Senior .NET Backend Engineer - Fintech (Remote)

Dating Group; Polska; Remote; PLN 180,000 - 290,000; Full time

Benefits offered by this job

Remote work

27 paid vacation days

Paid sick leave

Referral bonuses

Learning support (Preply/Coursera)

Wellbeing Wallet up to €2,800/year

Home office budget €1,000

Family support up to €1,000 gross

Long-term recognition bonus after 3+1?

Job summary

Social Discovery Group (SDG) is seeking a Senior .NET Developer (Fintech) to lead backend services for payments and back-office workflows. You will design microservices, implement resilient data pipelines, and ensure latency targets while collaborating with an international remote team.

The role demands 5+ years of C#/.NET Core experience, strong microservices know-how, and hands-on Azure, Docker, AKS, MS SQL Server, MongoDB/Cosmos DB.

Qualifications

• 5+ years of commercial experience with C# and ASP.NET Core.
• Experience designing microservices.
• Hands-on experience with Azure, Docker, AKS, MS SQL Server, MongoDB and Cosmos DB.
• Experience delivering tasks with AI tools or agents from definition to working result.
• Clean, maintainable code with tests.
• Ownership of results and open communication when something goes wrong.

Responsibilities

• Develop and maintain backend services for payment processing and the back office: reconciliation, payouts, fee calculation, settlements and the B2B client dashboard.
• Build resilient integrations and asynchronous workflows (idempotency, outbox/inbox, sagas, retries, deduplication).
• Meet performance and reliability targets (p95/p99 latency, SLA/SLO), set up monitoring and alerting.
• Deliver tasks with AI agents, validate the generated code, add tests and fix defects.
• Review code, keep specifications up to date and share knowledge with the team.

Skills

C# and ASP.NET Core

Microservices design

AI tooling / agents

Clean code with tests

Ownership & communication

Azure

Docker

AKS

MS SQL Server

MongoDB / Cosmos DB

Tools

Azure

Docker

AKS

MS SQL Server

MongoDB

Cosmos DB

Job description

Social Discovery Group (SDG) is seeking a Senior .NET Developer (Fintech) to lead backend services for payments and back-office workflows. You will design microservices, implement resilient data pipelines, and ensure latency targets while collaborating with an international remote team.

The role demands 5+ years of C#/.NET Core experience, strong microservices know-how, and hands-on Azure, Docker, AKS, MS SQL Server, MongoDB/Cosmos DB.