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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on .NET Core, ASP.NET Core with emphasis on backend and RESTful API development. Required skills include C#, Entity Framework Core, working with SQL Server, PostgreSQL databases, testing frameworks xUnit, NUnit and TDD practices. Responsibilities cover documentation, performance tuning, and collaboration in Agile/Scrum teams. Offers include mentoring, flexible working hours, and remote work opportunities.
from: 25 August 2026
to: 24 September 2026
75 - 110 złnet (+ VAT)/ hr.B2B contract (full-time)
Requirements
Expected technologies
C#
.NET
.NET Core
ASP.NET Core (REST Web API / Minimal APIs)
Entity Framework Core
PostgreSQL lub MS SQL Server (T-SQL)
xUnit lub NUnit
Moq (lub NSubstitute)
FluentAssertions
Docker
GitHub
Postman (lub Swagger / OpenAPI)
LINQ
JSON / JWT
Optional technologies
Microsoft Azure
AWS
TypeScript
React (lub Angular / Vue.js)
Blazor
RabbitMQ (lub Apache Kafka / Azure Service Bus)
Redis
MongoDB (lub Azure Cosmos DB)
Dapper
MediatR (wzorce CQRS)
MassTransit
GitHub Actions
gRPC
GraphQL
Serilog
OpenTelemetry
Polly
Kubernetes
.NET Aspire
Operating system
Windows
Our requirements
- Strong proficiency in C# and the .NET ecosystem, including .NET Core.
- Experience building backend services and APIs using ASP.NET Core (RESTful APIs, Web API, middleware).
- Good understanding of object-oriented design, design patterns, SOLID principles and clean architecture.
- Experience with Entity Framework Core, LINQ, and database design (SQL Server, PostgreSQL) including writing optimized queries and migrations.
- Familiarity with unit testing, integration testing and test frameworks (xUnit, NUnit, MSTest, Moq) and TDD practices.
- Knowledge of asynchronous programming (async/await), multithreading and concurrency patterns.
- Experience with source control systems, primarily Git (branching strategies, pull requests, code reviews).
- Understanding of CI/CD pipelines and build tools (Azure DevOps, GitHub Actions, TeamCity, Jenkins) and deployment practices.
- Familiarity with containerization and orchestration technologies (Docker, Docker Compose, Kubernetes) is a plus.
- Experience with cloud platforms (Azure, AWS or GCP) and cloud services integration (App Services, Functions, Blob Storage, RDS/SQL, IAM).
- Knowledge of security best practices for web applications (authentication, authorization, OAuth2/OpenID Connect, data protection, OWASP).
- Experience with frontend integration (SPA frameworks like Angular, React, or Blazor) and working with API contracts.
- Ability to read and write technical documentation, create architecture diagrams and participate in design discussions.
- Strong debugging and performance tuning skills, profiling tools, memory and CPU diagnostics.
- Good communication skills, ability to work in Agile/Scrum teams, participate in sprint planning and estimations.
- Experience with messaging and event-driven architectures (RabbitMQ, Kafka, Azure Service Bus) and background processing (Hangfire, Azure Functions).
- Familiarity with logging and monitoring tools (Serilog, NLog, ELK stack, Application Insights, Prometheus/Grafana).
- Willingness to learn new technologies, adopt best practices and mentor junior developers.
- Bachelor’s degree in Computer Science or equivalent experience is preferred, along with 3+ years of professional .NET development experience (or as specified by employer).
Your responsibilities
We are looking for .NET Developers with a minimum of 4 years' experience.
We're on the lookout for talented professionals like you to join our vibrant team.
In this role, you'll become a valued part of our community, bringing your unique expertise to the table. We believe in collaboration and encourage you to actively contribute your skills.
Your voice matters here - propose innovative technical solutions and take ownership of your projects.
As a member of our team, you won't just be a cog in the wheel. We're committed to supporting your growth journey.
Join us if your expectations and experience match our requirements
This is how we organize our work
This is how we work
in houseat the client's siteyou focus on a single project at a timeyou develop several projects simultaneouslyyou can change the projectyou focus on product developmentyou focus on code maintenanceagilescrum
Team members
backend developerfullstack developer
This is how we work on a project
- Clean Code
- architect / technical leader support
We create open source
We're dedicated to open-source .NET, steadily building our solutions and libraries.
- Watch it on YouTube -> https://www.youtube.com/channel/UCVfa7ApE-qJvFMJrvaNZn2A/
- or visit GitHub -> https://github.com/Prognetics
What we offer
- Ability to define your development path
- Mentoring (with the use of practical tasks)
- An informal but productive work environment
Development opportunities we offer
- mentoring
- substantive support from technological leaders
- technical knowledge exchange within the company
- time for development of your ideas
Benefits
- remote work opportunities
- flexible working time
- integration events
- opportunity to obtain permits and licenses
Recruitment stages
- 1.About 30 minute HR interview
- 2.About 1h technical interview
- 3.Call with a customer (optional)
PROGNETICS SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
🦉 Join the #PROperTeam at Prognetics! 🚀
Are you passionate about .NET, modern JS (React/Angular), Azure, and Microsoft technologies? At Prognetics, we live and breathe reliable software solutions while sharing our collective tech expertise.
We're not just coders; we use our software development expertise to craft success stories for enterprise and corporate clients. Our approach? Pragmatic software development processes and a strong emphasis on teamwork.
At Prognetics, it's all about our collective growth. We're here to guide your development journey and support your certification aspirations. Be part of the #PROteam!
This is how we work
.NET Developer
75–110 zł / hr. (B2B)
I apply to:
PROGNETICS SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Warszawa, Wola
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