kotlin backend developer

Enfint; Berlin; Vor Ort; EUR 70.000 - 110.000; Vollzeit

Benefits dieser Stelle

Virtual Stock Option programme

Annual L&D budget of €2000

Corporate pension scheme with up to 20

28 days of paid leave plus public holl

Urban Sports Club subsidy

Kita placement assistance

Subsidised office lunches

Break4me: 1-month sabbatical after 3 ●

Referral bonus

Zusammenfassung

Enfint is seeking a backend engineer to develop and evolve high-performance services using Kotlin and Spring Boot in Berlin. You will design data schemas, build Kafka-based integrations, and ship production-grade code.

Collaborate with mobile and product teams, rely on CI/CD pipelines, and participate in pair programming to tackle concurrency and maintain architecture. Nice to have Kubernetes and AWS experience.

Qualifikationen

• 3+ years of backend engineering on the JVM stack (Kotlin and Spring Boot preferred).
• Solid data modelling, design patterns, and system architecture knowledge.
• Experience with Kafka, PostgreSQL, and AWS in production at scale.
• Fluent English communication with stakeholders.

Aufgaben

• Develop and evolve high-performance backend services and APIs using Kotlin and Spring Boot.
• Design and maintain robust data schemas and event-driven integrations using Kafka.
• Write clean, well-tested, production-grade code and participate in code reviews.
• Collaborate with mobile and product teams to ship end-to-end features.
• Engage in daily pair programming to solve concurrency challenges and maintain architectural standards.
• Manage the development lifecycle, including CI/CD pipelines and production service health.
• Use AI coding agents to automate tasks and increase shipping velocity.
• Refactor and migrate mission-critical domain logic to simplify sales and catalog experiences.

Kenntnisse

Kotlin

Spring Boot

Java/JVM

Kafka

PostgreSQL

AWS

Kubernetes

Distributed systems

Tools

Kubernetes

Jobbeschreibung

Описание

SumUp provides a point-of-sale solution that enables cafes, shops, bars, hair salons, and other businesses to manage product catalogs, inventory, business analytics, compliance, and loyalty tools. The company focuses on empowering small business owners through a suite of financial and operational tools.

Задачи

• Develop and evolve high-performance backend services and APIs using Kotlin and Spring Boot
• Design and maintain robust data schemas and event‑driven integrations using Kafka
• Write clean, well‑tested, production‑grade code and contribute to code reviews
• Collaborate with mobile and product teams to ship end‑to‑end features
• Engage in daily pair programming to solve concurrency challenges and maintain architectural standards
• Manage the development lifecycle, including CI/CD pipelines and production service health
• Use AI coding agents to automate tasks and increase shipping velocity
• Refactor and migrate mission‑critical domain logic to simplify sales and catalog experiences

Требования

• 3+ years of experience in backend engineering with the JVM stack (Kotlin and Spring Boot preferred)
• Solid understanding of software design patterns, data modeling, and system architecture principles
• Experience with Kafka, Postgres, and AWS in a production environment at scale
• Experience with or strong interest in distributed and fault‑tolerant systems
• Fluent in English for clear communication with stakeholders
• Nice to have: Experience with Kubernetes and cloud‑native observability tools, knowledge of different programming paradigms, familiarity with high‑scale applications, desire to share knowledge

Условия

• Virtual Stock Option programme
• Annual L&D budget of €2000
• Corporate pension scheme with up to 20% matching
• 28 days of paid leave plus public holidays and special leave days
• Urban Sports Club subsidy
• Kita placement assistance
• Subsidised office lunches
• Break4me: 1‑month sabbatical after 3 years of service
• Referral bonus