Senior Backend Engineer - Identity Lifecycle

Meyandy LLC; Berlin; Vor Ort; EUR 90.000 - 120.000; Vollzeit

Zusammenfassung

SumUp is seeking a Senior Backend Engineer to shape and scale our identity lifecycle platform. You will design and operate backend services, APIs, and event-driven workflows that power onboarding, identity verification, and KYC/KYB data collection.

You will work primarily in Go while maintaining existing Java services, evolve domain models, and drive reliability across critical systems in a collaborative, cross-functional environment.

Qualifikationen

• Proven backend engineering experience with high business impact.
• Strong knowledge of Go and Java; able to evolve existing Java services.
• Experience with API design, distributed systems, and data modeling.
• Familiarity with event streaming platforms like Kafka and modern observability tools.
• Experience deploying services in cloud environments such as AWS, with containerization (Docker) and orchestration (Kubernetes).

Aufgaben

• Design, build, and operate scalable backend services, APIs, event-driven workflows, and system integrations.
• Build reusable capabilities powering onboarding, identity verification, and regulatory data collection.
• Drive reliability and resilience through observability, failure handling, incident response, and long-term risk reduction.
• Work primarily with Go, while maintaining and evolving existing Java services.
• Evolve domain models and service boundaries, reducing legacy complexity and tightly coupled integrations.
• Own your work end-to-end from design through production rollout.
• Collaborate across teams to translate product and regulatory requirements into scalable technical solutions.
• Review code and designs, mentor engineers, and raise engineering standards.

Kenntnisse

Go

Java

API design

Distributed systems

Event streaming

Tools

Kafka

Grafana

Honeycomb

Docker

Kubernetes

AWS

Jobbeschreibung

About the team:

You’ll join one of the teams within SumUp’s Identity Lifecycle Mission, working on some of the most critical building blocks behind the merchant journey, from onboarding and identity verification to KYC/KYB, regulatory data collection, and managing customer identity throughout the entire lifecycle.

Today, many of these capabilities live across different flows, legacy services, and tightly coupled integrations. We’re on a journey to bring these pieces together into a more coherent, scalable platform, with shared data models, reusable services, and clear ownership boundaries.

As a Senior Backend Engineer, you won’t just be maintaining existing systems. You’ll have the opportunity to shape how our identity platform evolves, modernise critical services, and help build foundations that can support new regulations, markets, and product requirements without reinventing the wheel every time.

You’ll be part of one dedicated team, but the challenges we tackle often cross team and domain boundaries. You’ll work closely with Engineers, Product, Design, Compliance, Risk, and Operations, giving you the opportunity to influence solutions well beyond your own team.

If you enjoy solving complex backend problems, working in a highly collaborative environment, improving reliability, and building scalable capabilities that enable other teams to move faster, this could be an exciting opportunity to make a real impact at SumUp.

What you’ll do:

• Design, build, and operate scalable backend services, APIs, event-driven workflows, and system integrations.
• Build reusable capabilities that power merchant onboarding, identity verification, and KYC/KYB regulatory data collection.
• Drive reliability and resilience across critical services through better observability, failure handling, incident response, and long-term risk reduction.
• Work primarily with Go, while maintaining and progressively modernising existing services written in Java.
• Evolve domain models and service boundaries while reducing legacy complexity, duplicated logic, and tightly coupled integrations, always with a pragmatic, incremental mindset.
• Own your work end-to-end, from technical design and implementation to rollout and production follow-up.
• Work across team and domain boundaries, turning ambiguous product and regulatory requirements into clear, scalable technical solutions.
• Review code and designs, mentor engineers, and help raise engineering standards across the mission.

You’ll be great for this role if you have:

• Strong professional experience building and operating production backend systems with high business impact.
• Experience working with Go and Java and confidence in maintaining and evolving existing Java services.
• Strong knowledge of API design, distributed systems, asynchronous processing, data modelling, testing, and system design.
• Experience with event streaming platforms such as Kafka and modern observability tools such as Grafana or Honeycomb.
• Experience deploying and operating services in cloud environments such as AWS, ideally with Docker and Kubernetes.
• A strong ownership mindset, with the ability to take complex problems from definition through to production.
• Experience improving the reliability of business-critical systems and turning recurring incidents into lasting engineering improvements.
• Strong communication skills and a collaborative approach to working across Engineering, Product, Compliance, Risk, and Operations.

Nice to have:

• Experience in fintech, payments, KYC/KYB, identity verification, or regulatory systems.
• Experience translating regulatory and compliance requirements into clear, scalable engineering solutions, while helping brid… Berlin.