Top Software Engineer Jobs in Barcelona

Build, maintain, and scale backend services for a high-volume distributed ingest and processing pipeline. Integrate AI agents into engineering workflows, create automation and tooling, collaborate with product teams, participate in on-call rotations, and champion observability and continuous workflow innovation.

Student internship to gain software engineering experience: research new technologies, solve customer problems, collaborate with teams, integrate solutions into XProtect products, and contribute to feature development and test automation within a multicultural development team.

Build and maintain front-end features and developer-facing tooling for New Relic One using modern JavaScript/TypeScript. Select frameworks, produce performant CLI tools, automate developer tasks, collaborate on UI best practices, and implement CI pipelines and testing.

Build scalable backend systems and data pipelines to power consumer credit reporting. Partner with Product, Compliance, Servicing, and Credit teams to design, deliver, monitor, and operate accurate reporting systems, including on-call responsibilities. Develop robust, well-tested code in Python or Kotlin using distributed systems patterns and technologies like AWS, MySQL, and Spark.

Work on Servicing International building purchase protection (disputes/refunds) and agent tooling. Contribute to web apps and backend APIs, collaborate with global teams, participate in on-call rotation, ship reliable scalable solutions, and engage in code reviews and growth activities.

Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, design and run experiments (A/B tests and AI evaluations), implement AI infrastructure for reliable LLM inference, and iterate quickly to scale production-ready LLM-powered products.

Design, build, and scale backend services for a high-volume distributed tracing pipeline. Work on distributed system challenges, create automation and tooling, participate in architecture, collaborate with product teams, use DevOps practices and on-call rotations, and apply AI tools to accelerate development.

Design, build, and maintain backend collections systems to manage delinquent loans. Collaborate with product, risk, and engineering teams, deliver features in phases, support operations and on-call rotation, instrument monitoring, and participate in hiring and team growth.

Build and maintain backend collections systems to manage delinquent loans, implement recovery strategies, ensure high availability and reliability, collaborate with product and risk teams, participate in on-call rotation, write well-tested extensible code, and contribute to team growth.

Seeking a Full-Stack Software Engineer to build the core of an Agentic AI Platform. Responsibilities include frontend and backend development, product design collaboration, and infrastructure management with a focus on clean, maintainable code.

Design and implement features for scalable games, ensuring quality, performance, and security, while collaborating in an agile environment.

Design and build scalable backend services using Node.js and MongoDB. Collaborate with teams for technical solutions, and ensure reliable architecture with clean code.

Design, build, and maintain scalable, low-latency backend services using Node.js and AWS (EC2, Lambda). Implement event-driven architectures with SQS/SNS, use DynamoDB for high-performance data, develop RESTful APIs, monitor and optimize performance, and participate in code reviews and cross-functional collaboration.

Build and maintain the software backbone for an industry-leading visual SLAM system: write high-quality C++/Python code, implement performance optimizations, develop automated integration and benchmark tests, create tooling for logging/KPI tracking and data analysis, and collaborate with SLAM experts to integrate and validate algorithmic components.

Develop, prototype, and deploy sensor calibration algorithms and tooling for autonomous mobile robots. Write and maintain high-quality C++, Python (and Rust) code, debug calibration issues, perform root-cause analysis, and deploy solutions on ARM64 SoCs while collaborating with global teams and SLAM experts.

Student intern will develop software engineering skills by researching technologies, collaborating with teams, solving customer problems, and helping design and integrate features for XProtect. Work includes hands-on experience with object-oriented programming, databases, containerization, CI/CD, and test automation within a multicultural development team.

As a Software Engineer, you'll design and develop software solutions, solve technical problems, lead projects, and collaborate with product and operations teams.

Own and deliver backend identity systems for international markets, shaping technical direction, designing distributed, highly available services, and collaborating with product, design, and analytics. Improve reliability, performance, and operational health; participate in on-call rotation; set code and design standards; mentor and grow engineers; reduce toil and create runbooks/playbooks. Drive cross-team collaboration to meet regulatory and market-specific identity/KYC requirements.

Build production-grade machine learning systems that connect data pipelines to user-facing software. Design robust system architecture, implement model inference, ship resilient full-stack/cloud services, and collaborate on UX-driven solutions using Python, APIs, and AWS.

As a Staff Platform Engineer at Joko, you will lead platform efforts, ensure infrastructure reliability, enhance developer experience, and optimize costs, focusing on security and scalability while collaborating across teams.

The Software Engineer will join a product squad to develop and maintain functionalities on the 360Learning platform, focusing on JavaScript technologies and clean architecture.

Senior engineer owning feature lifecycle: design, architecture, implementation, reliability, and cross-team impact. Lead architecture, SRE/observability, security practices, mentor engineers, and drive product-technical alignment using AI-augmented workflows.

Develop and maintain multi-platform motion control and communication libraries and GUIs for servo drivers. Implement advanced identification and tuning algorithms, optimize performance, produce internal architecture and design documentation, define test plans with QA, and collaborate closely with firmware teams to deliver robust motion control products.

Lead and deliver Repayment UX features for Affirm's mobile products using React Native. Own quarterly goals, guide engineers through ambiguous problems, collaborate with product/design/analytics, ensure operational reliability (metrics and on-call), improve engineering standards, and mentor teammates to drive high-quality, scalable mobile experiences.

As a Senior Engineer, you'll develop scalable, event-driven backend architectures, design low-latency APIs, and contribute to product development across the stack while optimizing performance and collaborating on AI features.