Software Engineer, Senior (C#/.NET)

About Us

At One10, we are more than just a workplace; we are a community of individuals who share a common belief – the belief in better products and, equally important, the belief in a better you.

Believe in Better Solutions: We take pride in the work we do because we believe in the transformative powers of innovation and recognition. Our commitment to excellence drives us to create solutions that go beyond the ordinary, solutions that have a positive impact on the lives of our customers and clients. Joining One10 means contributing to a culture of continuous improvement, where each day is an opportunity to push boundaries, challenge the status quo, and redefine what's possible. We believe in crafting solutions that make a difference and in setting new standards for quality and ingenuity.

Believe in a Better You: At One10, we recognize that our greatest asset is our people. We are committed to fostering an environment that empowers you to thrive both personally and professionally. We believe that by investing in your growth and well-being, we collectively strengthen our ability to achieve greatness. From tailored development programs to a supportive and inclusive culture, we are dedicated to providing the resources and encouragement needed for you to become the best version of yourself. Your success is not just a professional goal; it's our shared commitment.

Job Description

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).

Scope of Work

• 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

Knowledge, Skills, And Abilities

• 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

Maximum Base Pay

115,000.00 USD