Top Software Engineer Jobs in Portugal

Build and maintain scalable full-stack credit card and payment products using .NET, C#, React, JavaScript, and database technologies. Own the software development lifecycle from coding through production monitoring and continuous improvement. Collaborate with product managers, QA, and engineers; create unit and integration tests; troubleshoot issues; and translate technical solutions into business outcomes.

Own and deliver substantial connectivity features across drivers, protocols, client libraries, connectors, and distributed services. Design scalable systems, diagnose complex client/server and production failures, maintain compatibility and reliability, and build comprehensive testing and observability. Collaborate across Product, QA, Support, SRE, and partner teams; mentor engineers; influence technical direction; and contribute to open-source projects. The role requires deep systems programming expertise and experience with APIs, networking, concurrency, asynchronous programming, and production software delivery.

Develop and maintain C# applications and services with complex algorithmic and mathematical functionality. Responsibilities include improving algorithms, designing and refining features, code reviews, testing, deployment, documentation, technical decision-making, customer collaboration, and mentoring junior engineers. The role requires strong software engineering, analytical, problem-solving, communication, and ownership skills, with knowledge of version control, continuous integration, and testing practices.

Build front-end experiences and backend services for integrating prediction markets into MetaMask. Develop scalable APIs, real-time data feeds, transaction signing, and secure on-chain protocol integrations. Optimize performance, security, and high-volume transaction throughput across mobile, web, and browser clients while collaborating within an agile, distributed engineering team.

Build and operate backend pricing systems for real energy contracts. Responsibilities include designing the Pricing API, consolidating pricing logic, improving quote speed, implementing error handling and observability, creating alerting, explaining pricing failures, and supporting live incidents. The role requires production Python backend experience, FastAPI, SQL, data-heavy systems, end-to-end project ownership, and AI-assisted development workflows.

Design, build, and operate Cloudflare application security systems, including rate limiting and web application firewall services. Lead complex technical projects, define scalable architectures, improve reliability, review code and designs, collaborate across engineering teams, and mentor other engineers. The role involves distributed systems, production monitoring, debugging, operational improvements, and occasional on-call support.

Develop and operate complex, cloud-native applications for the Altium 365 Platform. Responsibilities include building scalable infrastructure, distributed and high-load systems, APIs, data models, services, and platform frameworks. The role involves performance optimization, testing, architectural decision-making, technical governance, and influencing engineering standards across multiple teams. Engineers may also work with AI/ML-powered search, authentication, access management, databases, caching, and message brokers.

Develop and enhance MetaMask social and multi-chain experiences across Portfolio, browser extension, and mobile platforms. Collaborate across teams on complex projects, mentor engineers, and build scalable full-stack applications using React, React Native, modern JavaScript, blockchain technologies, APIs, testing, and continuous integration. Ensure cross-platform compatibility and apply web security best practices.

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

Designs and develops backend services for Elastic’s Streams data pipeline, Logstash, and OpenTelemetry Collector using Java, JRuby, and Golang. Solves distributed-systems problems at scale, improves existing code, maintains automated test coverage, reviews pull requests, collaborates across teams, supports customers, and participates in on-call rotation. The role also involves open-source contributions and operating reliable streaming infrastructure in a globally distributed, remote-first environment.

Build and evolve Rerun’s open-source viewer, cross-language SDKs, and integrations with Rerun Hub. Develop high-performance interfaces for large-scale multimodal data, optimize workflows across desktop and web, make full-stack architecture decisions, and collaborate with backend, Hub, design, customers, and the open-source community. The role involves UI development, rendering, data handling, infrastructure, real-time applications, visualization, and performance optimization.

Develop and optimize software solutions for industrial additive manufacturing in an agile team. Responsibilities include designing algorithms, data structures, and software subsystems; debugging complex issues; benchmarking and improving performance, stability, efficiency, and scalability; and contributing to software quality and documentation. The role uses Vue.js, TypeScript, Python, C++, MongoDB, Docker, and automated development tools.

Design and develop scalable backend services and APIs for creating, configuring, testing, deploying, monitoring, and managing AI agents. Build orchestration, workflow execution, integrations, runtime, permissions, observability, and lifecycle capabilities. Collaborate with frontend, AI/ML, product, UX, DevOps, and platform teams to deliver secure, reliable, high-performance AI products and resolve complex production issues.

