Top Software Engineer Jobs in Valencia

Define and evolve system architecture, translate business needs into scalable solutions, drive architectural decisions, contribute hands-on to implementations, modernize monoliths, and promote engineering best practices across teams.

Design, implement, and maintain Firefox security and cryptography systems (WebPKI, cryptographic protocols, security-sensitive web APIs). Ship standards-based web platform features, diagnose and fix stability/performance/memory issues in a multi-threaded browser, and collaborate across teams on security design, debugging, and long-term solutions.

Senior full-stack product engineer owning features end-to-end: research customer problems, write product specs and wireframes, design and implement frontend and backend solutions, collaborate with product, design and infra, and ship high-quality, scalable features for tens of thousands of users.

Senior full‑stack product engineer owning large product areas end-to-end: research, specs, wireframes, implementation, and shipping reliable features. Collaborate with product, design, and infra; balance speed and quality; solve ambiguous customer problems and build scalable abstractions.

Design and build responsive, high-performance frontend applications with React/Angular while contributing to backend services in Java/Spring Boot. Lead frontend architecture, optimize performance and accessibility, mentor engineers, collaborate across teams, and support CI/CD and cloud deployments for scalable, user-centric products.

Build and ship browser-based 3D interactive features using React, Three.js, and WebGL; integrate frontend with a C++ computational backend on AWS; use AI tools (Claude Code) to accelerate development; prototype AI-powered product features; and collaborate with clinical scientists, UX, ML engineers, and QA.

Lead optimization of concurrent systems, scale backend microservices, and collaborate with developers and engineers on deployment for retail solutions.

Define and govern scalable embedded software test frameworks and SQA practices for Radio IC and SoC products. Drive reusable automation, CI/CD integration, traceability, quality metrics, defect analysis, and audit readiness while influencing cross-functional teams to improve testability and reduce defect escape.

Build and evolve the Elastic MCP server, agent skills platform, and developer-facing integrations (language clients, CLI, third-party integrations). Implement tooling, linting, and eval-backed correctness, collaborate with product and external partners, and contribute across Go/Rust codebases to improve developer experience and observability.

Improve reliability, observability, and scalability of Enode's connectivity layer. Build and maintain API integrations with OEMs and energy partners, reduce incidents, enhance monitoring and alerting, drive complex projects to release, uphold code quality and testing, collaborate with product, and mentor teammates while applying AI tooling strategically.

Design, implement, and optimize Elasticsearch core storage and query engine components for observability workloads. Lead architecture, resolve performance bottlenecks, mentor engineers, drive cross-organizational initiatives, triage community issues, and write idiomatic modern Java to improve indexing, storage efficiency, and query performance.

Design, implement, test, deploy, and maintain cloud-native full‑stack applications. Collaborate cross-functionally, follow software engineering best practices, use event-driven patterns, leverage AWS, participate in code reviews, troubleshoot issues, and improve CI/CD workflows.

Lead design and development of scalable, user-friendly iOS applications for clinical and customer use. Define technical architecture, implement and optimize features, build modular frameworks, ensure high quality via automated tests, apply Apple design and accessibility standards, and collaborate with cross-functional teams in agile processes.

Design, implement, and own end-to-end backend features in a Python-based, event-driven platform. Improve architecture for performance, reliability, and scalability, participate in design reviews, mentor peers, ensure CI/CD and testing best practices, and collaborate with Product and Data teams to deliver production-ready services.

Build and maintain Finance & Compliance services to calculate revenue, invoice partners and customers, automate tax reporting, and ensure scalable, reliable transaction processing. Design end-to-end features, participate in architecture, improve observability and performance, and mentor teammates while owning core components.

Lead the design and development of scalable backend APIs and services focusing on IBM Cloud, providing technical leadership and collaborating with cross-functional teams.

The Senior Software Engineer will collaborate in small teams to develop and maintain backend and frontend components, focusing on high-availability systems, writing tests, and continuous delivery on Google Cloud Platform.

Design, implement, test, and maintain cloud-first web applications. Build secure, maintainable code using event-driven architecture and cloud services (AWS/Azure). Collaborate with cross-functional teams, mentor junior engineers, and support CI/CD and PWA development.

Design, build, and harden Chromium-based browser components in C++ to power Menlo's AI/agent initiatives; apply networking and HTTP security expertise; integrate AI agents and MCP servers; build tooling in Python or Rust; deploy and operate cloud infrastructure (AWS/GCP, Kubernetes, Terraform); debug and optimize performance-critical systems; collaborate cross-functionally.

Design, build, and operate Threat Protection and ShadowAI services: scalable distributed systems and APIs that detect and control risky web and generative AI usage. Own features end-to-end, maintain availability and latency SLOs, write tests, perform code reviews, use AI-assisted tools, and collaborate with cross-functional teams to improve detection accuracy and production reliability.

Build and own backend integrations connecting Voxie's SMS platform to CRMs, POS, marketing tools, and messaging providers. Design scalable, testable serverless systems on AWS, handle high-throughput messaging, implement reliable API/webhook/SFTP/batch pipelines, and collaborate with sales, partners, and customers to scope and deliver integrations.

Provide organisation-wide technical leadership as a Staff Software Engineer: shape technical strategy, design scalable distributed systems, set engineering standards, mentor senior engineers, improve reliability/observability/CI-CD, and contribute hands-on to critical cloud-native payment systems.

Lead and own platform architecture across Infrahub ecosystem, implement high-impact architectural improvements, reduce technical debt, champion AI-first engineering, provide hands-on technical leadership, mentor engineers, and collaborate with product and leadership to ensure scalable, extensible systems.

Develop cloud-native production systems that process large data volumes. Engage in backend development with Rust and frontend with Angular. Collaborate on product development.

As a Senior Software Engineer, you'll design and build scalable market data systems, improve API architecture, and enhance overall system performance, contributing to Alpaca's infrastructure for trading financial assets.