Back End Engineer - Senior

Welcome to the Jungle; Paris; Hybride; EUR 70 000 - 100 000; Plein temps

Avantages offerts par ce poste

A 4-day work week

Hybrid working

25 days paid leave

Alan health insurance

Meal vouchers

Navigo pass reimbursement up to 75%

Sick child leave

Employee Resource Groups

Professional development plan

Résumé du poste

Welcome to the Jungle is hiring a senior backend engineer to design, build and maintain scalable services and databases. You'll work closely with a PM and Designer in a cross-functional squad across Paris and London.

Our stack centers on Elixir; while you don't need to know it at first, curiosity about it is essential. Expect strong testing, CI/CD, security and a pragmatic, collaborative culture.

Qualifications

• 7+ years of professional backend development experience.
• Experience with scalable services and databases.
• Strong testing, CI/CD and software craftsmanship.

Responsabilités

• 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 outcomes
• Work directly with PM and Designer to clarify priorities and user needs
• Debug production issues and fix the root causes
• Write unit and integration tests and maintain test coverage
• Monitor performance and address degradation
• Follow security best practices and handle vulnerabilities
• Handle support requests and bug fixes within SLAs
• Contribute to CI/CD and developer experience

Connaissances

Back-end development

REST APIs

Distributed systems

Testing & CI/CD

Product thinking

Team collaboration

French & English

Security practices

Outils

Elixir

Node.js

Ruby

Python

SQL

NoSQL

REST APIs

Description du poste

Most back-end job ads could be swapped between companies without anyone noticing. So here's what's actually specific about this one.

We're Welcome to the Jungle. We build the Hiring Suite companies use to recruit: employer branding, job matching, sourcing and an ATS. Around 260 people between Paris and London, a product used by thousands of companies, and an engineering org that ships regularly rather than endless sprints.

You'd join a cross-functional squad alongside a Product Manager, a Designer and an Engineering Manager. Small team, real ownership, and a say in the technical decisions rather than a backlog handed to you.

Our main back-end stack is Elixir. You don't need to know it, several of our engineers learned it here, but you do need to be the kind of person who finds that interesting rather than inconvenient.

• Design, build and maintain scalable back-end services, APIs and database schemas

• Write clean, well-tested code, and review your teammates' code with actual feedback

• Take part in architecture decisions rather than inherit them, and document what you decide

• Work directly with your PM and Designer to clarify priorities and user needs, not just tickets

• Debug production issues and fix the cause, not the symptom

• Write unit and integration tests, pair when it helps, and keep test coverage honest with our QA team

• Monitor performance, spot what's degrading, and do something about it

• Follow security best practices and handle vulnerabilities when they come up

• Handle support requests and bug fixes within agreed SLAs

• Contribute to our CI/CD pipeline and to the overall developer experience

• A 4-day work week with a fifth flexible one

• Hybrid working

• 25 days of paid leave

• Alan health insurance and Teale, our mental health support platform

• Meal vouchers

• Up to 75% reimbursement of your Navigo pass

• Sick child leave

• Employee Resource Groups

• A professional development plan

Around 7 years of professional back-end development experienceComfortable with a server-side language: Elixir, Node.js, Ruby, Python or similar. Elixir experience is a bonus, curiosity about it is the real requirement.Solid with databases, SQL and NoSQL, and with REST APIs and distributed servicesSerious about testing, CI/CD and software craftsmanship, not as buzzwords but as daily habitsProduct thinking: you ask who the user is and why, before asking howA collaborative mindset. You'd rather unblock a teammate than finish your own ticket first.Clear communication in both French and English. Our engineering teams work across Paris and London.