Product Engineer
Oliver Broad
I build full-stack mobile platforms for startups — from architecture to App Store.
Based in Heidelberg, Germany
What I do
Mobile Apps
Cross-platform apps with React Native and Expo. From prototype to App Store — iOS, Android, and web from a single codebase.
Backend for Frontend
Type-safe API layers with Next.js and tRPC. Schema validation, caching, and clean separation between client and server.
Architecture & Infrastructure
Monorepo setups, CI/CD pipelines, feature flag systems, and build tooling. Foundations that scale without slowing you down.
Product Thinking
Incremental delivery, migration strategies, and thorough documentation. Ship continuously without breaking what works.
Featured Project
News Aggregation Platform
A multi-market news aggregation platform — React Native mobile app, Next.js backend-for-frontend, and shared component library. Built as sole engineer over 8 months.
- Incremental WebView-to-native migration behind feature flags
- 3 markets (US, Canada, Germany) with full localization
- End-to-end type safety from mobile to BFF with tRPC + Zod
Volunteer Project
Heidelberg Ernährungsrat
Built the website from scratch for Heidelberg's food policy council — a volunteer initiative promoting sustainable, local food systems.
Tech stack
Frontend
- React Native — Cross-platform mobile
- Expo — Managed workflow, OTA updates, EAS builds
- Next.js — App Router, SSR, static export
- TypeScript — Strict mode everywhere
Backend
- Node.js — Server runtime, Express, BFF patterns
- Python / FastAPI — REST APIs, async services
- tRPC + Zod — End-to-end type-safe APIs with runtime validation
- MongoDB — Document store, aggregation pipelines
State & Architecture
- XState — State machines for complex async flows
- Expo Router — File-based navigation
- Turborepo — Monorepo build orchestration
- Feature Flags — Firebase Remote Config + multi-tier
Testing & DevOps
- Jest / Detox — Unit, integration, and E2E mobile testing
- Docker — Containerized dev and CI environments
- AWS / Terraform — Cloud infrastructure, IaC
- GitLab CI / EAS Build — CI/CD pipelines, iOS & Android builds
Experience
Jul 2025 — present
Freelance Product Engineer
Mar 2024 — Aug 2025
Senior Fullstack Engineer
MARKT-PILOT
Sep 2023 — Feb 2024
Senior Software Engineer
Wolters Kluwer
Dec 2021 — Jul 2023
Senior Frontend Developer
Getsafe
Dec 2018 — Nov 2021
Senior Frontend Engineer
Uberall
2018
Senior Software Engineer
Delivery Hero
2017 — 2018
Senior Frontend Developer
Aperto
2014 — 2017
Frontend Developer
Pixelpark, Jurato, dmc
Delivered projects for VW, Daimler, German Ministry of Defense, BAMF, Stiftung Warentest, Pfizer, and mobile.de through agency work.
Let's build something
I'm available for new projects. If you're a startup or scale-up looking for a product engineer, let's talk.