Senior Fullstack Engineer - ComparaJá

Senior Fullstack Engineer | ComparaJá.pt – Lisbon (Onsite)

Job Summary

We are looking for a highly skilled and experienced Senior Fullstack 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.

Key Responsibilities

• Drive the development of high-quality software: Take hands-on ownership of complex full-stack 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 full-stack 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.

About You

• Proven experience as a Senior Software Engineer, with a willingness to touch both backend and 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

About Us

ComparaJá.pt is a leading platform for aggregating and comparing financial products and services in Portugal. Founded in 2015 as part of Samlino Group (samlinogroup.com) we are operating across three European markets, our group empowered over 10 million users last year alone.

At ComparaJá.pt, our mission is to help Portuguese consumers make informed, confident decisions across all areas of personal finance—whether banking, insurance, or utilities—by providing easy access to unbiased, accurate information and free comparisons. Our vision is to become the go-to personal finance platform for consumers, partners, media, and other stakeholders, helping people identify and choose the best solutions for their needs—saving time and money in a simple and transparent way.

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

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