Top Software Engineer Jobs in Portugal

Train large-language models to improve code quality by comparing snippets, providing feedback, and refining AI-generated code. Requires strong communication skills and attention to detail.

Responsible for training large-language models by reviewing, ranking, and improving AI-generated code. Requires strong software engineering skills.

As a Software Engineer, you will develop a 911 emergency eco-system, design resilient services, and enhance emergency communications through innovative technologies.

As a Software Engineer at SingleStore, you'll own projects end-to-end, develop new features, enhance performance, and work collaboratively in a fast-paced environment.

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

As a Fullstack Software Engineer, you'll design and maintain scalable features, integrate AI capabilities, optimize cloud infrastructure, and own projects end-to-end for an AI-driven customer support platform.

As a Senior Software Engineer, you will enhance the Snyk API and Web Product, develop backend components, implement tests, and mentor junior engineers while ensuring code quality in a collaborative environment.

As a Software Engineer, you'll develop software for Ceph and distributed storage, collaborating with a global team to enhance cloud solutions.

As a Software Engineer, you will develop backend services and frontend counterparts, ensuring system reliability through testing and collaboration in an agile environment.

Review, rank, and improve AI-generated code to train LLMs: compare implementations, repair/refactor for correctness, efficiency, and style, and provide detailed feedback for RLHF pipelines. Work asynchronously as a remote contractor, injecting ratings, edits, and test results to improve model outputs.

Evaluate and improve AI-generated code: compare and rank snippets, repair and refactor for correctness, efficiency, and style, and inject detailed feedback and test results into the RLHF training pipeline as an asynchronous remote contributor.

Review, rank, and improve AI-generated code across languages, focusing on Ruby. Repair/refactor code, provide detailed written justifications, and inject ratings/edits/test results into the RLHF pipeline to help train models.

Evaluate, rank, repair, and refactor AI-generated code to improve correctness, efficiency, and style; provide detailed written feedback for RLHF pipelines; and help maintain the code-evaluation and training workflow remotely.

Review, rank, repair, and refactor AI-generated code to improve correctness, performance, and style. Provide detailed written feedback and edits for RLHF pipelines, converting expert judgments into signals used to train models. Work asynchronously as a remote 1099 contractor.

Build and maintain backend-first features and integrations for Triptease's marketing channels. Work across the full stack (primarily backend), design scalable distributed systems, implement CI/CD on cloud platforms, collaborate closely with product teams, pair program, write tests (TDD), and contribute to squad strategy and product quality.

The Staff/Lead Engineer role involves maintaining and enhancing video generation infrastructure, building monitoring tools, and ensuring scalable solutions while evaluating commercial impacts and guiding team direction.

Canonical is hiring a Software Engineer to develop features for Kubernetes, focusing on operators and integrations while collaborating in a distributed team.

Design and implement robust Rust services for trading and payments while focusing on reliability and performance, collaborating on distributed systems architecture.

Design and implement robust Rust services and foundational libraries for Kraken's core infrastructure, ensuring security and maintainability while collaborating on distributed systems architecture.

Lead design and evolution of the RUM platform to support frontend observability products. Build and scale real-time data pipelines using Kafka/Redis/Java, collaborate with SDK/FE/OpenTelemetry contributors, unify backend infrastructure across products, provide architectural direction for ambiguous high-impact problems, and mentor engineering teams.

Design and build production-grade GenAI platform components and backend services that integrate LLMs, embeddings, and agent frameworks into secure, scalable financial risk products. Define standards, drive architecture, ensure observability and operational ownership, and collaborate with product, data science, and engineering to deliver AI-powered user experiences.

Develop, test, and scale microservices mainly in Ruby, collaborating with teams to improve product features and system performance.

Build and optimize Alpaca's algo trading platform, focusing on high-performance brokerage services while leveraging frontend and backend engineering skills.

As a Software Engineer, you will develop features focused on business growth, collaborate with various teams, innovate customer experiences, and enhance application reach.

As a Mid-Level Backend Engineer, you'll enhance the reliability, observability, and scalability of the EVC platform by building API integrations, improving system performance, and strengthening infrastructure.