Principal Product Engineer managing frontend architecture for AI - augmented engineering tools at Flux. Driving performance strategy and mentoring senior engineers within the hybrid work environment.
About the role
- Full Stack Developer utilizing TypeScript stack at a startup revolutionizing career platforms. Building features, migrating legacy code, and shaping software architecture in a collaborative environment.
Responsibilities
- Build end-to-end features in our TypeScript monorepo (Next.js frontend + NestJS backend + LangGraphJS agents)
- Migrate legacy PHP/Symfony code to modern TypeScript, focusing on refactoring rather than rewriting from scratch
- Maintain and debug existing systems across the full stack
- Write tests (Vitest, Playwright) and participate in code reviews to ensure quality
- Collaborate through pair programming and contribute ideas to improve our processes, tooling, and engineering practices
- Own your work end-to-end, from database design to API contracts to UI implementation
Requirements
- Experience with React, React Router, Next.js, Vue/Nuxt, or similar frameworks
- Strong TypeScript knowledge
- Familiarity with Tailwind CSS
- Proven Node.js + TypeScript experience
- Experience with NestJS, Express, Fastify, or similar frameworks
- Experience designing RESTful APIs
- Understanding of database design and ORMs (MySQL/PostgreSQL)
- Bonus points for experience with:
- • Willingness to refactor PHP into TypeScript (we'll support you)
- • Docker & Docker Compose for local development
- • Git & GitHub workflows, CI/CD (GitHub Actions)
- • Monorepo architectures (Turborepo/pnpm)
- • LangGraphJS / AI agent development (LangChain ecosystem)
- • AWS (SQS, RDS, S3, ECS)
- • Testing tools and mindset (Vitest, Playwright, etc.)
- • Multi-tenant systems
Benefits
- Real ownership: Your ideas and contributions directly shape the product
- Small team: Direct impact, minimal bureaucracy, fast decision-making
- Modern stack: Work with cutting-edge tools (Next.js 15, LangGraphJS, AI agents)
- VSOP option: Share in the company’s success through virtual stock options
- Modern equipment: Top-tier gear, including a MacBook Pro
- Central office: City-center location with air conditioning and excellent infrastructure
- Quality coffee & team events: Portafilter coffee machine, regular team dinners and events
- Hybrid work model: Flexible mix of remote and in-office work
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