Full-Stack Engineer (TypeScript - Next.js / NestJS)

Idlen Inc.; Paris; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Equity package

Founding team member

Office in central Paris

Alan health insurance

MacBook laptop

Direct collaboration with founders

Job summary

Idlen Inc. is hiring our first Full-Stack Engineer to build the core of the GetMint platform—from web app to backend APIs and AI-driven workflows. You’ll work with the CTO and Product team to ship features end-to-end and deliver a fast, reliable experience for global enterprise customers.

Join the founding team in Paris, contribute to architecture decisions, own meaningful product areas, and help shape a growing AI-powered platform with strong ownership from day one.

Qualifications

• Proven experience with TypeScript in full-stack development.
• Strong knowledge of Next.js, React, Tailwind, and NestJS.
• Solid understanding of REST APIs, state management, and middleware.
• Commitment to high-quality code, tests, and documentation.
• Product-minded with the ability to ship fast and scalable code.

Responsibilities

• Build and maintain the front-end (Next.js, React, Tailwind) and back-end (NestJS, TypeScript).
• Develop and scale core product features, dashboards, APIs, and data workflows.
• Integrate AI/LLM features (pipelines, prompts, model evaluations, SDKs).
• Contribute to architecture decisions: API design, data structures, performance, security.
• Ship fast with clean code, clear PRs, and strong testing discipline.
• Improve developer experience, tooling, and internal conventions.
• Maintain a reliable backend with strong logging, monitoring, and uptime.
• Work closely with Product to understand the 'why', not just the 'what'.

Skills

TypeScript

Next.js

React

Tailwind

NestJS

REST APIs

State management

Middleware

Auth flows

Testing

Architecture

Product mindset

Tools

Docker

OpenAI

Anthropic

Vercel AI SDK

Embeddings

Pipelines

Job description

As we’re building our founding team, we’re looking for someone who wants to be part of an exceptional journey with a strong team cohesion. We work primarily from the office to move fast together, while keeping occasional remote days possible when needed.

We’re hiring our first Full-Stack Engineer to build the core of the GetMint platform - from our web app to backend APIs to AI-driven workflows.

You’ll work directly with the CTO and Product team to ship features end-to-end, improve architecture, and deliver a fast, reliable, beautifully crafted experience for global enterprise customers.

What you'll do

• Build and maintain the front-end (Next.js, React, Tailwind) and back-end (NestJS, TypeScript)

• Develop and scale core product features, dashboards, APIs, and data workflows

• Integrate AI/LLM features (pipelines, prompts, model evaluations, SDKs)

• Contribute to architecture decisions: API design, data structures, performance, security

• Ship fast, with clean code, clear PRs, and strong testing discipline

• Improve developer experience, tooling, and internal conventions

• Maintain a reliable backend with strong logging, monitoring, and uptime

• Work closely with Product to understand the "why", not just the "what"

What we're looking for

• Strong experience in TypeScript, including Next.js, React, Tailwind, and NestJS

• Solid understanding of REST APIs, state management, middleware, auth flows

• High standards for code quality: tests, documentation, clean architecture

• Product mindset: able to understand user needs and make pragmatic decisions

• Ability to ship fast while keeping the codebase scalable and maintainable

Bonus points

• Experience integrating AI/LLM systems (OpenAI, Anthropic, Vercel AI SDK, embeddings, pipelines)

• Light DevOps experience (Docker, environments, monitoring)

• Experience in high-velocity startups or early-stage teams

What we offer

• Founding team member

  • Equity package

  • First role in your area at GetMint

  • Direct collaboration with founders on your area of excellence

  • Strong ownership and high-impact role shaping a global category from day one

• Heart of AI transformation

  • Your daily work is impacted by frontier labs' product and monetization strategy, no better place to keep track of Google, Open AI, Anthropic, etc. movements

  • AI workflows integration in your daily work - access to tools and internal AI deployment experts

  • AI training included for

• All basics: office in central Paris, Alan health insurance, MacBook laptop, etc.