Top Software Engineer Jobs in Lisbon

Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, design and run experiments (A/B tests and AI evaluations), implement AI infrastructure for reliable LLM inference, and iterate quickly to scale production-ready LLM-powered products.

Design, develop, and maintain full-stack SaaS software using .NET/C#/ASP.NET and Angular; build high-performance database solutions (SQL Server, PostgreSQL); participate across the SDLC including coding, testing, deployment, monitoring, troubleshooting, code reviews, documentation, and cross-team collaboration in a hybrid Lisbon role.

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.

Design, implement, and operate scalable event-driven backend services on AWS (primarily serverless). Build APIs, model relational and NoSQL databases, own IaC and CI/CD pipelines, instrument observability, and collaborate in Scrum. Advocate for code quality, testing, and AI-assisted development tooling.

Design and implement scalable event-driven backend services on AWS using Lambda and serverless patterns. Own infrastructure as code, build secure REST/GraphQL APIs, optimize CI/CD pipelines, model relational and NoSQL databases, and instrument systems for observability. Contribute in Scrum, drive architecture decisions, and promote AI-assisted development tooling.

Define clear, testable specifications for AI coding agents; run end-to-end agent workflows; build, review, and ship production-quality React components; debug root causes; ensure architectural consistency, accessibility, performance, and reliable backend integration; collaborate with product and engineering.

Design and build scalable frontend features and shared UI libraries with React and TypeScript. Lead cross-team frontend initiatives and architecture, evolve a module-federation micro frontend platform, maintain monorepo structure and tooling (Nx/Turborepo), and own CI/CD pipelines in GitHub Actions. Use AI-assisted and agentic AI tools as a core part of the engineering workflow.

Design and build cloud-native, event-driven backend services in Java. Develop distributed microservices, implement messaging with brokers (Kafka/NSQ/RabbitMQ), participate in code reviews, documentation, and create tools/libraries for the microservices ecosystem.

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.

Develop and maintain automated tests and test frameworks for Veeam products, collaborate with development teams, build and manage test infrastructure, analyze source code and test results, and maintain defect databases.

Lead technical delivery of e-commerce payment authentication products (ID Check, Token Authentication Service/Framework). Provide architecture and people leadership, drive design and implementation of secure, scalable cloud-native microservices, mentor engineers, enforce QA and security standards, manage cross-functional relationships, and improve processes and metrics.

Develop, test, and maintain Mimo/Mobilix applications; collaborate on requirements and architecture; implement integrations and APIs; follow DevOps/CI/CD, version control, security, and documentation best practices; support continuous improvement and system stability.

Design, develop, test, and deploy features in .NET Core/.NET Framework. Migrate from .NET Framework to .NET Core, optimize SQL queries and distributed cache performance, implement observability (OpenTelemetry, OpenSearch, Prometheus), create/consume NuGet packages, perform code reviews and automated testing, and provide third-line production support.

Develop, review, and refactor clean, scalable C#/.NET code in a SaaS environment. Mentor junior engineers, implement unit tests, monitoring/alerting, and produce technical documentation while collaborating on product quality, security, and performance improvements.

Maintain and evolve the FileNet application: perform functional and technical analysis, develop and implement solutions, design and execute test cases, validate functionality, and monitor testing cycles to ensure quality and performance.

Build, deploy and maintain production infrastructure tooling and automation to support scalable, highly available services; develop observability, orchestration, backup/disaster recovery systems; improve deployment CI/CD and integrations with cloud and third-party infrastructure for customer and internal SRE teams.

The Software Engineer will support data collection for model training, manage ingestion pipelines on GCP, and collaborate with data scientists to enhance dataset quality and scale.

The Senior Software Engineer will collaborate to design and implement scalable applications, focusing on backend development with Java and Spring Boot while ensuring high-quality code and a strong user experience.

Software Engineers at SingleStore work on real-time technology, responsible for new and existing projects, collaborating across teams, and contributing to the product lifecycle.

Lead organization-wide software and AI engineering strategy, design scalable cloud-native systems, drive deployment and data integration best practices, and deliver rapid prototype-to-production solutions. Own LLM and ML strategy including model fine-tuning, RAG, AI evaluation, and observability. Mentor technical leaders, shape developer experience and knowledge management, and represent engineering at executive and industry levels.

Build and own the iOS client: implement AI-centered features with Swift and SwiftUI, integrate backend APIs and on-device ML, optimize performance and battery, design resilient AI UX patterns, capture user signals, and maintain App Store quality and production reliability.

Own and build production Android applications in Kotlin that integrate AI features (chat, vision, voice). Optimize performance, memory, and responsiveness for AI-heavy flows; implement analytics, logging and feedback; collaborate with backend and ML teams to design APIs and ensure app stability, security, and scalability in production.

Own end-to-end feature delivery in an AI-first engineering team: direct and validate AI across the build loop, set quality standards for AI-generated code, develop prompts and agent workflows, mentor junior engineers, and collaborate with PM, design, DevOps and QA to ship production software.

Lead design and development of low-level Linux instrumentation and runtime security technologies (eBPF) to detect threats and protect cloud-native workloads. Build reusable monitoring for process, file, and network visibility, drive end-to-end feature delivery, establish testing methodologies for reliability and performance, partner cross-functionally, and provide technical leadership and mentoring.

As a Backend Engineer, you will design, deliver, and own backend features for the merchant platform, focusing on reliability and performance while collaborating with your team.