Backend Developer

HireHi; Berlin; Vor Ort; EUR 90.000 - 140.000; Vollzeit

Benefits dieser Stelle

Urban Sports Club subsidy

Kita placement assistance

relocation assistance

subsidised office lunches

Zusammenfassung

SumUp ищет талантливого бэкэнд-инженера в Берлине для разработки сервисов и API, централизованных журналов жизненного цикла Merchants и инфраструктуры для комиссий продаж.

Задачи включают проектирование контрактов API, обработку больших объёмов данных и обеспечение стабильности систем. Работа в офисе Берлина в офис-ориентированном формате, социальные и финансовые бенефиты и возможность участия в программе VSOP.

Qualifikationen

• Надежная бэкэнд-инженерия на Go или аналогичном типизированном языке. Опыт проектирования API и распределённых систем.
• Опыт работы с реляционными БД (PostgreSQL, Snowflake) и выбором подходящей базы.
• Опыт построения событийных систем на Kafka, понимание event sourcing и CDC.

Aufgaben

• Агрегировать данные по каналам привлечения и агентам продаж.
• Разрабатывать API-контракты, схемы и интеграционные паттерны для команд.
• Строить Lifecycle Event Log как централизованный источник событий.
• Разрабатывать внутренние back-office и API для мониторинга комиссий и портфелей.
• Обеспечивать тестирование, наблюдаемость и реагирование на инциденты.

Kenntnisse

Go

APIs

Distributed systems

PostgreSQL

Snowflake

Kafka

Event sourcing

Fintech

Greenfield

Observability

Jobbeschreibung

Описание:

SumUp provides simple and affordable financial tools that help small businesses manage payments, finance, and customer relationships. Its services are used by over 4 million businesses across 36 markets.

Задачи:

• Aggregate data across the SumUp ecosystem to identify which acquisition channel or sales agent drove merchants to valuable actions


• Establish data models, API contracts, and rules to automate commission workflows for sales agents, partners, and merchant referrals


• Build the Lifecycle Event Log with the Merchant Intelligence squad, creating a centralized store of curated merchant lifecycle events for attribution, recommendations, customer support, and sales


• Build internal back offices and APIs for sales representatives and leaders to monitor commissions, modify commission plans, manage portfolios, and resolve disputes


• Define and document API contracts, schemas, and integration patterns for other engineering teams


• Establish testing, observability, and incident response best practices within the new squad


• Use AI and agentic coding tools to scaffold services, write tests, explore unfamiliar code, and draft documentation while maintaining accountability for shipped work.

Требования:

• Strong backend engineering background in Go, or experience with a typed language and readiness to ramp up quickly


• Experience designing APIs and distributed systems with clear contracts, versioning, and integration patterns


• Proficiency with relational and analytical databases, including PostgreSQL and Snowflake, and ability to select the right database for each use case


• Experience building Kafka-based event-driven systems and understanding of event sourcing and CDC patterns


• Experience with auditable, high-trust systems in fintech, payments, or similar domains


• Experience building services from scratch in greenfield, early-stage squads with limited prior context


• Experience with testing, observability, and incident response practices


• Ability to take end-to-end ownership, adapt to shifting priorities, bridge technical and non-technical audiences, explain trade-offs, and make pragmatic decisions


• Mentorship instincts and ability to raise the bar for colleagues

Условия:

• Work from the Berlin office in an office-first setup


• Hack Days every second Friday and global Hack Weeks


• Annual L&D budget of €2,000 for conferences and/or further education


• Enrolment in the VSOP program, offering a stake in SumUp’s future success


• Corporate pension scheme matching up to 20% of contributions


• 30-Day sabbatical after completing 3 years of employment


• Referral bonus


• Other benefits include an Urban Sports Club subsidy, Kita placement assistance, relocation assistance, and subsidised office lunches.