Top Software Engineer Jobs in Valencia

Owns technical direction and hands-on execution for major products and systems. Designs scalable, reliable architectures across backend, frontend, APIs, databases, and infrastructure; writes code; leads architecture decisions; solves complex production problems; improves engineering quality; and mentors engineers across teams.

Lead technical direction and hands-on execution for major products and systems used by millions of users. Responsibilities include designing scalable and reliable backend, frontend, API, database, and infrastructure solutions; writing and reviewing code; making architecture trade-offs; resolving production issues; improving testing, security, observability, and development practices; and mentoring engineers across teams.

Own technical direction and execution for major products and systems. Design scalable, reliable architectures, write production code, lead engineering initiatives, make technical trade-offs, solve complex production issues, improve engineering quality, and mentor engineers across teams. The role is hands-on, remote, globally distributed, and requires strong English communication.

Build and scale Base360.ai: design APIs, services, and cloud-native infrastructure; implement event-driven automations, AI-powered workflows, and integrations (Airbnb, Stripe, Twilio, OpenAI). Own projects end-to-end to automate operations, improve pricing and guest experiences, and enable global scaling.

Build and ship end-to-end features and agentic automations for North, Cohere's AI workspace for finance. Integrate financial data sources, enforce data isolation and RBAC, collaborate with Product/UX/ML/Sales, work with finance customers, ensure reliability/security/auditability, and iterate on platform capabilities using AI where appropriate.

Build and maintain North's Agents & Automations platform: design and ship frontend and backend features, execution engine, integrations, debugging, observability, evaluation, and feedback systems to enable reliable AI-powered workflows.

The role involves designing and implementing features, debugging, maintaining documentation, and collaborating with the community in the Mir graphics stack.

Build and operate cloud platform services: implement features in production, own scoped projects from requirements to production, participate in design and code reviews, operate services including on‑call, automate repetitive work, and collaborate asynchronously with distributed teams.

As a Staff Software Engineer, you'll shape technical strategy, build integrations and services, lead operational processes, and mentor your team, ensuring high-quality code and fostering collaboration across teams.

As a Staff Full Stack Software Engineer, you'll guide technical strategy, mentor engineers, and ensure quality in full stack development while collaborating across teams.

Develop and enhance MAAS core components, improve architecture, collaborate across teams, and ensure high standards in documentation and CI practices.

Lead development of vector similarity search capabilities in Elasticsearch, including designing algorithms and data structures, implementing modern Java features, improving search relevance and performance, fixing bugs, and collaborating with a globally distributed engineering and open-source community. Own technical initiatives from design through delivery, guide cross-functional projects, and serve as an expert on Elasticsearch vector search.

Lead development of Elasticsearch vector search capabilities, including designing and implementing new features, algorithms, and data structures; improving search relevance, speed, and scalability; fixing complex bugs; and contributing to Apache Lucene. Collaborate with a globally distributed engineering and open-source community, provide technical leadership, review code, and guide cross-functional initiatives. Develop modern Java software and independently drive projects from technical design through delivery.

Lead Elasticsearch search relevance and vector search initiatives, designing and implementing new search features, algorithms, and data structures in modern Java. Improve performance, scalability, and relevance; resolve complex bugs; collaborate with a globally distributed engineering and open-source community; review code, guide technical decisions, and own projects from design through delivery.

Lead Elasticsearch search relevance initiatives, designing and implementing search features, algorithms, and data structures while resolving complex bugs. Improve vector search capabilities, performance, scalability, and code quality using modern Java. Collaborate autonomously with globally distributed engineers and open-source contributors through design, code review, issue triage, and cross-functional initiatives.

Lead development of Runware’s AI platform, including scalable backend APIs, SDKs, developer tools, and inference orchestration systems. Design high-performance distributed architectures, optimize image and video model integrations, improve reliability and observability, shape technical direction, and mentor engineers. Collaborate across platform, infrastructure, and product teams to deliver robust developer experiences and maintainable systems.

Design, build, and own scalable backend services, APIs, and high-performance web frontends for an autonomous procurement platform. Improve reliability, security, and performance, implement async task pipelines, and collaborate with product and design. Mentor juniors, participate in code reviews, and leverage AI-assisted tools while shipping iteratively in a globally distributed, async-first team.

Lead technical direction and hands-on execution for major products and systems. Design scalable backend, frontend, API, database, and cloud solutions; write and review code; make architecture trade-offs; resolve production issues; improve testing, security, observability, and engineering practices; lead critical initiatives and mentor engineers across distributed international teams.

Lead technical direction and hands-on execution for major software products and systems. Design scalable backend, frontend, API, database, and infrastructure solutions; write code; make architecture trade-offs; resolve production issues; improve engineering quality; lead critical initiatives; and mentor engineers across distributed international teams.

Owns technical direction and execution for major products and systems. Designs scalable, reliable architectures across backend, frontend, APIs, databases, and infrastructure; writes code; leads architecture decisions; resolves complex production issues; improves engineering quality; drives critical initiatives; and mentors engineers across teams.

Design and evolve core cloud platform services, control-plane components, and internal APIs. Build platform abstractions, drive architectural initiatives (gRPC migration, eventing), write production-grade Go code, improve scalability and developer experience, and support production systems and incident response when needed.

Design and evolve core cloud platform services, control-plane components, internal APIs, and platform abstractions. Build production-grade Go services and tooling, drive architectural initiatives such as gRPC migration and eventing foundations, and improve scalability, reliability, and developer productivity. Collaborate across engineering teams, support production systems and incident response, and drive long-term technical solutions for managed cloud and enterprise deployments.

Design and scale backend systems, APIs, and services for Nango’s open-source developer infrastructure platform. Build APIs, SDKs, UIs, and runtime systems, optimize performance and reliability, solve integration challenges with customers, shape the roadmap, and maintain the open-source repository. The role requires strong ownership, product thinking, developer empathy, communication, and autonomy in a remote-first startup environment.

The Fullstack Software Engineer will design and build the core billing platform, handling payments and transactions while ensuring system scalability and reliability.

As a Fullstack Software Engineer, you will develop the core billing engine, ensuring accurate transaction processing, integrating with systems and platforms, and collaborating with teams to maintain a unified platform experience.