Senior Full-stack Developer

We are looking for a highly skilled Senior Full-Stack Developer to join our tech team. As collaborative building is at the core of how we operate – not just within the engineering team but across all departments. We are developing a platform that offers an incredible opportunity to co-invest in the Private Equity sector. To achieve our vision, we need to establish both a premium brand and platform. Responsibilities Collaborating closely with the team on product strategy, assessing the effort required for various features, and making key technical decisions. Supporting the overall decision‑making process and the company’s sustained growth. Developing, deploying, and maintaining new features. Conducting code reviews and facilitating knowledge sharing within the team. Participating in the decision‑making for architecture and technology choices. What you’ll work on Cap table engine: Build systems that track ownership across thousands of investors with cent‑level precision. Multi‑country compliance: Implement investor qualification rules and regulatory workflows across jurisdictions. Multi‑asset platform: Extend the platform to support diverse asset classes and investment structures. Financial operations: Design robust workflows for complex financial transactions and fund operations. Real‑time dashboards: Create a high‑performance investor platform with live portfolio valuations. Document automation: Generate legal documents (subscription agreements, shareholder reports) from dynamic templates. Security: Protect sensitive financial data with robust authentication, authorization, and encryption. Technical challenges Precision at scale: Engines compute fractional ownership across thousands of investors; rounding errors must cascade correctly. Complex financial state machines: Operations involve coordinated updates across multiple entities and ledger entries; state transitions must be atomic and auditable. Multi‑jurisdiction compliance: Different countries have different regulatory requirements; system must enforce rules programmatically while remaining flexible. Historical reconstruction: Auditors need to see data at any point in time; architecture supports point‑in‑time queries tied to specific operations. Domain complexity: Model sophisticated financial instruments and multi‑currency valuations with type safety. Overall tech stack Type Safety: 100% TypeScript across the entire stack (frontend, backend, shared libraries). Quality Assurance: Vitest for unit and integration testing. Playwright for E2E testing. Biome for linting and formatting. Zod for runtime validation at all system boundaries. Architecture: pnpm workspace monorepo with Turborepo for build orchestration. Domain‑Driven Design with 20+ shared domain libraries. Application Layer: Frontend: Next.js (App Router), Tailwind, Shadcn. Backend: GraphQL Yoga + Nexus (type‑safe schema generation). Database: PostgreSQL & Redis. Job Queue: BullMQ with Redis. Design System: Figma & Storybook. API Layer: GraphQL (client‑facing) with Apollo Client. REST (admin‑facing) with Zod schemas via lib/api‑schemas. Cloud Infrastructure: Google Cloud Platform (Cloud Run, GCS). Container‑based deployments. Observability: OpenTelemetry for distributed tracing. Datadog for monitoring (browser + server). Sentry for error tracking. AI Integration: OpenAnthropic‑powered document analysis and data extraction pipelines. Engineering culture Domain‑Driven Design: coherent domains with clear boundaries. Strict TypeScript: no any types, Zod validation at all boundaries. Observability‑first: Datadog + OpenTelemetry + Sentry from day one. Code review culture: every PR gets thoughtful review. AI‑assisted development: leverage AI tools while keeping humans in the loop for all decisions. Qualifications Technical skills: 5+ years building full‑stack TypeScript applications. Comfortable with PostgreSQL and ORMs (Prisma preferred). Understanding of financial calculations and decimal precision. Experience with GraphQL (Apollo, Yoga, or similar). Bonus: experience with fintech, regulatory compliance, or cap table management. Mindset: Care about correctness – bugs in financial systems have real consequences. Enjoy domain complexity and learning new business concepts. Prefer clean architecture over quick hacks. Communicate clearly with non‑technical stakeholders. Have a genuine interest in angel investment and the venture capital world. Thriving in fast‑paced environments with broad responsibilities. Doer with a bias for action; no task is below you. Prioritize and split tasks efficiently. Team player who enjoys sharing and learning from each other. Propose improvements and challenge assumptions constructively. Understanding of product and eager to deliver the best possible UX. Systems thinking – able to step back and rethink our model globally. Strong attention to detail – set a high bar for code quality. Benefits Front‑row seat in a fast‑growing startup shaping the future of investment operations (ranked 14th in the Sifted 250). Quality‑driven environment. Awesome colleagues with high ambitions. Culture of ownership, collaboration, learning and growth. Beautiful offices in central Paris, Toulouse and Luxembourg – flexible remote options. Competitive compensation (including employee stock options plan). Time off: 25 days of holidays + RTT days. Health insurance: Mutuelle Alan (50% covered by the company). Meals: Restaurant card with partner Swile (10€ per workday). Tools: A MacBook is our standard working tool. Transportation: Forfait Mobilité Douce (540 € /year). Interview Process First interview with our Talent Recruiter. Second interview with Simon, our Founder & CTO. Case study with a tech team member. Cultural fit interview with another founder. Equal Opportunity Roundtable is committed to creating a diverse environment. All qualified applicants will receive consideration for employment irrespective of gender, origins, identity, background, and orientations. We encourage all applicants, especially those from underrepresented groups, to apply for our open positions. We believe that diversity, equity and inclusion are fundamental pillars. #J-18808-Ljbffr