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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Design, build, and optimize Python backend services and event-driven serverless microservices on AWS. Lead infrastructure-as-code with Terraform, CI/CD with Jenkins, DynamoDB data modeling, performance tuning, observability, code reviews, and cross-team delivery of scalable, low-latency systems.

Design, build, and optimize high-throughput Python backend applications and event-driven serverless microservices on AWS. Lead infrastructure-as-code with Terraform, implement CI/CD with Jenkins, design DynamoDB data models, profile and improve performance, run observability and debugging, conduct code reviews, and drive cross-team technical improvements.

Design, build, and maintain resilient, scalable backend services for Network API, xSIM Management and Recording Platforms. Implement features, maintain code quality and tests, improve observability, participate in code reviews, and own end-to-end delivery.

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 an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

Join Hiscox London Market Engineering to design and deliver cloud-first C#/.NET solutions, write and review maintainable code and unit tests, mentor teammates, shape solution and architecture, champion security and engineering standards, adopt AI-assisted development, and collaborate with distributed squads to deliver business value.

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

The Senior Full-Stack Software Engineer will design and develop scalable applications, mentor juniors, and support production systems while working with various technologies, including AWS and Docker.

Build ML prototypes and data pipelines, collaborate with researchers and product engineering to integrate models into Fusion, containerize and deploy applications, implement best practices, and document architectures to accelerate research-to-production workflows.

Build and ship frontend features for checkout and merchant dashboard using React and TypeScript, deploy to production, collaborate with Design, contribute to Python backend when useful, and participate in architecture and quality-focused engineering practices.

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.

Develop and maintain high-performance production software in Modern C++ for optical networking systems. Work with STL, Boost, and asynchronous programming, write tests (unit, E2E, stress), participate in design reviews, and collaborate across a global team while learning domain-specific networking concepts.

Build and ship full‑stack features for North, an enterprise AI workspace. Develop secure autonomous agents, execution engines, integrations, observability and evaluation systems. Collaborate with researchers to productionize models and deliver performant, low‑resource deployment code while adhering to strict security and privacy constraints.

The Software Engineer will develop backend systems using Rust, manage multimodal data, and improve data infrastructure with a focus on performance and design ownership.