Top Software Engineer Jobs in Valencia

Design and build scalable backend systems for PlanetScale's database platform (Vitess/Postgres), collaborate on distributed systems challenges, work autonomously and with customers, optimize performance, and mentor engineers while operating systems at production scale.

Design and implement complex customer-facing frontend features using TypeScript and React. Provide technical leadership, mentor junior engineers, drive frontend architecture and best practices, improve performance and accessibility, partner with product/design, integrate with backend APIs, and manage technical debt and scalability.

Design, develop, and maintain scalable Python/Django backend services and RESTful APIs for financial products. Implement data models, write tests, optimize performance, ensure availability and security, participate in code reviews, and collaborate with cross-functional teams to deliver features and maintain production systems.

Design, implement, and operate scalable, multi-cloud distributed infrastructure and core services (TypeScript, Kotlin, Go). Optimize compute, storage, networking, and observability; support event-driven architectures; own end-to-end deployment and production reliability; implement disaster recovery and business continuity; collaborate with engineering, AI and security researchers to enable high-velocity product development.

Contribute to desktop and cloud reality-capture software by implementing features and bug fixes in C++. Write clean, tested code, assist debugging, participate in code reviews and Agile ceremonies, and use tools like Git, JIRA, and CI/CD while learning from senior engineers.

Build and iterate on practice-first learning experiences and AI tutor features. Contribute to architecture, review code, debug and unblock teammates, and collaborate closely with Product and Design to deliver high-quality learning products.

Design, build, and optimize high-performance AI infrastructure systems to support intelligent agents, ensuring reliability and scalability for millions of users.

Build and own end-to-end payments and financial systems for salon partners: reconciliation, invoicing, transaction history, pay-ins/payouts, and internal tooling. Work across backend (Java/Spring Boot) and frontend (React/TypeScript), ensure platform reliability, support ops/compliance teams, and drive data-informed experiments.

Design and implement scalable backend services and APIs with tight AI/LLM integration. Collaborate with product and data science teams to operationalize models, deploy microservices (Docker/Kubernetes), maintain CI/CD and reliability, mentor junior engineers, drive technical best practices, ensure security and compliance, and lead feature development and documentation.

Design, implement, and maintain scalable backend services and APIs with LLM/AI integration. Collaborate cross-functionally to operationalize AI models, lead projects, mentor engineers, ensure reliability, security, and CI/CD-driven deployments, and drive technical best practices.

The role involves architecting and developing cross-platform libraries in Rust and other languages, contributing to both mobile and web applications. Responsibilities include delivering complex features and ensuring a cohesive user experience across platforms.

The Staff Tech Lead Software Engineer will drive technical vision, mentor teams, oversee code quality, and facilitate collaboration between engineering and product teams.

The Junior Software Developer will collaborate on a cloud-native monitoring stack, developing features, debugging, and representing Canonical at events.

As a Senior Software Engineer, you will develop and manage a MongoDB solution on various platforms, ensuring reliability and security while contributing to a small team focused on impactful projects.

Join a remote EU-based game studio talent pipeline as a senior C++ engineer working in custom engines or UE5. Maintain and develop game features and tools, collaborate across disciplines, and regularly debug, profile, and optimize code. Candidates may be contacted for future openings and will complete a technical test.

The Senior Software Engineer will build integrations with external APIs, optimize code performance, and maintain testing protocols. A focus on backend development is essential.

As a Software Engineer - Scraping Specialist, you'll create systems for AI to access web data, develop automation frameworks, and collaborate on real-time data integration for AI agents.

Develop high-quality code for Fusion, troubleshoot technical issues, engage in agile practices, and mentor junior engineers. Collaborate on design and architecture while ensuring security and best practices.

The Senior Software Engineer will design and implement card platform features, maintain integrations, architect scalable systems, and mentor team members.

As a Software Engineer at Alan, you will develop a full-stack health platform that leverages AI for personalized health insights, integrating various data sources and creating a mobile-first experience that enhances user engagement and optimizes health management.

Build and deploy AI-driven applications, collaborate with teams, empower users with data insight, drive continuous improvement, and contribute to team growth.

The role is for a Graduate Software Engineer to join the Backend team, focusing on software development and learning in a fast-paced environment.

Design, build, and maintain cloud-native .NET applications using event-driven architectures and message brokers. Implement strong SQL-backed data models, IaC, and CI/CD pipelines. Prioritize observability and scalable system design while mentoring junior engineers and leading small initiatives. Communicate effectively in English.

Lead design and ownership of shared libraries, Spring Boot starters, and agentic frameworks. Set standards for agent orchestration, evaluations, and guardrails. Mentor teams on Python-based agents (LangChain/LangGraph), drive adoption, prototype research directions, and improve developer experience across Kotlin backend and client libraries.

The Senior Software Verification Engineer will verify embedded software for datacenters, ensure quality and reliability, and automate testing using Python. Responsibilities include developing test specs, conducting root cause analysis, and applying software industry best practices.