Top Software Engineer Jobs in Spain

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.

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.

Design, develop, and optimize scalable, reliable software systems. Ensure quality, performance, and uptime; mentor junior developers; implement APIs, clean architectures, and distributed solutions; monitor metrics and gather stakeholder feedback to drive continuous improvement.

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.

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.

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.

Rover seeks a Lead/Senior Software Engineer with 7+ years of experience, specializing in frontend technologies like ReactJs and Python. Responsibilities include building customer-facing products, mentoring team members, and promoting engineering best practices. The role includes collaboration on projects and a commitment to inclusivity and diversity in the workplace.

The Senior Software Engineer role involves collaborating within a squad to enhance customer experiences through backend development, focusing on distributed systems and resilient software using various technologies.

Lead design and implementation of core Elasticsearch search and indexing capabilities. Research retrieval algorithms and data structures, define technical vision, mentor engineers, collaborate across teams, and optimize large-scale search and distributed systems for performance and relevance.

Lead design and implementation of vector similarity search features in Elasticsearch, improve relevance and performance, fix bugs, invent or implement algorithms/data structures, collaborate with a distributed team, review and triage community contributions, and write idiomatic modern Java.

Lead the development of software solutions for a logistics platform, overseeing technical strategy, mentoring teams, and ensuring high-quality software delivery.

Join the Engine team to build and maintain scalable backend applications in Ruby and GOlang, ensuring performance and reliability.

As a Senior Software Engineer, you will enhance our Affiliate Marketing platform through clean code, team collaboration, and mentorship, focusing on backend services and technical improvements.

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.