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.NET Developer (Cosmos/SQL DB, REST APIs)
  • Warsaw
.NET Developer (Cosmos/SQL DB, REST APIs)
Warszawa, Warsaw, Masovian Voivodeship, Polska
Solvd Inc.
12. 12. 2025
Informacje o stanowisku

technologies-expected :


  • .NET
  • C#
  • ASP.NET Core MVC
  • OpenAPI
  • Swagger
  • Microsoft SQL Server
  • Cosmos DB

about-project :


  • Were looking for a skilled .NET Developer with deep experience in Cosmos and SQL databases, as well as a strong foundation in developing and deploying REST APIs. If you are a passionate team player, driven by technical excellence and a desire to collaborate across teams, we want you to join our dynamic environment.

responsibilities :


  • Work collaboratively in a cross-functional environment with product, tech, and QA teams to design and deliver robust software solutions.
  • Write clean, efficient, and high-quality code while actively participating in detailed code reviews and technical design sessions.
  • Communicate with clients, ensuring that complex technical concepts are conveyed clearly and professionally.
  • Prepare and present engaging product demos that showcase new features and enhancements.
  • Embrace a strong team-player mindset, contributing positively to a supportive and dynamic team culture.

requirements-expected :


  • 4–6+ years of professional experience in software development, focusing on technical design, code reviews, and coding.
  • Expertise with .NET 6/7/8 (server-side) and mastery of C# (versions 10/11/12).
  • Proficiency in developing with ASP.NET Core, including minimal APIs, controllers, middleware pipeline, filters, and dependency injection frameworks.
  • Demonstrated experience designing, developing, and deploying RESTful services (resource modeling, verbs, idempotency, pagination, filtering, sorting).
  • Knowledge of API Gateway/BFF patterns and implementation of CQRS where appropriate.
  • Skilled in working with OpenAPI/Swagger contracts, API versioning, backward compatibility, and deprecation policies.
  • Proficient in AuthN/AuthZ (OAuth2, OIDC, JWT token management, scopes, roles, claims transformation).
  • Experience with caching strategies, including in-process and Redis.
  • Hands-on experience with file handling for large uploads/downloads, streaming, and range requests.
  • Deep knowledge of relational databases, specifically SQL Server and/or Cosmos DB (experience with both is ideal).
  • Understanding of schema design concepts: normalization, pragmatic denormalization, partitioning, and sharding basics.
  • Familiarity with cloud services (App Service, AKS/ECS/EKS), Key Vault/Secrets Manager, Storage, Service Bus/Kafka, and monitoring via Application Insights or equivalent tools.

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