to microservices, enhancing scalability and maintainability.
• Improved observability using ELK, Grafana, and Micrometer, and mentored engineers to boost team productivity and code quality.

• Backend Engineer with 5+ years designing scalable SaaS backend systems using Node.js, TypeScript, and SQL databases.
• Proven expertise in API design, database optimization (indexing, query tuning), and building high-reliability distributed services.
• Hands-on experience with cloud infrastructure (AWS, Docker), microservices architecture, and CI/CD pipelines.
• Contributed to performance improvements reducing infrastructure costs by $12k+/year and boosting user engagement by 40%.
• Expanding skills in C#/.NET ecosystem, with strong debugging, testing, and asynchronous collaboration in international teams.

Full Stack Developer with 3+ years of experience in React.js, Node.js, and Express, working with databases like MongoDB, MySQL, and PostgreSQL. Experienced in building scalable web applications and APIs, with hands-on use of AWS services including Cognito, Lambda, S3, and EC2. Skilled in implementing secure authentication systems (Cognito, Keycloak, CAS) and role-based access control. Strong foundation in clean architecture, CI/CD with GitHub Actions, and agile practices. Computer Science graduate with experience in microservices, monorepos, and performance optimization across healthcare, education, and sustainability domains.

• Sr Full-Stack Developer and Tech Lead with 9+ years of experience specializing in Node.js, Nest.js, Vue.js, GraphQL, and microservices architecture.
• Proven expertise in designing scalable backend systems, optimizing performances, and integrating complex third-party AI and invoice processing services.
• Led development of dynamic web platforms featuring drag-and-drop UI builders and CI/CD pipelines, enhancing team productivity and deployment efficiency.
• Strong command of modern front-end frameworks (Vue.js Options/Composition API, Nuxt.js) and backend ORM tools (Prisma, TypeORM, Sequelize) with robust testing and automation practices. Experienced in cross-functional team leadership.

• Proficient in full-stack development with expertise in Flutter, .NET, Solidity, and blockchain technologies, delivering robust and scalable solutions.
• Demonstrated leadership in managing projects and teams, including roles as Project Development Manager and Senior Developer.
• Experienced in SDLC best practices, software architecture, and cross-platform development, with a strong focus on Web3 and blockchain integration.
• Proven track record in freelance and corporate environments, contributing to diverse projects across Brazil and Canada.

Innovative Senior Software and AI Engineer with 13+ years of experience across backend, frontend, mobile development, and system design. Skilled in Python, Node.js, PHP, C#, Java, cloud-native architectures, and modern frameworks including React, Next.js, Angular, React Native, and native Android. Experienced in building scalable applications, developer tools, and intelligent automation that improve SDLC efficiency. Strong background in CI/CD, OOP, performance optimization, and testing frameworks for high-impact engineering teams.

Innovative Senior Software and AI Engineer with 13+ years of experience across backend, frontend, mobile development, and system design. Skilled in Python, Node.js, PHP, C#, Java, cloud-native architectures, and modern frameworks including React, Next.js, Angular, React Native, and native Android. Experienced in building scalable applications, developer tools, and intelligent automation that improve SDLC efficiency. Strong background in CI/CD, OOP, performance optimization, and testing frameworks for high-impact engineering teams.

Full-stack developer with 6+ years of experience building scalable SaaS and e-commerce solutions across PHP (Laravel, Symfony, Yii2, Magento 2) and Node.js ecosystems. Skilled in database design with MySQL, PostgreSQL, and MariaDB, including Liquibase version control. Expert in REST and GraphQL API development and integrating payment gateways like Stripe and Klarna, with multi-tenant projects such as ParkingBadge and Sharefox. Proficient in VueJS, React, Angular, Node.js, and Tailwind CSS, plus DevOps practices including Docker, CI/CD, and Linux administration. Master's in System Information in Economics, leveraging AI tools like Claude and Cursor for rapid development.

• Full-Stack Developer with 3 years of experience in scalable web applications using JavaScript/TypeScript, React, Next.js, Node.js (NestJS, Express), and PostgreSQL.
• Expertise in microservices architecture, event-driven systems with Kafka, real-time data handling, and multi-tenant platform development.
• Proficient in containerization (Docker, Kubernetes), cloud deployment (AWS), and CI/CD pipelines ensuring high availability and performance.
• Skilled in modern state management (Zustand, Redux Toolkit), validation (Zod), and UI frameworks (Tailwind CSS, Material UI).

