Senior Backend Engineer

At ComparaJa.pt (Permanent), in Lisbon, Portugal
Expires at: 2026-10-06
Remote policy: Partial remote

We are looking for a highly skilled and experienced Senior Backend Engineer to drive the architecture and development of our high-quality software. You will own complex technical features end-to-end, ensuring that our products are built to modern engineering standards while championing a culture of code quality and technical excellence. The ideal candidate will have a deep background in both frontend and backend development, experience providing technical mentorship to fellow engineers, and a passion for optimizing application performance and system scalability.

This is an office role based in Alvalade, Lisbon with flexibility to work remotely.

Key Responsibilities

• Drive the development of high-quality software: Take hands-on ownership of complex backend features from end to end. Write robust code while ensuring solutions meet business requirements and adhere to the highest standards of performance, security, and scalability.
• Optimize the codebase and developer experience: Identify technical debt and continuously improve tooling, build processes, and system architecture to increase engineering efficiency and reduce deployment bottlenecks.
• Mentorship and technical guidance: Provide hands-on support to junior and mid-level engineers. Elevate the team's technical bar through rigorous code reviews, pair programming, and active knowledge sharing.
• Champion modern development standards: Actively write testable, maintainable code and promote engineering best practices, including comprehensive automated testing, CI/CD integration, and clean architecture principles.
• Collaborate across functions: Work closely with product managers, designers, and other stakeholders to seamlessly translate business requirements into technical solutions and ensure a shared vision across the product lifecycle.
• Architectural contribution: Design robust backend systems and help drive technical decisions around tools, APIs, and frameworks, ensuring the long-term scalability and maintainability of the application.
• Innovate and explore: Continuously evaluate new technologies and methodologies to keep our tech stack modern. Leverage emerging tools to rapidly prototype ideas, solve complex problems, and accelerate development.

Main requirements

About You

• Proven experience as a Senior Software Engineer, with a willingness to touch both backend and some frontend application development.
• Strong interpersonal skills and ability to effectively communicate with teams across the organisation.
• You have an analytical mindset to develop the best-fit technical solution.
• You have an understanding of IT infrastructure, architecture, as well as a good understanding of non-technical parts of the business.
• You are comfortable working in an international environment.

Skills Required:

• Experienced working through the design, development, release cycle, and delivering software products to market, with a track record of successful delivery of software applications as an individual and tech leader
• Experience with managing the development of SaaS and cloud-based applications
• Our stack is: C#, Python, Nuxt, PostgreSQL, all on AWS. The more experience in each the better, but all definitely not necessary.
• Fluency in Portuguese and English is required.

Start date: as soon as possible

Benefits & Perks

What We Offer

• Health insurance
• Meal card
• Transport subsidy
• Opportunity to work on meaningful projects that power internal operations
• A supportive, fast-moving, and collaborative team environment