Top Software Engineer Jobs in Portugal

Design, develop, and maintain scalable cloud-based software using C#/.NET and Azure. Build APIs, backend services, database integrations, and messaging solutions while contributing to cloud migration, architecture, testing, automation, DevOps, and continuous delivery. Analyze requirements, shape technical solutions, collaborate with architects and product stakeholders, and mentor junior engineers within an Agile team.

Leads architectural and code-level performance engineering for Elasticsearch, owning optimization initiatives from design through production. Develops performance models, profiles distributed systems, identifies bottlenecks, builds benchmarks and regression detection, and drives automation through AI-assisted optimization harnesses. Collaborates across teams, mentors engineers, and improves scalability and predictability across stateful and serverless architectures.

Architect and build production AI-powered HR systems using agentic workflows, multi-agent systems, APIs, and workflow automation. Integrate Workday and other HR tools, implement governance, audit logging, privacy controls, and human approval gates, and ensure reliable payroll-adjacent workflows. Document solutions, train People team users, drive adoption, and measure automation impact. The role requires strong software engineering, AI application development, HR technology, Workday, data privacy, and workflow automation experience.

Own the architecture of GoCardless’s dashboard platform and company-wide design system. Provide technical leadership across multiple teams, de-risk high-impact initiatives, make cross-team architectural decisions, mentor engineers, and remain hands-on with complex technical problems. The role requires strong full-stack capability, deep frontend architecture expertise, backend experience, executive communication, systems thinking, and pragmatic decision-making.

Leads architecture and hands-on development for scalable, secure cloud products. Translates product requirements into technical design documents, evaluates trade-offs, estimates work, and guides Scrum teams in breaking designs into actionable stories. Develops production code using Java and Kotlin, contributes across Angular-based applications, mentors engineers through reviews and pairing, and establishes engineering best practices. The role also involves designing AWS microservices and working with relational and NoSQL databases.

Designs and executes manual and automated tests for software applications, including functional, regression, integration, and user acceptance testing. Develops automation scripts, analyzes defects, tracks test coverage and quality metrics, maintains test documentation and environments, and collaborates with developers and product managers to resolve quality issues. The role also requires staying current with testing tools, methodologies, and QA best practices.

Designs and executes manual and automated software tests across functional, regression, integration, and user acceptance scenarios. Develops automation scripts, documents defects, tracks test coverage and quality metrics, maintains test data and environments, and collaborates with developers and product managers to resolve quality issues. Requires software QA experience, programming knowledge, automation framework expertise, API testing skills, version control proficiency, and strong communication abilities.

Lead the design, architecture, and development of native Windows desktop applications. Ensure best practices in coding, accessibility, and user experience. Oversee full lifecycle of features, from conception to maintenance, and collaborate with cross-functional teams to shape products.

The Senior Software Engineer will build and maintain foundational services and SDKs, optimize functionality, and enhance user experience through collaboration with product teams.

The Senior Software Engineer will build and optimize core services and SDKs, collaborating with product teams to enhance user experience and system efficiency using Kotlin and cloud technologies.

Lead design and implementation of cloud-native, containerized microservices and APIs. Build event-driven backends, graph and time-series data pipelines, and integrate AI/ML models for predictive network analytics. Manage deployment with Docker/Kubernetes, event streaming, and CI/CD best practices.

Senior software engineer responsible for designing, developing, and maintaining business-critical applications. Collaborate with product, QA, DevOps, and stakeholders to translate requirements, implement scalable Java/Python solutions on AWS, address technical debt, improve performance, participate in code reviews, support releases, and ensure application stability and continuous improvement.

Build core components of a diagnostic and personalization platform: backend data pipelines, frontends, services for genomic data ingestion, ML model integration, APIs, and cloud infrastructure. Collaborate with product and ML teams, iterate on prototypes and MVPs, and make architectural decisions supporting scalability and reliability.

Design and build the on-prem software stack for ModelVault appliances: containerized inference engines, model integration (LLMs/vision), deployment tooling, CLIs/GUI/APIs, OS and GPU setup, remote updates, telemetry, and collaborate with customers and founding team to iterate and scale the engineering org.

Design, build, and maintain web-based game frontends and backend services. Lead technical direction, enforce code quality, mentor engineers, implement IaC and CI/CD, and ensure production reliability and observability.

The Senior Software Engineer will ensure product installations meet client requirements, develop custom interfaces, and support integrations using various technologies while mentoring peers.

Build and modernize cloud-first, data-focused backend microservices using Java and Spring Boot. Design scalable APIs, optimize SQL and stored procedures, integrate with cloud and legacy systems, deploy to Kubernetes with Helm, collaborate with data teams, and ensure testing, CI/CD, and production reliability.

Senior full-stack product engineer owning features end-to-end: research customer problems, write product specs and wireframes, design and implement frontend and backend solutions, collaborate with product, design and infra, and ship high-quality, scalable features for tens of thousands of users.

Senior full‑stack product engineer owning large product areas end-to-end: research, specs, wireframes, implementation, and shipping reliable features. Collaborate with product, design, and infra; balance speed and quality; solve ambiguous customer problems and build scalable abstractions.

Build and ship browser-based 3D interactive features using React, Three.js, and WebGL; integrate frontend with a C++ computational backend on AWS; use AI tools (Claude Code) to accelerate development; prototype AI-powered product features; and collaborate with clinical scientists, UX, ML engineers, and QA.

Build foundational agent infrastructure for an AI assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable, and secure backend systems, launch agentic features, own core infrastructure, participate in on-call, and mentor others.

Design, build, ship, and maintain end-to-end product features across frontend, backend, and data layers. Own projects from definition through production, improve reliability and scalability, collaborate with product and design, mentor engineers, and engage with customers to solve real user problems.

Lead optimization of concurrent systems, scale backend microservices, and collaborate with developers and engineers on deployment for retail solutions.

Lead the delivery of scalable software solutions to improve patient outcomes in primary care. Collaborate across teams to define requirements and drive impactful changes.

Build and maintain developer-facing integrations for Elastic's AI platform: MCP server, agent skills, CLI, and third-party integrations. Develop in Go (and Rust), design tooling, ensure correctness through evals, collaborate with product and partners, and improve developer experience across ecosystems.