Senior Fullstack Engineer, Replay

TBC Corporation

12d

About The Position

Lyric is an AI-first, platform-based healthcare technology company, committed to simplifying the business of care by preventing inaccurate payments and reducing overall waste in the healthcare ecosystem, enabling more efficient use of resources to reduce the cost of care for payers, providers, and patients. Lyric, formerly ClaimsXten, is a market leader with 35 years of pre-pay editing expertise, dedicated teams, and top technology. Lyric is proud to be recognized as 2025 Best in KLAS for Pre-Payment Accuracy and Integrity and is HI-TRUST and SOC2 certified, and a recipient of the 2025 CandE Award for Candidate Experience. Interested in shaping the future of healthcare with AI? Explore opportunities at lyric.ai/careers and drive innovation with #YouToThePowerOfAI. Applicants must already be legally authorized to work in the U.S. Visa sponsorship/sponsorship assumption and other immigration support are not available for this position. We're not a startup, but we move like one when it matters. Right now, we're starting on a large modernization of our payment integrity platform: ripping out legacy .NET, rebuilding around clean APIs, fixing data bottlenecks, and getting the product ready for scale. If you thrive in fast-paced environments, care deeply about clean architecture and DX, and enjoy solving complex UI/UX and distributed systems challenges, this role is for you. Here's what makes this role different: you're not just a .NET engineer who "also knows AI." We want someone who has already figured out that tools like Cursor, Claude Code, and Codex aren't toys - they're force multipliers. You'll use AI agents every day to tear through migrations, refactors, and test coverage that would take a traditional team weeks. But you also know when the AI is wrong, when to step in, and how to keep quality high. Think of it as having a junior engineer with infinite energy and zero judgment - your job is to supply the judgment.

Requirements

5+ years building and shipping production systems. Not side projects - real software with real users solving skills; able to work independently and collaboratively in fastmoving teams
Some C# and modern .NET experience (Core and beyond). Especially in large codebases and you've done meaningful refactoring and migration work, not just greenfield.
Strong SQL Server chops - schema design, query tuning, performance troubleshooting. You've worked on data-heavy applications where the database wasn't an afterthought.
Cloud experience with Azure and/or AWS. Azure is particularly relevant here.
API design experience - you've built and maintained service-oriented architectures with real versioning, auth, reliability, and testing practices.
You actually use AI coding tools as a daily driver. Cursor, Claude Code, Codex, or similar - and not just for autocomplete. You've used agents for multi-file refactors, migrations, test generation, and review workflows. You have opinions about what works and what doesn't.
You communicate clearly. Good PR descriptions, straightforward design docs, pragmatic collaboration, low ego. We don't need a rockstar - we need someone the team trusts.

Nice To Haves

You've actually done a legacy ASP.NET / .NET Framework modernization before. You know where the bodies are buried and you have the scars to prove it. Bonus points for Azure modernization patterns.
Experience with distributed systems tooling - Kafka, event-driven architectures, or working with Postgres alongside SQL Server.
Front-end experience with Angular and/or React/Next.js.
You've helped establish agent-friendly engineering practices: writing repo instructions that AI tools can follow, breaking work into agent-sized tasks, setting up CI guardrails for AI-generated code, feature flags, canary deployments - any part of the progressive delivery toolkit.
Background in regulated domains (healthcare, fintech, payments) where "move fast and break things" will get you fired.