Top Software Engineer Jobs in Portugal

Lead Elasticsearch search relevance initiatives by designing and implementing search features, algorithms, and data structures; improving vector search speed and relevance; fixing complex bugs; contributing to Lucene; collaborating with globally distributed engineers and open-source contributors; and writing modern Java. The role requires autonomy, technical leadership, code review participation, and expertise with search or vector databases and storage technologies.

Lead technical direction and hands-on execution for major products and systems. Design scalable, reliable architectures across backend, frontend, APIs, databases, and infrastructure; write code; make architecture trade-offs; solve production issues; improve testing, security, observability, and development practices; lead critical initiatives; and mentor engineers across teams.

Leads technical direction and hands-on execution for major software products and systems. Designs scalable backend, frontend, API, database, and cloud solutions; writes code; makes architecture trade-offs; resolves production issues; improves testing, security, reliability, and observability; and mentors engineers across teams. The role is fully remote, globally distributed, and requires strong English communication.

Build end-to-end AI-first features for a benefits platform, working across frontend (React/TypeScript) and backend (Python/FastAPI/SQLAlchemy). Ship production code, integrate ML components (LLMs, recommenders, RL), maintain CI/CD and cloud deployments (GCP preferred), collaborate with product/design, write tests and documentation, and participate in peer review and iterative development.

Build and own release-defining projects for SingleStore’s multi-cloud managed database service. Develop scalable distributed systems across control and data planes, cloud infrastructure, networking, storage, Kubernetes, and customer-facing platforms. Lead initiatives from design through production, improve engineering standards, testing, observability, and CI/CD, solve reliability challenges, mentor engineers, communicate technical trade-offs, and collaborate cross-functionally to deliver high-quality products and customer outcomes.

Build and enhance GraphAware Hume, a graph-powered analytics platform. Responsibilities include developing APIs, designing secure and scalable access-control systems, orchestrating workflows for graph analytics and real-time insights, optimizing application performance, contributing to architecture and technical design, and collaborating with distributed engineering teams.

The Backend Engineer will develop and maintain features for Restream web services, design backend APIs, ensure infrastructure resilience, and contribute to a collaborative team environment.

Design, implement, unit-test and document embedded software components for public address and voice alarm systems. Integrate and commit code, debug builds and defects, create reusable software components, consult on OSS usage, and keep up with technical developments while producing Clean Code and collaborating within the team.

Develop and optimize Soroban smart contracts and integrate anchor services on the Stellar network for cross-border payment solutions. Collaborate with cross-functional teams, test and debug smart contracts, document development processes, provide technical support, and stay current with blockchain and payments technology trends to ensure secure and efficient implementations.

Implement and optimize EVM-compatible features, reduce gas usage, develop and test smart contracts, collaborate on Ethereum infrastructure, and provide technical support.

Build and maintain high-security mobile wallet apps using React Native, Swift, or Kotlin. Implement biometric authentication and secure key storage, collaborate with cross-functional teams, debug performance issues, and propose UX and security improvements.

Develop and maintain scalable front-end applications using AngularJS, integrate RESTful APIs, and collaborate with cross-functional teams while ensuring performance optimization and usability.

As a Backend Software Engineer, you will develop scalable solutions, manage the SDLC, conduct testing, troubleshoot bugs, and collaborate with team members to align technology with business goals.

Lead the architecture, development, and delivery of scalable backend systems, APIs, data pipelines, and services supporting global 3D and computer vision applications. Drive technical direction, system performance, resiliency, observability, and maintainability. Mentor senior engineers, conduct architecture reviews, lead cross-functional initiatives, influence hiring and team growth, and shape engineering culture and long-term technical vision.

The Senior Software Engineer will design and develop high-quality web and mobile applications, ensuring code quality while collaborating with product teams and mentoring junior engineers.

Senior Software Engineer responsible for designing and delivering high-quality .NET/C# microservices, mentoring engineers, driving architecture and technical decisions, operating event-driven systems (Kafka/publish-subscribe), using SQL and NoSQL datastores (Postgres, ElasticSearch, MongoDB, Redis), ensuring documentation, monitoring/incident response, and promoting best practices and continuous improvement.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Join the Kubernetes product team to design and implement Kubernetes operators and addons, write high-quality Golang and Python code, debug issues, collaborate with a distributed team, mentor colleagues, and contribute to open-source integration and lifecycle management. Travel 2–4 weeks yearly for team events.

As a Junior Software Developer, you will develop innovative solutions for clients using OOP, web development, and database skills, working in a team environment.

Develop and maintain high-performance backend services for Network APIs, xSIM management, and recording platforms. Design scalable, resilient architectures, implement new features, write tests and benchmarks, enable observability, participate in code reviews, and own end-to-end delivery while collaborating across teams.

Build and maintain services and tooling to automate and secure network lifecycle across data centers. Implement CI/CD, staged rollouts, drift detection, observability pipelines, and APIs that integrate network source-of-truth with the cloud platform. Collaborate with network engineers and SREs to turn operational pain into production-grade automation and tooling.

Work on Percona's open-source MongoDB operational tools (primarily ClusterSync and also Backup). Build and harden a Go-based replication engine handling initial cloning and continuous change streams, ensure correctness and fault tolerance at scale, support sharded clusters, optimize performance and resource usage, and maintain CLI/HTTP APIs, metrics, logging, tests, and packaging. Collaborate openly via GitHub pull requests and JIRA.

Develop core backend components for a blockchain network, focusing on networking, reliability, scalability, and high-quality software practices.

Develop and enhance front-end, server-side, and database applications, focusing on blockchain products while ensuring high performance and security.

The role involves developing enhancements within D365FO, managing environments, providing 3rd Level support, and collaborating with teams on solutions.