Top Software Engineer Jobs in Barcelona

Design, build, and scale a Kubernetes-based internal platform for managed cloud products. Develop highly available and fault-tolerant production services using Kubernetes and cloud-native technologies, contribute to enterprise platform roadmaps, integrate infrastructure technologies, establish engineering best practices, mentor teammates, and collaborate across Agile engineering teams.

Designs and improves automated testing strategies across unit, integration, system, and end-to-end levels. Develops Java-based tests, investigates defects, creates test plans, and performs exploratory, performance, chaos, and load testing. Integrates testing and static analysis into CI/CD pipelines, maintains containerized test environments, monitors quality metrics, and partners with development, DevOps, QA, and business teams to improve software quality and coverage.

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

Build full-stack infrastructure, developer tools, frameworks, and user-facing interfaces that improve engineering productivity and operational excellence. Work across Python/Flask, React, React Native, and PostgreSQL in a monorepo, contributing to design systems, accessibility, security, cloud infrastructure, CI/CD, observability, and AI-assisted development. Partner closely with product teams, own solutions end to end, and help create a scalable, secure engineering environment.

Design, implement, and optimize scalable application networking features (Ingress, DNS, private connectivity) for Elastic Cloud. Integrate security controls, conduct load and performance testing, troubleshoot network incidents, build tracing tools, and collaborate with cross-functional teams to meet application networking needs and improve observability and operability.

Leads the design, development, testing, optimization, troubleshooting, and maintenance of complex full-stack software applications. Collaborates with cross-functional teams, documents technical requirements, resolves IT issues, supports end users, and applies modern engineering practices including microservices, APIs, cloud messaging, CI/CD, containers, Kubernetes, monitoring, and Agile methodologies.

Leads the design, development, maintenance, testing, troubleshooting, and optimization of complex full-stack software applications. Collaborates with cross-functional stakeholders, prepares technical documentation, resolves technical issues, supports end users, and preprocesses data. The role uses C#, .NET, Angular, APIs, microservices, relational databases, messaging systems, CI/CD, containers, monitoring tools, and Agile practices.

Leads the design, development, maintenance, testing, optimization, and troubleshooting of complex full-stack software applications. Collaborates with cross-functional stakeholders, produces technical documentation, prepares data, resolves IT issues, and provides end-user support. The role requires advanced C# and .NET expertise, Angular, APIs, microservices, databases, messaging systems, cloud-oriented engineering practices, CI/CD, containerization, monitoring, and Agile methodologies.

Develop Rust and Go control-plane microservices, Kubernetes operators, and reconciliation engines for AI infrastructure. Design APIs and architecture specifications, integrate datacenter networking operating systems and DPU platforms, instrument distributed systems with OpenTelemetry, and perform diagnostics and testing. The role requires strong Rust, Kubernetes, concurrency, distributed systems, gRPC/Protobuf, and architecture skills, with desired expertise in networking protocols, bare-metal provisioning, DPUs, Linux systems, security, and virtualization.

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.

Senior full-stack engineer building AI-powered digital products. Work across full-stack environments using TypeScript and React, leverage AI tools and LLMs, design agent-based integrations, collaborate cross-functionally, adapt to shifting priorities in fast-paced teams.

Join the Backend Platform team to manage and scale Rover's datastores (Postgres/MySQL on AWS RDS), lead upgrades, design backups, build self-service automation (Terraform, Python), monitor systems (Datadog/CloudWatch/Splunk), participate in on-call rotation, and collaborate with product and engineering teams on migrations and performance tuning.

Design, build, and maintain production SaaS products that transform public web data into market intelligence. Develop AI- and LLM-based capabilities, modernize legacy systems toward scalable event-driven architectures, and work with distributed systems, cloud infrastructure, and domain-oriented design. Own projects from discovery through continuous improvement, collaborate across technical and customer-facing teams, improve engineering practices, and mentor less experienced engineers.

Own availability and performance of mission-critical services, improve scalability and observability, build platform tooling, practice sustainable incident response, participate in on-call rotation, collaborate with product teams, and follow FinOps best practices.

Staff Backend Software Engineer responsible for setting technical strategy, designing and launching highly available distributed systems, and delivering business-critical identity capabilities for international markets. The role involves cross-functional collaboration, system architecture, operational ownership, monitoring, on-call support, code quality standards, technical communication, and mentoring engineers.

Develop and architect features for Malwarebytes Browser Guard, serving millions of users. Write high-quality, tested code; design integrations; collaborate with Product, UX, and QA; review code; mentor engineers; and support delivery of the product roadmap. The role emphasizes React, JavaScript/TypeScript, Go, debugging, system architecture, AI workflows, user-centric design, and strong communication.

Lead the Search team’s technical direction while designing, scaling, and operating search APIs, semantic retrieval systems, ranking pipelines, and vector search infrastructure. Partner with product and brand stakeholders, mentor engineers, manage Terraform and Chef infrastructure, maintain Jenkins CI/CD, deploy Docker and Kubernetes services, and own reliability, observability, SLOs, and incident response. Champion AI-assisted development practices across the team.

Design, build, and improve distributed clearing and securities-finance systems supporting brokerage products. Own projects from ideation through deployment, develop reliable APIs and integrations, refine existing infrastructure, and participate in on-call operations. The role requires strong systems fundamentals, attention to detail, financial-markets interest, and ownership of production systems handling customers’ money.

Develop and maintain Java backend applications using TDD and clean code principles, participate in full SDLC within Agile/Scrum teams, design technical solutions, deliver sprint increments, support component consumers, and improve team practices.

As an AI Software Engineer, you will lead AI software projects, mentor colleagues, collaborate with stakeholders, and drive best practices in software engineering.

Develop features for the AI platform, create API endpoints, debug issues, perform code reviews, and maintain documentation, while working in a collaborative environment.

Build and scale Base360.ai’s short-term rental platform, including customer-facing applications, APIs, automation engines, AI-powered workflows, third-party integrations, and cloud infrastructure. Develop systems for reservations, pricing, payments, guest communication, property operations, reporting, and financial workflows. Own projects end to end, make architectural decisions, ensure reliability, and deliver scalable products in a remote-first startup environment.

Staff Software Engineer responsible for architecting and developing scalable web applications and APIs using Elixir, React, and PostgreSQL. The role involves solving ambiguous technical and business problems, ensuring system reliability and performance, collaborating cross-functionally, presenting solutions to leadership, writing tested code, participating in code reviews, mentoring engineers, and removing technical roadblocks.

Design and implement backend card-platform features covering tokenization, sensitive card data, transaction enrichment, settlement, issuer integrations, and payment processing. Architect scalable, secure, PCI-compliant microservices; own projects end-to-end; contribute to shared infrastructure; review code; mentor teammates; and participate in on-call support. The role requires Java, Spring Boot, API and microservices expertise, card-payments knowledge, Docker, Kubernetes, and strong independent collaboration skills.

Lead the design, development, maintenance, testing, optimization, and troubleshooting of complex full-stack software applications. Collaborate with cross-functional teams, document technical requirements, resolve issues, prepare data, support users, and develop reliable APIs and microservices. Apply C#, .NET, Angular, SQL, messaging systems, cloud-native engineering practices, CI/CD, containerization, monitoring, and Agile methodologies while helping establish responsible AI-enabled engineering workflows.