Top Software Engineer Jobs in Portugal

Design and implement high-performance C++ applications for optical networking hardware. Contribute to system modernization, use STL/Boost and multithreading, write automated unit (GTest), integration and stress tests, and participate in design reviews and cross-functional collaboration.

Design, implement, and maintain telecom mediation and billing services with a focus on resiliency, scalability, security, and test coverage. Collaborate in an Agile team, identify improvements, document solutions, mentor juniors, and support full product lifecycle delivery.

Own and build production Android applications in Kotlin that integrate AI features (chat, vision, voice). Optimize performance, memory, and responsiveness for AI-heavy flows; implement analytics, logging and feedback; collaborate with backend and ML teams to design APIs and ensure app stability, security, and scalability in production.

As a Backend Software Engineer, you'll design scalable backend systems, optimize database performance, and collaborate with front-end and DevOps teams.

Contribute to Juju's development, collaborate with teams on distributed systems, debug issues, and enhance cloud automation features.

Develop modern event-driven microservices with AWS, collaborate in design sessions, and build high-performance applications using Java or Typescript.

Software Engineers at QuantCo will design and develop scalable solutions, integrate models into client businesses, and improve products based on client feedback.

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.

Back End Engineers at Thought Machine develop scalable microservices, write automated tests, manage deployments, and translate customer needs into actionable tasks. They collaborate with other engineering teams to ensure coherent feature additions.

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

Staff Software Engineer responsible for leading architectural evolution across a distributed rendering platform, contributing to core backend systems, and improving performance, reliability, scalability, testing, and delivery practices. The role includes mentoring engineers through pairing and design reviews, unblocking teams, shaping technical strategy, improving CI/CD and tooling, and aligning engineering investments with product and business goals.

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.

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.

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.

Design, build, ship, and own high-scale, user-facing product features across frontend, backend, and data systems. Define problems, scope and prioritize work, collaborate with Product, monitor production usage, debug incidents, improve reliability, review code, and mentor engineers. The role requires strong backend expertise alongside React proficiency and ownership from product discovery through long-term maintenance.

Build and ship production AI agents that help mobile app developers manage subscriptions and paywalls. Own agent orchestration, tool execution, context management, evaluation, observability, permissions, and human-in-the-loop controls. Develop reliable, secure, user-facing backend systems, scope projects independently, monitor adoption, improve features after launch, participate in architecture and incident response, and mentor engineers.

Provides principal-level technical direction across CRM engineering teams and shared platform capabilities. Responsibilities include architecting large-scale distributed and data-intensive systems, improving reliability, observability, performance, and operability, mentoring engineers, resolving critical cross-team incidents, leading migrations and integrations, designing webhook architectures, and establishing responsible AI engineering practices. The role also drives engineering standards, CI/CD, production readiness, and platform improvements across the CRM domain.

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

Own and resolve production customer issues end-to-end: debug integrations, browser JS, agents and prompts, and database issues. Communicate directly with customers, build automation and runbooks to prevent recurrence, surface recurring patterns to Product, and raise team capability through tools and documentation.

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.

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

As a Lead Salesforce Software Engineer, you'll manage and mentor the Salesforce development team, oversee technical executions, maintain coding standards, and ensure compliance across Salesforce solutions, while collaborating closely with architects and product managers.

The role involves developing backend services using Python and Django, ensuring high availability and performance, and leveraging computer vision technology for 3D experiences in home decor.