Top Software Engineer Jobs in Lisbon

Lead development of Elasticsearch vector search capabilities, including new features, algorithms, data structures, performance improvements, and bug fixes. Collaborate with globally distributed engineers and open-source contributors, provide technical leadership, and guide initiatives from design through delivery. The role requires deep expertise in vector similarity search, modern Java, data storage technologies, concurrency, and scalable search platforms.

Lead Elasticsearch search relevance initiatives focused on vector search, designing and implementing scalable search features, algorithms, and data structures. Build and improve Elasticsearch and Lucene functionality, resolve complex bugs, optimize performance, and collaborate with distributed engineering and open-source communities. Write modern Java, guide projects autonomously from design through delivery, and contribute to technical direction across teams.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.