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October 13, 2026
Lead Software Engineer (.NET + Azure)
Senior • On-site
Warsaw, Poland
Quick Facts
Lead Software Engineer (.NET + Azure) / Deputy Tech Lead. Drive the design and build of a greenfield enterprise integration platform on Microsoft Azure with technical ownership, hands-on delivery, and mentorship.
Description
You will lead the creation of a new Azure-based enterprise integration platform from scratch. The role blends implementation with technical leadership: you will architect contract-first integration patterns, set pipeline quality gates, mentor engineers, and support the Technical Lead across a complex multi-vendor ecosystem.
Responsibilities
- Work with the Integration Architect to build core platform components: contract repositories, API/event catalogues, APIOps pipelines, Azure API Management, Event Hubs, Service Bus, and managed file exchange.
- Build, test, and deploy integrations using C#/.NET and Infrastructure as Code (Bicep/Terraform), meeting performance, scalability, and security standards (OAuth2, HMAC, Key Vault).
- Serve as deputy to the Technical Lead: run technical discussions, make day-to-day decisions in their absence, perform constructive code reviews, and mentor integration engineers.
- Partner with the Data Platform team to define data contracts, operational boundaries, and zero-copy access to source data (Databricks / Microsoft Fabric / Purview).
- Enforce contract-first standards (OpenAPI, JSON Schema, Avro) and pipeline quality gates to keep external vendor teams aligned.
Requirements
- 8+ years of hands-on enterprise integration or backend engineering experience.
- Production experience with Azure API Management (policies, products, deployment as code), Azure Service Bus, Event Hubs, and serverless compute (Azure Functions / Logic Apps).
- Expertise in REST API design with OpenAPI and JSON Schema, and asynchronous messaging patterns.
- Strong cloud security knowledge: Entra ID, Key Vault, private endpoints, OAuth2, HMAC; plus Bicep/Terraform and Azure DevOps CI/CD pipelines.
- Proficiency in C# and .NET (or a comparable enterprise backend language).
- B2+ written and spoken English; ability to whiteboard and clearly present technical trade-offs to client architects and senior stakeholders.
Benefits
- Opportunity to work on bleeding-edge projects
- Competitive salary
- Flexible schedule
- Benefits package: medical insurance and sports
- Corporate social events
- Professional development opportunities
- Well-equipped office
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