Permanent Regular Job Description:Join Cobee by Pluxee as a Senior Product Engineer and become a key contributor to our mission of revolutionizing employee compensation.
You'll own features end-to-end — backend, frontend, and the AI-assisted workflows that let one engineer move fluidly across the stack — inside one of our core domains.Your next challenge Join Cobee by Pluxee as a Senior Product Engineer and become a key contributor to our mission of revolutionizing employee compensation.
You'll own features end-to-end — backend, frontend, and the AI-assisted workflows that let one engineer move fluidly across the stack — inside one of our core domains.
Benefits isn't a simple CRUD layer — it's a rich domain with multi-tenant configurations, eligibility rules that vary by company and country, tax compliance requirements, and real-time state that must always be consistent.
Covers areas like health insurance, pensions, custom benefits, food and transport, childcare, training, and renting.
A high-performance team dedicated to resilient, mission-critical systems where transactional precision, idempotency, and fault tolerance are at the heart of everything.
Leaders — The Leaders domain covers the employee-facing mobile and web experience within the Cobee platform, managing personal data, benefit visibility, and privacy compliance (GDPR/LPD).
A domain where company-level configuration, data integrity, and cross-region consistency matter as much as UX.
Key Responsibilities What You'll Do - Own Features End-to-End : Take a feature from domain design through backend services to the UI that ships it, and the observability that tells you it's working.
- Build and optimize robust software capable of handling high-volume traffic while ensuring data consistency and system reliability,



evolving existing systems into scalable, event-driven architectures as product requirements grow.
- Understand the complexities of existing systems and evolve them into scalable, event-driven architectures to meet future integral product requirements.
- You will champion comprehensive automated testing (unit, integration, and e2e) and run advanced load and performance simulations to guarantee rock-solid stability - Operational Excellence & Observability : Share your expertise through deep code reviews, mentoring junior engineers, and documenting engineering standards that elevate the entire squad.
- Actively leverage AI tools and coding assistants on a daily basis to accelerate development cycles (SDD), automate repetitive tasks, and optimize overall team processes and delivery speed powered by AI Agents.
Our Technical Stack - Stack : Node.Js (Type Script), Nest JS (or similar frameworks), React, React Native.
- Data & State: Mongo DB (Atlas), Redis for caching and distr ibuted locking and Pos t gre SQL - Infrastructure : Docker, Kubernetes, Git Lab CI/CD ( deploying multiple times daily ).
- Sentry and Datadog/New Relic for real-time monitoring and Post Hog.
- AI & Productivity : Git Hub Copilot, Claude, Chat GPT, and other Gen AI assistants.
- Collaboration : Git Hub, Git Lab, Teams, JIRA, Confluence.
You are a match - Proven Senior Expertise: 5+ years of experience building production-grade applications, full-stack or with strong ability to work across layers.
( Experience within Typescript ecosystem will be a plus. ) - Comfort working across backend and frontend, using AI tooling to close gaps in unfamiliar territory.
- Deep understanding of race conditions, eventual consistency, idempotency, and message brokers.
- The " Payments Mindset ": experience with banking systems,

📌 Engineer/Constructeur (Madrid)
🏢 Pluxee Belgium
📍 Madrid