Senior Software Engineer – Java (f/m/d)

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

Benefits dieser Stelle

Health & Wellbeing

Udemy Training

Remote work

Onsite events

Paid leave

Workcation

Location-based perks

Zusammenfassung

United States Digital Space LLC in Germany is seeking a Senior Software Engineer – Java to design, build, and maintain scalable backend systems for our identity verification platform. You will work in a cross-functional team, contribute to architecture decisions, and mentor engineers across the stack.

The role emphasizes performance, security, and high availability for millions of users worldwide. Berlin or Munich base recommended; hybrid office option available, with remote-friendly policies

Qualifikationen

• 5+ years of professional software development experience with Java and backend systems.
• Expertise in Java EE and Spring / Spring Boot (or Play Framework).
• Strong knowledge of JVM performance tuning and optimization.
• Relational databases such as MySQL or PostgreSQL.
• RESTful API design and development experience.
• Experience with unit testing frameworks (JUnit, Mockito) and TDD.
• Familiarity with CI/CD pipelines, Git, Maven, and Docker.
• Experience in Agile/Scrum environments.
• Strong analytical and problem-solving skills with a collaborative mindset.

Aufgaben

• Design, develop, and maintain robust Java applications and microservices for the identity verification platform.
• Contribute to architecture decisions for scalable, secure solutions.
• Write clean, well-documented code following engineering standards.
• Collaborate with product, UX, DevOps, and QA in a cross-functional setup.
• Identify performance bottlenecks and optimize high-volume transactions.
• Stay updated with latest technologies and drive continuous improvement.
• Mentor junior developers and conduct code reviews.

Kenntnisse

Java

Java EE

Spring / Spring Boot

RESTful APIs

JUnit / Mockito

CI/CD

Git / Maven

Docker

Agile / Scrum

Kubernetes

AWS

Kafka / RabbitMQ

Tools

Kubernetes

AWS

Docker

Kafka

Jobbeschreibung

the company is a leader in digital identity and fraud prevention in Europe with a mission to transform trust into the most powerful asset in the digital world, empowering enterprises with AI-driven, SaaS-based identity solutions that deliver scalable security, adaptive compliance, and real-time fraud prevention. Through its broad portfolio of digital identity and fraud prevention solutions, the company establishes, maintains and enriches trust throughout the customer journey, ensuring businesses can confidently and securely operate while leveraging digital identity to drive growth, security and scalability.

The company has offices in Germany, United Kingdom, Romania and France, and is backed by renowned institutional investors, including Corsair Capital and Seventure Partners. Its portfolio of international clients spans a wide range of end markets including financial services, telecommunications, travel & mobility, gaming, and other industries.

This position is based in Germany, preferably Munich / Berlin (Hybrid office also available).

As a Senior Software Engineer – Java, you will play a key role in designing, building, and maintaining scalable, secure, and high-performance backend systems for our identity verification platform. Working in a cross-functional team, you will contribute to architecture decisions, mentor team members, and help shape the technical direction of our products that serve millions of users globally.

Key Responsibilities

• Design, develop, and maintain robust Java applications and microservices powering the company’s identity verification platform.
• Contribute to architectural decisions and system design for scalable, secure, and maintainable solutions.
• Write clean, efficient, and well-documented code following best practices and engineering standards.
• Collaborate closely with product managers, UX designers, DevOps, and QA engineers in a cross-functional setup.
• Identify performance bottlenecks, debug complex issues, and optimize applications for high-volume transactions.
• Stay updated with the latest technologies and contribute to technical innovation and continuous improvement.
• Guide and mentor junior developers, conduct code reviews, and share knowledge within the team.

Preferred Experience

• 5+ years of professional software development experience with a strong focus on Java.
• Expertise in Java EE and Spring / Spring Boot (or Play Framework).
• Solid understanding of JVM performance tuning and optimization.
• Proficiency with relational databases (MySQL, PostgreSQL).
• Strong experience in RESTful API design and development.
• Experience with unit testing frameworks (JUnit, Mockito) and test-driven development (TDD).
• Familiarity with CI/CD pipelines, Git, Maven, and Docker.
• Experience working in Agile/Scrum environments.
• Strong analytical and problem-solving skills with a collaborative, proactive mindset.

Bonus skills:

• Familiarity with Kubernetes, AWS, or microservices architectures.
• Experience in security-conscious or compliance-heavy environments (e.g., FinTech, Identity, KYC).
• Knowledge of message brokers (Kafka, RabbitMQ) or event-driven systems.

Perks & Benefits

• Health & Wellbeing: Use your full access to the mental health platform nilo, including 1on1 sessions.
• We value personal and professional development: make full use of Udemy, our training platform with 24/7 access and unlimited content/course consumption incl. certification.
• We make your remote work comfy: we provide support on equipment and offer flexible working hours.
• We value collaboration & love to come together: regular onsite gatherings, internal initiatives and summer parties to connect outside of work.
• May your family require your attention or other reasons apply: use the benefit of our paid special leave days.
• Enjoy the possibility to combine work with a longer stay at your holiday destination or extend a weekend with our Workcation possibilities.
• In addition to the perks & benefits above, we offer specific benefits that differ between our locations.

the company applies the principles of non-discrimination and equality: We strive to establish, maintain, and promote an open and inclusive recruitment process and working environment by respecting the principles of equal opportunities. Including but not limited to: sex, race or ethnic origin, religion or convictions, gender identity, citizenship, marital status, disability, age, or sexual orientation.