Top Software Engineer Jobs in Valencia

Develop high-performance real-time embedded software for ARM Cortex-M systems, including device drivers, APIs, SDKs, hardware abstraction layers, testing tools, and documentation. Collaborate with cross-functional engineering teams, perform code reviews, analyze test results, support customers during beta and post-release phases, follow software quality and licensing practices, and mentor junior engineers.

Own and deliver backend identity systems for international markets, shaping technical direction, designing distributed, highly available services, and collaborating with product, design, and analytics. Improve reliability, performance, and operational health; participate in on-call rotation; set code and design standards; mentor and grow engineers; reduce toil and create runbooks/playbooks. Drive cross-team collaboration to meet regulatory and market-specific identity/KYC requirements.

Build and maintain hardened Ubuntu-based container images and the automated CI/CD pipelines to build, test, scan, sign, publish, and retire them. Integrate upstream open-source projects, ensure security and cloud-native compatibility, collaborate with cross-functional teams, document and share knowledge, mentor colleagues, and contribute to hiring. Work in a distributed agile environment with occasional travel.

Build and scale a blockchain data platform handling petabytes of on-chain data. Design and implement distributed systems, data ingestion/decoding pipelines, and performant SQL processing. Write production code (Kotlin, Go, Java, Rust), improve developer experience, automate operations (including AI-driven automation), and own platform components.

Build and operate Grafana's bare-metal platform: provision storage, networking, and Kubernetes clusters; manage cluster networking, scheduling, and autoscaling; maintain Crossplane compositions and Terraform modules; collaborate with product teams; participate in on-call rotation and datacenter operations.

Lead and deliver Repayment UX features for Affirm's mobile products using React Native. Own quarterly goals, guide engineers through ambiguous problems, collaborate with product/design/analytics, ensure operational reliability (metrics and on-call), improve engineering standards, and mentor teammates to drive high-quality, scalable mobile experiences.

Develop and optimize algorithms for battery and renewable energy projects, analyze market data trends, and ensure algorithm performance.

Own and build the Android client for an AI-first app: implement AI features (chat, vision, voice), optimize performance and memory, design UX for streaming and partial results, integrate backend APIs, instrument analytics/logging, and collaborate with backend and ML teams to ensure stability, security, and scalability in production.

As a Backend Software Engineer, you'll design scalable backend systems, optimize database performance, and collaborate with front-end and DevOps teams.

Contribute to Juju's development, collaborate with teams on distributed systems, debug issues, and enhance cloud automation features.

Design, develop, and maintain Java back-end services within a microservices architecture. Build REST and GraphQL APIs, integrate cloud and data technologies, and support reliable web applications. Collaborate with cross-functional teams in Agile workflows, contribute to testing and code quality, and use technologies such as Spring Boot, AWS, Snowflake, Redis, Docker, and Kubernetes.

Six-month full-time graduate program for final-year or recent engineering graduates. Work in production from day one, contribute to global-scale systems, learn from experienced engineers, and develop foundations in backend development, testing, CI/CD, cloud, and best practices. Potential transition to a permanent role after the program.

Design, implement, and optimize scalable application networking features (Ingress, DNS, private connectivity) for Elastic Cloud. Integrate security controls, conduct load and performance testing, troubleshoot network incidents, build tracing tools, and collaborate with cross-functional teams to meet application networking needs and improve observability and operability.

Software Engineers at QuantCo will design and develop scalable solutions, integrate models into client businesses, and improve products based on client feedback.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

As a Senior Tech Generalist, you'll build and maintain end-to-end systems, improve scalability, and ensure reliable financial operations while mentoring others in a dynamic team environment.

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

The Software Engineer role involves developing high-quality web and mobile applications, collaborating with cross-functional teams, and ensuring core engineering practices while maintaining a strong user focus.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

Build and maintain integrations for North's agentic platform, own the end-to-end integration pipeline, create evals and tests to ensure reliability, tune tool descriptions, and help other engineers add and maintain integrations while using AI responsibly to improve performance and quality.

As a Staff Software Engineer, you will define engineering vision, lead large projects, ensure code quality, and mentor engineers while enhancing the scalability of the platform.

As a Senior Software Engineer, you will build scalable systems, mentor engineers, and ensure high availability of data pipelines, collaborating with cross-functional teams.

Lead and deliver quarterly goals for a backend team building low-latency payment and ledger systems. Design, implement, and operate scalable backend services, collaborate with product/design/analytics, own on-call and availability, set code/design standards, and mentor engineers.

Lead backend engineering for EU cards: set technical strategy, design low-latency transaction and ledgering systems, ensure operational reliability (monitoring, on-call, playbooks), collaborate cross-functionally, mentor engineers, and drive code and design quality across teams.

Design, build, and maintain performant React/Redux/Vite web applications and data-visualization portals. Collaborate across teams to implement features and RESTful APIs, write tests, perform code reviews, debug complex issues, follow agile and CI/CD practices, refine UX details, and adopt tooling to speed development.