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🇫🇷 Paris, France · 2h ago

Senior Full-stack Developer (M/F)

Roundtable

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About the role:We are looking for a highly skilled Senior Full-Stack Developer to join our tech team.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 decisionsSupporting the overall decision-making process and the company's sustained growthDeveloping, deploying, and maintaining new featuresConducting code reviews and facilitating knowledge sharing within the teamWhat you'll work on: Cap table engine: Build systems that track ownership across thousands of investors with cent-level precisionMulti-country compliance: Implement investor qualification rules and regulatory workflows across jurisdictionsMulti-asset platform: Extend the platform to support diverse asset classes and investment structuresFinancial operations: Design robust workflows for complex financial transactions and fund operationsReal-time dashboards: Create high-performance investor platform with live portfolio valuationsDocument automation: Generate legal documents (subscription agreements, shareholder reports) from dynamic templatesSecurity: Protect sensitive financial data with robust authentication, authorization, and encryptionTechnical challenges: 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 testingPlaywright for E2E testingBiome for linting and formattingZod for runtime validation at all system boundariesArchitecture:pnpm workspace monorepo with Turborepo for build orchestrationDomain-Driven Design with 20+ shared domain librariesApplication Layer:Frontend: Next.js (App Router), Tailwind, ShadcnBackend: TRPC + Nexus (type-safe schema generation)Database: PostgreSQL & RedisJob Queue: BullMQ with RedisDesign System: Figma & StorybookAPI Layer:REST (admin-facing) with Zod schemas via lib/api-schemasCloud Infrastructure:Google Cloud Platform (Cloud Run, GCS)Container-based deploymentsObservability:OpenTelemetry for distributed tracingDatadog for monitoring (browser + server)Sentry for error trackingAI Integration: OpenAnthropic-powered document analysis and data extraction pipelinesEngineering culture: Domain-Driven Design: coherent domains with clear boundariesStrict TypeScript: No any types, Zod validation at all boundariesObservability-first: Datadog + OpenTelemetry + Sentry from day oneCode review culture: Every PR gets thoughtful reviewAI-assisted development: We leverage AI tools (IDE assistants, PR review) to augment engineers while keeping humans in the loop for all decisionsYou're a great match if:Technical skills:5+ years building full-stack TypeScript applicationsUnderstanding of financial calculations and decimal precisionBonus: Experience with fintech, regulatory compliance, or cap table managementMindset:You care about correctness, bugs in financial systems have real consequencesYou enjoy domain complexity and learning new business conceptsYou prefer clean architecture over quick hacksYou communicate clearly with non-technical stakeholdersInterest: You have a genuine interest in angel investment and the venture capital worldEntrepreneurial mindset: You thrive in fast-paced environments where you have broad responsibilitiesOwnership mentality: You are a doer and have a bias for action, no task is below youTeam player: You enjoy sharing and learning from each otherInitiative and innovation: You propose improvements and challenge assumptions constructivelyProduct lover: You fully understand what we want to bring to our users, and you are eager to deliver the best possible UX to themSystems thinking: You are able to step back and rethink our model globallyStrong attention to detail: Code quality is important for you and you set a high barWhat 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 yearsA quality-driven environmentAwesome colleagues with high ambitionsA culture of ownership, collaboration, learning and growthBeautiful offices in central Paris, Toulouse and Luxembourg + flexible remote options for people in other countriesCompetitive compensation (including an employee stock options plan)Other perks / terms and conditions:Time off: 25 days of holidays + RTT daysHealth insurance: Alan mutual health insurance (50% covered by the company)Meals: A restaurant card with our partner Swile (€10 per workday)Tools: A MacBook is our standard working toolTransportation: Sustainable Mobility Package (€600/year)Interview processFirst interview with our Talent RecruiterSecond interview with Simon, our Founder & CTOCase study with a tech team memberCultural fit with another founderRoundtable 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.

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