Senior Backend Engineer, Node.js + AWS

Sr Backend Engineer | Integrations Squad page is loaded## Sr Backend Engineer | Integrations Squadremote type: Hybridelocations: Madridtime type: Full timeposted on: 2 dagen geleden geplaatstjob requisition id: R4333Permanent RegularJob Description:Pluxee is a global player in employee benefits and engagement that operates in 31 countries. Pluxee helps companies attract, engage, and retain talent thanks to a broad range of solutions across Meal & Food, Wellbeing, Lifestyle, Reward & Recognition, and Public Benefits. Powered by leading technology and more than 5,000 engaged team members, Pluxee acts as a trusted partner within a highly interconnected B2B2C ecosystem made up of more than 500,000 clients, 36 million consumers and 1.7 million merchants. Conducting its business as a trusted partner for more than 45 years, Pluxee is committed to creating a positive impact on all its stakeholders, from driving business to local communities, to supporting wellbeing at work for employees while protecting the planet. **Your next challenge** Join **Pluxee** as a **Senior Backend Engineer** and play a key role in building the integration layer that connects our platform with our customers’ ecosystems. You’ll join the **Integrations Squad**, the team responsible for designing and operating the systems that allow companies, partners, and providers to seamlessly integrate with **Cobee by Pluxee**. This is a critical mission: our integrations are a strategic entry point to the platform. Reliability, backward compatibility, clear contracts, and operational excellence are essential. We don’t just expose APIs — we build robust, scalable integration solutions that external systems depend on every day. **What You’ll Do*** **Design Integration-First Systems:** Design and evolve backend services and APIs that enable secure, reliable, and scalable integrations with customer and partner systems (HRIS, payroll, benefits providers, etc.).* **API & Contract Ownership:** Define, version, and maintain API contracts (REST, async events), ensuring backward compatibility and a smooth developer experience for external consumers.* **Handle Real-World Complexity:** Build systems that gracefully handle partial failures, retries, idempotency, rate limiting, and inconsistent external data.* **Event-Driven & Distributed Architectures:** Evolve existing synchronous flows into scalable, event-driven architectures that support growing integration needs across multiple markets.* **Quality & Reliability at the Edge:** Ensure high test coverage (unit, integration, contract tests) and validate integrations through sandbox environments, mocks, and automated validation pipelines.* **Operational Excellence & Observability:** Monitor integration health in production, detect anomalies, and troubleshoot issues across system boundaries using logs, metrics, and traces.* **Technical Leadership:** Lead by example through strong code reviews, mentoring, and documentation. Help define integration standards, best practices, and reusable patterns for the squad and beyond.**Our Technical Stack*** **Backend Core:** Node.js (TypeScript), NestJS (or similar frameworks)* **APIs & Integrations:** REST APIs, SFTP, Async messaging patterns* **Data & State:** MongoDB, PostgresSQL, ClickHouse* **Infrastructure:** AWS, Docker, Kubernetes, GitLab CI/CD* **Observability:** Datadog**You’re a Match If You Have a Few of the Below*** **Proven Senior Expertise:** 3+ years of experience building and maintaining production-grade backend systems, ideally in the Node.js ecosystem.* **The “Integrations Mindset”:** Hands-on experience building APIs or partner integrations. Familiarity with external system constraints, SLAs, and contract-driven development.* **Distributed Systems Knowledge:** Strong understanding of idemptecy, retries, eventual consistency, race conditions, and failure handling across system boundaries.* **Customer-Centric Engineering:** You care about developer experience, clear documentation, predictable behavior, and making integrations easy to adopt and operate.* **Quality & Security First:** Experience with automated testing strategies and a strong focus on data protection, authentication, authorization, and secure integrations.* **Growth Mindset:** Curious, open to feedback, and motivated to continuously improve both your own skills and the team’s engineering culture. **Happy at work** 1) A meaningful job: Be the change! Help us build the future of employee benefits by bringing to life sustainable and personalized experiences and contribute to make a real impact on millions of lives. Our business model delivers not just for individuals but their communities too, by supporting local businesses and economies. 2) A great culture: People matter – a lot! Be part of a multicultural team that moves as one in a fast paced and innovative environment. We respect and care authentically about our people, we embrace wellbeing and work-life balance, new ideas and we have a lot of fun! 3) An empowering environment: Be yourself! At Pluxee we proudly embrace diversity and value the uniqueness of our talents, fostering an inclusive work place where all abilities are celebrated, and equal learning and growing opportunities are a given.

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