Senior Back-End 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 Back-End Engineer, who thrives on building scalable, reliable, and high-performance systems using JavaScript-based technologies. You write clean, well-tested code, care deeply about architecture decisions, and bring a collaborative mindset that elevates the people around you. Your role will focus on designing, building, and maintaining back-end systems using Node.js and frameworks like NestJS, from database design and API development to system architecture. You'll play a key role in shaping how our applications are structured under the hood, making decisions that impact performance, security, and long-term maintainability. Some of your day-to-day tasks will include developing and optimizing RESTful APIs, designing and maintaining databases, writing tests across multiple layers, and ensuring systems remain scalable and resilient as products grow.

Requirements

At least 7+ years of experience in software engineering, with strong experience as a Back-End Engineer. Proven expertise with NestJS or similar Node.js-based frameworks, with the ability to make architectural decisions across 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, including API design, caching strategies, and back-end performance. Proficiency with unit, integration, and end-to-end testing on the back-end. Strong experience with Git workflows and collaborative development in multi-branch environments. Excellent understanding of English and Portuguese (written and spoken). It would be awesome if you also have… Experience with CI/CD pipelines, deployment strategies, and cloud environments (AWS, GCP). Experience with Docker and containerized applications. Familiarity with front-end technologies and JavaScript frameworks (React or similar). Familiarity working in high-regulated markets.

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. Apply To This Job