Top Software Engineer Jobs in Portugal

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 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.

As a Software Engineer, you'll develop an AI agent platform for productivity apps, focusing on AI integration to enhance user experiences.

Lead design and development of low-level Linux instrumentation and runtime security technologies (eBPF) to detect threats and protect cloud-native workloads. Build reusable monitoring for process, file, and network visibility, drive end-to-end feature delivery, establish testing methodologies for reliability and performance, partner cross-functionally, and provide technical leadership and mentoring.

The Senior Software Engineer will enhance the REDAPL platform by building a query engine, leading projects, and driving architectural decisions while collaborating with product teams.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

Design, build, and operate security integrations and detections (WAF, RASP, API security, IAST, SCA) across Datadog tracing libraries (.NET/Java focus). Take features from prototype to production, monitor telemetry, debug cross-system issues, shape roadmap, collaborate with product and platform teams, and mentor peers to improve code quality and adoption.

Develop and maintain scalable microservices and APIs in an agile environment. Design integrations, ensure data integrity and security, participate in code reviews, CI/CD, testing, and collaborate with product and other engineering teams.

Build and maintain backend platform components for a SaaS transaction monitoring product. Implement orchestration features, large-scale data migrations, and scalable APIs/data pipelines. Participate in scrum teams, drive technical and architectural decisions, write tests, own production systems, and collaborate with ML engineers and data scientists.

Design and evolve backend e-commerce platform and microservices, ensure performance and scalability, create new services, mentor teammates, collaborate cross-team, and use .NET, SQL Server, MongoDB, Kafka, Docker, and Kubernetes.

Build and maintain integrations for North's agentic platform, own the end-to-end integration pipeline, create evals and tests to ensure reliability, tune tool descriptions, and help other engineers add and maintain integrations while using AI responsibly to improve performance and quality.

Join the team building Feedzai's Risk Engine to evaluate and score transactions in real time. Develop high-performance, low-latency backend services, participate in full SDLC, code reviews, cloud-native SaaS architecture, and on-call rotations. Collaborate with product and data science to design distributed systems and improve production reliability.

The Senior Frontend Product Software Engineer (React) will enhance the Kyte product by executing software development tasks, optimizing performance, collaborating with teams, mentoring, and establishing best practices in frontend development.

The Lead Product Software Engineer will develop and optimize the Kyte product using Go, collaborate with teams, mentor engineers, and establish best practices.

Design and build cloud-native, event-driven backend services in Java. Develop distributed microservices, implement messaging with brokers (Kafka/NSQ/RabbitMQ), participate in code reviews, documentation, and create tools/libraries for the microservices ecosystem.

The Senior Full-Stack Software Engineer will design and develop scalable applications, mentor juniors, and support production systems while working with various technologies, including AWS and Docker.

Build ML prototypes and data pipelines, collaborate with researchers and product engineering to integrate models into Fusion, containerize and deploy applications, implement best practices, and document architectures to accelerate research-to-production workflows.

Build and ship frontend features for checkout and merchant dashboard using React and TypeScript, deploy to production, collaborate with Design, contribute to Python backend when useful, and participate in architecture and quality-focused engineering practices.

Build and ship full‑stack features for North, an enterprise AI workspace. Develop secure autonomous agents, execution engines, integrations, observability and evaluation systems. Collaborate with researchers to productionize models and deliver performant, low‑resource deployment code while adhering to strict security and privacy constraints.

The Software Engineer will develop backend systems using Rust, manage multimodal data, and improve data infrastructure with a focus on performance and design ownership.

Develop and maintain automated tests and test frameworks for Veeam products, collaborate with development teams, build and manage test infrastructure, analyze source code and test results, and maintain defect databases.

The role involves optimizing hardware support within a software stack for AI model deployment, collaborating with teams and hardware vendors to enhance performance and portability across platforms.

Design, develop, and maintain scalable, secure backend services using .NET and Azure. Collaborate with cross-functional teams, implement microservices and CI/CD pipelines, participate in code reviews, resolve technical challenges, and follow best practices for performance, reliability, and cloud-native architecture in a hybrid work environment.

Canonical seeks open-source enthusiasts to optimize Ubuntu for new silicon technologies, collaborating with teams and customers to enhance software quality and performance across various platforms.

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