LEAD SOFTWARE ENGINEER (M/F/D) KOTLIN

interim Group; Jena; Remote; Vertraulich; Vollzeit

Zusammenfassung

A forward-thinking organization is seeking a Lead Software Engineer focused on Kotlin to enhance digital identity solutions in the EUDI Wallet Ecosystem project. This role involves technical leadership, backend architecture design, and mentoring an agile development team, contributing to Germany's crucial digital public infrastructure.

Leistungen

Flexible working hours

Access to conferences and team events

Supportive work culture

Qualifikationen

• At least a decade of professional experience in back-end development.
• 3+ years in technical leadership with Kotlin.
• Fluent in English; German language skills are a plus.

Aufgaben

• Take technical ownership of Kotlin-based backend services.
• Lead and mentor a cross-functional team.
• Ensure clean, well-tested code and continuous integration.

Kenntnisse

Kotlin

Backend Development

Agile Mindset

Cryptography

DevOps

Tools

Spring Framework

CI/CD Pipelines

Jobbeschreibung

We are looking for people who want to shape the future with us. As part of SPRIND, an organization that is called the Federal Agency for Breakthrough Innovations but thinks like a start-up. Our goal is to create new breakthrough innovations from Germany. That means products, services and systems that make all of our lives noticeably and sustainably better. To do this, we connect new thinkers from science and business, people with outstanding ideas, special expertise and passion.

In the EUDI Wallet Ecosystem project, which SPRIND is carrying out on behalf of the newly formed Federal Ministry of the Digitalization and State Modernization (BMDS), a concept for a German implementation of the EU eIDAS 2.0 regulation including a digital wallet is being developed and tested. Representatives of organized civil society, business associations and administration as well as experts from science are involved in a public consultation process that accompanies the project. Mid-term this project will be transformed into a to-be-founded government-owned entity that takes over the EUDI Ecosystem for the permanent further development and operation of the platform.

Tasks

As a Lead Software Engineer with a focus on Kotlin, you will take technical ownership of an agile development team and shaping the future of secure digital identity in Europe. You’ll play a key role in designing and building the backend architecture of a high-trust digital wallet solution used across regulated, privacy-sensitive domains.

Your Responsibilities

• Take technical ownership of the development and evolution of the Kotlin-based wallet’s backend services, including:

• Remote trust anchor (Cloud HSM) integration

• Wallet and credential lifecycle

• Vulnerability management

• System telemetry and statistics

• Lead and mentor a cross functional team incl. front-end-, back-end-, QA-, UX/UI-, system-engineers

• Ensure clean, well-tested code and continuous integration

• Make architectural and technology decisions in coordination with our product owner

• Support the recruitment and onboarding of technical talent

Requirements

• At least a decade of professional experience in back-end development incl. 3+ years with Kotlin and in a technical leadership role as well
• Strong proficiency in Kotlin and solid understanding of modern backend architecture (e.g., microservices, REST, event-driven design)
• Experience with Spring framework (with Kotlin)
• Deep knowledge of modern cryptography, secure protocol implementation, and identity management standards
• Knowledge of Hardware Security Modules and cryptographic key management is a plus
• Hands-on experience with DevOps, CI/CD pipelines, and cloud-native operations
• Agile mindset (Scrum/Kanban), strong communication skills, and a collaborative spirit
• Fluent in English; German language skills are a plus

Benefits

• A chance to shape one of Germany’s most important digital public infrastructures
• A forward-thinking, mission-driven work culture at the intersection of science, administration, and innovation
• Attractive compensation based on the responsibility of the position
• Flexible working hours and remote work options
• Access to conferences, team events and a supportive work culture
• The attractive remuneration is based on the responsibility of the position.
• Location: remote (occasional travel to other locations within Germany)
• Working Hours: Full-time
• Contract: Initially limited until December 2026 (The plan is to continue the contracts thereafter.)
• Start Date: As soon as possible

We look forward to receiving your application.