Senior Backend Engineer

hace 2 días

Madrid, Madrid, España Gamdom A tiempo completo

We are looking for a Senior Backend Engineer to join our growing engineering team. In this role, you will be responsible for designing, building, and maintaining scalable backend services that power our platform. You will work on real-time systems, optimize performance, and collaborate closely with product and engineering teams to deliver high-impact features. This is a hands-on role where you will influence architecture decisions and help shape best practices across the backend team.

Responsibilities:

  • Backend Engineering: Design, implement, and maintain scalable backend services using (Express) and TypeScript.

  • System Design: Own technical decisions, service boundaries, API design, and reliability patterns for backend components.

  • Database Ownership: Design schemas, write and optimize SQL, and improve PostgreSQL performance (indexes, query plans, migrations).

  • Real-Time Functionality: Build and operate real-time features using WebSockets ), ensuring stability under load.

  • Performance and Scalability: Improve throughput and latency, and proactively address bottlenecks across services and the database.

  • Quality and Testing: Write and maintain unit and integration tests, raising overall engineering quality.

  • Debugging and Incident Support: Troubleshoot complex production issues across the stack and implement long-term fixes.

  • Collaboration: Work closely with product owners and engineering teams to deliver high-impact features with predictable execution.

  • Continuous Improvement: Contribute to better tooling, standards, and engineering practices across the backend team.

Requirements:

  • Proven experience as a Senior Backend Engineer (or backend-focused Full-Stack Engineer) delivering production systems at scale.

  • Strong expertise in and Express with TypeScript.

  • Strong proficiency in PostgreSQL, including schema design, migrations, data modeling, and query optimization.

  • Hands-on experience with WebSockets and real-time systems (preferably ).

  • Strong problem-solving skills and ability to work independently on ambiguous, complex tasks.

  • Solid communication and collaboration skills in a fast-paced, cross-functional environment.

  • Experience with CI/CD pipelines and DevOps practices.

Nice to Have:

  • Experience with and state management (MobX is a plus) for occasional frontend contributions.

  • Experience with crypto transactions.

  • Familiarity with testing frameworks like Jest or Mocha.

  • Experience working in Agile/Scrum teams.

Why Join Us?

  • Fully remote - work from anywhere in the world

  • Flexible schedule

  • 25 days of paid time off

  • Equipment allowance

  • Senior Backend Engineer

    hace 6 días

    Madrid, Madrid, España Happening A tiempo completo

    Senior Backend Engineer (Gaming) Why this role mattersHappening powers the technology behind Superbet's platforms and brands, serving millions of customers. Our Game Integrations squad connects third-party providers to our core platform and ensures those experiences are reliable, scalable, and compliant.We're growing and scaling fast, and we need...

  • Senior Backend Engineer

    hace 7 horas

    Madrid, Madrid, España Jobgether A tiempo completo

    This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Backend Engineer (Kotlin/Java) in Spain. This role offers the opportunity to design and build highly scalable backend systems used in complex, distributed environments. As a Senior Backend Engineer, you will work on high-throughput, event-driven...

  • Senior Backend Engineer

    hace 2 días

    Madrid, Madrid, España Super Technologies A tiempo completo

    It's an exciting time to join us We're entering new markets, developing new technologies, and moving step by step towards our goal of exciting the world. As our business grows, the number of exciting people initiatives grows with it, and we're looking for a new colleague to partner with our team to bring these to life.Senior Backend Engineer (Gaming) Why...

  • Senior Backend Engineer

    hace 4 días

    Madrid, Madrid, España TALENTIVO A tiempo completo

    Oferta para LinkedInBuscamos un/a Senior Backend Engineercon sólida experiencia enJavay pasión por construir soluciones robustas, escalables y bien diseñadas.Si disfrutas trabajando conarquitecturas limpias, buenas prácticas de desarrollo y entornos tecnológicos modernos, esta puede ser tu próxima oportunidad. ¿Qué buscamos?Un perfil con al menos3...

  • Senior Backend Engineer

    hace 7 días

    Madrid, Madrid, España Gaming Innovation Group A tiempo completo

    Department:TechnologyLocation:MadridDescriptionWe are seeking aSenior Backend Engineerwith 5–8 years of experience to join our platform engineering team. The candidate should have advanced proficiency in backend languages and frameworks, strong expertise in database design and optimization, and proven experience with microservices architecture, event...

  • Senior Backend Engineer

    hace 7 días

    Madrid, Madrid, España fiskaly A tiempo completo

    Job DetailsJob Title: Senior Backend Developer (Golang)Location: Preferably in / near Vienna, or within a 2h time zone differenceLanguages: German (fluent) & EnglishExperience: Over 5 years of experience in backend development using Golang and other OOP languages, you will contribute to our SaaS platform, managing the full software lifecycleSalary: €56,000...

  • Senior Backend Engineer

    hace 4 días

    Madrid, Madrid, España Happening A tiempo completo

    About Superbet & Core ExperienceSuperbet is building the future of entertainment across Europe and Brazil. With millions of monthly active users and over €1B in annual revenue, ourCore Experiencearea owns the surfaces that shape how players discover, play, and engage every day.Within Core Experience, theExplore tribedrives the experiences that help players...

  • Senior Backend Engineer

    hace 7 días

    Madrid, Madrid, España Welltech A tiempo completo

    Who Are We?We are Welltech — a global company with Ukrainian roots and a powerful mission: to move everybody to start and stay well for life. Today 25.5 million users have trusted Welltech to help them build healthy habits — a testament to the real value our innovative, engaging wellness solutions deliver every day. With five hubs across Cyprus, Ukraine,...

  • Senior QA Engineer

    hace 1 semana

    Madrid, Madrid, España E-Frontiers A tiempo completo

    QA Engineer - Mid/Senior con Automatización de Pruebas (Backend/API)DesdeE-Frontiers, estamos colaborando con unaempresa internacional líder en su sectoren la búsqueda de un perfilQA Engineer Mid/Seniorcon experiencia enautomatización de pruebas de API y servicios backend.Somos una agencia de reclutamiento especializada en perfiles IT, de origen...

  • Senior Backend Engineer

    hace 7 días

    Madrid, Madrid, España Pleo A tiempo completo

    Messy spend management is tricky business. And tedious processes are a lose-lose situation for all involved, not just finance. At Pleo, we're changing that. We build spend solutions that make managing money seamless, empowering, and surprisingly effective for finance teams and employees alike—with a vision to help all businesses 'go beyond'.The word 'Pleo'...