Sr. Software Engineer (Desenvolvedor Full Stack Senior) Technology & Data · Sao Paulo · in London

Collinson is a global loyalty and benefits company. We use our expertise and products to craft customer experiences which enable some of the world's best-known brands to acquire, engage and retain the most demanding and choice-rich customers. Our unique expertise and insight into high earning, frequent travellers allow us to create products and solutions for our clients that inspire greater customer engagement to drive more profitable relationships, enrich their travel experiences, protect what matters and assist in times of need.

While specialising in Financial Services, Travel and Retail, we also support clients in multiple sectors. We have worked with over 90 airlines, 20 hotel groups and more than 600 financial institutions and banks, with clients including Accor Hotels, Air France KLM, American Express, British Airways, Cathay Pacific, Diners Club, Mandarin Oriental, Mastercard, Radisson Hotel Group, Sephora, Visa and Vhi.

We take our 30 years' experience working with these kinds of household names in over 170 countries and help our clients to deliver the smarter experiences it takes to differentiate their propositions and help them win deeper devotion with their customers. Collinson is a privately-owned entrepreneurial business with 2,000 passionate people working in 20 locations worldwide. Our solutions include Priority Pass, the world's best known airport experiences programme, while we are also the trusted partner behind many of the leading financial services, airline and hotel brand's reward programmes and loyalty initiatives.

Purpose of the job

As a Senior Software Engineer, you'll be a key figure in one of our cross-functional teams, designing and building cloud-native, greenfield products from the ground up. You'll take ownership of features and new capabilities, working closely with a Product Manager, Engineering Manager, and your teammates to deliver high-quality software that is reliable, scalable, and secure.

You'll be hands-on every day; refining stories, writing code, reviewing pull requests, and solving interesting technical problems. You'll bring strong engineering practices to the team and help shape the way we build software. While you're not expected to manage people, your technical depth and experience mean you'll naturally become a point of reference for others on the team.

We have a modern TypeScript stack, cloud-native environment, containerised deployments, and a strong focus on automation, observability, and AI-enhanced development. If you enjoy solving complex problems, delivering high-impact features, and being part of a high-trust, high-autonomy engineering culture, we'd love to have you onboard.

Key responsibilities

• Write clean, efficient, and testable code, owning complex features and services from design to deployment.
• Work closely with your squad (PMs, engineers, QAs) to refine requirements, scope technical solutions, and deliver great software.
• Champion automated testing and CI/CD. You'll write unit, integration, and contract tests, and help make our systems robust and reliable.
• Build, deploy, and monitor services in AWS using tools like Terraform, Kubernetes, and GitHub Actions.
• Take responsibility for the health, performance, and maintainability of the code you ship.
• Help evolve our engineering standards and practices by sharing knowledge, reviewing code, and learning from incidents.
• Champion observability. You'll be using DataDog to monitor services and debug production issues.
• Being a mentor and teacher to less experienced engineers.
• Develop in an Agile environment using tools like Git, Jira, and Confluence, with a mindset of collaboration and continuous improvement.

Non-negotiable

• 5+ years of experience in software development with a strong focus on TypeScript (Node.js & React) and excellent knowledge of JavaScript fundamentals.
• Experience building and running production systems in AWS using tools like EKS, Lambda, RDS.
• Skilled in designing and building GraphQL and RESTful APIs, with practical knowledge of MongoDB, PostgreSQL, and Kafka.
• Comfortable developing software within an event-driven architecture.
• Deep knowledge of writing automated tests with Jest, Pact, and the principles of TDD.
• Comfortable building and maintaining CI/CD pipelines (we use GitHub Actions) for code deployment primarily using Terraform.
• Experience using DataDog (or similar) to monitor services and debug production issues.
• Experience working in Agile environments using tools like Git, Jira, and Confluence, with a mindset of collaboration and continuous improvement.
• Able to take a problem and run with it, bringing a pragmatic, product-focused approach to software delivery.

Personal attributes

• Show initiative: self-driven, independent problem-solver who takes ownership end-to-end.
• Innately curious: constantly questioning, learning, and seeking deeper understanding.
• Innovative: think outside the box and be creative and implement ideas that enhance our systems - innovation is valued highly at Collinson.
• Communicative collaborator: share openly, work across teams, and integrate feedback.
• Strong analytical and investigative problem-solving skills.
• Hungry and eager to make a difference at a technical and operational level.
• The ability to get things done – we don't like micro-management, but we expect you to do the right thing.
• An attitude of being proud of your code and taking ownership.

Benefit plan

• Medical, dental, life insurance for employees;
• Meal voucher;
• Transportation or parking voucher;
• Home office 3x a week;
• Priority Pass membership (eligible after 90-day probation period);
• Work from anywhere for 8 weeks (eligible after 90-day probation period);

Collinson is an equal opportunity employer and welcomes differences in all their forms including: colour, race, ethnicity, gender identity, sexual orientation, neurodivergence, family status, age, individuals with disabilities and people from all backgrounds, cultures and experiences as we strongly believe this contributes to our ongoing success.

We are focused on continually evolving our purpose driven, high performing culture, providing an environment where our people have the opportunity to achieve their full potential and do interesting and meaningful work. Our company values are: Act smarter, Do the right thing, One team and Be insight led. These help guide everything we do internally in terms of how we think, act and interact, right through to how we deliver value to our customers and clients.

In your application, please feel free to note which pronouns you use (For example - she/her/hers, he/him/his, they/them/theirs, etc.).