A small piece of paper with numbers that have the power to change a life forever! Okay... let's replace the paper with an app and one person with 500,000+ monthly users. This is our business!

📌 Your Mission

Power Next Lotto's Backend Revolution

As Senior Backend Developer (m/f/d), you'll champion the evolution of our core backend—crafting seamless, delightful experiences that wow customers. Partner with your team to revolutionize registration flows, ignite gamification, and streamline payments across customer and backoffice worlds. As our user base surges, lead the charge in scaling our systems: deploy cutting-edge monitoring, hunt down performance hurdles, and safeguard unshakeable health for unstoppable growth.

🎯 Your Tasks & Responsibilities

• Develop robust REST interfaces to power our core applications.
• Build efficient message-driven data pipelines for seamless operations.
• Create backend processes for our lottery game brokerage, including:
• User verification workflows.
• Multi-method payment processing.
• Ticket submissions to state lottery companies.
• Automation of backoffice tasks, like accounting and SEPA payment handling.
• Analyze and resolve performance bottlenecks to ensure optimal system speed.
• Actively participate in code reviews, sprint planning, and agile ceremonies for top-tier delivery.
• Implement security best practices to safeguard data and systems.
• Contribute to key architectural decisions shaping our backend infrastructure.

💻 Our Tech Stack & Working Environment

• Kotlin on Java 21
• Classic Spring Boot stack in a modular application
• MySQL for persistence
• Google PubSub as messaging bus
• Gitlab for source control and CI/CD
• Google AppEngine & CloudRun as runtime environment
• MacOS, Docker and IntelliJ for local development

🚀 Your Key Competencies

• Core Tech Stack: Deep expertise in Java or Kotlin with Spring Boot, MySQL, REST APIs, and OAuth for building robust applications.
• Cloud Scalability: Proven ability to design, deploy, and optimize scalable, high-performance cloud applications.
• Structured Independence: Work methodically and autonomously, delivering consistently in dynamic environments.
• GCP Experience (Bonus): Hands-on experience running applications on Google Cloud Platform.
• Advanced Architectures (Bonus): Familiarity with message-driven or hexagonal architectures to enhance system resilience.

💡Your Soft Skills

• Ownership & Autonomy: Take full ownership of your work and thrive independently to drive results.
• Clear Communication: Articulate ideas effectively and collaborate seamlessly with teammates and stakeholders.
• Prioritization Mastery: Excel at prioritizing tasks to keep projects on track amid fast-paced demands.
• Proactive Problem-Solving: Anticipate challenges early, raise issues promptly, and contribute solutions to the team.
• Strategic Big-Picture Thinking: Maintain a clear view of the broader goals while executing details flawlessly.
• Continuous Improvement: Constantly seek ways to optimize workflows and elevate team efficiency.

🏆 Your Impact in This Role

• Serve as a core contributor to our backend team, driving key initiatives forward.
• Independently implement user stories from concept to deployment.
• Review and refine merge requests from teammates to uphold code quality.
• Leverage advanced knowledge of our business model and backend processes for smarter solutions.
• Deliver valuable insights during story refinement, retrospectives, and architecture discussions.

🎓 Your Background – Education & Experience

• At least 3 years of experience in backend development using Kotlin or Java.
• Bonus points for experience with e-commerce, payment or accounting processes

🎁 What we offer you:

Remuneration & work-life balance:

• Competitive salary and trust-based working hours.
• Private health insurance.
• Generous training budget.
• 2 extraordinary team events (4 days) per year.
• Meal benefit.

Communication & trust:

• Open, honest and direct communication. Your ideas are welcome!
• A feedback meeting every quarter to help us grow together.
• We encourage innovation and are open to new ideas that push the boundaries.

Modern working:

• Everything you need for your daily work: MacBook, monitor, headphones and more.

Individual training:

• One training day per month and a generous training budget for your personal development.

Buddy program:

• An experienced team member will support you from day one to help you get started.

The team

• We are a colorful bunch from different nations and backgrounds. We don't distinguish by religion, gender, age, marital status... For us, the focus is on what you can do!

🪴Our values:‍

MAKE IT HAPPEN 💪🏼

• Drive results - Own the problem, the goal, and the outcome through self-organization and decisions backed by data
• Speak up with courage - Challenge ideas and raise issues directly when it matters
• Getting things done - Be pragmatic, keep momentum, and bring the energy
• Deliver quality impact - Ship solutions that move our mission and strategic goals forward

WIN TOGETHER 💚

• Communicate openly and respectfully - Be transparent, assume positive intent, and set aside own ego when interacting with others
• Help others win - Proactively share knowledge, time, and strengths in an interdisciplinary set-up
• Work across cultures - Learn from others’ perspectives and actively refine own style for trust-based collaboration in a diverse team
• Bring team spirit - Create moments of joy and belonging that fuel big outcomes together

SHAPE THE FUTURE  🚀

• Experiment to learn - Run tests, measure outcomes, treat mistakes as an invitation to learn and adapt insights into action
• Spot opportunities - Stay close to customers and market trends to identify what’s next
• Build user-first innovation - Deliver trustworthy, data-driven solutions and services that set the bar
• Grow yourself - Challenge and reflect on the way you work, seek feedback, and keep developing your skills

👉 Sound like you? 📩 https://nextlottogmbh.teamtailor.com/