Top Software Engineer Jobs in Spain

As a Senior Product Software Engineer, you will design, develop, and maintain software applications, collaborate with teams, optimize performance, and provide technical support.

The Senior Product Software Engineer will design, develop, and optimize software applications, collaborate with teams, and provide technical support to enhance user experience.

Lead the architecture and development of software platforms for T&D systems, ensuring security, performance, and integration while mentoring a team and collaborating across functions.

In this role, you'll translate product requirements into technical specifications, architect changes, write high-quality Python code, mentor junior engineers, and oversee AI coding agents while monitoring application performance and logs.

The Software Quality Engineer will execute manual and automated tests, document defects, enhance testing processes, and collaborate in an agile environment to ensure software quality for macOS applications.

The Sr. Software Developer will design, develop, and deliver features for a Mobile Application Security Platform, focusing on both frontend and backend systems. Responsibilities include building scalable services, writing maintainable code, and collaborating with cross-functional teams to enhance product performance and usability.

The Senior Software Engineer will develop backend services for Workbot, engage in research, contribute through the development lifecycle, and enhance existing systems.

Design, build, and maintain APIs and systems at Telnyx, debug production issues, improve engineering standards, and collaborate across teams.

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.

Build and own end-to-end features across Sona’s platform using AI-assisted development. Direct and correct agent-produced code, work cross-functionally, engage customers in discovery and workshops, and contribute across scheduling, payroll, HR, and mobile domains.

The Embedded Software Engineer will develop and verify embedded software, drive product development, and collaborate with cross-functional teams to ensure high-quality software solutions.

The Embedded Software Engineer will develop embedded software, manage design and architecture decisions, and collaborate with teams to ensure high-quality software delivery.

The Embedded Software Engineer will develop and verify embedded software products, lead design decisions, collaborate with teams, and ensure high-quality delivery.

Own and improve core scraping and job-execution infrastructure for high-throughput distributed workloads. Design fault-tolerant, observable systems, lead reliability and scaling efforts, define SLAs, run incident response, mentor engineers, and contribute to architecture decisions to maximize throughput and platform availability.

The Senior Software Engineer will contribute to product development, technical decisions, and help scale the company through clean and efficient coding in a collaborative environment.

Build and architect Alpaca's advisory services (block trading, portfolio management, IRA). Design scalable, low-latency distributed systems, write full-stack code, optimize throughput, work with messaging systems and OMS, and implement high-availability, concurrency-safe solutions for financial trading/exchange workloads.

Build and maintain core post-trade clearing systems and securities-finance infrastructure. Own projects end-to-end, design reliable distributed services and RESTful APIs, integrate new clearing partners, participate in on-call rotation, and improve systems to enable new product offerings.

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.

Design, deliver, and maintain reliable Java microservices for finance core and reconciliation. Define engineering standards, improve repositories, drive automation to reduce manual reviews, mentor teammates, and ensure correctness, scalability, and auditability of financial logic.

Lead design and implementation of highly available, resilient, and scalable customer-facing systems and APIs. Drive cloud-native architectures (AWS/Azure), integration patterns, observability, CI/CD/DevSecOps, incident response, performance and chaos testing. Influence technology roadmap, mentor engineers, and evaluate new technologies including GenAI to enhance system resilience and scale.

Design and build end-to-end customer-facing banking solutions in a greenfield squad. Develop, test, deploy, and support full-stack microservices using cloud-native tools, collaborating with Product and Design to solve complex problems and improve everyday banking experiences.

Build and operate .NET/Python microservices and secure APIs on AWS to deliver AI-enabled risk platform features. Contribute to architecture, CI/CD (GitHub Actions, ArgoCD), observability (Grafana, Prometheus, PagerDuty), and agentic AI integrations (LLM APIs, agent frameworks). Collaborate with product, data scientists, and platform teams to produce reliable, testable, and secure production systems consuming cloud data products.

Lead design, build, and operation of AI-enabled risk platform services using .NET/Python on AWS. Drive architecture, CI/CD (GitHub Actions/ArgoCD), observability, secure APIs, and agentic AI integrations. Provide hands-on technical leadership, mentor engineers, and ensure compliance, reliability, and scalable production readiness across microservices and data-driven features.

Design, build and run scalable, customer-facing backend and full-stack applications for the home loan journey. Work across product discovery to deployment, apply cloud and AI-assisted tooling, contribute to platform modernisation, mentor engineers, and collaborate with Product and Design to deliver seamless, high-impact lending experiences.

Lead technical strategy and architecture for a large eCommerce payments platform. Provide cross-squad leadership, define platform standards, drive scalability, reliability, security, and operability, mentor senior engineers, and guide platform migration from vendor-managed solutions to in-house capabilities.