Use AI tools (Claude Code, GitHub Copilot, ChatGPT) to accelerate feature delivery across multiple workstreams while maintaining strong engineering rigor.
Build and maintain .NET 8 / C# REST APIs for CLO compliance, testing, and reporting.
Implement complex business logic for indenture compliance tests and financial rules.
Enhance domain models for CLO structures, positions, compliance tests, and results.
Extend dynamic rule execution frameworks (LINQ, expression trees, dynamic runtime).
Apply CQRS patterns for scalable command/query separation and high-performance I/O.
Platform Modernization & AI Enablement (15%)
Make the codebase “AI-ready” by upgrading legacy .NET components, removing obsolete libraries, and improving architecture boundaries without breaking production behavior.
Produce guiding documentation and examples for AI-assisted development (prompting patterns, review checklists, test scaffolding, safe refactor approaches).
Introduce/strengthen unit + integration test coverage to create safe feedback loops for AI-generated changes.
Build context systems that improve AI effectiveness (e.g., curated architecture notes, service maps, dependency graphs, domain vocabulary).
Testing & Quality (15%)
Write unit tests with NUnit and mocking frameworks (e.g., Rhino.Mocks) and expand integration coverage across APIs and data layers.
Participate in code reviews with a focus on validating AI-generated code for correctness, security, maintainability, and performance.
Troubleshoot production issues using logs/metrics (Serilog, health checks), debug root causes, and ship safe fixes with strong test coverage.
AI-first workflow mindset — confidently direct, review, and validate AI-generated code to ship features safely and fast
Strong .NET/C# fundamentals: SOLID, design patterns, DI, and testing discipline in real production environments
3+ years professional C#/.NET experience (modern .NET 6+; ideally .NET 8/10)
Experience building ASP.NET Core Web APIs and designing maintainable REST services
SQL Server skills (complex queries, joins, stored procedures; performance tuning)
Familiarity with DI/IoC patterns (Unity and/or built-in DI) and clean service registration
Experience with NUnit (or similar) and automated testing practices (unit + integration)
Git-based collaboration workflows and comfort working across a multi-service backend
Experience modernizing legacy systems (e.g., migrating .NET Framework to modern .NET, replacing obsolete libraries, incremental refactors with production stability)
Understanding of LLM integration patterns: tool use, agentic loops, embedding pipelines, prompt engineering, semantic search
“Embedding-driven” context assembly concepts (e.g., using metadata like stored procedures, property catalogs, sample queries to build context-relevant prompts)
Expression tree / Roslyn experience (strong plus)
Fintech / investment management / compliance platform experience (CLOs, structured credit, regulatory workflows)
Observability patterns (Serilog, health checks, monitoring), Docker/containerization exposure
Performance optimization for data-intensive financial systems
Must have current and ongoing authorization to work in the country of employment without the need for visa sponsorship, now or in the future.
What We Offer
At Siepe, we don’t just hire talent, we build performance-driven teams empowered by transparency, curiosity, and continuous growth. Our Total Rewards go beyond the basics: they’re designed to reward bold thinking, support personal development, and create space for meaningful connection whether you're growing your career, your skill set, or your impact.
Compensation & Financial Well-being:
- Competitive Compensation Packages, including Annual Performance-Based Bonuses
- 401(k) Retirement Plan with company match to support your long-term financial goals
- Employee Referral Program – earn rewards for helping us grow our talented team
Health & Insurance Benefits
- Comprehensive Health, Dental, Vision, and Life Insurance
- Flexible plans tailored to support individuals and families
Learning & Career Growth
- Annual investment in your Learning & Development goals
- On-the-job exposure to innovative technologies and financial strategies
- Growth opportunities in a collaborative, fast-paced environment that values continuous improvement
Time Off & Flexibility
- Flexible Time Off (FTO)
- Flexibility to recharge and maintain work-life balance
In-Office Perks & Culture
- Daily meal delivery allowance when working from the office
- Monthly Celebrations and Quarterly Offsite Events
- Annual Holiday Party to celebrate milestones and build team connection
- A vibrant, inclusive office culture that blends fun with purpose