• Proficient in backend development using Node.js, Express.js, and TypeScript, with hands-on experience designing scalable microservices and multi-VM architectures, including Nginx reverse proxy implementations.
• Skilled in cloud infrastructure management across AWS, Azure, and DigitalOcean, optimizing resources, alongside CI/CD pipeline automation using GitHub Actions and Azure DevOps.
• Strong expertise in databases (MongoDB, MySQL, PostgreSQL), frontend frameworks (React.js, Angular), and software development best practices, including feature-based Git workflows, system design, and secure file handling with MongoDB GridFS.

• Over 6 years of experience in frontend engineering with expertise in React, TypeScript, GraphQL, and state management libraries like Redux and Zustand.
• Proven track record in optimizing performance (up to 40%) and reducing load and deployment times through modular architecture and build pipeline enhancements using Webpack and Vite.
• Strong background in scalable UI architecture, CI/CD, accessibility (WCAG).
• Hands-on experience leading teams and improving development workflows with structured Git-flow and PR rules, enhancing code quality and delivery speed.
• Skilled in integrating third-party APIs, micro frontends, and real-time communication via WebSockets.

An accomplished front-end engineer with a solid foundation in Computer Science from UNAD University and over 8 years of professional experience, including 4 years as a Senior Full-stack Developer at Adastra. Demonstrates advanced proficiency in React.js, Redux-Saga, Vue.js, Angular.js, and modern web development with a proven track record of leading the development of scalable, responsive, and high-performance web applications. Notable achievements include spearheading a migration to microservices architecture, yielding a 40% reduction in system downtime. Possesses in-depth knowledge of cloud services (AWS), CI/CD methodologies (Jenkins), and containerization (Docker).

• Senior .NET / Full-Stack Engineer with 12+ years delivering scalable enterprise and mobile solutions using .NET Core, MAUI, Flutter, and React.
• Expertise in microservices, cloud-native architectures (AWS/Azure), and WISP network design with MikroTik and PPPoE.
• Proven track record building ERP systems, AI-driven microservices, and cross-platform mobile apps with real-time APIs.
• Strong leadership in remote Agile teams, managing full SDLC, CI/CD pipelines, and distributed system deployments.
• Ongoing B.Sc. in IT Engineering, skilled in C#, Kotlin, Swift, Docker, Git, and advanced networking for ISP infrastructure.

• Software Engineer with 10+ years of expertise in backend development, specializing in Node.js, TypeScript, Python, and Golang for scalable, secure financial platforms.
• Proficient in Secure Software Development Lifecycle (SSDLC), OWASP Top 10 mitigation, API and Cloud Security (AWS), integrating security into architecture and development.
• Experienced in microservices, RESTful and GraphQL APIs, cloud-native solutions using AWS Lambda, API Gateway, and data engineering with SQL/NoSQL databases.

• Full Stack Developer with 8+ years of experience specializing in JavaScript/TypeScript, React, Next.js, Angular, Node.js (Express, NestJS), and cloud platforms AWS & Azure.
• Proficient in designing scalable architectures, REST & real-time APIs (Socket.IO), and working with RDBMS (PostgreSQL, MySQL) and NoSQL (MongoDB).
• Strong background in Computer Science (Master’s degree) with expertise in OOP, design patterns, UML, and SDLC including Agile and TDD methodologies.

• Full Stack Developer with 5+ years of experience in designing and scaling AI-driven and cloud-native web applications using Node.js, NestJS, Angular, and TypeScript.
• Expertise in system architecture design, RESTful API integration, and optimizing performance across SQL/NoSQL databases including PostgreSQL, MySQL, MongoDB, and Redis.

• Full-Stack Developer with 7+ years of experience specializing in Angular, Node.js, and .NET, delivering scalable web applications in healthcare, support platforms.
• Proficient in frontend frameworks (Angular, React), backend development (Node.js, .NET), and API design, with strong skills in TypeScript, RxJS, and UI/UX tools (Figma, Balsamiq).
• Experienced in Agile methodologies, code reviews, unit testing (Jasmine, Karma), and CI/CD practices, ensuring high-quality, maintainable, and testable code.