Senior Backend Developer (M/F)
RoundtableFrance1 day ago
Full-timeRemote FriendlyOther
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About The Role
We are looking for a highly skilled Senior Backend 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:
We handle sensitive financial data, which presents us with unique 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
Engineering culture
Technical Skills
Entrepreneurial mindset: You thrive in fast-paced environments where you have broad responsibilities
Ownership mentality: You are a doer and have a bias for action, no task is below you
Organization skills: You know how to prioritize and split your tasks efficiently
Team player: You enjoy sharing and learning from each other
Initiative and innovation: You propose improvements and challenge assumptions constructively
Product lover: You fully understand what we want to bring to our users, and you are eager to deliver the best possible UX to them
Systems thinking: You are able to step back and rethink our model globally
Strong attention to details: Code quality is important for you and you set a high bar
What we offer
We are looking for a highly skilled Senior Backend 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
- 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
We handle sensitive financial data, which presents us with unique 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
- pnpm workspace monorepo with Turborepo for build orchestration
- Domain-Driven Design with 20+ shared domain libraries
- GraphQL Yoga + Nexus for type-safe schema generation
- PostgreSQL with Prisma ORM (migrations, transactions, type-safe queries)
- Redis for caching and pub/sub
- BullMQ for job queues with Bull Board admin UI
- Zod for runtime validation at all API boundaries
- Domain-Driven Design with shared domain libraries
- OpenTelemetry for distributed tracing
- GCP Cloud Run for container deployments
- Next.js (App Router), Tailwind, Shadcn
- Apollo Client for GraphQL
- GraphQL (client-facing) with type-safe resolvers
- REST (admin-facing) with Zod schemas via lib/api-schemas
- Google Cloud Platform (Cloud Run, GCS)
- Container-based deployments
- OpenTelemetry for distributed tracing
- Datadog for monitoring (browser + server)
- Sentry for error tracking
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
Technical Skills
- 5+ years building backend TypeScript/Node.js applications
- Strong experience with PostgreSQL and ORMs (Prisma preferred)
- Proficiency with GraphQL server development (Yoga, Nexus, or similar)
- Experience with job queues and async processing (BullMQ, Redis)
- Understanding of financial calculations and decimal precision
- Plus: Experience with REST API design and OpenAPI/Zod schemas
- Bonus: Experience with fintech, regulatory compliance, or audit trails
- You care about correctness-bugs in financial systems have real consequences
- You enjoy domain complexity and learning new business concepts
- You prefer clean architecture over quick hacks
- You communicate clearly with non-technical stakeholders
Entrepreneurial mindset: You thrive in fast-paced environments where you have broad responsibilities
Ownership mentality: You are a doer and have a bias for action, no task is below you
Organization skills: You know how to prioritize and split your tasks efficiently
Team player: You enjoy sharing and learning from each other
Initiative and innovation: You propose improvements and challenge assumptions constructively
Product lover: You fully understand what we want to bring to our users, and you are eager to deliver the best possible UX to them
Systems thinking: You are able to step back and rethink our model globally
Strong attention to details: Code quality is important for you and you set a high bar
What we offer
- A front-row seat in a fast-growing startup shaping the future of investment operations - ranked 14th in the Sifted 250, which highlights Europe’s 250 startups with the highest percentage revenue growth over the past three years
- A quality-driven environment
- Awesome colleagues with high ambitions
- A culture of ownership, collaboration, learning and growth
- Beautiful offices in central Paris, Toulouseand Luxembourg + flexible remote options for people in other countries
- Competitive compensation (including an employee stock options plan)
- Other perks / terms and conditions :
- Time off: 25 days of holidays + RTT days
- Health insurance: Mutuelle Alan (50% covered by the company)
- Meals: A restaurant card with our partner Swile (10€ per workday)
- Tools: A MacBook is our standard working tool
- Transportation: Forfait Mobilité Douce (540€ /year)
- First interview with our Talent Recruiter
- Second interview with Simon, our Founder & CTO
- Case study with a tech team member
- Cultural fit with another founder
Key Skills
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