Senior Full-Stack Engineer

Pixelmatters is a digital product studio. We’re a team of strategists, designers and engineers creating top-quality digital products.

Our mission is to empower businesses to achieve their full potential by creating top-quality digital products while fostering great relationships along the way. We envision a world where great user experience is the norm, not the exception, inspiring businesses and people to be at their best.

We're looking for you, a meticulous, curious, and adaptable Senior Full-Stack Engineer, who has the ability to design and deliver scalable, high-performance digital products across the entire stack. You combine deep technical expertise with strong ownership, contributing to the team by building reliable solutions and helping maintain engineering standards.

Your role will focus on designing, implementing, and evolving full-stack architectures using NestJS and React, deployed on top of AWS. You will participate in technical discussions and help ensure solutions are secure, scalable, and maintainable. You will be involved in all stages of product development, from front-end implementation and API design to database modeling, infrastructure, and deployment workflows. While the primary focus will be on back-end development, you’ll contribute across the full stack to help deliver the product end-to-end.

Some of your day-to-day tasks will include designing scalable front-end and back-end architectures, developing and optimizing APIs, implementing complex UI components, defining database schemas, improving CI/CD pipelines, reviewing code, and proactively identifying performance, reliability, and security improvements across the system.

Requirements

• At least 5+ years of experience in software engineering, with strong experience as a Full-Stack Engineer.

• Proven expertise with NestJS and React, or similar JavaScript-based frameworks with the ability to make to make architectural decisions across front-end and back-end systems.

• Strong understanding of software architecture, system design, and engineering best practices.

• Solid experience designing and building RESTful APIs.

• Good knowledge of databases, including schema design, performance optimization, and data integrity practices (e.g., PostgreSQL, MySQL, MongoDB, Redis).

• Experience optimizing data flow across the stack, including API design, caching strategies, and front-end rendering performance.

• Good understanding of front-end architecture patterns, state management, performance optimization, and component-driven development in React.

• Proficiency with unit, integration, and end-to-end testing across both front-end and back-end.

• Strong experience with Git workflows and collaborative development in multi-branch environments.

• Fluency with agentic AI tools (such as Claude Code or Cursor) as a regular part of your development workflow.

• Good understanding of English (written and spoken).

• Portugal residency and Portuguese language proficiency are required for this role.

It would be awesome if you also have…

• Experience managing GitHub repositories and governance (e.g., branch protection rules, code review policies, access control) is a plus.

• Interest in Developer Experience (DevEx) and creating tools and platforms that make developers more productive

• Previous expertise with .NET.

• Experience with CI/CD pipelines, deployment strategies, and cloud environments (AWS).

• Experience with Docker and containerized applications.

• Knowledge of system observability, structured logging, monitoring, and performance profiling tools.

• Experience contributing to cross-project technical initiatives or architectural consistency.

• Passion for improving internal standards and engineering practices.

Benefits

• Quality-driven, inspiring, and collaborative work environment.

• Competitive salary and benefits, including health insurance.

• ClaudeCode account with generous tokens’ budget.

• We have a brand new office located at Porto’s downtown while continuing to back our “Remote as default, Office as an option” policy.

Compensation

• The salary range for this role is between €43,626 to €61,185 annual gross which includes meal, vacation, and Xmas allowance.