Top Software Engineer Jobs in Lisbon

Work full-time for 12–14 weeks with an engineering team to ship code that runs at Internet scale. Deliver an autonomous project, collaborate cross-functionally, work with a mentor, present results company-wide, and participate in professional development and community activities.

Develop and maintain automated tests for Veeam products, enhance testing frameworks, design and implement tests, analyze source code and test results, manage testing infrastructure, support automated testing systems, and maintain defect databases. Collaborate with international software development and QA teams while contributing high-quality C# code across Windows and Linux environments.

Develop and maintain tax compliance software across the full software development lifecycle. Write clean, tested code using Node.js, JavaScript, React, databases, TDD, and CI practices. Collaborate with product, design, QA, and technical teams to refine requirements and deliver customer solutions. Work with senior developers to solve complex problems, improve engineering standards, and document solutions while using AI-assisted tools to enhance coding, testing, and problem-solving.

The Senior Software Engineer will enhance the REDAPL platform by building a query engine, leading projects, and driving architectural decisions while collaborating with product teams.

Build and maintain scalable, backend-heavy web services and full-stack features for a youth-focused digital platform. Responsibilities include technical design, implementation, testing, deployment, monitoring, documentation, architecture reviews, production support, on-call participation, and infrastructure automation. The role emphasizes performance, reliability, security, DevOps practices, and collaboration with product and design teams.

Design, build, and operate security integrations and detections (WAF, RASP, API security, IAST, SCA) across Datadog tracing libraries (.NET/Java focus). Take features from prototype to production, monitor telemetry, debug cross-system issues, shape roadmap, collaborate with product and platform teams, and mentor peers to improve code quality and adoption.

Build full-stack software that turns satellite intelligence into mission-critical decisions. Architect and implement deterministic multi-agent orchestration, geospatial RAG with distributed vector consistency for DDIL environments, optimize high-concurrency spatial indexing and queries, and integrate AI/LLM workflows across cloud and edge. Collaborate cross-functionally, ship production systems, and prepare for forward-deployed, customer-facing engineering roles.

Lead backend engineer delivering high-quality .NET C# microservices. Drive architecture, SRE standards, mentoring, cross-team technical decisions, debug complex issues, and improve best practices.

You will solve complex problems related to cross-border logistics and B2B systems, focusing on high-load architecture and AI-driven tools.

The Software Engineer will design, develop, and maintain backend services and APIs, collaborating across teams to enhance user experiences and ensure scalability and performance.

Build and maintain Ergodic AI’s AI platform across back-end and front-end systems. The role involves developing with Python web frameworks and JavaScript/TypeScript, integrating with client technology stacks and workflows, applying AI, ML, and LLM concepts, and contributing to DevOps, cloud deployment, testing, and infrastructure practices. As an early-stage hire, the engineer will help shape the product and solve complex data and AI challenges.

Build scalable software systems, internal platforms, tools, APIs, services, and infrastructure using Go and TypeScript. Solve complex architectural problems, support AI-native and agentic systems, work with Azure and AWS, adopt AI-powered development tools, and improve engineering reliability, performance, architecture, and developer experience. Collaborate with distributed technical teams in a fully remote environment.

As a Senior Backend Engineer at Mapped, you'll develop ETL pipelines, GraphQL and gRPC APIs, and scalable systems for a data platform.

Design, develop, and maintain full‑stack cloud software using .NET, Angular and relational databases. Own the full SDLC, troubleshoot and optimize performance, perform code reviews, produce technical documentation, and collaborate with product, design, and engineering teams to deliver scalable, high‑quality features.

Responsible for developing and maintaining backend services with a focus on REST APIs, collaborating with a team, and ensuring code quality.

Design, operate, and optimize a large-scale distributed architecture and microservices. Troubleshoot production issues and improve API gateways, ensuring system reliability and performance. Engage in CI/CD improvements and contribute to service decoupling.

Build and own core systems powering Reach’s AI agents, including architecture, data pipelines, agent orchestration, and AI-powered product features. Work across React and TypeScript frontend, Python backend, cloud infrastructure, and relational or in-memory datastores. Ship features end-to-end, collaborate directly with users, move quickly in an early-stage environment, and help define the company’s technical direction.

Join Dashlane as a Backend Software Engineer, focusing on feature development and improving customer experiences in a collaborative team environment using NodeJS and Typescript.

The Senior iOS Engineer will lead engineering decisions, ship production code for the iOS app, maintain app architecture, and contribute to product discussions in a fast-paced, remote work environment.

Build and architect high-performance advisory brokerage services for block trading, portfolio management, and IRA products. Develop frontend and backend systems, databases, and distributed architectures with strong concurrency, scalability, availability, and low-latency performance. Design order management and financial transaction systems while contributing across the technology stack in an early-stage environment.

Build and ship backend services for Primer’s payment orchestration platform, handling routing, fallback logic, tokenization, authentication, and workflows at scale. Deliver features from specification through production, participate in architecture and code reviews, monitor system health, troubleshoot production issues, and collaborate on reliable, maintainable engineering solutions in a remote-first team.

Build and ship full-stack features for a data intelligence SaaS platform, spanning backend services and frontend interfaces. Use AI coding assistants to accelerate development while applying sound engineering judgment. Participate in architecture discussions, code reviews, testing, incident response, troubleshooting, documentation, and knowledge sharing. Partner with product managers to translate requirements into technical solutions. The role emphasizes SaaS architecture, AWS cloud fundamentals, Docker, Kubernetes, CI/CD, agile delivery, autonomy, and production ownership.

Build and maintain a production-grade iOS application using Swift and SwiftUI, integrating AI features through backend APIs. Design reliable AI interaction patterns, optimize performance, memory, battery, and latency, and support streaming, retries, and fallbacks. Collaborate with backend and ML engineers on API and system behavior, capture user feedback for AI evaluation, maintain App Store quality, and monitor and resolve production issues.

Design, build, and optimize backend services for data gathering, processing, and delivery. Define and maintain service contracts, ensure high test coverage, observability, and documentation. Make architectural decisions for distributed systems, collaborate with product teams, and maintain/ improve an existing Kotlin/Java codebase.

Lead backend development of Diabolocom's Voice Squad, building and optimizing core telephony services (call routing, media handling). Design and implement distributed systems, refactor for scalability and faster delivery, work across Java/Kotlin/Go, Spring Boot, PostgreSQL, RabbitMQ, Redis, Docker. Mentor teammates, own architectural decisions, improve existing codebase, and drive high-performance, reliable voice platform.