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Andreas KaterAK

Andreas Kater

Senior Full-Stack Engineer — Node.js, React, TypeS

£656/day
London, GB
8-15 years

Average response time: 1 hour

About Andreas

Senior full-stack engineer with 10+ years of experience building production systems with Node.js, React, TypeScript and Google Cloud — specialised in AI voice agents and LLM platforms.

As founder and lead engineer of Wakeflow (London), I lead every client engagement hands-on: AI voice agents that answer real phone calls (Twilio Media Streams, OpenAI Realtime API, ElevenLabs), a legacy ERP modernised onto React/Node.js on Google Cloud Run, and CRM, payroll and workflow-automation platforms delivered end to end.

Certified Google Cloud Professional Cloud Developer. Previously delivered engagements via Toptal for US and Dubai clients — a WebRTC robot-fleet control platform with live video streaming, and a client-facing API rebuilt with a thorough testing pipeline, API documentation and JSON-schema validation.

What you can expect: senior-level ownership from architecture to deployment, pragmatic delivery in small fast iterations, and clear communication in English, German or French.
  • English

    Native or bilingual

  • German

    Native or bilingual

  • French

    Fluent

Remote only
Primarily works remotely

Experience

  • wakeflow
    Founder
    August 2020 - Today (6 years)
    London, UK
    Wakeflow is a London tech consultancy specialising in workflow automation and AI — I act as lead engineer on every client engagement.

    Highlights: AI voice agents answering real phone calls (Twilio Media Streams, OpenAI Realtime API, ElevenLabs) · legacy ERP modernised onto React/Node.js on Google Cloud Run · CRM, payroll and workflow-automation platforms delivered end to end · LLM document pipelines with structured extraction.

    Day-to-day stack: Node.js, React, TypeScript, PostgreSQL, Firebase, Google Cloud Platform, Docker, CI/CD.
    Node.js Docker Google cloud Typescript React.js
  • Toptal
    Senior Fullstack Developer
    September 2018 - Today (7 years and 11 months)
    London, UK
    Senior full-stack engineer in the Toptal network, delivering engagements for US and international clients.

    Revcontent (US, 2020–2021): rebuilt the client-facing API with a thorough testing pipeline, API documentation and JSON-schema input validation using Node.js; rebuilt the front end on the new API with React, cutting complexity and load times; introduced a shared Bit component library; managed a small team of 1–5 people.

    Dar Al Nukhbah Electronics (Dubai, 2022): built the front end of a robotic fleet-management platform featuring live WebRTC video streaming with joystick-based remote control in the browser, plus a custom Google Maps fleet view for tracking robots across Dubai. Stack: React, TypeScript.
    React.js Node.js Typescript WebRTC
  • Entrepreneur First
    EF Cohort Member
    April 2020 - July 2020 (3 months)
    London, UK
    Member of the Entrepreneur First London cohort — Europe's leading talent investor programme. Explored and validated startup ideas in the workflow-automation space; the work led directly to founding Wakeflow, where I remain founder and lead engineer today.

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Education

  • MBA
    INSEAD
    MBA
  • Master of Science
    The London School of Economics and Political Science (LSE)
    2010
    Master of Science (MSc), Management and Strategy

Certifications

Skill set

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