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Hi, I’m Philipp Veller, an independent full-stack developer with 10 years of experience shipping production-ready web applications as a sole developer or frontend lead. I’ve delivered products across healthcare, legal-tech, renewable energy, and civic participation, including a SaaS hex map editor with Stripe billing and thousands of automated tests, a crane fleet scheduling tool for wind farm projects, and a CE-marked medical platform. My work blends strong frontend engineering with solid backend services, turning complex domains into performant React/TypeScript/Next.js frontends backed by Python or Node.js services. I’m focused on owning delivery end-to-end in contract engagements, emphasizing architecture, robust testing, and maintainable code. I thrive in teams of 2–4 and excel at turning ambiguous requirements into production-ready solutions with clear documentation and smooth handovers to client teams.…Hi, I’m Philipp Veller, an independent full-stack developer with 10 years of experience shipping production-ready web applications as a sole developer or frontend lead. I’ve delivered products across healthcare, legal-tech, renewable energy, and civic participation, including a SaaS hex map editor with Stripe billing and thousands of automated tests, a crane fleet scheduling tool for wind farm projects, and a CE-marked medical platform. My work blends strong frontend engineering with solid backend services, turning complex domains into performant React/TypeScript/Next.js frontends backed by Python or Node.js services. I’m focused on owning delivery end-to-end in contract engagements, emphasizing architecture, robust testing, and maintainable code. I thrive in teams of 2–4 and excel at turning ambiguous requirements into production-ready solutions with clear documentation and smooth handovers to client teams.

Philipp Veller

Full Stack Developer, Front-End Developer, Web Developer, +2

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Hi, I’m Philipp Veller, an independent full-stack developer with 10 years of experience shipping production-ready web applications as a sole developer or frontend lead. I’ve delivered products across healthcare, legal-tech, renewable energy, and civic participation, including a SaaS hex map editor with Stripe billing and thousands of automated tests, a crane fleet scheduling tool for wind farm projects, and a CE-marked medical platform. My work blends strong frontend engineering with solid backend services, turning complex domains into performant React/TypeScript/Next.js frontends backed by Python or Node.js services. I’m focused on owning delivery end-to-end in contract engagements, emphasizing architecture, robust testing, and maintainable code. I thrive in teams of 2–4 and excel at turning ambiguous requirements into production-ready solutions with clear documentation and smooth handovers to client teams.…Hi, I’m Philipp Veller, an independent full-stack developer with 10 years of experience shipping production-ready web applications as a sole developer or frontend lead. I’ve delivered products across healthcare, legal-tech, renewable energy, and civic participation, including a SaaS hex map editor with Stripe billing and thousands of automated tests, a crane fleet scheduling tool for wind farm projects, and a CE-marked medical platform. My work blends strong frontend engineering with solid backend services, turning complex domains into performant React/TypeScript/Next.js frontends backed by Python or Node.js services. I’m focused on owning delivery end-to-end in contract engagements, emphasizing architecture, robust testing, and maintainable code. I thrive in teams of 2–4 and excel at turning ambiguous requirements into production-ready solutions with clear documentation and smooth handovers to client teams.

Available to hire

Hi, I’m Philipp Veller, an independent full-stack developer with 10 years of experience shipping production-ready web applications as a sole developer or frontend lead. I’ve delivered products across healthcare, legal-tech, renewable energy, and civic participation, including a SaaS hex map editor with Stripe billing and thousands of automated tests, a crane fleet scheduling tool for wind farm projects, and a CE-marked medical platform. My work blends strong frontend engineering with solid backend services, turning complex domains into performant React/TypeScript/Next.js frontends backed by Python or Node.js services.

I’m focused on owning delivery end-to-end in contract engagements, emphasizing architecture, robust testing, and maintainable code. I thrive in teams of 2–4 and excel at turning ambiguous requirements into production-ready solutions with clear documentation and smooth handovers to client teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

German

Fluent

English

Fluent

Work Experience

Senior React & Full-Stack Developer (Freelance) at Self-Employed

November 1, 2017 - Present

Delivered full-stack web applications as sole developer or frontend lead in teams of 2–4, owning architecture, implementation, and delivery in React/TypeScript with Next.js and Python/Django/FastAPI backends across 8+ client engagements.

Founder & Solo Developer at Hexer

January 1, 2025 - Present

Hexer is a browser-based hex map editor for tabletop RPGs. Built with Astro 5 SSR, React 18, PixiJS, Zustand; implemented Stripe billing with EU VAT compliance, 7-day trials, and a free/pro tier; implemented real-time multiplayer via SSE and a fog-of-war system; shipped 4,300+ unit tests and 280+ end-to-end tests.

Frontend Developer at Bird Migration Visualization (Client)

December 1, 2025 - January 1, 2026

Built an interactive bird migration visualization using React 19/TypeScript, MapLibre GL, and per-species spatial clustering; optimized data retrieval with GraphQL/Apollo Client, cache-and-network fetch policies, and viewport-based prefetching; delivered as an embeddable web component.

Senior Frontend Developer at Wind Turbine Manufacturer (Client)

August 1, 2025 - March 1, 2026

Owned the frontend for a crane fleet scheduling tool coordinating 35 cranes across 350+ wind farm projects; built with Bryntum Scheduler, custom event models, calendar-week views, and conditional styling for project states; integrated optimization workflow with OR-Tools and implemented enterprise SSO and i18n.

Full-Stack Developer at Legalneer (Legal-Tech AI Platform)

June 1, 2024 - February 1, 2025

Took the product from concept to production SaaS in 8 months as part of a 2–3 person team. Built Next.js frontend, RS256 JWT authentication with social login, role-based permissions, and safety controls. Implemented Stripe subscription billing with usage-based metering and streaming AI responses in the UI.

Full-Stack Developer at PreFree

April 1, 2021 - May 1, 2025

Sole developer for 4+ years on a CE-marked Class IIa medical device; built risk visualization dashboards with Plotly.js, a multi-page clinical form feeding an ML model; implemented GDPR data handling with field-level encryption, TOTP MFA, and audit trails; migrated Django from 3 to 5.1 while preserving backward compatibility.

Technical Lead (Frontend/Performance) at RadioEye, Charité University Hospital

December 1, 2022 - March 1, 2023

Led a four-developer team building a medical image similarity search tool (React 18/TypeScript, Cornerstone.js) integrated into PACS workflow; built component library with Storybook and Jest; delivered a prototype that moved to clinical pilot.

Software Developer (Permanent) at Liquid Democracy e.V.

September 1, 2016 - October 1, 2017

Shipped frontend and backend features for meinBerlin, Berlin’s civic participation platform (40K+ users, 550+ projects) with a Django/React stack and WCAG 2.1 AA accessibility; continued contributing as freelancer through 2025.