Top Software Engineer Jobs in Lisbon

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

The Staff Software QA Engineer leads quality initiatives, mentors team members, develops, and executes automated tests, and participates in Agile ceremonies to ensure product quality.

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.

Lead architecture and development of cloud-native applications: containerize and orchestrate with Docker/Kubernetes, build event-driven microservices (Python/Go/Java), model network topologies with YANG/OpenConfig, manage graph (Neo4j) and time-series data, build gRPC/REST APIs, and integrate AI/ML models into telemetry pipelines.

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.

Dragonfly is seeking Software Engineers for various portfolio companies, focusing on crypto technologies. Engineers of all experience levels are needed across multiple stacks.

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.

As a Distributed Systems Engineer, you'll design and evolve LiveKit's core systems, implement resilient architectures, and enhance reliability and developer velocity, working on critical features in production environments.

The Senior Infrastructure Engineer will manage and scale LiveKit's core infrastructure, focusing on reliability and performance, while working on Golang code and automation for distributed systems.

Design and evolve core control, data, and observability systems; implement resilient region-spanning architectures; build libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, and testing; and shape platform capabilities across identity, scheduling, observability, and distributed state management.

Design, implement, and manage LiveKit's infrastructure, focusing on performance, reliability, and automation while ensuring effective incident management and coordination with vendors.

The role involves designing and evolving core systems at LiveKit, implementing resilient architectures, and building tools to enhance system reliability and developer speed. Strong distributed systems experience and programming skills are essential.

Design, implement, and operate low-latency, highly available distributed control, data, and observability systems. Build region-spanning architectures, libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, testing, and real traffic; and shape platform capabilities around identity, scheduling, observability, and distributed state management.

As a Senior Software Engineer, you will develop and manage a MongoDB solution on various platforms, ensuring reliability and security while contributing to a small team focused on impactful projects.

The Senior Software Engineer will build integrations with external APIs, optimize code performance, and maintain testing protocols. A focus on backend development is essential.

Join a remote EU-based talent pipeline as a senior C++ engineer working on a custom engine or UE5. Maintain and develop game features and tools, collaborate across disciplines, and debug, profile, and optimize code for Windows PC strategy games.

Seeking an experienced Senior Backend Developer to build Ruby on Rails services for chatbots, research Slack & MS Teams ecosystems, and enhance existing systems.

Lead platform architecture and hands-on system design for scalable, secure microservices. Create production-ready Go implementations, run architecture reviews, drive migrations, define standards, mentor engineers, perform threat modeling, and author ADRs, runbooks, and rollout strategies to enable zero-downtime deployments at scale.

Lead design and implementation of scalable, high-performance backend services, mentor engineers, deliver features with automated testing and strong engineering practices, collaborate across teams, own solutions, and participate in 24x7 on-call rotation.

Lead design and delivery of large-scale, cloud-native backend systems. Drive architecture, standards, and operational excellence. Mentor engineers, lead interviews, solve ambiguous technical problems end-to-end, and influence product and technical strategy across teams.

Build and improve Restream’s web interfaces and user-facing features for the AI Clips team. Design UI and business logic, collaborate with product designers, participate in code reviews, improve system reliability, and evaluate emerging technologies. The role requires strong JavaScript and TypeScript expertise, advanced React knowledge, CSS preprocessor experience, and familiarity with backend development, cloud infrastructure, containers, and continuous deployment.

Lead design and ownership of shared libraries, Spring Boot starters, and agentic frameworks. Set standards for agent orchestration, evaluations, and guardrails. Mentor teams on Python-based agents (LangChain/LangGraph), drive adoption, prototype research directions, and improve developer experience across Kotlin backend and client libraries.

The Senior Software Engineer (Infrastructure) will design and build reliable systems, develop observability tools, automate deployment processes, and enhance code quality, while collaborating closely with other engineers.

Seeking a Senior/Principal Software Engineer to lead technical design for SingleStore's cloud platform, solve complex system problems, and mentor other engineers. Requires extensive experience in system-level software development and familiarity with distributed systems.