Top Software Engineer Jobs in Spain

Lead design, build and operate Ebury's high-volume multi-currency transactional platform. Own services end-to-end, translate product requirements into scalable systems, mentor engineers, collaborate globally, and improve observability, reliability, and payment flows.

Lead design, build, and operate Ebury's high-volume, multi-currency transactional platform. Own services end-to-end, translate payments requirements into scalable architectures, mentor engineers, collaborate with global teams, and ensure production reliability and observability.

Design, build, and optimize high-performance, scalable backend services. Work with event-driven architectures and streaming, ensure reliability under high concurrency, use observability and profiling tools, collaborate cross-functionally, own core components, review and mentor, and drive architecture and system improvements.

Build and operate geo-localized, multi-region backend services focusing on data residency, reliability, scalability, and privacy. Design and implement features, participate in architecture, work with event-driven systems, contribute to observability and CI/CD, and mentor peers while owning core components.

Build pixel-accurate UI from Figma and Claude-generated templates using TypeScript/React, and contribute to C# backend services/APIs. Establish AI-native workflows with Claude, implement telemetry, troubleshoot full-stack issues, and improve tooling and maintainability.

Build scalable, real-time fraud detection and risk engines for payments, wallets, authentication, and user activity. Develop event-driven pipelines, automated decisioning, and tooling for investigation and monitoring. Analyze transactional and behavioral data, design risk rules and dynamic scoring, optimize detection accuracy and latency, and collaborate with Product, Payments, Data, and Platform teams.

Design, implement, test, deploy, and maintain cloud-native full-stack features. Collaborate with cross-functional teams, follow software engineering best practices, participate in code reviews, troubleshoot issues, and leverage AWS and event-driven architecture to build scalable, maintainable applications.

Design and build highly scalable, low-latency market data systems and APIs. Implement backend services, influence architecture, maintain test coverage, participate in code reviews, troubleshoot incidents, and occasionally be on-call. Work spans streaming and historical market data endpoints and developer-focused API improvements.

Join Reedsy to develop and improve a collaborative word processor, adding features and ensuring performance and security for users.

The Senior Software Engineer will develop core business products, ensuring performance and scalability, and automate development processes while collaborating with stakeholders.

Lead architecture and technical direction for enterprise SaaS microservices. Contribute hands-on to critical code, design scalable distributed systems, ensure reliability and security, mentor engineers, and collaborate cross-functionally to align technical solutions with business goals.

Design and implement core Web3 protocol features and secure smart contracts in Solidity. Integrate blockchain solutions with cross-functional teams, ensure scalability and performance, stay current on EVM internals, conduct code reviews, and mentor junior engineers.

Design and implement a video processing engine, develop a cross-platform rendering engine, integrate systems, and optimize performance while collaborating with other engineers.

Lead rapid prototyping, architectural research, and complex technical projects for a Kubernetes virtualization platform. Partner with the CTO to shape product direction, integrate new technologies, and occasionally engage customers to translate needs into engineering solutions. Provide technical leadership beyond coding and mentor the team.

As a Principal Forward Deployed Engineer, you'll deploy JetBrains Central in enterprise environments, implement AI governance, mentor teams, and advise customers on AI-native development best practices.

Develop core backend components for a blockchain network, focusing on reliability and scalability, mainly using Rust. Ensure code quality through testing and debugging.

The Senior Full-stack Engineer will design and build features in TypeScript, driving projects with a product mindset and collaborating in a dynamic startup environment.

The Staff Software Engineer will lead technical direction, improving system design and mentoring others while writing code and collaborating across teams for a cloud-based generative coding platform.

Develop and maintain mobile app and no-code quest editor, implement gameplay engine and server, design software architecture, and collaborate in one-week Scrum sprints using C++, Qt, QML, MySQL, and AI-assisted tools.

As a Fullstack Software Engineer at Amplemarket, you will design and build features for our AI-powered sales platform, collaborating with co-founders and cross-functional teams to enhance user experience and solve complex problems.

As a Frontend Software Engineer, you will build user interfaces for Amplemarket's sales platform, collaborating with co-founders and cross-functional teams to enhance product usability and user experience.

Amplemarket seeks a Senior Backend Software Engineer to build reliable backend systems, design APIs, collaborate cross-functionally, and drive product development.