Senior Scala Engineer — Real-Time, High-Performance Backend

A health technology company is seeking a Senior Software Engineer - Backend to design and build critical backend systems for their clinical AI platform. The ideal candidate will have over 10 years of experience in backend engineering, particularly with high-scale distributed systems, and expertise in Python and event-driven architectures. This full-time role...

A leading research technology firm in Spain is looking for an experienced Senior Software Engineer to join their Real-Time Engineering team. The successful candidate will work with top-level engineers on high-quality solutions that impact millions of users worldwide. A professional background in backend development and strong problem-solving capabilities are...

An international product company based in Barcelona is seeking a Backend Engineer to enhance their innovative technology for data-intensive workloads. The ideal candidate has over 3 years of software development experience, a solid foundation in algorithms, and is proficient in Java and Scala. This role offers the chance to work on advanced data storage and...

BlueThrone is a remote-first companythat work from all around the world.Our specialty is turning product market-fit apps into companies. We have over 80 million organic downloads and 22.5 million monthly active users.With a mission to transform iOS and Android applications to a new scale, we’ve achieved a remarkable ARR in just 25 months, exemplifying...

Senior Backend Engineer (LLM / AI Experience)HybridTech TeamFull-time Barcelona, Spain In a few wordsBuild and scale backend systems powering conversational AI & digital humansHands-on senior role balancing architecture + production codeWork deeply with LLMs, RAG pipelines, and real-time systems Barcelona (hybrid) or remote in Europe | €50k-€65kWhy...

Your Mission Join Livo as a Senior Backend Engineer and help reinvent how healthcare systems plan and deliver care. You’ll play a key role in building our next-generation Shift Work Planner — the engine that will empower 50,000+ healthcare professionals and 200+ facilities to coordinate care more fairly, flexibly, and efficiently. This is a hands-on role...

Overview Senior Backend Engineer - Node.js, TypeScript At BlueThrone, we don’t just build apps. We scale indie mobile products into global powerhouses. With 80M+ downloads, 20M+ MAU, and $14M+ ARR - we’re rewriting the rules of mobile scaling. We’re a lean, high-performing team that thrives on speed, ownership, and building products people actually...

Join the Senior Software Engineer - Backend role at Quadrivia AI. Posted 4 days ago – be among the first 25 applicants. About Quadrivia Quadrivia is a health technology company behind Qu, a customizable assistant AI built by clinicians for clinicians. Qu addresses the shortage of healthcare professionals by providing real‑time, personal, and reliable...

Meld provides a Fintech Stack as a Service, enabling companies to integrate and manage the financial technology services their products require through a single, unified API. The platform simplifies how businesses connect with third-party providers across payments, crypto, and bank-linking, reducing technical complexity and accelerating product development....

A growing tech company in Barcelona is seeking a Senior Backend Engineer to enhance its Customer Data Platform. This role emphasizes building scalable data pipelines and robust APIs, collaborating with various teams to ensure high-quality delivery and system performance. Candidates should possess strong backend fundamentals and enjoy improving existing...