Senior Backend Engineer (Golang) - Global Bank

TN United Kingdom; London; On-site; GBP 60,000 - 100,000; Full time

Job summary

Join a forward-thinking company as a Senior Backend Engineer and help build a digital banking platform for small merchants globally. You will play a crucial role in transitioning to a unified Global Bank by developing high-level APIs and maintaining resilient event-driven systems. This role offers the opportunity to work with a diverse, global team and contribute to impactful fintech products that empower small businesses. With a commitment to innovation and inclusivity, you will thrive in an environment that fosters personal and professional growth while making a difference in the fintech landscape.

Benefits

Annual Learning & Development Budget

Virtual Stock Ownership Program

Global Offsites and Hackathons

Diverse Team Environment

Qualifications

• Solid programming experience in Golang and interest in Java, Kotlin, Elixir.
• Extensive experience in distributed, fault-tolerant, event-driven systems.

Responsibilities

• Collaborate to design and build a unified global platform with high availability.
• Build and maintain resilient event-driven systems with zero downtime.

Skills

Golang

Java

Kotlin

Elixir

Distributed Systems

Event-Driven Architecture

System Design

Data Modeling

API Design

Ownership and Pride in Work

Tools

Kafka

Postgres

SQL Databases

AWS

Docker

Kubernetes

GitHub Actions

ArgoCD

Prometheus

Grafana

Job description

Social network you want to login/join with:

col-narrow-left

Client:

Location:

London, United Kingdom

Job Category:

-

EU work permit required:

Yes

col-narrow-right

Job Reference:

04dea009fc02

Job Views:

6

Posted:

24.04.2025

Expiry Date:

08.06.2025

col-wide

Job Description:

In the Global Bank tribe, we are building the infrastructure and core services needed to provide our merchants with a digital bank account that allows them to be successful at doing what they love. Our goal is to become the most popular banking partner for small merchants globally by offering a high-quality banking experience tailored to small business needs - effortless, simple, and affordable.

Joining the means you’ll play a key part in helping us build SumUp's own digital bank. Be part of a global, autonomous, cross-functional team that takes an aspect of our product and perfect it from concept to execution. Working alongside a global team with 32 nationalities across London, Berlin, São Paulo, Sofia and Vilnius who love to take ownership, work with purpose, and help businesses thrive.

As a Senior Backend Engineer (Golang), you will be responsible for supporting the transition from a localized setup with regional banks to a unified Global Bank. One of the main challenges will be to support our move to fully distributed, event-driven architecture.

What You’ll Do

• Collaborate with the global team to design and build a unified global platform, including high-level APIs for multiple regions and local implementations, ensuring high availability and observability.
• Build and maintain these highly available, self-healing, and resilient event-driven systems.
• Support the migration of systems and processes, ensuring zero downtime for clients, and design, implement, and support high-value features for customers.
• Improve test coverage for existing services and own the end-to-end delivery of changes, including testing, observability, and monitoring.
• Continuously improve our engineering culture by refining best practices, clarifying problems and opportunities, prototyping solutions, providing comprehensive documentation and selecting new tools and technologies.

You’ll be great for this role if you have

• Solid programming experience in Golang and are interested in working with additional languages such as Java, Kotlin and Elixir.
• Extensive experience as a Backend Engineer specializing in distributed, fault-tolerant, and event-driven systems.
• Proven experience in system design, data modeling, and API design.
• Hands-on experience with Kafka, Postgres, and SQL databases.
• Prior experience with modern cloud technologies (AWS, Docker, Kubernetes).
• Experienced with CI/CD products such as GitHub Actions and ArgoCD.
• You take pride in your work, have a keen sense of ownership, and are dedicated to writing clear, maintainable, and testable code.
• You’re a product-focused engineer who is passionate and curious about solving user challenges.

Any of the following would be considered a plus

• Experience with monitoring tools - Prometheus, Grafana, Honeycomb
• Experience in the fintech industry

Why you should join SumUp

• The opportunity to work on large scale fintech products used by millions of small businesses around the world
• Work on a high impact squad that is at the core of the Bank Tribe
• A dedicated annual Learning & Development budget for attending conferences and/or advancing your career through further education
• Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success
• You’ll attend global offsites and/or hackathons.
• Join a truly global SumUp team of + people from 80+ countries, spread across 4 continents

About SumUp

Be empowered to do more that matters.

At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.

Our commitment to small businesses is reflected in our diverse team of over 3, SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.

SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on 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. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited.

Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website, and follow our journey on LinkedIn and Instagram.

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 % 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.