Top Software Engineer Jobs in Lisbon

Leads architectural and code-level performance engineering for Elasticsearch, owning optimization initiatives from design through production. Develops performance models, profiles distributed systems, identifies bottlenecks, builds benchmarks and regression detection, and drives automation through AI-assisted optimization harnesses. Collaborates across teams, mentors engineers, and improves scalability and predictability across stateful and serverless architectures.

Architect and build production AI-powered HR systems using agentic workflows, multi-agent systems, APIs, and workflow automation. Integrate Workday and other HR tools, implement governance, audit logging, privacy controls, and human approval gates, and ensure reliable payroll-adjacent workflows. Document solutions, train People team users, drive adoption, and measure automation impact. The role requires strong software engineering, AI application development, HR technology, Workday, data privacy, and workflow automation experience.

Senior software engineer responsible for designing, developing, and maintaining business-critical applications. Collaborate with product, QA, DevOps, and stakeholders to translate requirements, implement scalable Java/Python solutions on AWS, address technical debt, improve performance, participate in code reviews, support releases, and ensure application stability and continuous improvement.

Drive application security and regulatory compliance through vulnerability management, CI/CD and Azure-based practices, security scanning, compliance testing (DR, pen tests), and developer best-practice governance. Report on product compliance, lead technical change (GenAI, FinOps), and support remediation and patching efforts.

Design and develop automated tests (interface, load, integrated, mobile); prioritize and automate critical business scenarios; build thorough test scenarios focused on product quality within an automation testing team.

Design and develop automated tests (interface, load, integration, mobile) within an automation team. Automate critical business scenarios, build quality-focused test cases, and maintain frameworks and tools to ensure product reliability.

Build core components of a diagnostic and personalization platform: backend data pipelines, frontends, services for genomic data ingestion, ML model integration, APIs, and cloud infrastructure. Collaborate with product and ML teams, iterate on prototypes and MVPs, and make architectural decisions supporting scalability and reliability.

Design and build the on-prem software stack for ModelVault appliances: containerized inference engines, model integration (LLMs/vision), deployment tooling, CLIs/GUI/APIs, OS and GPU setup, remote updates, telemetry, and collaborate with customers and founding team to iterate and scale the engineering org.

The Senior Software Engineer will develop advanced digital identity verification solutions, focusing on backend architecture, AI/ML systems, and platform strategy while mentoring junior engineers and collaborating across teams.

Design, build, and maintain web-based game frontends and backend services. Lead technical direction, enforce code quality, mentor engineers, implement IaC and CI/CD, and ensure production reliability and observability.

The Senior Software Engineer will ensure product installations meet client requirements, develop custom interfaces, and support integrations using various technologies while mentoring peers.

Build and modernize cloud-first, data-focused backend microservices using Java and Spring Boot. Design scalable APIs, optimize SQL and stored procedures, integrate with cloud and legacy systems, deploy to Kubernetes with Helm, collaborate with data teams, and ensure testing, CI/CD, and production reliability.

Senior full-stack product engineer owning features end-to-end: research customer problems, write product specs and wireframes, design and implement frontend and backend solutions, collaborate with product, design and infra, and ship high-quality, scalable features for tens of thousands of users.

Senior full‑stack product engineer owning large product areas end-to-end: research, specs, wireframes, implementation, and shipping reliable features. Collaborate with product, design, and infra; balance speed and quality; solve ambiguous customer problems and build scalable abstractions.

Build and ship browser-based 3D interactive features using React, Three.js, and WebGL; integrate frontend with a C++ computational backend on AWS; use AI tools (Claude Code) to accelerate development; prototype AI-powered product features; and collaborate with clinical scientists, UX, ML engineers, and QA.

Build foundational agent infrastructure for an AI assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable, and secure backend systems, launch agentic features, own core infrastructure, participate in on-call, and mentor others.

Design, build, ship, and maintain end-to-end product features across frontend, backend, and data layers. Own projects from definition through production, improve reliability and scalability, collaborate with product and design, mentor engineers, and engage with customers to solve real user problems.

Build and maintain developer-facing integrations for Elastic's AI platform: MCP server, agent skills, CLI, and third-party integrations. Develop in Go (and Rust), design tooling, ensure correctness through evals, collaborate with product and partners, and improve developer experience across ecosystems.

Build and scale EverAI's Ruby on Rails platform: collaborate with product, plan integrations, estimate work, implement features, perform code reviews, testing, and run experiments to improve user experience at scale.

Improve reliability, observability, and scalability of Enode's connectivity layer. Build and maintain API integrations with OEMs and energy partners, reduce incidents, enhance monitoring and alerting, drive complex projects to release, uphold code quality and testing, collaborate with product, and mentor teammates while applying AI tooling strategically.

Design, implement, and optimize Elasticsearch core storage and query engine for logs and metrics. Lead architectural improvements, resolve performance bottlenecks, mentor engineers, drive cross-organizational initiatives, triage community issues, and write idiomatic modern Java for high-performance distributed systems.

Design, implement, test, deploy, and maintain cloud-native full‑stack applications. Collaborate cross-functionally, follow software engineering best practices, use event-driven patterns, leverage AWS, participate in code reviews, troubleshoot issues, and improve CI/CD workflows.

Lead design and development of scalable, user-friendly iOS applications for clinical and customer use. Define technical architecture, implement and optimize features, build modular frameworks, ensure high quality via automated tests, apply Apple design and accessibility standards, and collaborate with cross-functional teams in agile processes.

As a Senior Full Stack Developer, you'll build and enhance enterprise applications, mentor junior developers, and collaborate on system improvements. Responsibilities include coding, testing, debugging, and maintaining technical documentation while fostering team culture.

Develop and maintain Python microservices, solve complex problems, write well-tested code, collaborate with teams, and continuously improve engineering practices.