Senior Full-stack Developer

Il y a 3 jours

Paris, Nouvelle-Aquitaine, France Roundtable Temps plein 60 000 € - 90 000 € Contrat

About the role

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.

As our tech team continues to scale, you’ll wear many hats. Your responsibilities will include:

  • 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

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 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: Our engines compute fractional ownership across thousands of investors. Rounding errors must cascade correctly - we can’t lose or create cents.

Complex financial state machines: Financial 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. The system must enforce these rules programmatically while remaining flexible.

Historical reconstruction: Auditors need to see data at any point in time. Our architecture supports point-in-time queries tied to specific operations.

Domain complexity: We model sophisticated financial instruments and multi-currency valuations all with type safety.

Overall tech stack

Type Safety: 100% TypeScript across the entire stack (frontend, backend, shared libraries)

Quality Assurance:

  • Vitest for unit/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: TRPC + Nexus (type-safe schema generation)
  • Database: PostgreSQL & Redis
  • Job Queue: BullMQ with Redis
  • Design System: Figma & Storybook

API Layer:

  • 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: We leverage AI tools (IDE assistants, PR review) to augment engineers while keeping humans in the loop for all decisions

You’re a great match if

  • Technical skills: 5+ years building full-stack TypeScript applications
  • Comfortable with PostgreSQL and ORMs (Prisma preferred)
  • Understanding of financial calculations and decimal precision
  • Bonus: Experience with fintech, regulatory compliance, or cap table management
  • Mindset: You care about correctness - bugs in financial systems have real consequences
  • You