Hire Vetted Web Application Engineers at Upstaff - Page 3

• 7+ years in backend and frontend development with expertise in .NET, Azure, and microservices architecture.
• Cloud & DevOps: AWS, Kubernetes (EKS), GitLab CI/CD, Docker, Kafka, Helm, Ingress, Nginx
• Front-End: React and Angular
• Recently lead/Tech-lead roles. Background in architecture design, team leadership, and delivering complex enterprise solutions.

• Expertise in microservices, event-driven, and service-oriented architectures with strong focus on scalable, maintainable system design.
• Proficient in PHP, Node.js, Python, Golang; developed AI-powered financial portals and algorithmic trading systems.
• Skilled in full-stack development using React, Vue.js, Next.js, and Nuxt.js with REST and WebSocket APIs.
• Experienced in DevOps: Docker, CI/CD pipelines, Linux server administration, and automated deployments.
• Delivered complex projects including VIP online gaming platforms, AI automation systems, and financial APIs integration.

• Senior Software Engineer with 15+ years of experience building web applications and distributed systems with Python and JS/TS. Recent work includes AI agents, LLM workflows, streaming speech recognition, semantic retrieval, and multimodal search.
• 12 years of combined experience with Python, including Django, FastAPI, Kafka, RabbitMQ, PostgreSQL, Redis, and OpenSearch.
• JavaScript: React and Vue.JS (since 2019).
• Computer Science Diploma, National Technical University of Ukraine, Kyiv
• Developed multimodal computer vision pipelines and vector-based semantic search integrating DINO, CLIP, MagFace, and LangChain.

• Senior Full Stack Developer with 7+ years in enterprise and FinTech, specializing in React.js, Next.js, React Native, Node.js, Python, and FastAPI.
• Led scalable cross-platform apps and reusable component libraries, improving development efficiency and consistency.
• Expertise in AI-powered automation using LangChain, LangGraph, OpenAI API, and RAG for workflow optimization.
• Proven track record in agile environments, managing CI/CD pipelines, sprint planning, and cross-regional collaboration.
• Strong backend skills with PostgreSQL, MongoDB, REST APIs, WebSockets, and cloud platforms including AWS and Alibaba Cloud.

• Senior Full-Stack AI Engineer with 6+ years in Python, TypeScript, React, Next.js, FastAPI, PostgreSQL, and AWS.
• Expertise in LLM-based systems including RAG, semantic search, embeddings, and AI-powered document intelligence.
• Delivered 20+ REST/AI APIs, 15+ React/Next.js modules, and deployed 6+ production environments with CI/CD and Docker.
• Led AI platform development processing 1M+ pages and multimodal data ingestion for enterprise knowledge retrieval.
• Computer Science graduate with proven impact on AI hyper-personalization and large-scale SaaS platforms.

Senior Full Stack Engineer with 10+ years of experience building scalable SaaS and eCommerce platforms. Strong in TypeScript, Python, C#/.NET, Java, React, cloud-native microservices, AWS/GCP, Docker, and Kubernetes. Experienced in production AI systems using LLMs, RAG, and semantic search.

• Full Stack Engineer with 6 years of experience specializing in Python backend and Node.js, building scalable APIs and real-time systems.
• Expertise in microservices, event-driven architecture, and asynchronous processing using RabbitMQ, Kafka, and Redis.
• Proficient in React, React Native, and modern frontend frameworks for interactive UI development.
• Skilled in cloud infrastructure (AWS, GCP, Azure), container orchestration (Kubernetes, Docker), and CI/CD automation.
• Strong background in testing (Jest, Supertest), code quality, security best practices, and Agile methodologies.

• Full stack engineer with expertise in React.js, RESTful APIs, and microservices architecture, delivering scalable and maintainable healthcare and web solutions.
• Accelerated form delivery frequency by 7x through reusable component development and refactored legacy systems to modular microservices.
• Modernized WordPress platforms using Astro, React, and Strapi, reducing load times by over 50% across devices.
• Skilled in frontend performance optimization, state management (Redux, Context API), and accessibility compliance.
• Background in Mechatronics Engineering with strong proficiency in JavaScript, TypeScript, and software maintainability best practices.

