Software Engineer, Senior (C#/.NET)

One10

2d•Remote

About The Position

We are currently hiring a Software Engineer for our Digital Team. Senior Software Engineer applies deep technical expertise to design, build, integrate, and evolve modern, scalable solutions. This role collaborates closely with Architects, Product Managers, Product Owners, QA, DevOps, and Client‑facing teams to deliver secure, high‑quality systems. In addition to strong full‑stack engineering skills, this role embraces AI‑assisted development, modern cloud‑native patterns, and continuous improvement of engineering practices. Must be able to work U.S. EST / CT core business hours consistently and must be authorized to work in the United States. No visa sponsorship available for this role (including F-1, OPT, CPT, H-1B, or other visa sponsorship).

Requirements

Bachelor’s degree in Computer Science, Information Systems, or related field (or equivalent experience)
5–8+ years of professional software development experience
C# / .NET 6–8 (ASP.NET Core, Minimal APIs, Web APIs)
RESTful API design and versioning
Entity Framework Core, LINQ
Background services, async/await, multithreading
HTML5, CSS3, modern responsive design
JavaScript / TypeScript
Experience with React (preferred) or Angular
Modern UI frameworks (Bootstrap, Tailwind, Material UI, etc.)
Microsoft SQL Server 2019–2022
Schema design, stored procedures, functions, and views
Query optimization and performance tuning
Experience with ORMs and raw SQL where appropriate
Exposure to NoSQL (Cosmos DB, MongoDB, or similar) is a plus
Azure (preferred) or AWS experience
CI/CD pipelines (Azure DevOps or GitHub Actions)
Git‑based source control and branching strategies
Containerization basics (Docker) a plus
Telerik UI for ASP.NET / Kendo UI (preferred)
ETL and data integration tools (SSIS or equivalent)
API‑based integrations and event‑driven patterns
Hands‑on experience using AI‑assisted development tools (e.g., GitHub Copilot, ChatGPT, or similar)
Ability to use AI for code generation and refactoring, unit test creation, documentation and technical analysis, debugging and performance investigation
Understanding of AI/ML concepts (LLMs, embeddings, prompt engineering) at a practical level
Experience integrating or consuming AI‑powered APIs (OpenAI, Azure OpenAI, or similar) is a strong plus
Strong judgment around security, data privacy, and responsible AI usage
Extremely strong analytical, debugging, and problem‑solving skills
Excellent written and verbal communication
Ability to work independently and manage multiple priorities
Experience working in an Agile/Scrum environment
Comfortable collaboration across technical and non‑technical teams
Demonstrates ownership, accountability, and continuous learning mindset

Responsibilities

Design, develop, and maintain scalable, secure, and high‑performance applications
Analyze business and technical requirements and recommend optimal solutions
Lead complex integration efforts with internal systems, third‑party platforms, and APIs
Apply object‑oriented design principles, SOLID patterns, and modern architectural practices
Serve as the primary technical lead for features and integrations
Collaborate with Architecture and DevOps teams to align with standards and best practices
Provide accurate estimates, technical guidance, and risk assessments for projects
Mentor and coach engineers; perform code reviews and promote engineering excellence
Ensure systems are well‑documented, testable, and maintainable
Participate in Agile ceremonies and contribute to continuous delivery pipelines
Leverage AI tools to improve developer productivity, code quality, and system insights
Interface with Infrastructure & Operations to understand networking, security, and deployment considerations
Perform other duties as assigned; limited travel may be required