Top Software Engineer Jobs in Valencia

Build and operate full-stack repayment user experiences for millions of consumers. Break projects into deliverable phases, collaborate with product, design, and analytics, monitor system metrics, participate in on-call support, review code, and develop well-tested backend and web applications. The role requires backend development with Python or Kotlin and web application experience with React or Vue.

Develop and launch scalable backend systems for Affirm Card checkout products. Collaborate with product, design, analytics, and engineering teams to deliver phased projects, ensure system availability, monitor metrics, participate in on-call support, review code, debug systems, and contribute to interviews and team development.

Build and own backend platform infrastructure supporting Alan’s products, including event pipelines, service-to-service data replication, shared runtime components, and monolith decomposition. Design distributed systems, APIs, internal tools, and service patterns used by product engineering teams. Establish backend standards, SLOs, observability, and scalable production practices while influencing teams through collaboration and incremental migration.

Lead the technical direction and evolution of Affirm’s Recoveries platform. Design and operate scalable, correctness-sensitive backend systems supporting loan recoveries, partner integrations, payments, reconciliation, bankruptcy workflows, and customer experiences. Drive cross-team initiatives, improve reliability and observability, establish engineering standards, participate in on-call operations, and mentor engineers while ensuring regulatory compliance and strong data integrity.

Own and deliver repayment user experiences across mobile, web, and backend systems. Lead engineers through ambiguous problems, collaborate with product, design, and analytics, and drive technical decisions. Monitor reliability and availability, participate in on-call rotations, improve engineering standards, mentor teammates, and deliver scalable, high-quality software for consumer finance users.

Build and maintain Ruby on Rails APIs for internal workflows, from stakeholder discovery and requirements refinement through design, testing, release, and evaluation. Write secure, maintainable code handling authentication, authorization, and sensitive data. Troubleshoot API issues, add regression coverage, participate in design discussions, review code, document decisions, and collaborate asynchronously in a distributed agile team.

Develop production Rust code for managing, reconfiguring, and adapting cloud resources within a Kubernetes development platform. Collaborate on architecture, infrastructure, and feature design; use AI to improve delivery; and work directly with users to gather requirements and debug complex distributed environments. The role requires strong systems thinking, cloud-native infrastructure knowledge, and effective async collaboration in a remote-first startup.

Develop and maintain cloud-based backend and full-stack applications using Java, Spring Boot, Angular, and TypeScript. Build RESTful APIs and Kafka integrations within a microservices ecosystem, implement responsive interfaces, write automated tests, troubleshoot defects, participate in code reviews, and support the full software development lifecycle from design through deployment and maintenance.

Leads architecture, development, optimization, testing, and delivery of modern C++ 3D software for clinical dental applications. Owns rendering, geometry, APIs, CI/CD, and cross-language integrations while applying AI-assisted development practices. Investigates complex defects, mentors engineers, leads technical discussions, collaborates across product and manufacturing teams, and ensures compliance with medical device software quality processes.

Build and scale Nuitee’s flight infrastructure from a production product into reliable API-first platform services. Responsibilities include API design, caching volatile flight offers, modeling booking data, supporting booking changes, cancellations and refunds, integrating NDC and legacy GDS flows, and improving performance and reliability. This hands-on individual contributor role requires deep backend and API expertise, flight-domain knowledge, Python experience, and ownership in a small team.

Build and maintain ERP business management features across backend services, APIs, databases, and user interfaces. Develop reliable software, implement database models and schema changes, investigate issues, write tests, monitor releases, conduct code reviews, and communicate risks. The role requires professional software development experience and offers opportunities to grow into larger engineering responsibilities while working with technologies including Python, Django, React, PostgreSQL, AWS, and Kubernetes.

Build and ship healthcare software across the frontend, API, and database using React, TypeScript, Next.js, tRPC, Prisma, and related technologies. Own features end to end, prototype with AI tools, test with patients and care teams, and improve performance, accessibility, reliability, and scalability. Collaborate closely with company leadership in a fast-paced startup environment while developing trustworthy automation for healthcare delivery.

Build and ship healthcare software across the frontend, APIs, and databases. Own features end to end, write tested and maintainable code, prototype with patients and care teams, and use AI tools such as Cursor and Claude Code in daily development. Design scalable systems, improve performance, accessibility, and reliability, and contribute to trustworthy automation in a fast-paced startup environment.

