Senior Backend Engineer - Golang

About the role

This role involves designing, building, and evolving core backend services that establish a unified source of truth for product and merchant data across SumUp's ecosystem. The work emphasizes scalability, reliability, and ease of adoption for internal teams. A key part of the job is developing robust APIs, data models, and integration patterns, enabling various business units to access consistent and trustworthy information.

The engineer will also construct and enhance data ingestion, aggregation, and event-processing pipelines. These pipelines are crucial for consolidating signals from across the SumUp environment into actionable merchant intelligence. The position contributes to the long-term architectural vision and strategy for Product Catalogue and Merchant Intelligence services, helping to create platform capabilities usable across multiple systems and teams.

Success in this role means writing high-quality, maintainable backend code that adheres to engineering best practices for testing, observability, and production readiness. It requires close collaboration with product managers, data teams, and engineers to identify needs, resolve complex data challenges, and translate them into effective technical solutions. The engineer will also help define engineering standards and technical direction within a new squad operating in a dynamic domain.

The annual salary for this full-time role ranges from $90,000 to $135,000 USD.

Skills that matter here

• Golang: This role requires solid experience in Golang for designing and building scalable backend services.
• Postgres: The position involves hands-on experience with Postgres or similar relational databases for data storage and management.
• AWS: Experience with AWS is necessary for managing cloud infrastructure and deploying services.
• Docker: Familiarity with Docker is expected for containerization of applications.
• Kubernetes: Experience with Kubernetes is required for orchestrating containerized workloads.
• Terraform: The role uses Terraform for managing infrastructure as code.

Who this role suits

• A person with a strong sense of ownership who can work independently and navigate ambiguous situations.
• Someone who communicates clearly and prefers a collaborative approach when working with product, data, and engineering teams.
• An individual with a background in building and operating reliable production systems in backend engineering.
• A professional who enjoys contributing to architectural strategy and defining engineering standards in evolving domains.

From the employer

What you’ll do

• Design, build, and evolve foundational backend services that create a shared source of truth for product and merchant data across SumUp, with a strong focus on scalability, reliability, and ease of adoption by internal teams.
• Develop and maintain robust APIs, data models, and integration patterns that enable teams across the business to access consistent and trustworthy product and merchant information.
• Build and improve data ingestion, aggregation, and event-processing pipelines that bring together signals from across the SumUp ecosystem into actionable merchant intelligence.
• Contribute to shaping the long-term architecture and strategy for the Product Catalogue and Merchant Intelligence services, helping establish platform capabilities that can be used across multiple systems and teams.
• Write high-quality, maintainable backend code following engineering best practices for testing, observability, and production readiness.
• Collaborate closely with product managers, data teams, and engineers across SumUp to identify needs, solve complex data challenges, and turn them into effective technical solutions.
• Work across squad and domain boundaries to support integrations, improve data consistency, and enable better internal tools, workflows, and merchant experiences.
• Help define engineering standards, technical direction, and ways of working in a newly established squad operating in a complex and evolving domain.

You’ll be great for this role if you have

• Strong professional experience in backend engineering, building and operating reliable production systems.
• Solid experience with Golang and designing scalable backend services.
• Strong knowledge of API design, system design, and data modeling.
• Hands-on experience with Postgres or similar relational databases.
• Experience with AWS, Docker, Kubernetes, and infrastructure-as-code tools such as Terraform.
• Familiarity with event-driven architectures and message brokers such as RabbitMQ or Kafka.
• A strong ownership mindset, with the ability to work independently and navigate ambiguity.
• Clear communication skills and a collaborative approach to working across product, data, and engineering teams.

Why you should join SumUp

• 🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup.
• 🧑‍🔬 We take learning and experimentation seriously with Hack Days every second Friday, and entire global Hack Weeks.
• 🌈 Commitment to Diversity and Inclusion: Be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced.
• 📚 A dedicated annual L&D budget of €2,000 for attending conferences and/or advancing your career through further education.
• 🚀 Enrolment onto our VSOP program: You will own a stake in SumUp’s future success.
• 💶 A corporate pension scheme where we match up to 20% of your contributions.
• 🔄 30 Days Sabbatical: Enjoy the unique opportunity to take a well-deserved break with our 30 days sabbatical benefit after completing 3 years of employment with SumUp.
• 🔗 Referral Bonus: Earn additional rewards by referring talented individuals to join the SumUp team.
• 🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches.