About Onwelo
Onwelo is a technology partner delivering comprehensive services — from strategy and architecture, through implementation, to maintenance — in the areas of digital transformation, data and automation. The team is over 400 specialists with strong senior-level competencies and 300+ completed projects for large organizations in Poland, Europe and the USA. Onwelo operates from several Polish cities as well as offices in Germany, Switzerland and the USA, combining local presence with global reach.
About the project
At Onwelo we continuously grow our engineering teams and dynamically respond to our partners' demand. We are looking for .NET developers who will strengthen our projects wherever competency gaps currently appear or new stages of work are starting.
By going through one recruitment process with us, your skills are mapped against the current needs of different teams. We deliver projects for clients from industries such as automotive, healthcare, finance and media & digital marketing, and also develop our own products. After technical verification, we match your profile to projects where your experience will bring the most value and respond to the client's real business challenges.
Your tasks
•Designing, implementing and developing backend applications in .NET (C#) technology
•Creating and maintaining microservices and APIs (REST, gRPC) and integrating them with external systems
•Working with databases, taking care of query optimization and schema migrations
•Implementing cloud solutions and using containerization (Docker, Kubernetes)
•Caring about code quality through regular participation in code reviews, writing tests (unit, integration) and collaborating on CI/CD automation
•Diagnosing and resolving production issues and participating in monitoring and application maintenance
Who we are looking for
•Minimum 4 years of experience in commercial software development in .NET (C#)
•Good knowledge of microservices architecture and design patterns used in web applications
•Ability to efficiently use Docker and Kubernetes tools
•Practical knowledge of cloud solutions
•Knowledge of English at minimum B2 level – mandatory condition
•Knowledge of tools for creating/managing APIs and testing services (e.g. Postman)
•Ability to write unit and integration tests
•Nice to have: openness to working with Angular or React
•Nice to have: experience in banking projects
What we offer
•Possibility of hybrid work (3 days from the client's office in Warsaw)
•Participation in interesting projects for global clients
•As much as 80% of promotions in our company happen internally
•90% of management staff has a technical education
•Access to internal training and development paths
•Participation in team events, company meetings and Town Halls
•Access to life insurance and private medical care for yourself and your family
•MultiSport card supporting health and fitness
