Senior Frontend Developer

1 week ago Be among the first 25 applicants About The Role We are looking for a highly skilled Senior Frontend 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 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 Frontend (your Focus) Next.js (App Router) with React Server Components Tailwind CSS with custom design tokens Shadcn/Radix UI for accessible, composable components Apollo Client with cache management and optimistic updates React Hook Form for complex form handling TanStack Table/Virtual for high-performance data grids Storybook for component documentation and visual testing Playwright for E2E testing Backend (context) GraphQL Yoga + Nexus (type-safe schema generation) PostgreSQL & Redis BullMQ for job queues API Layer GraphQL (client-facing) with Apollo Client REST (admin-facing) with Zod schemas Cloud Infrastructure Google Cloud Platform (Cloud Run, GCS) Container-based deployments Observability 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 Bespoke Fit Technical Skills 5+ years building frontend TypeScript applications Strong experience with React and Next.js (App Router) Proficiency with Tailwind CSS and component libraries (Shadcn, Radix UI) Experience with GraphQL clients (Apollo Client preferred) Understanding of design systems and Storybook Plus: Experience with data visualization and high-performance UIs Bonus: Experience with fintech or complex financial dashboards Mindset 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 Interest: You have a genuine interest in angel investment and the venture capital world 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 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. Referrals increase your chances of interviewing at Roundtable by 2x Get notified about new Senior Frontend Developer jobs in Paris, Île-de-France, France. Seniority level: Mid‑Senior level Employment type: Full‑time Job function: Other Industries: IT Services and IT Consulting #J-18808-Ljbffr