C#/.NET Developer

About Leapfrog

Leapfrog is on a mission to be a role model technology company. Since 2010, we have relentlessly worked on crafting better digital products with our team of superior engineers. We’re a full-stack company specializing in SaaS products and have served over 100 clients with our mastery of emerging technologies.

We’re thinkers and doers, creatives and coders, makers and builders— but most importantly, we are trusted partners with world-class engineers. Hundreds of companies in Boston, Seattle, Silicon Valley, and San Francisco choose us to gain speed, agility, quality, and stability, giving them an edge over their competitors.

About the role

We are looking for a skilled and experienced C#/.NET Developer with a strong understanding of Object-Oriented Programming (OOP), Data Structures, and Algorithms (DSA). The ideal candidate should have hands-on experience in building scalable, high-performance applications using the Microsoft tech stack.

• Strong familiarity with Microsoft tech stack: Power BI, Power Automate, Azure, .NET, and TypeScript.

• Document-oriented — writes clear process documentation, implementation guides, and operational runbooks that support handoffs, audits, and future automation.

• Experienced in supporting Finance and Ops workflows, with an understanding of the stakes involved in reimbursement, revenue operations, or compliance-driven processes.

• Comfortable maintaining and running manual and semi-automated scripts in production environments with care and attention to detail. We use a Typescript scripting environment to run tasks in bulk using against our APIs.

• Demonstrated rigor in process validation, including pre-run checklists, double-entry checks, cross-system comparisons, and reconciliation steps.

• Proven ability to identify inefficiencies, recommend improvements, and transition manual or semi-automated scripts into fully automated backend services as part of a long-term automation strategy.

• Brings an eye for observability — proactively surfaces operational data, success/failure states, and key metrics in a way that’s accessible to both technical and non-technical stakeholders.

• Familiar with change management and understands how to safely introduce changes to operational workflows with version control, rollback strategies, and documentation.

• Able to coordinate across technical and non-technical teams (e.g., Finance, Ops, Customer Support) to ensure shared understanding of workflows and downstream impacts.

• Comfortable working in environments with high accountability, where process errors could have business or compliance consequences.

• Prior exposure to financial systems, reimbursement platforms, or insurance/benefits domains is highly desirable.

• Good Experience in Typescript and ReactJS

• Experience in Azure

• Bachelor’s degree in Computer Science or related field

• 5+ years of experience in software development using C#/.NET

• Solid understanding of OOP principles and software design patterns

• Strong knowledge of DSA and problem-solving techniques

• Experience with .NET Core/.NET Framework, Web APIs, and RESTful services

• Familiarity with SQL Server or other relational databases

• Experience with version control systems like Git

• Good communication and analytical skills