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Available for work · London, United Kingdom

OmarAlhasan

Senior Full-Stack Software Engineer. I build scalable web and mobile products — React and Next.js front-ends, React Native apps, and the Node.js APIs behind them.

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Portrait of Omar Alhasan
who's writing

Portrait of Omar Alhasan

Omar Alhasan

Senior Full-Stack Software Engineer

Senior Full-Stack Software Engineer with 7+ years owning production web and mobile products end to end. React, Next.js and TypeScript front-ends on Node.js, GraphQL and PostgreSQL APIs, deployed to AWS with Docker, Kubernetes and CI/CD. Measurable impact: 50% faster platform performance, 35% lower API latency, and 25% faster team delivery through architecture leadership and mentoring.

London, United KingdomEmailLinkedInGitHub
the short version

Six things I get hired for. The first two are where most of the value lands.

  • Scalable Product Development

    Build scalable web and mobile products with clean architecture and reliable delivery pipelines.

  • Full-Stack Ownership

    Own end-to-end delivery from system design through development, testing, and production deployment.

  • Architecture Leadership

    Lead architecture discussions and mentor engineers to improve velocity, quality, and maintainability.

  • API & Data Systems

    Design and integrate REST and GraphQL APIs with robust data layers across PostgreSQL, MongoDB, and SQLite.

  • Quality Engineering

    Ship stable releases through automated testing, QA discipline, and strong engineering standards.

  • User-Centered UX

    Create performant, intuitive user experiences through thoughtful product and UI/UX collaboration.

where I've been

Five years across B2B platforms, fintech and consumer apps — mostly as the person who owns the thing end to end.

202405NOW

Fersan Capital

Senior Software Engineer · Remote (UK)

  • Built and maintained B2B platforms for health centers and social media clients.
  • Led architecture discussions and mentored junior developers, boosting delivery speed by 25%.
  • Developed full-stack web and mobile apps using React, React Native, Node.js, MongoDB, and SQLite.
  • Collaborated closely with product, design, and backend teams to deliver scalable, high-impact features under tight timelines.
  • Delivered 90% bug-free releases through rigorous QA and automated testing.

React · Next.js · React Native · Node.js · TypeScript · MongoDB · SQLite · AWS Lambda · Docker · Kubernetes · GitHub Actions

90%bug-free releases
202304202405

Herrontech

Senior Software Engineer · Canada (Remote)

  • Delivered end-to-end B2B features with full ownership from system design through development, testing, and production deployment, improving delivery speed by 50%.
  • Built and integrated AI-based face detection and liveness verification, improving identity validation and reducing fraud risk.
  • Designed scalable and maintainable frontend/backend architecture with strong performance and reliability.
  • Integrated REST and GraphQL APIs with real-time data pipelines.

React · Node.js · TypeScript · GraphQL · REST APIs · WebSockets · Microservices · Event-Driven Architecture

+50%delivery speed
202008202304

Collar

Full-Stack Software Engineer · London, UK

  • Rebuilt React Native and web platforms, improving performance by 50%.
  • Collaborated with the CTO to redesign backend architecture, reducing API latency by 35%.
  • Implemented E2E testing and internationalization, reducing regression bugs by 40%.
  • Developed secure payment workflows with Stripe and Firebase.
  • Migrated legacy code to a modern stack using React, Redux, GraphQL, and Apollo.

React · React Native · Redux · GraphQL · Apollo · PostgreSQL · Firebase · Stripe · E2E Testing

-35%API latency
201811202008

Mikroelektron

Software Engineer · Remote

  • Built internal automation dashboards with Node.js and PostgreSQL, reducing manual tasks by 60%.
  • Optimized firmware tools and improved monitoring speed.

Node.js · PostgreSQL · SQL · Automation Dashboards

-60%manual work
things I've built

Side work, mostly — an AI agent, a 3D museum, and some earlier things. The second one is the site you're reading.

how I got here

  • 2019-10 → 2020-04

    Front-end / Back-end Engineering Bootcamps

    Engineering Bootcamp Programs

    JavaScript, TypeScript, Node.js, Data Structures & Algorithms, React, React Native, GraphQL, PostgreSQL, Gatsby, RESTful APIs, Web Design

  • Completed 2026-01

    BSc, Software Engineering

    Istanbul Gelisim University

    Cyber Security, Data Structures and Algorithms, Object-Oriented Programming, Statistical Analysis, Web Development, Database Management, Computer Networks, Software Architecture, Mobile Application Development, AI Fundamentals, System Design Principles

    React + Node.js academic dashboard

the paperwork

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Stack

TypeScriptReactNext.jsReact NativeNode.jsPythonGraphQLREST APIsExpressNestJSFastAPIPostgreSQLMongoDBMySQLRedisSQLiteFirebaseAWS
AWS LambdaDockerKubernetesCI/CDGitHub ActionsMicroservicesEvent-Driven ArchitectureWebSocketsReduxApollo ClientTailwindCSSStyled-ComponentsThree.jsJestE2E TestingSystem DesignData Structures & Algorithms

Languages

English (Fluent) · Arabic (Native) · Turkish (Intermediate)

Into

Product Design · UI/UX · Machine Learning · Building Scalable Products · Business Strategy

things people ask

  • I specialize in modern full-stack development. Web: React, Next.js, TypeScript, Tailwind CSS, and Framer Motion. Mobile: React Native, shipping cross-platform iOS and Android apps. Backend: Node.js, Express, GraphQL, and databases like PostgreSQL, MongoDB, and SQLite. I'm always learning and adapting to project needs.

say hello

Best way to reach me

omaralhasan650@gmail.com
London, United Kingdom+44 7468 362835LinkedInGitHub