Senior .NET Backend Developer (m/f/d)
Onventis
Posted: October 27, 2025
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Job Description
Let’s Start with our Story:
Every great career begins somewhere, and this one starts here. We are a team that believes in
big ideas, bold moves and the people behind them. This is where you could be part of
something exciting!
Onventis has been a cloud pioneer for digital transformation of purchasing and finance
processes since 2000. The cloud-based software Onventis Buyer is an all-in-one procurement
system that helps companies to manage their business spend in order to achieve financial
control, efficiency, compliance and cost savings.
Why This Role Matters:
In this role, you will directly shape the functionality, performance, and scalability of our
products, by creating cloud native, scalable and high performing products of enterprise level.
From day one, you will build applications and services, which stand alone for it's value and quality on the procurement market.
Your Role at a Glance:
As our .NET Backend Developer, you will be responsible for building and maintaining cloud native micro-services architecture as well as refactoring and maintaining our existing solutions and slicing bigger services into smaller chunks.
How you will work:
• actively participate in development meetings to learn new, understand company horizons and goals
• contribute in technical planning meetings by discussing user stories with the colleagues and decomposing tasks; begin with the end result in mind
• ensure high quality of the delivered products (documentation, code reviews, unit tests, API tests, monitoring, tracing and alerting)
• collaborate closely with the product manager to ensure the team understands the purpose clearly
• escalate when the help is needed to the Director of Products
• align with the team during daily stand up meetings
• speak out for improvement suggestions during retrospective meetings which work
Your Experience and Skills:
We are looking for someone who brings:
Must-have's:• C# (.NET Core & .NET Framework)
• Clean code, microservices architecture, DDD
• CI/CD process understanding
• MS SQL, Redis, MongoDB
• Docker, k8s
• RabbitMQ; MassTransit
• Microsoft Azure Cloud
• Azure DevOps
• REST APIs
• Integration and Unit tests skills
• Git
Nice-to-have's:• Elastic & Kibana
• Prometheus & Grafana
• Helm charts
• CQRS/CQS; Event Sourcing
But more importantly, we are looking for someone who is curious, detail-oriented, and
passionate about writing clean, maintainable code!
Our Commitment to You:
Our CORE values bring our varied cultural background and products together and more
importantly, ensure how we invest in our people. At Onventis, you can expect a performance
focused culture where your achievements are recognized, your goals are prioritized and your
career accelerates.
We offer more than just a job: join the Onventis cloud platform for buyers and suppliers! Our
solutions are used by 1.2 million registered users in 21 languages worldwide. We live
innovation, support each other, grow together and we show it with real benefits:
• Flexibility: Hybrid work model with modern tools and equipment
• Mobility: Free parking, Job Ticket, JobRad leasing
• Health & Wellbeing: Urban Sports membership, fresh fruit, drinks, and meal subsidies
• Career Growth: Structured on-boarding, training programs, leadership & language courses
• Culture: Friendly team spirit, clear structures, regular team events & gatherings
• Rewards: Attractive salary package, pension plan plus discounts, referral rewards & sabbatical opportunities
• Global Collaboration - Work where it works for you: turn your travels into opportunities to meet, create, and connect at any of our centrally located EU hubs. Travel and stay are self-organized!
Curious about our departments, recruitment steps, or common questions?
Everything you need is on our career’s website.