Back-End Engineer

Paris, FRFull-time€50k–€59k2026-10-23 → 2026-11-10

Hybrid

Core

Design, build, deploy, and maintain features for a European digital trust platform serving businesses via app and API, ensuring security and compliance.

Role type

Senior Back-End Engineer (PHP/Symfony)

Builds

Multi-tenant, multi-country digital trust platform with API integrations

Domain

European digital trust, identity verification, compliance, eIDAS

Deliverable

production ML models | product features

Required skills

PHP, Symfony, relational databases, ORM, continuous integration, automated testing, AI coding tools (Claude/Codex), observability, security

Preferred skills

React, TypeScript, B2B SaaS experience, API monitoring, tech community engagement

Technologies

PHP, Symfony, RabbitMQ, Kubernetes, PostgreSQL, Docker, Terraform, Pulumi, GitLab, Datadog, React, TypeScript, Cypress, Claude, Codex

Responsibilities

Design and build features with squad members; propose technical designs via Architecture Decision Records; maintain code quality and automated tests; ensure observability, performance, and security; use AI tools for coding workflows; mentor developers; participate in agile ceremonies

Seniority

Senior, hands-on IC

About Yousign

Yousign (soon to be Youtrust) is a European Digital Trust provider, fully compliant with eIDAS and the highest European standards. Our three modules – electronic signatures, identity and document verification, and e-seals – can be used independently or combined within sector-specific workflows, ensuring simple, secure and legally compliant processes for SMEs and mid-sized companies. Hosted and processed entirely in Europe, we guarantee sovereignty, transparency and reliability. As a certified B-Corp, we combine innovation with responsibility – building trust at the heart of every digital excha