Senior Backend Engineer - 4-Day Week, Hybrid Elixir-curious

WelcomeTrack; Paris; Hybrid; EUR 70,000 - 100,000; Full time

Benefits offered by this job

A 4-day work week

Hybrid working

25 days paid leave

Alan health insurance and Teale (mood/

Job summary

WelcomeTrack is seeking a senior backend engineer to design, build, and maintain scalable services and APIs. You’ll collaborate with a PM and Designer to clarify user needs and priorities, contributing to architecture decisions and the CI/CD pipeline.

The role emphasizes testing, security, and performance, with a collaborative, cross-continental team across Paris and London. You’ll work in a hybrid setup with a 4-day work week and generous leave.

Qualifications

• 7+ years of professional back-end development experience.
• Experience with server-side languages: Elixir, Node.js, Ruby, Python or similar.
• Strong SQL and NoSQL databases, REST APIs, and distributed services.

Responsibilities

• Design, build and maintain scalable back-end services, APIs and database schemas.
• Write clean, well-tested code, and review teammates' code with feedback.
• Take part in architecture decisions and document what you decide.
• Work with PM and Designer to clarify priorities and user needs, not just tickets.
• Debug production issues and fix the root cause.
• Write unit and integration tests, pair when helpful, maintain test coverage.
• Monitor performance and act on degradations.
• Follow security best practices and handle vulnerabilities.
• Handle support requests and bug fixes within SLAs.
• Contribute to CI/CD pipeline and overall developer experience.

Skills

Elixir

Node.js

Ruby

Python

SQL

NoSQL

REST APIs

CI/CD

Testing

Distributed services

Product thinking

French & English

Tools

PostgreSQL

Job description

WelcomeTrack is seeking a senior backend engineer to design, build, and maintain scalable services and APIs. You’ll collaborate with a PM and Designer to clarify user needs and priorities, contributing to architecture decisions and the CI/CD pipeline.

The role emphasizes testing, security, and performance, with a collaborative, cross-continental team across Paris and London. You’ll work in a hybrid setup with a 4-day work week and generous leave.