Top Software Engineer Jobs in Portugal

Build scalable software for agent-web interactions, including edge services, data pipelines, protocol integrations, developer tools, content controls, and analytics. Develop support for MCP and related emerging standards, ensuring secure, reliable, high-performance systems. Collaborate with engineering, research, product, design, and other stakeholders to take concepts into production while evaluating AI-agent interactions with websites and applications.

Design and build LLM-based autonomous security agents and self-healing remediation pipelines. Integrate AI-driven threat detection into CI/CD and GitOps workflows, automate vulnerability research, patching, and security orchestration across cloud-native infrastructure.

Software Engineering Interns will build and ship projects affecting Cloudflare’s global Internet network during a 12–14 week, full-time internship. Responsibilities include collaborating cross-functionally, working with mentors, presenting projects, developing software at Internet scale, and participating in professional development and company networking activities.

Build full-stack developer-experience tools for Superhuman Docs. Responsibilities include creating internal platforms, improving CI/CD and deployment workflows, streamlining local development and testing, optimizing Bazel-based builds and Kubernetes infrastructure, documenting golden paths, and measuring developer productivity. The role partners closely with engineers, business-unit leaders, and the central platform team to translate developer friction into roadmap priorities and deliver reliable, high-velocity engineering workflows.

Architect and build resilient, high-throughput services for agentic web discovery, content transformation, indexing, tool calling, and generative interfaces. Define emerging agent protocols and technical standards, write architectural specifications, shape product roadmaps, improve observability and reliability, lead incident response, and mentor engineers. Partner with product teams, customers, and stakeholders while driving technical governance, hiring, and engineering process improvements across Cloudflare.

Build and operate Python services, pipelines, command-line tools, and integrations for vulnerability assessment, patching, testing, and security advisory publication. Responsibilities include production ownership, API integration, asynchronous processing, CI/CD automation, containerized deployments, monitoring, troubleshooting, data modeling, code review, and automated testing. The role collaborates with stakeholders and uses AI coding agents in daily development.

Design, develop, deploy, monitor, and maintain Java/Kotlin microservices powering MobileID and digital identity wallet solutions. Build REST APIs, run services on Kubernetes, contribute to delivery platforms and architecture decisions, and strengthen authentication, security, and key-handling capabilities. The role owns services end to end in production and involves collaboration across engineering teams.

Maintain and evolve FAdmin, a mission-critical Ruby on Rails flyer processing system, and related Content Platform tools. Deliver roadmap features end to end, support service desk requests, use AI coding agents to improve delivery and code quality, write automated tests, participate in code reviews, and maintain CI/CD pipelines. The role requires production software development experience, relational database and SQL expertise, and strong English communication.

Build and operate full-stack systems for an AI-powered offensive security platform. Responsibilities include developing React frontends, TypeScript APIs, Kotlin and Go backend services, deploying on AWS, designing scalable systems, optimizing databases, supporting production, and owning features from concept through deployment. The role involves close collaboration with AI and security researchers in a fast-paced remote startup.

Develop and maintain automated tests for Veeam products, enhance testing frameworks, design and implement tests, analyze source code and results, manage defects, support testing systems, and build testing infrastructure. The role requires C# programming, Windows or Linux experience, collaboration with international teams, and strong analytical and coding skills.

Develop and maintain automated tests for Veeam products, enhance testing frameworks, analyze source code and test results, manage defects, and support testing infrastructure. Collaborate with software development teams while working with Python, PowerShell, C#, CI/CD tools, and test management platforms.

Build AI-powered observability features across Kibana user interfaces, agentic investigation systems, telemetry detection pipelines, and evaluation infrastructure. Develop tools for autonomous root-cause analysis, shape reasoning context, generate detection signals, assess agent output quality, and collaborate with UX, product, and data science teams.

Design, build, and deploy LLM-based autonomous security agents and self-healing remediation pipelines. Integrate AI security tooling into CI/CD, automate vulnerability research, testing, and patch deployment, and create real-time threat mitigation via WAF/service-mesh rule updates and orchestration across security scanners.

