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# Senior .NET Developer

- **Company:** Phoenix Vanguard, Inc.
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), Apache HTTP Server, C Sharp (Programming Language), Code Generation, Databases, Memory Management, Protocol Buffers, Python (Programming Language), Service Layer
- **Published:** November 12, 2026
- **Apply:** https://arc.dev/remote-jobs/j/redirect/pyvvgxc7an

## About the Role

* 6+ years of C# and modern .NET (6 or later).
 * Production experience with gRPC in .NET (Grpc.Net.Client, protobuf code generation, streaming calls).
 * Hands-on use of Apache Arrow in .NET (Apache.Arrow package) or another columnar data format.
 * Strong handling of high-volume data: memory allocation, Span/Memory, streaming, async.
 * Care with timestamp precision, time zones and numeric types.

 1. Nice to have:

 * Arrow Flight in any language.
 * kdb+ C# client experience (csharpkdb, qSharp) or basic q.
 * Prior work wrapping a market data or tick database API (OneTick, kdb+, Bloomberg, Refinitiv).

 1. QUALIFICATION STANDARDS
 1. Work Experience:

 * Market data work at a hedge fund, bank, broker or trading technology vendor.
 * Familiarity with trades, quotes, order books, symbology, corporate actions and exchange calendars.
 * Understanding of the difference between exchange, vendor and capture timestamps, and why it matters.
 * Any of: equities, options, futures, FX or fixed income data.

## Description

We are staffing developers to help a large hedge fund replace a commercial tick database (OneTick) with kdb+ for real-time market data and Apache Iceberg for end-of-day history. A Python service layer, exposed over gRPC and Arrow Flight, will sit in front of both stores. The fund's existing .NET wrapper stays as the client-facing interface and is re-backed by the new services.

The work runs in parallel with the current system: build the new stack, reconcile it against OneTick, then cut consumers over one at a time. This developer will own the .NET side of the migration, working alongside our architect and the client's engineering team.