Senior Backend Engineer

Join one of Southern Europe's fastest-growing startups Enginy is a Barcelona-based startup and one of Southern Europe's fastest-growing companies ranked #3 in the Sifted 100: Southern Europe 2026, and we're just getting started. We're building the AI-native GTM platform for modern B2B teams, combining prospecting, enrichment, intent signals, AI research and outreach into one product so sales teams can focus on what truly matters: selling. No wasted time, just results. After raising a €5M seed round, we're scaling internationally and growing the team behind the product. That means more users, more data, more integrations and harder engineering problems exactly the stage where strong engineers have an outsized impact. As a Backend Engineer, you'll have real ownership from day one over the engine behind our platform: high-throughput workflows, data pipelines and integrations with the tools our customers live in. You'll make real technical trade-offs and help define how we build as the company scales. If you enjoy designing systems that hold up under load, debugging the hard stuff and seeing your work directly impact customers, you'll have plenty of room to make a difference here. About the role Every lead found, every signal detected and every message sent on Enginy runs through our backend. As usage grows, so do the volume, the integrations and the reliability bar and that's the problem space you'll own. We're looking for an engineer who does more than execute tickets: someone who owns problems end to end, from design to production to observability. Design → build → ship → observe → scale What you'll own Core services: build and maintain scalable, reliable services that power our core engine Async workflows: work with async architectures, data pipelines and workflow orchestration with Temporal APIs & integrations: design and implement production-grade APIs and integrations with external platforms (CRMs, LinkedIn and more) Performance & reliability: optimize performance, debug complex issues and ensure strong observability across the system End-to-end delivery: collaborate closely with Product, Design and Frontend to ship complete features with a focus on quality, reliability and speed Engineering standards: help shape engineering practices, code quality and architecture as we scale About you 5+ years of professional software engineering experience with a strong backend focus Strong experience with TypeScript and Node.js Solid understanding of modern API design and async workflows Experience with relational databases (PostgreSQL or similar) Ability to work autonomously, debug complex issues and ship high-quality code Strong communication skills and an advanced level of English Bias for action and ownership you thrive in a fast-moving startup Nice to have Experience with workflow engines (e.g. Temporal), distributed systems or microservices Experience with Redis, Elasticsearch, Kafka or…