Develop and maintain Elasticsearch’s Inference API and plugin framework, integrating internal and external machine learning providers. Responsibilities include API and protocol design, streaming, asynchronous execution, rate limiting, billing integration, error handling, open-source contribution review, incident response, and comprehensive unit, REST, and rolling-upgrade testing. The role requires strong Java expertise, concurrency knowledge, API design skills, collaboration across distributed teams, and autonomous decision-making.

Develop and maintain Reachdesk’s SaaS gifting platform across backend and frontend systems. Build APIs, MCP services, integrations, and responsive interfaces using Ruby on Rails, Python, SQL, React, and JavaScript. Apply AI-assisted development, automated testing, CI/CD, monitoring, logging, incident response, and performance optimization. Collaborate with product, design, engineering, and business teams while diagnosing production issues and contributing to technical decisions.

Develop and scale backend services for a financial referential data platform using Java 21 and Spring. Build APIs and microservices, integrate external data sources, support data ingestion, and apply cloud, Docker, CI/CD, testing, and quality practices. Collaborate with business and technology stakeholders, participate in Agile ceremonies, and contribute to scalable architecture and continuous improvement.

Develop and maintain scalable, stable, secure, and user-friendly software in an agile environment. Collaborate with engineers, support teams, and customer representatives across product development. Solve complex technical problems, write maintainable code, participate in testing and release cycles, and contribute across backend and frontend development while working independently in a remote setting.

Build, test, debug, and maintain query execution engine components in Java, including query operators, expression evaluation, scheduling, memory management, and resource management. Investigate correctness, reliability, and performance issues using logs, telemetry, benchmarks, and query profiles. Collaborate with senior engineers, write unit and integration tests, participate in code reviews, and develop expertise in vectorized processing, concurrency, parallelism, data exchange, and disk spilling.

Build and maintain Python backend services, versioned APIs, data pipelines, and React/TypeScript internal applications. Design ClickHouse analytics models, implement authentication and authorization, and deploy services to Kubernetes across Azure and AWS using Helm, CI/CD, and GitOps. The role also involves automated testing, API contracts, platform tooling, multi-tenant SaaS security, and collaboration with product and engineering stakeholders.

Design and operate large-scale PKI and cryptographic infrastructure, including certificate lifecycle management, X.509 issuance, HSM integration, ACME automation, revocation, Certificate Transparency, audit logging, and post-quantum migration. The role requires secure distributed-systems engineering, production ownership, compliance with WebPKI standards, incident response, technical writing, cross-functional collaboration, and mentoring.

Lead the architecture and development of high-performance, secure, scalable frontend applications using React and Next.js. Establish testing strategies with unit, integration, end-to-end, TDD, and shift-left practices. Optimize Core Web Vitals, SEO, accessibility, and user experience while providing technical leadership, mentoring, and architectural direction within Agile Scrum or Kanban teams.

Develop and maintain Reachdesk’s full-stack SaaS platform, including backend systems, integrations, APIs, MCP services, and responsive web interfaces. Use Ruby on Rails, Python, SQL, React, and JavaScript while applying AI-assisted development, automated testing, CI/CD, monitoring, incident response, and performance practices. Collaborate with product, design, engineering, and business teams to deliver scalable, reliable, accessible features.

Architect, develop, and scale cloud services, dashboards, and data pipelines to support robotics and autonomous vehicle telemetry. Integrate IoT devices with Azure services, build APIs/microservices, implement observability and CI/CD, validate systems in lab and field, and mentor junior engineers.

Develops and maintains cloud-first and on-premises software solutions within a collaborative engineering squad. Responsibilities include writing clean C# and .NET code, unit testing, participating in peer review and CI/CD, designing solutions, maintaining documentation, following security standards, and collaborating across international teams. The role also involves learning modern engineering practices, Azure technologies, event-driven architectures, and AI-assisted development tools.

Design, implement, and maintain distributed software systems supporting Cloudflare’s application security products, including Rate Limiting and Web Application Firewall. Participate across the software development lifecycle, write automated tests, monitor production deployments, debug complex systems, review code, collaborate with security and infrastructure teams, and mentor colleagues. The role involves Rust and Go development, databases, Docker, Kubernetes, and maintaining reliable, fault-tolerant systems at scale, with possible on-call responsibilities.