Senior Full Stack Software Developer Jobs in Connecticut

RCN Capital is a nationwide wholesale lender focused on helping real estate investors and independent mortgage brokers finance non-owner-occupied residential investment properties. We support a range of strategies including ground-up construction, fix-and-flip projects, and long-term rental financing through a streamlined process, dedicated teams, and a commitment to exceptional service.

We are seeking a Senior Full Stack Engineer to lead the design and development of next-generation financial and partner-facing platforms, including the Loan Origination System (LOS), Partner Ecosystem, and Sales Portal. This role is responsible for end-to-end delivery of modern, cloud-native applications using.NET 10, React, and TypeScript, with a strong emphasis on scalable architecture and high-quality engineering standards.

The ideal candidate brings a builder mindset for net-new development, combined with an innovation mindset to integrate AI-powered capabilities and agentic workflows into core business processes. This role will act as a technical leader within the Project Nexus ecosystem and serve as a bridge between onshore leadership and offshore delivery teams.

Primary Responsibilities:

• Lead architecture and hands-on development of modern web applications supporting LOS, Partner Portals, and Sales Platforms
• Design, build, and maintain React and TypeScript front-end applications using modern patterns and state management
• Develop high-performance backend services and APIs using C# and.NET 10 /.NET Core
• Design and implement AI-powered features, including intelligent agents and automated document processing using Azure OpenAI Services
• Collaborate closely with offshore development teams, performing code reviews and providing architectural and technical guidance
• Design and implement cloud-native architectures leveraging Azure services such as Functions, App Services, Service Bus, and serverless components
• Ensure secure-by-design coding practices, including authentication, authorization, and secrets management
• Support production systems and participate in design reviews, technical planning, and platform evolution initiatives

Required Skills:

Frontend:

• Expert-level React (Hooks, Context API) and TypeScript.
• Experience with modern state management (Redux/Zustand) and Tailwind CSS

Backend:

• Deep proficiency in C# and .NET 10/Core.
• Experience with Entity Framework Core and high-performance API design.

AI/GenAI:

• Proven experience with LLMs (4th generation or newer), Prompt Engineering, and building RAG applications.
• Familiarity with LangChain or Semantic Kernel is a plus.

Cloud:

• Strong experience with Azure (App Services, AI Search, Key Vault) and Azure DevOps/GitHub Actions for CI/CD.

Database:

• Advanced PostgreSQL skills, including schema design, performance tuning, and NoSQL (CosmosDB) experience.

Preferred Skills:

• Experience with AI / GenAI concepts, including LLMs, prompt engineering, or Retrieval-Augmented Generation (RAG) patterns
• Familiarity with Azure OpenAI Services, LangChain, Semantic Kernel, or similar frameworks
• Experience with containerization and orchestration (Docker, Kubernetes)
• Exposure to NoSQL databases such as Cosmos DB
• Understanding of secure coding practices and regulated data environments

Required Experience:

• 7+ years of professional software development experience
• At least 3 years operating in a Senior or Lead Engineer capacity
• Hands-on experience building and supporting production-grade, cloud-native applications
• Experience collaborating with distributed or offshore development teams

Preferred Experience:

• FinTech, lending, or financial services platform development
• Building or modernizing partner portals or external-facing systems
• Greenfield development of enterprise platforms
• Platforms that have evolved to incorporate AI-assisted workflows

Education:

• Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related field required
• Master's degree in Computer Science, Software Engineering, Information Systems, or related field preferred

Preferred Certifications:

• Microsoft Certified: Azure Developer Associate
• Microsoft Certified: Azure Fundamentals or Azure AI Fundamentals
• Other relevant cloud or software engineering certifications

Work Schedule:

• Full time
• Monday-Friday, 9:00AM to 6:00PM
• Hybrid work model with first 90 days onsite and 2 days/week in office after in either:
• South Windsor, CT
• Charlotte, NC

Why RCN Capital:

• Growth‑oriented environment with opportunities to expand your legal skill set
• Ongoing training and development
• Casual dress policy
• Free food and beverage program
• Competitive benefits, including 401(k)
• And many additional perks

Equal Opportunity Employer This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.