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. 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. 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. 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 stabilityOperational 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. Stack: Node.js (TypeScript), NestJS (or similar frameworks), React, React Native.
Data & State: MongoDB (Atlas), Redis for caching and distributed locking and PostgreSQLObservability: Sentry and Datadog/New Relic for real-time monitoring and PostHog.
GitHub Copilot, Claude, ChatGPT, and other GenAI assistants.
Collaboration: GitHub, GitLab, Teams, JIRA, Confluence. 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, payment gateways (Stripe, Adyen, etc.), ledger systems, or reconciliation processes will be a plus.
Deep understanding of race conditions, eventual consistency, idempotency, and message brokers is a must.
Quality First: Extensive experience with automated testing patterns and a "shift-left" security mindset.
Turn inspiration into possibility: get space to try new ideas, experiment and move the world of work forward as you bring new digital experiences
- and moments of connection
- to millions of people. Make a positive impact: touch millions of lives and create meaningful change for people and the world we share, supporting our commitments to diversity, sustainability, and local economies.

📌 Product Engineer Junior (España)
🏢 Pluxee
📍 España