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I love to teach what I know. I think I can explain things easily with examples. I have been working as a Software Engineer for the last 5 years and have worked with some of the world's most reputed companies like **Open AI, Scale AI, Doloras Lab**, etc as a freelancer.
Full-stack software craftsman and technical leader with over 15 years of experience. Equally adept at system design, programming, technical leadership, mentorship, and business collaboration. Have a wide breadth of technical experience, but specialize in backend API development, relational databases, and web applications. Passionate about simplicity and efficiency. I have worked at over a dozen companies large and small, in a handful of different domains. Also participated in hundreds of interviews, about half-and-half as the interviewer and the interviewee. I have given dozens of talks and training sessions on a variety of topics, mostly focusing on distributed systems, caching, and testing. My top skills are Java, SQL, testing, and refactoring. I have experience with formal academic and professional mentorship, and would love to help you skill up, solve a problem, or just nerd out with you today!
I'm a skilled developer in a large number of different computer specialties. Can do everything from building and installing servers to programming in more languages than you probably knew exist.
**I'm Karan, a Senior Mobile Engineer with 9+ years of experience designing and delivering scalable, production-grade mobile applications across iOS and cross-platform ecosystems. I've successfully shipped 50+ applications spanning healthcare, fintech, social networking, education, travel, staffing, AI, and enterprise platforms.** **My expertise includes Swift, SwiftUI, React Native, Flutter, Firebase, Supabase, JavaScript, Node.js, and REST APIs, with extensive experience building cloud-connected mobile systems, scalable backend integrations, and high-performance user experiences.** **I have strong experience developing AI-powered applications using OpenAI APIs, OCR pipelines, real-time communication features, push notifications, analytics, secure authentication, payment integrations, and production-ready mobile architectures. I've worked on real-time systems involving WebRTC, WebSockets, Socket.IO, Firebase real-time services, and low-latency communication workflows for modern mobile applications.** I enjoy owning products end-to-end, from architecture and backend integrations to App Store deployment, performance optimization, scalability, and long-term maintenance. I focus on writing clean, maintainable code while delivering reliable applications that perform well in production for startups and enterprise clients. **Senior Mobile Engineer | iOS Developer | Swift & SwiftUI | React Native | Flutter | WebRTC | WebSockets | Socket.IO | Voice & Real-Time Systems | Firebase | Supabase | OpenAI API | AI Integration | REST APIs | OCR | Mobile Architecture | Performance Optimization | App Store Deployment | 50+ Production Apps | 9+ Years Experience**
An accomplished and high-motivated IT professional with 6+ years experience of IT leadership involved in web development, application development and System & Solution Architecture. My main competency is in building rich client-side applications, on both sides back-end and front-end. I strongly believe in TDD as the only way to build a bullet-proof code that makes everyone happy and it allows me to rest at night. Reaching 100% test coverage is my passion. **SKILLS:** ✅ Specialities: Computer Engineering, Software Engineer, Web Development, Mobile development, Open Source ✅ Languages:Ruby(6 years), Javascript(4 years), Nodejs(1 year), Elixir(1 year) ✅ Backend Frameworks: Ruby On Rails(6 years), Phoenix(1 year) ✅ Frontend Frameworks: AngularJS(4 years), ReactJS(2 years) ✅ Relational database:Postgresql(6 years), MySQL(6 years) ✅ NoSql databases:Elasticsearch(4 years), Redis(3 years), MongoDB(3 years) ✅ Other technologies:Rabbitmq, Redux, Universal rendering, HTML, CSS, SCSS, BEM, Docker, AWS, Google Cloud Platform, Webpack, Git, Progressive web apps **LINKS:** https://github.com/mpospelov https://stackoverflow.com/users/2460416/mpospelov https://codementor.io/mpospelov https://www.upwork.com/o/profiles/users/_~0182077648cc549f21/ https://www.toptal.com/resume/mikhail-pospelov
I'm Ammar, a Senior Full-Stack Engineer specializing in building scalable web applications, SaaS platforms, AI-powered products, and backend systems. I work across the entire product lifecycle—from system architecture and database design to backend APIs, modern frontend development, cloud deployment, and production optimization. My primary stack includes JavaScript/TypeScript, Next.js, React, Node.js, PostgreSQL, MySQL, Docker, and modern cloud technologies. I leverage AI-assisted development to significantly accelerate delivery while maintaining clean architecture, scalability, maintainability, and high code quality. This enables teams to ship complex products faster without compromising engineering standards. Beyond development, I have experience mentoring developers through leading coding bootcamps, helping many students launch successful software engineering careers at top technology companies. I'm passionate about solving challenging technical problems and delivering products that create real business value.
Frontend-focused Full-Stack Developer with 6+ years of experience. Strong skills in React (TypeScript), Django (Python), Postgres, InfluxDB Passionate about intuitive UX, performance optimization, and leading initiatives and contributing to innovative start-ups. Self-taught with strong problem-solving skills, always exploring new web technologies to build scalable, high-quality applications.
I taught myself how to program while I was in high school, in an environment with very limited internet access and no guidance. Despite all of this, I fell in love with coding. I'm a generalist working mostly with Scala and web applications.
Senior Software Engineer (10 years experience, ex-Fireblocks) With extensive blockchain expertise and distributed systems experience, I design sophisticated backend systems and AI platforms running in production—in environments where errors are costly: finance, crypto, legal, sensitive data. I help companies: - Reduce infrastructure costs: Cloud audit and optimization (50K$/year saved on AWS for one client), optimized processing pipelines (ingestion cost reduced 7x on latest project) - Build reliable distributed systems: Microservices, real-time high-throughput APIs, event-driven architecture (recent example: price aggregator connected to 10+ providers, latency cut in half) - Accelerate their teams: Architecture, boilerplates, and CI/CD reducing time-to-production (new service onboarding dropped from 2-3 days to 4 hours) - Leverage documents and data with AI: RAG assistants with verifiable citations, OCR and transcription at scale, POC-to-production transitions - Secure and harden existing systems: Server hardening, testing, race condition fixes on critical systems Recent references: Legal AI platform delivered solo end-to-end (65,000+ documents, cited responses in under 40 seconds); Fireblocks DeFi browser extension (lead developer, 2,000+ users, 5.0 on Chrome Web Store). Native French speaker, fluent English. 100% remote, European timezones. Stack: Python, TypeScript/Node.js, NestJS, FastAPI, Blockchain (Solidity, Web3.js, ethers.js), Microservices, RabbitMQ, Kafka, WebSockets, PostgreSQL, Redis, AWS, Docker, Kubernetes, RAG, LLM, Anthropic API (Claude), Qdrant, OCR.
Senior iOS Engineer with 14+ years of experience in iOS development and Software Development across HealthTech, media, eCommerce, and social platforms. Skilled in Swift, SwiftUI, UIKit, Objective-C, concurrency, modular architectures, design patterns, and object-oriented design. Experienced in building and maintaining mobile applications, integrating AI-assisted workflows, and contributing to long-term maintainable codebases. Strong background in continuous integration (CI/CD) and development automation, concurrency, modular architecture, and testing methodologies. Known for an organized and friendly working style, clear communication, and practical problem-solving in cross-functional environments. Distinguished performance assisting over 1000 clients on Codementor.io with average 5.0/5 rating. A proven record of mentoring, training and leading teams. Practical experience with AI-driven and AI-assisted full-stack development.
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