Principal Software Engineer

Principal Software Engineer

Banyan Software provides the best permanent home for successful enterprise software companies, their employees, and customers. We are on a mission to acquire, build and grow great enterprise software businesses all over the world that have dominant positions in niche vertical markets. In recent years, Banyan was named the #1 fastest-growing private software company in the US on the Inc. 5000 and amongst the top 10 fastest-growing companies by the Deloitte Technology Fast 500. Founded in 2016 with a permanent capital base setup to preserve the legacy of founders, Banyan focuses on a buy and hold for life strategy for growing software companies that serve specialized vertical markets.

About the Role

We are seeking an exceptional engineer that is ready to change how software is built, thrives in fast-moving environments and is eager to take full ownership of complex projects. This role is not just about writing code—it's about thinking like a founder, architecting scalable systems, and applying AI-native development practices to accelerate delivery.

The ideal candidate is comfortable working across the stack (microservices, backends, frontends), and is energized by the potential of AI to change the way we transform legacy systems into modern, service-based architectures. You'll operate with a high degree of autonomy in a small team of like-minded "intrapreneurs" collaborating with subject matter experts and business stakeholders.

Key Responsibilities

• End-to-End Development: Design, build, and deliver production-ready microservices, APIs, backends, and frontends.
• AI-Accelerated Engineering: Use tools like GitHub Copilot, Claude Code, Cursor AI, and ChatGPT to scaffold, test, and document code at speed.
• System Transformation: Lead rewrite efforts from legacy applications to modern architectures, applying iterative strategies such as the strangler pattern to drive AI-centric enterprise-grade code construction.
• Technical Ownership: Operate with a "whole system" mindset, from architecture to deployment, ensuring technical decisions align with business needs.
• Collaboration: Partner with SMEs and domain developers to validate functionality and support knowledge transfer.

Required Experience

• 10+ years of professional software development.
• 5+ years with modern .NET (C#, ASP.NET Core).
• 3+ years with modern frontend frameworks (React with TypeScript or Angular).
• Experience with end-to-end rewrites or greenfield application builds.
• Familiarity with legacy migration (desktop to web, undocumented systems) is a plus.
• Skilled at translating legacy procedural logic into modern services.
• Proficient in automated test generation, OpenAPI (Swagger), and integration of LLM-powered features (e.g., natural language search).

Agentic AI Expertise

• Hands-on experience using AI tools as coding partners.
• Ability to orchestrate multi-agent workflows for software development.
• Experience applying AI to reverse engineering, summarization, and UI prototyping.

What We're Looking For

• Full Stack as a Mindset: You see the big picture, but you're equally comfortable in the details.
• AI-Native Thinking: You treat AI tools as co-developers, using them to move faster and smarter.
• Innovative: You are not deterred by roadblocks, you see them as an opportunity to blaze a trail into uncharted territory.
• Autonomous & Entrepreneurial: You thrive in ambiguity, make informed trade-offs, and deliver without heavy oversight.
• Business-Oriented: You understand that technology serves business outcomes and align technical solutions with real user needs.
• Collaborative & Transparent: You share reasoning, communicate trade-offs, and document clearly for long-term sustainability.

Why This Role?

This is an opportunity to join a world wide company at a transformative stage. You'll work with an elite group of technologists and create real business impact. If you've ever wanted to think like a CTO while building like a swarm of engineers, this is the role for you.