• Experienced Java Developer with 7+ years at Lufthansa Industry Solutions, specializing in Spring Boot and .NET Framework.
• Proficient in ASP.NET MVC and software architecture principles, holding a Certified Professional for Software Architecture Foundation Level certification.
• Strong engineering background with a Bachelor's degree in Information Technology from Universiteti i Tiranës.
• Demonstrated ability to deliver scalable enterprise solutions following best practices and design patterns.
• Hands-on experience in banking and industry domains, contributing to robust software development and system integration projects.

• Senior software and business systems consultant with 8+ years delivering Java/Spring backends and React, Angular and TypeScript frontends across enterprise, product and outsourcing environments.
• Connects business requirements with system design, integrations, implementation, deployment and production support for SaaS, ERP/back-office, fintech and IoT work.
• Hands-on with secure REST APIs, OAuth2/JWT, PostgreSQL, Docker, CI/CD, MQTT, automated testing and production diagnostics.

Works directly with owners, managers, product, operations, marketing, sales and engineering teams; coordinates delivery, supports international stakeholders and mentors developers.

• Engineer with 15+ years in backend and full-stack development, specializing in scalable, high-load system architectures.
• Expertise in NodeJS, PHP (Symfony, Zend), and databases including PostgreSQL, MongoDB, and MySQL.
• Led development teams, conducted code reviews, and designed enterprise-grade backend solutions.
• Proficient in REST API, GraphQL, messaging systems (RabbitMQ, Kafka), and cloud-native tools like Docker and Kubernetes.
• Strong foundation in OOP, design patterns, TDD, BDD, and Agile methodologies, supported by a Master’s in Software for Automated Systems.

• Engineer with 15+ years in backend and full-stack development, specializing in scalable, high-load system architectures.
• Proficient in NodeJS, PHP (Symfony, Zend), and databases including PostgreSQL, MongoDB, and MySQL.
• Experienced in leading development teams, performing code reviews, and designing enterprise-grade backend solutions.
• Skilled in REST API, GraphQL, messaging systems (RabbitMQ, Kafka), and cloud-native tools like Docker and Kubernetes.
• Strong foundation in OOP, design patterns, TDD, BDD, and Agile methodologies, supported by a Master’s in Software for Automated Systems.

Developed scalable Node.js/TypeScript backend applications and REST APIs for production environments.

Built modular NestJS services and microservice architectures to support growing application workloads.

Optimized database queries, API performance, and backend processes to improve reliability and response times.

Integrated third-party APIs, authentication systems, caching, and automated deployment workflows.

Improved code maintainability through clean architecture, reusable components, testing, and strong TypeScript practices.

• Software Architect with 10+ years in designing scalable AI-driven backend systems, specializing in Generative AI, LLMs, and RAG pipelines using LangChain and Weaviate.
• Expertise in cloud-native deployments on AWS Bedrock, Azure OpenAI, Kubernetes, and MLOps with CI/CD pipelines using Docker, CircleCI, and GitHub Actions.
• Led architecture and implementation of AI-powered healthcare apps automating IVR call systems and gift card backend platforms with Kafka, Redis, and microservices.
• Skilled in monitoring and observability using Grafana, Prometheus, and OpenTelemetry to maintain production-ready AI systems and ensure high performance.

• Ruby on Rails expert with 4+ years in fintech backend systems processing $2B+ in transfers, skilled in Active Record, Sidekiq, Redis caching.
• Proficient in Solidity smart contract development and security auditing using Slither, Foundry; built 28+ DeFi contracts.
• Experienced in full stack development with React, React Native, Next.js, NestJS, and Hotwire for scalable web and mobile apps.
• Strong CI/CD, automated testing (RSpec, FactoryBot, Playwright), and AI-assisted development using Claude Code, Codex, and RAG pipelines.
• Mathematics degree with top honors, advanced blockchain security certification, and ongoing AI/ML training emphasizing MLOps and scalable pipelines.

• AWS Certified Cloud Practitioner with hands-on experience in Node.js, TypeScript, REST APIs, and AWS services including Lambda, S3, DynamoDB, and EventBridge.
• Proficient in CI/CD pipelines using GitHub Actions and Jenkins, with expertise in automated testing frameworks like Jest for unit and integration testing.
• Developed and deployed scalable cloud-hosted SaaS platforms and backend systems with secure authentication (JWT, Argon2) and infrastructure as code (CloudFormation).
• Strong background in backend development, API design, deployment automation, and production troubleshooting on Linux and AWS EC2 environments.

