Top Software Engineer Jobs in Lisbon

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.

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

Develop and maintain scalable microservices and APIs in an agile environment. Design integrations, ensure data integrity and security, participate in code reviews, CI/CD, testing, and collaborate with product and other engineering teams.

Develop complex cloud applications and scalable infrastructure for the Altium 365 platform. Build distributed, high-load systems and platform features involving APIs, databases, microservices, authentication, caching, messaging, search, and multi-tenancy. Perform performance profiling, optimization, load and stress testing, influence architecture across teams, and establish engineering standards, best practices, and technical governance.

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

Build and maintain integrations for North's agentic platform, own the end-to-end integration pipeline, create evals and tests to ensure reliability, tune tool descriptions, and help other engineers add and maintain integrations while using AI responsibly to improve performance and quality.

Join the team building Feedzai's Risk Engine to evaluate and score transactions in real time. Develop high-performance, low-latency backend services, participate in full SDLC, code reviews, cloud-native SaaS architecture, and on-call rotations. Collaborate with product and data science to design distributed systems and improve production reliability.

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.

Senior Software Engineer responsible for designing and delivering high-quality .NET/C# microservices, mentoring engineers, driving architecture and technical decisions, operating event-driven systems (Kafka/publish-subscribe), using SQL and NoSQL datastores (Postgres, ElasticSearch, MongoDB, Redis), ensuring documentation, monitoring/incident response, and promoting best practices and continuous improvement.

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.

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

Canonical seeks open-source enthusiasts to optimize Ubuntu for new silicon technologies, collaborating with teams and customers to enhance software quality and performance across various platforms.

Design and develop services for automating work with a large server fleet while engaging in DevOps processes.

Design and develop services for monitoring servers, improve metrics pipelines, automate maintenance workflows, and investigate incidents to ensure infrastructure reliability.

As a Lead Salesforce Software Engineer, you'll manage and mentor the Salesforce development team, oversee technical executions, maintain coding standards, and ensure compliance across Salesforce solutions, while collaborating closely with architects and product managers.

Develop and enhance MetaMask social and multi-chain experiences across Portfolio, browser extension, and mobile platforms. Collaborate across teams on complex projects, mentor engineers, and build scalable full-stack applications using React, React Native, modern JavaScript, blockchain technologies, APIs, testing, and continuous integration. Ensure cross-platform compatibility and apply web security best practices.

Lead technical strategy and architecture for customer migrations to a cloud-native card issuing platform. Design scalable, reliable distributed systems; establish engineering standards and architectural patterns; evaluate trade-offs; mitigate technical risks; align cross-team dependencies; partner with stakeholders; unblock complex initiatives; mentor senior engineers; improve testing, observability, code quality, incident response, and operational readiness; and contribute hands-on to critical systems.

Design, develop, and maintain high-quality web applications using CodeIgniter and PHP. Collaborate with cross-functional teams to define and ship features, ensure application performance and quality, identify and fix bugs, and maintain code quality and automation.

Build and ship Kotlin-based native Android features for an AI neobank: implement payment, insurance and financial flows; integrate REST APIs; improve performance, reliability, and on-device AI using TensorFlow Lite; collaborate with product and design to simplify user journeys and use analytics to iterate.

Lead backend engineering and AI-agent integration efforts: design agent-ready systems, context pipelines, CI/CD and test guardrails, migrate monoliths to microservices, set API and schema standards, mentor engineers, and drive AI-assisted development practices.

Designs and executes manual and automated tests for cloud-based and desktop software products. Builds test automation, validates backend systems and data using SQL and NoSQL databases, and partners with developers, product teams, DevOps, and QA professionals. Maintains test documentation, identifies risks, supports software reliability, and contributes to continuous improvement of QA processes and tools.

The role involves building and shipping backend services, writing well-tested code, reviewing code, and collaborating with senior engineers while embracing AI tools.

The Senior Scala Developer will design and architect systems for optimized query performance, manage aggregates, and improve reliability in large-scale environments.