Top Software Engineer Jobs in Madrid

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, 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.

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.

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, build, and maintain RESTful, asynchronous microservices and APIs for internal and external customers. Optimize service performance at scale, deliver high-quality code reproducibly, and evolve the Service Delivery platform while collaborating across teams to drive features to completion.

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.

Design and develop services for automating work with a large server fleet while engaging in DevOps processes.

Develop reliable cloud services on the hyperscaler platform, contributing to cloud infrastructure, databases, and monitoring systems. Must write reliable code with team-oriented skills.

Design and develop services for monitoring servers, improve metrics pipelines, automate maintenance workflows, and investigate incidents to ensure infrastructure reliability.

Develop and maintain Autodesk Fusion's API. Responsibilities include defining API, code reviews, mentoring, and collaborating with teams to improve service quality.

As a Senior Software Engineer for Application Core Services at Grafana Labs, you will design and maintain critical systems, improve workflows, and integrate internal services with third-party platforms to support business operations and customer lifecycle.

The Senior Software Engineer will lead the development of a Python-based platform, enhancing a mature system for open-source collaboration, mentoring teams, and driving innovation.

As a Senior Software Engineer, you will lead your team in shipping features, making technical decisions, and mentoring others to scale products effectively.

As a Go Software Engineer for Identity Management, you will design, implement, and enhance identity management solutions, collaborate with a distributed team, and contribute to the development of authentication and authorization systems.

As a Senior Blockchain Engineer, you will design and optimize smart contracts and blockchain infrastructure, collaborate with teams to ensure secure solutions, and lead development efforts in the DeFi ecosystem. You will analyze technologies, mentor staff, and enhance performance while maintaining security best practices.

The role involves designing and implementing Python services and AI solutions, leading technical engagements, and mentoring engineers. Responsibilities include production-level coding, architecture decisions, and client interaction.

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.

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