• Full-Stack Developer skilled in Next.js, React, TypeScript, Node.js, and Prisma with hands-on experience building scalable e-commerce platforms and secure REST APIs.
• Expertise in cybersecurity tools including web vulnerability and malware scanners, emphasizing security-focused software development.
• Proficient in backend technologies: Express, MongoDB, JWT, NextAuth, and frontend styling with Tailwind CSS.
• Experienced with Linux environments, Docker, Git, and continuous learning in Web3 integrations like MetaMask, wagmi, and smart contract interaction.
• Certified in Cybersecurity Fundamentals and Cyber Attack basics, combining software engineering with security best practices.

• Engineer with a B.Sc. in Mechatronics Engineering and Full Stack Developer certification, skilled in JavaScript, TypeScript, React, Astro JS, Node.js, and backend services.
• Proven experience in developing high-performance web applications and Shopify apps, focusing on UX and speed optimization.
• Expertise in integrating analytics tools like Segment, Google Analytics, and Facebook Pixel for data-driven marketing and product decisions.
• Strong background in migrating legacy systems to modern stacks and automating data processing with Python scripts.
• Proficient with modern development tools including Git, Docker, Jira, and Figma, ensuring efficient collaboration and deployment.

IMPERIA X | Digital Agency | Founder & Marketing Lead | 2014 - Present

We build websites that sell + traffic that brings clients.

12 years experience. 50+ projects. In-house team: Developers, SEO, PPC, SMM, Designers.

SERVICES:

- Website Development: Corporate sites, Landing Pages, E-commerce, Web Apps

- Paid Traffic: Google Ads, Meta Ads, Context

- Growth: SEO, SMM, Analytics, CRO

KEY PROJECT:

Beer Brand 379 - Full Launch

- Developed conversion landing page

- Launched Google Ads + Meta Ads

- SEO + Analytics setup

- Goal: First 1000 sales

Case: https://offers.arevian.studio/o/379beer

PORTFOLIO: https://t.me/OfficialImperiaX

Location: Tsaghkadzor, Armenia | Languages: AM, RU, EN, GR

• Senior Full-Stack Developer with 6+ years in C#, ASP.NET Core, .NET 6/8, and Microsoft SQL Server, leading enterprise software modernization and cloud/on-premises deployments.
• Expert in designing resilient RESTful APIs, microservices, and complex SQL Server databases with advanced T-SQL and performance tuning.
• Proven SAP Business One ERP customization using C# add-ons, T-SQL stored procedures, and Crystal Reports for automated reporting.

• Senior Full Stack Engineer with 10+ years in Ruby on Rails and React.js, specializing in scalable microservices and cloud-native architectures.
• Proven expertise in CI/CD pipelines, AWS, Serverless, Terraform, and containerization (Docker, CircleCI) for robust deployment automation.
• Extensive experience designing and optimizing PostgreSQL databases, including complex materialized views and performance tuning.
• Led integrations with multiple third-party APIs (Google Drive, Dropbox, Amazon Translate) and developed event-driven systems using Kafka and RabbitMQ.
• Strong background in Agile methodologies, system design patterns, and cross-team collaboration with international stakeholders.

• Founding design engineer with 6+ years in product design and full-stack delivery specializing in AI-native products and LLM integration.
• Expertise in React, Next.js, TypeScript, Golang, Python, Flutter, Tailwind, and AI tools like OpenAI API, Genkit, and Transformers.js.
• Led AI chat feature at KW Berlin with 4M+ MAU, driving 100-min user sessions and $30k/week projected revenue via A/B testing and MDE analysis.
• Built and launched dramance.app solo, an AI-powered interactive visual novel platform with end-to-end system architecture and monetization design.
• Skilled in design systems (Figma tokens, auto-layout), and UX methodologies including CJM, SUM, and A/B testing with MDE.

• 14+ years in backend systems, Node.js, C/C++, GoLang, and embedded IoT firmware development.
• Developed AI chat product with Stripe payments, search service using LangChain and HuggingFace, and P2P WebRTC/RTMP features.
• Built custom SSH in JavaScript with UDP hole punching for firewall traversal and low-latency distributed systems.
• Rebuilt Solana stack in Node.js; created neural networks in SourcePawn and GoLang with genetic algorithms.
• Led international teams, conducted hundreds of code reviews, and managed hiring and technical training.

