Top Software Engineer Jobs in Valencia

Build and maintain high-volume payment services, write testable code, improve reliability and performance, investigate production issues, collaborate across product and engineering teams, and explore AI-enabled engineering tools to boost productivity.

Design and build the on-prem software stack for ModelVault appliances: containerized inference engines, model integration (LLMs/vision), deployment tooling, CLIs/GUI/APIs, OS and GPU setup, remote updates, telemetry, and collaborate with customers and founding team to iterate and scale the engineering org.

Build core components of a diagnostic and personalization platform: backend data pipelines, frontends, services for genomic data ingestion, ML model integration, APIs, and cloud infrastructure. Collaborate with product and ML teams, iterate on prototypes and MVPs, and make architectural decisions supporting scalability and reliability.

Build and maintain Ergodic AI’s AI platform across back-end and front-end systems. The role involves developing with Python web frameworks and JavaScript/TypeScript, integrating with client technology stacks and workflows, applying AI, ML, and LLM concepts, and contributing to DevOps, cloud deployment, testing, and infrastructure practices. As an early-stage hire, the engineer will help shape the product and solve complex data and AI challenges.

Design and implement large-scale browser-based rendering infrastructure to execute and extract structured content from JS-heavy web apps. Improve rendering quality, performance, cost, and throughput at internet scale and productionize rendering research.

Design and develop clean, maintainable software for automated document-processing products. Collaborate with business stakeholders to translate requirements into product improvements, conduct code reviews, guide technical direction, mentor colleagues, and improve engineering practices. The role uses Golang, MySQL, Docker, Kubernetes, cloud infrastructure, and GitHub CI/CD while emphasizing product ownership, clean architecture, software craftsmanship, and technical communication.

Build and own React Native features for Kraken’s consumer mobile app, from product discovery through launch, measurement, and iteration. Partner with Product and Design to create responsive, trustworthy financial experiences using dynamic or real-time data. Guide development for a new Asian-market app, including regional UX, connectivity restrictions, vendors, and telemetry. Contribute to architecture, performance, reliability, code reviews, and product engineering standards.

Owns the CI/CD and release infrastructure roadmap, technical vision, security gates, artifact provenance, and organizational adoption. Directs engineers through complex, multi-quarter projects, leads incident response for supply-chain and release issues, and raises engineering standards through mentorship and reviews. Remains hands-on with code, prototyping, debugging, and production issues while improving developer productivity, release safety, and infrastructure scalability.

Lead the modernization of business-critical legacy PHP systems into scalable Node.js and Next.js architectures. Provide hands-on coding, architectural guidance, API and microservices design, debugging, refactoring, and incremental migration leadership. Translate undocumented business logic into maintainable solutions, leverage AI-assisted development tools, communicate trade-offs to stakeholders, establish engineering standards, and mentor additional engineers.

Build and ship backend features for enterprise Coder deployments, including database migrations, observability, reporting, auditing, security, scalability, and reliability improvements. Investigate production issues, resolve operator problems, document designs, participate in code reviews and RFC discussions, and join on-call rotations. The role requires professional Go development, concurrency knowledge, SQL expertise, debugging ability, and strong communication.

Senior Software Engineer on Elastic’s Elasticsearch Performance team, developing and implementing code- and architecture-level optimizations for distributed search systems. Responsibilities include profiling, benchmarking, regression detection, performance modeling, vector search optimization, and building AI-assisted optimization tools. The role requires deep Java and JVM expertise, concurrency knowledge, distributed systems experience, and collaboration across engineering teams.

Build and maintain backend collections systems to manage delinquent loans, implement recovery strategies, ensure high availability and reliability, collaborate with product and risk teams, participate in on-call rotation, write well-tested extensible code, and contribute to team growth.

Build front-end experiences and backend services for integrating prediction markets into MetaMask. Develop scalable APIs, real-time data feeds, transaction signing, and secure on-chain protocol integrations. Optimize performance, security, and high-volume transaction throughput across mobile, web, and browser clients while collaborating within an agile, distributed engineering team.

Build and operate backend pricing systems for real energy contracts. Responsibilities include designing the Pricing API, consolidating pricing logic, improving quote speed, implementing error handling and observability, creating alerting, explaining pricing failures, and supporting live incidents. The role requires production Python backend experience, FastAPI, SQL, data-heavy systems, end-to-end project ownership, and AI-assisted development workflows.

Develop and enhance MetaMask social and multi-chain experiences across Portfolio, browser extension, and mobile platforms. Collaborate across teams on complex projects, mentor engineers, and build scalable full-stack applications using React, React Native, modern JavaScript, blockchain technologies, APIs, testing, and continuous integration. Ensure cross-platform compatibility and apply web security best practices.

Designs and develops backend services for Elastic’s Streams data pipeline, Logstash, and OpenTelemetry Collector using Java, JRuby, and Golang. Responsibilities include solving distributed systems problems, improving code and dependencies, maintaining test coverage, reviewing pull requests, collaborating across teams, supporting enterprise customers, and participating in on-call rotations.

Build and evolve Rerun’s open-source viewer, cross-language SDKs, and integrations with Rerun Hub. Develop high-performance interfaces for large-scale multimodal data, optimize workflows across desktop and web, make full-stack architecture decisions, and collaborate with backend, Hub, design, customers, and the open-source community. The role involves UI development, rendering, data handling, infrastructure, real-time applications, visualization, and performance optimization.

Develop and optimize software solutions for industrial additive manufacturing in an agile team. Responsibilities include designing algorithms, data structures, and software subsystems; debugging complex issues; benchmarking and improving performance, stability, efficiency, and scalability; and contributing to software quality and documentation. The role uses Vue.js, TypeScript, Python, C++, MongoDB, Docker, and automated development tools.

Leads software test automation solutions, infrastructure integration, CI/CD pipelines, and stakeholder requirements for new and legacy projects. Responsibilities include configuring Linux, virtual build and test environments, databases, code coverage tools, containers, and continuous integration systems; troubleshooting infrastructure; supporting test frameworks and training; and promoting automation best practices. The role also involves project planning, cross-team coordination, and occasional development of automation infrastructure.

Develop and maintain scalable frontend web applications and data visualization platforms using React, Redux Toolkit, and Vite. Collaborate with cross-functional teams, implement features, write tests, conduct code reviews, troubleshoot issues, and support RESTful APIs. Contribute to agile processes, accessibility, user experience improvements, and continuous development while using AI tooling responsibly and staying current with modern web technologies.

Design, build, and scale a Kubernetes-based internal platform for managed cloud products. Develop highly available and fault-tolerant production services using Kubernetes and cloud-native technologies, contribute to enterprise platform roadmaps, integrate infrastructure technologies, establish engineering best practices, mentor teammates, and collaborate across Agile engineering teams.

The Software Engineer will join a product squad to develop and maintain functionalities on the 360Learning platform, focusing on JavaScript technologies and clean architecture.

Build full-stack infrastructure, developer tools, frameworks, and user-facing interfaces that improve engineering productivity and operational excellence. Work across Python/Flask, React, React Native, and PostgreSQL in a monorepo, contributing to design systems, accessibility, security, cloud infrastructure, CI/CD, observability, and AI-assisted development. Partner closely with product teams, own solutions end to end, and help create a scalable, secure engineering environment.

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.

Build scalable backend systems and data pipelines to power consumer credit reporting. Partner with Product, Compliance, Servicing, and Credit teams to design, deliver, monitor, and operate accurate reporting systems, including on-call responsibilities. Develop robust, well-tested code in Python or Kotlin using distributed systems patterns and technologies like AWS, MySQL, and Spark.