/ TEAMS · Senior .NET / C# Engineering
Find experienced .NET engineers who can own established C# codebases, business workflows, service integrations and the reliability of production enterprise software.
2,000+ engineers in our active talent network · Regional recruiters
/ SYSTEM STACK
C# · ASP.NET Core · APIs
EF Core · SQL · Transactions
Messaging · REST · Events
Azure · Containers · CI/CD
Telemetry · Security · Upgrades
/ AVAILABLE TO HIRE
Profiles show the experience we can source. Individual candidate availability is confirmed after enquiry.
Senior .NET / C# Engineer — ASP.NET Core
Available7+ years of experience · Croatia
Senior .NET / C# Engineer — ASP.NET Core with 7 years in production systems, focused on Senior .NET / C# Engineer — ASP.NET Core and Production systems.
Languages: Croatian, English B2+
Senior .NET / C# Engineer — ASP.NET Core
Inquire availability10+ years of experience · Croatia
Senior .NET / C# Engineer — ASP.NET Core with 10 years in production systems, focused on Production systems and Technical delivery.
Languages: Croatian, English B2+
Mid+ Senior .NET / C# Engineer — ASP.NET Core
Inquire availability5+ years of experience · Croatia
Senior .NET / C# Engineer — ASP.NET Core with 5 years in production systems, focused on Technical delivery and Senior .NET / C# Engineer — ASP.NET Core.
Languages: Croatian, English B2+
Senior .NET / C# Engineer — ASP.NET Core
Available8+ years of experience · Poland
Senior .NET / C# Engineer — ASP.NET Core with 8 years in production systems, focused on Senior .NET / C# Engineer — ASP.NET Core and Production systems.
Languages: Polish, English B2+
/ Engineering teams
Onectus supports engineering teams and long-lived product platforms, including enterprise integrations and systems with operational requirements. For .NET searches we evaluate C#/ASP.NET Core experience against the client's architecture, business processes and production responsibilities instead of claiming unverified .NET customer work.
/ Technical specializations
Target senior engineers who understand asynchronous execution, data access, identity, distributed workflows and maintainable enterprise modernization.
Minimal APIs/controllers, middleware, dependency injection, domain boundaries and versioned contracts.
EF Core mapping, LINQ translation, migrations, query plans, transactions and concurrency.
REST, partner APIs, messaging, background workers, retries and idempotent business events.
App Service, Azure Functions or containers, identity, configuration, networking and CI/CD.
OAuth2/OIDC, ASP.NET authorization, tenant isolation, audit trails and secrets handling.
OpenTelemetry, structured logging, profiling, async/await behavior, tests and runtime upgrades.
/ Project scenarios
Upgrade .NET runtimes, untangle modules and preserve legacy integration contracts.
Diagnose EF Core, SQL queries, thread-pool pressure and dependency latency.
Handle outbox/event delivery, retries, access control and operational monitoring.
Coordinate identity, observability, deployment and secure cross-system communications.
/ Practical evaluation
We evaluate personally owned system changes, incident investigations and pragmatic production decisions rather than focusing on framework syntax alone.
Can they explain middleware ordering, dependency lifetimes and service boundaries?
How did they address EF Core queries, transactions, concurrency and schema migrations?
How were cancellation, background processing, retries and idempotency managed?
What role did they play in upgrades, testing, Azure operations, monitoring and reviews?
/ Sourcing process
Runtime and ASP.NET versions, EF/database, Azure/on-prem hosting, APIs and team ownership.
Source verified .NET developers across the active engineer network and regional recruiters.
Assess integration reliability, SQL/EF behavior, security, operations and migration decisions.
Align seniority, timezones, interviews, availability and release expectations.
Profiles, availability and engagement terms are confirmed for each request.
/ Questions
Yes. Define runtime versions, APIs, database operations and the exact EF Core or SQL ownership expected.
Yes, when cloud configuration, identity, networking, monitoring or deployment is part of the role.
Yes. Include existing .NET Framework/Core versions, interoperability needs, testing and target transition scope.
We focus on production ownership: APIs, data correctness, integrations, security, observability and managed upgrades.
/ Onectus · TEAMS
Tell us the technology, production responsibilities, experience level and working model. We'll activate the appropriate engineering sourcing channels.
