Senior Frontend Developer (M/F)

Roundtable; À distance; EUR 50 000 - 70 000; Plein temps

Résumé du poste

A leading tech firm based in Île-de-France seeks a Senior Frontend Developer to join their growing team. You will develop a cutting-edge platform focusing on Private Equity, work collaboratively across departments, and face unique challenges regarding financial data. The ideal candidate will have solid experience in TypeScript and React. This role is an exciting opportunity to work on crucial features, including a cap table engine and real-time dashboards, all while maintaining high standards of code quality.

Prestations

Flexible working hours

Remote work opportunities

Health and wellness benefits

Qualifications

• Extensive experience in building applications using TypeScript and React.
• Strong knowledge of frontend frameworks like Next.js.
• Familiarity with cloud infrastructure and observability tools.

Responsabilités

• Collaborate on product strategy and technical decisions.
• Develop, deploy, and maintain new features.
• Conduct code reviews and share knowledge across the team.

Connaissances

TypeScript

React

Next.js

Tailwind CSS

GraphQL

Playwright

Data observability

Outils

Vitest

Zod

PostgreSQL

Redis

Description du poste

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.

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

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

• 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