Senior Software Engineer, AI-First (TypeScript/Node.js)

Lefebvre Sdu; Den Haag; Hybrid; EUR 61,000 - 72,000; Full time

Benefits offered by this job

Salary 5,500–6,450 €/mo

4% year-end bonus

Profit sharing up to 6%

23 vacation days

12% personal choice budget

Pension plan

Travel allowance

Bike plan

Two days in The Hague office

Growth opportunities

Job summary

Lefebvre Sdu is building GenIA-L, an AI-first platform for legal and tax knowledge. We seek a Senior Software Engineer to own backend services, including authentication, authorization, and user management, with frontend collaboration as needed. The role centers on robust, scalable Node.js components and API design.

You’ll join a team in The Hague with a hybrid work model, 2 days in the office, and a focus on delivering a high-quality platform used by thousands of professionals across Europe.

Qualifications

• Proficient in TypeScript and Node.js with production experience.
• Strong knowledge of OAuth 2.0 / OIDC and authentication/authorization systems.
• Familiarity with React/Next.js and GraphQL/APollo.
• Experience with relational DBs (Postgres, SQLite, MariaDB) and Redis.

Responsibilities

• Own backend services around authentication and user management.
• Develop and maintain Node.js components, including PDF export and chat delivery via Redis.
• Collaborate with frontend, product owner, and stakeholders to improve stability and scalability.
• Document systems and drive continuous improvement, stabilization, and simplification.

Skills

TypeScript

Node.js

OAuth 2.0 / OIDC

GraphQL / Apollo

Postgres / SQLite / MariaDB

Redis

Docker

CI/CD

AWS / Kubernetes / Helm

Prisma / MikroORM

React / Next.js

Tools

Redis

Docker

GitHub Actions

AWS

Kubernetes

Helm

Prisma

MikroORM

React

Next.js

Job description

Lefebvre Sdu is building GenIA-L, an AI-first platform for legal and tax knowledge. We seek a Senior Software Engineer to own backend services, including authentication, authorization, and user management, with frontend collaboration as needed. The role centers on robust, scalable Node.js components and API design.

You’ll join a team in The Hague with a hybrid work model, 2 days in the office, and a focus on delivering a high-quality platform used by thousands of professionals across Europe.