Senior Fullstack Software Engineer (Kotlin/Java/React) - Fintech

United States Digital Space LLC; Berlin; Vor Ort; EUR 90.000 - 130.000; Vollzeit

Benefits dieser Stelle

Hybrid work model (Berlin campus 2 day

27 days holiday

Educational Budget €1,000

Health & Fitness program

Employee Share Purchase Plan

Zusammenfassung

United States Digital Space LLC in Berlin is hiring a Senior Fullstack Software Engineer (Kotlin/Java/React) to join our Fintech team and build wallets, payments, and anti-fraud solutions. You’ll work on our payments engine powering the company globally.

You will design and deliver highly scalable systems, lead backend and frontend efforts with Java, Kotlin, Spring, React, and PostgreSQL, and own services end-to-end in a fast-growing, international environment.

Qualifikationen

• Proven experience designing and delivering software systems in complex environments at global scale.
• Deep backend engineering expertise with distributed systems.
• Hands-on mastery of Java, Kotlin, Spring / Spring Boot, Hibernate, and JUnit.
• Strong frontend experience with TypeScript and React and PostgreSQL.
• Ownership mindset with passion for automation, CI/CD, and reliability.

Aufgaben

• Design, build, and deliver highly scalable software systems used in global environments.
• Lead backend and frontend engineering efforts with a focus on distributed systems.
• Own services end-to-end and contribute to infrastructure automation and CD.
• Drive high-quality software design using design patterns, SOLID, and DDD.
• Build secure, resilient systems through secure coding practices.
• Influence engineering culture through mentorship and continuous improvement.

Kenntnisse

Java

Kotlin

React

TypeScript

Tools

Spring / Spring Boot

Hibernate

JUnit

PostgreSQL

Jobbeschreibung

Company Description

As the world’s pioneering local delivery platform, our mission is to deliver an amazing experience, fast, easy, and to your door. We operate in around 65 countries worldwide, powered by tech, designed by people. As one of Europe’s largest tech platforms, headquartered in Berlin, Germany, the company has been listed on the Frankfurt Stock Exchange since 2017 and is part of the MDAX stock market index. We push hard, learn quickly and stay human along the way. It’s this wonderful mix of high performance and real community that makes the company a place where ambition and belonging grow side by side. If you’re curious, collaborative and ready to dive deep into meaningful work, you’ll fit right in.

Job Description

We are on the lookout for a Senior Fullstack Software Engineer (Kotlin/Java/React) to join our Fintech team and build worldwide innovative Wallet, Payment, and Anti-Fraud solutions with us. Work and scale our internal Payments engine that would handle payments for the entire the company. If you're a creative problem solver who is eager to deliver solutions and hungry for a new adventure, an international workplace is waiting for you in the heart of Berlin!

Be part of building the financial backbone of the company. You’ll develop products that empower millions of customers and merchants, from seamless payments to innovative financial solutions like wallets and credit.

• Design, build, and deliver highly scalable software systems operating in complex, global business environments, used across more than 70 countries
• Lead backend and frontend engineering efforts with a strong focus on distributed systems, leveraging Java, Kotlin, modern frameworks such as Spring / Spring Boot, Hibernate, and JUnit and frontend technologies such as React / TanStack.
• Own services end-to-end by embracing a true “you build it, you run it” mindset, with deep involvement in infrastructure automation and continuous deployment.
• Drive high-quality software design by systematically applying design patterns, SOLID principles, and Domain-Driven Design (DDD).
• Build secure, resilient systems by applying secure coding best practices throughout the development lifecycle.
• Influence engineering culture through hands‑on leadership, technical mentorship, and continuous improvement.

Qualifications

• Proven experience designing and delivering software systems in highly complex business domains at global scale.
• Deep backend engineering expertise with a strong preference for distributed systems.
• Hands‑on mastery of Java, Kotlin, Spring / Spring Boot, Hibernate, and JUnit.
• Strong hands‑on experience with TypeScript and React and PostgreSQL.
• A strong engineering ownership mindset with a passion for automation, CI/CD, and reliability.

Additional Information

Ensuring you and all our Heroes are looked after, happy, and healthy is always on the menu. Because if you’re in good shape, then we’re in good shape.

• Make the most of our hybrid working model and join the team for face‑to‑face connection and collaboration in our beautiful Berlin campus 2 days a week
• We offer 27 days holiday with an extra day on 2nd and 3rd year of service
• We will support you in developing yourself and your career growth opportunities: 1.000 € Educational Budget, Language Courses, Parental Support and access to the Udemy Business platform to explore a variety of online courses.
• Get moving and release those wonderful, mind‑boosting endorphins: Health Checkups, Meditation \& Gym.
• Cash. Dough. Cheddar. Whatever you call it, we’ll help you with it: Employee Share Purchase Plan, Sabbatical Bank, Public Transportation Ticket Discount, Life \& Accident Insurance, Corporate Pension Plan
• The power of getting together over some food is unrivaled. Here are a few ways to help you do that. All the yum: Digital Meal Vouchers and Food Vouchers.

We believe diversity and inclusion are key to creating not only an exciting product, but also an amazing customer and employee experience. Fostering this starts with hiring - therefore we do not discriminate on the basis of racial identities, religious beliefs, color, national origin, gender identities or expressions, sexual orientations, age, marital or disability statuses, or any other aspect that makes you, you.

We encourage you to let us know if you need any accommodations or specific accessibility support to ensure a smooth interview experience—just let us know with an email to our Inclusion Officer at [e-mail].

Severely disabled applicants with equal qualifications will be given preferential consideration.

You're welcome to share your pronouns (he/she/they) right from the start so we can address you respectfully from our first contact.