• Senior Full Stack Software Engineer with 8+ years in Java, Spring Boot, Angular, and microservices architecture.
• Proficient in cloud-native technologies including Docker, Kubernetes, Apache Kafka, and Keycloak for secure SSO applications.
• Experienced Scrum Master leading cross-functional teams in agile environments across Germany, France, and Tunisia.
• Strong background in database design and management with PostgreSQL, MySQL, and MongoDB.
• Contributed to distributed systems, real-time platforms, and open-source projects using Java 17, Lua, and modern frontend frameworks.

• Experienced Software Engineer specializing in Java Spring Boot, ReactJS, Node.js, and PHP. Skilled in RESTful APIs, database management, AI automation, and enterprise application support. Strong background in troubleshooting, system optimization, and delivering scalable web applications.

• Senior Full Stack Engineer with 5+ years designing scalable TypeScript-first architectures using React, Next.js, and Node.js.
• Expertise in multi-tenant SaaS platforms, API-driven systems, and complex business workflow automation.
• Proven track record in full software lifecycle ownership from architecture to deployment and production support.
• Strong skills in REST API design, database modeling (PostgreSQL, MongoDB), and cloud-native application delivery.
• Experienced in engineering best practices including modular design, reusable components, CI/CD pipelines, and cross-functional collaboration.

Software engineer with experience in fintech and Web3. Built production-ready applications with cryptocurrency exchange integrations to collect and analyze market data. Familiar with both Ethereum or Solana ecosystems and the best security practices.

• Mobile developer with 7+ years in Android, iOS, Xamarin, Flutter, and .Net technologies.
• Experienced in backend API and microservices development using ASP .Net Core and Azure.
• Led architectural design and tech support across multi-platform mobile projects.
• Proficient in Kotlin, .Net 6, Xamarin.Forms, and cross-platform frameworks like MvvmCross.
• Strong foundation in computer science with degrees in Information Systems and Multimedia Web Design.

• Lead Full-Stack Engineer with 12+ years in distributed systems, AI-driven platforms, and payment ecosystems.
• Expert in event-driven microservices, multi-tenant SaaS, and secure fintech transaction processing.
• Proficient in Typescript, Node.js, React, AWS, Kafka, and AI integrations including LLMs and agentic workflows.
• Architected scalable real-time systems with WebSockets and built AI automation for KYC, risk management, and customer support.
• Strong background in system architecture, prompt engineering, and delivering complex, high-load applications in fintech and iGaming domains.

• Full-Stack Software Engineer with 7+ years delivering end-to-end web applications using React, Next.js, Vue, NestJS, Django, and FastAPI.
• Expertise in database schema design and optimization with PostgreSQL, MongoDB, MySQL, and Redis.
• Proven experience integrating LLM APIs (OpenAI, Anthropic, LangChain) and building multi-agent AI automation systems reducing manual workload by 70%.
• Skilled in REST API, OAuth 2.0, JWT authentication, RBAC, multi-tenancy, and event-driven architectures.
• Strong background in DevOps with CI/CD, Docker, Kubernetes, AWS, GCP, and automated testing for scalable deployments.

• Backend engineer with expertise in Scala, Java (17-21), Python, and cloud-native technologies including Kubernetes, Docker, and AWS.
• Proven track record in end-to-end backend development for B2B SaaS platforms, AI content generation, and e-commerce ecosystems.
• Skilled in system design, API development (gRPC/REST), and integration with external partners and SSO solutions.
• Experienced in microservices architecture, event-driven systems using Kafka and RabbitMQ, and database management with , PostgreSQL, MongoDB, and caching strategies.
• Master’s degree candidate in applied mathematics, with strong foundations in software engineering best practices, code quality, and cross-functional collaboration.

• Backend engineer with expertise in Scala, Java (17-21), Python, and cloud-native technologies including Kubernetes, Docker, and AWS.
• Proven track record in end-to-end backend system design, development, deployment, and production support for B2B SaaS and AI-driven projects.
• Skilled in microservices architecture, API design (gRPC/REST), messaging systems (Kafka, RabbitMQ), and database management (PostgreSQL, NoSQL).
• Experienced in CI/CD pipelines, code quality assurance, and cross-functional collaboration to solve complex technical challenges.
• Master’s degree candidate in Applied Mathematics with award-winning problem-solving skills demonstrated by 1st place in Luxoft techground hackathon.