Developer Experience Engineer - Quality Infrastructure

SumUp builds financial tools that help millions of small merchants run and grow their businesses. Within this mission, the Global Bank Team is responsible for creating the foundation of SumUp’s digital banking platform - used by merchants across multiple regions. As we scale, we're investing heavily in developer experience, automation, and productivity.

About the RoleWe’re looking for a Developer Experience Engineer who can supercharge how 200+ engineers build and ship banking features. You’ll create the tools, infrastructure, and platforms that eliminate friction, improve reliability, and raise the engineering bar across the tribe - directly shaping the pace and quality of SumUp’s global banking platform.

If you want to prove that great tooling can be a competitive advantage, this is the place to do it.

What You’ll Work On:

Infrastructure \& Platforms

Build performance monitoring and regression-detection platforms

Create reusable data-generation systems and merchant/transaction factories

Develop shadow-traffic and automated validation infrastructure

Implement foundations for deterministic, automation-gated deployments

Developer Productivity \& Tooling

Improve CI/CD reliability, speed, and observability

Build internal SDKs, CLIs, and automation frameworks

Drive adoption of contract testing and integration-first patterns

Create workflows that turn production incidents into automated coverage

Architecture \& Systems

Modernize automation architecture and integration patterns

Design tooling that reduces deployment lead time and boosts confidence

Embed with squads to understand pain points and ship high-leverage solutions

What Success Looks Like:

60%+ reduction in manual validation

Faster lead time across all squads

70%+ integration coverage with better tooling

Fully automated Dev/Staging deployments for all teams

What You Bring:

Engineering Excellence

Experience in Kotlin, Go, Python, Java, or similar

Built internal tools, SDKs, or frameworks used by other engineers

Deep understanding of microservices, event-driven systems, and CI/CD

Hands-on with Docker, Kubernetes, AWS, and modern observability stacks

Developer Experience Expertise

Improved CI/CD or DevEx tooling at scale

Experience with performance testing, distributed tracing, load testing

Designed integration/testing frameworks or developer automation

Mindset

You optimize for leverage, not ticket throughput

You care deeply about developer happiness and productivity

You collaborate, embed with teams, and take ownership

You thrive in autonomy and low-bureaucracy environments

Nice to Have:Experience with Kafka, Pact, fintech environments, PostgreSQL, developer portals, or open-source tooling.

Why you should join SumUp

We’re a truly global team of 3200+ people from 80+ countries, spread across 4 continents

Be part of a global tribe building a banking solution from the ground up and delivering impactful solutions to the real-life problems of millions of SumUp merchants all over the world

Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University leadership cohort and a yearly learning budget (R$10.000/ year).

Enrollment in our virtual stock ownership program - you will own a stake in SumUp’s future success

Access to our Employee assistance program for mental health as well as Fitness and language learning benefits.

You’ll attend global offsites and/or hackathons

Sabbatical program for tenured SumUppers

Join a global team where you belong: Check out our D\&I Initiatives and Employee Resource Groups such as Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, and more

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America and the United States work together to ensure that the small business owners we partner with can be successful doing what they love.

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate.

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.