Build, test, deploy, and maintain scalable web and mobile applications. Own features from concept through launch while collaborating with Product, Design, Data Science, and engineering teams. Apply automated testing, strong code quality practices, relational database and schema design expertise, analytical problem-solving, and user-focused design. Work within agile methodologies and contribute to continuous deployment, production monitoring, knowledge sharing, and ongoing engineering improvement.

Designs and builds Notabene’s Go-based transaction platform for secure, scalable, multi-tenant crypto transfers. The role focuses on distributed systems correctness, PostgreSQL performance, cloud infrastructure, observability, auditability, and regulated-data security. The engineer owns production operations, writes technical designs, reviews code, mentors teammates, collaborates with product and compliance teams, uses AI coding agents, and participates in on-call rotations.

Build and own agentic platform capabilities end to end, from architecture and implementation through production. Develop reliable, secure, cost-efficient systems for AI runtimes, evaluations, sandboxes, tool gateways, permissions, and agent workflows. Collaborate with Alaners, product teams, and operations; improve developer and user experience; mentor engineers; and contribute to product and engineering culture.

Design, build, and operate highly available backend communications systems across multi-region, multi-tenant environments. Develop messaging infrastructure, APIs, vendor integrations, observability, and resilient delivery services. Own technical goals, improve scalability and operational resilience, participate in on-call rotations, establish service-level objectives, and mentor engineers while collaborating with product, security, analytics, and engineering teams.

Design, build, maintain, and optimize scalable cloud applications for a global transportation platform. Collaborate with product and engineering teams to deliver features, ensure platform stability and security, write automated tests, resolve technical issues, document solutions, estimate effort, and provide third-level support. The role requires JavaScript and Node.js development experience, database expertise, containerized environments, and interest in AI-assisted development.

Design and build Go services for Telnyx’s serverless platform, function deployment pipeline, global control plane, and edge infrastructure. Own backend APIs, resource lifecycles, workload deployment, asynchronous workflows, observability, and reliability. Work with Kubernetes, distributed systems, relational databases, and multi-region services. Improve developer experience through APIs, CLI tooling, and clear error handling, while participating in on-call and diagnosing production performance and reliability issues.

Design and build full-stack user interfaces for Elastic Fleet and Streams using TypeScript, React, and Node.js. Own complex projects end-to-end, make architecture and system-design decisions, establish coding standards, conduct code reviews, implement testing and deployment, and collaborate with distributed teams, designers, and product managers. The role focuses on scalable, data-intensive observability interfaces and requires strong communication, user focus, and technical leadership.

Build and deploy production LLM-powered agents that resolve health insurance questions, use member data and tools, interoperate with other AI agents, and support real-time voice conversations. Own evaluation datasets, automated quality monitoring, safety guardrails, and production optimization for resolution rate, answer quality, satisfaction, cost, and latency. Collaborate with care experts and product teams while contributing to technical direction and mentoring engineers.

Design and build secure, scalable backend services for stablecoin issuance, including minting, burning, compliance controls, APIs, webhooks, audit trails, and smart-contract integrations. Develop event-driven microservices, ensure transactional integrity and operational reliability, and collaborate across engineering and financial crime teams. Provide technical leadership through architecture decisions, code reviews, mentoring, production ownership, monitoring, and incident response.

Lead hands-on engineering engagements with strategic enterprise customers to diagnose and resolve complex Windows deployment, management, update, application, performance, reliability, and security issues. Develop scripts, automation, tools, prototypes, and reusable solutions; collaborate with Windows and Intune engineering teams on product improvements; and translate customer-specific resolutions into scalable guidance, playbooks, and technical products.

Develop and enhance a live drive-thru Voice AI product through software engineering, AI/LLM prototyping and fine-tuning, conversation analysis, system integrations, and customer requirements gathering. Build, test, deploy, and improve production features while evaluating real dialogs and collaborating with customers and internal stakeholders.

Maintain and evolve FAdmin, a mission-critical Ruby on Rails flyer processing system, and related Content Platform tools. Deliver roadmap features end to end, support service desk requests, use AI coding agents to improve delivery and code quality, write automated tests, participate in code reviews, and maintain CI/CD pipelines. The role requires production software development experience, relational database and SQL expertise, and strong English communication.