Designs and maintains scalable, event-driven backend services and distributed systems using TypeScript, Node.js, and AWS. Responsibilities include architecting cloud infrastructure, managing CI/CD pipelines with Jenkins and GitHub Actions, applying Infrastructure as Code, participating in Scrum ceremonies, and integrating generative AI tools into software development workflows. The role requires strong system-level thinking, cloud-native engineering expertise, and effective collaboration with technical and product stakeholders.

Design, build, and maintain scalable cloud-native backend services and distributed systems using TypeScript, Node.js, and AWS. Architect event-driven APIs and infrastructure, optimize CI/CD pipelines with Jenkins and GitHub Actions, and contribute to Scrum delivery. Drive architectural decisions, ensure high test coverage, and integrate generative AI tools such as GitHub Copilot and Amazon Q into engineering workflows. Collaborate with technical and product stakeholders to deliver resilient, high-performance systems.

Build, extend, and operate systems that provision, monitor, and orchestrate private network interconnects at scale. Design, implement, test, and deploy software; collaborate with Product, Network, and Infrastructure teams; participate in on-call rotations and maintain production health. Work with systems-level languages and network technologies (BGP, routing, overlays) across distributed services.

Lead software development initiatives within Natixis’s BPCE-SI department, collaborating with business users and IT teams. Analyze requirements, design and implement technical solutions, develop system architecture modules involving migration and security, and maintain code and data quality. The role requires strong programming skills, analytical and communication abilities, cross-functional collaboration, Agile knowledge, fluency in French, and B2-level English.

Lead adoption of Sovos’s Core and AI Platform capabilities across engineering teams. Embed with teams to understand codebases, remove adoption blockers, contribute code using AI-assisted development, and create reusable guidance and automation. Establish standards for AI coding assistants, prompt engineering, code quality, and workflow integration. Collaborate on testing and deployments while addressing security and architectural considerations. Mentor engineers, document best practices, and communicate effectively with technical and non-technical stakeholders.

Develop complex backend features for a cloud-native enterprise MDM platform. Responsibilities include designing scalable distributed systems, presenting solutions to architects, leading feature delivery, mentoring engineers, collaborating with QA and cross-functional teams, writing unit and integration tests, documenting features, making technical decisions, and supporting owned platform areas. The role requires strong Java, algorithms, data structures, software design, performance optimization, profiling, and Java runtime expertise.

Develop and maintain Python-based automated tests for functional and software security validation. Integrate testing into CI/CD pipelines and support authentication, authorization, API security, vulnerability, and robustness testing. Collaborate with engineering and security teams on secure-by-design development, DevSecOps, security automation, and AI-assisted testing for optical networking solutions.

Design, develop, and maintain scalable Go microservices, APIs, and data models supporting Cloudflare’s global IP addressing infrastructure. Build distributed, fault-tolerant systems for IP assignment, traffic engineering, BGP management, and provisioning. Collaborate with reliability, network, and product engineers while debugging complex systems and learning edge networking, routers, DNS, and Linux environments.

Build, deploy, and operate highly scalable Network Services systems on Cloudflare’s global edge network. Develop distributed networking systems involving BGP, Linux kernel dataplanes, control planes, APIs, traffic analytics, and data pipelines. Improve system performance, reliability, and scalability while solving complex customer problems. Own solutions end to end across design, development, deployment, and operations, and collaborate across engineering and product teams.

Build scalable application networking features for Elastic Cloud, focusing on ingress, security controls, private connectivity, and DNS. Implement and refactor Go-based networking components, run load and performance testing, instrument monitoring, diagnose network incidents, and collaborate across teams to meet application networking needs while leveraging AI tools to improve productivity.

Lead a hands-on frontend engineering team building partner acquisition and onboarding products. Architect scalable frontend and backend systems, oversee React and TypeScript development, integrate Kotlin, AWS, and Salesforce workflows, and establish experimentation infrastructure with Growthbook. Drive A/B testing, AI-assisted engineering practices, modern SDLC standards, code reviews, system design, and team performance across six engineers.

Design, build, and operate billing microservices for metering, subscriptions, invoicing, payments, and financial workflows. Lead projects end-to-end, ensure financial correctness and reliability, improve observability, investigate incidents, and collaborate with Product, Finance, and other teams to deliver scalable billing infrastructure.