Lead the design and implementation of scalable back-end systems for a finance marketplace, ensuring system integration and scalability while mentoring engineering teams.
Wellfit is the dental industry’s fintech solution! A healthcare fintech company that enhances experiences between patients, providers, employers and payors. Wellfit provides access to treatment and care of all by removing financial barriers.
About the role:
Wellfit Technologies is seeking an experienced Senior Software Engineer Lead to lead the design and implementation of scalable, resilient, and modern back-end systems that power our Finance Marketplace platform. This role is central to shaping the technical strategy for FMP, with a strong emphasis on C#, .NET, and scalable architectural patterns. The Senior Software Engineer Lead,will collaborate with product, engineering, and leadership teams to drive integrations, scalability, and innovation across the marketplace.
This is a critical leadership role requiring not just deep technical expertise, but also the ability to rally teams, communicate effectively, and help Wellfit evolve toward a best-in-class, modern microservices architecture.
Key Responsibilities
Architecture & Design
• Architect scalable, secure, and performant back-end systems to support the Finance Marketplace platform.
• Lead architectural strategy, balancing the hybrid environment of monolithic and microservices systems while charting a path toward a modern, service-oriented architecture.
• Ensure system scalability to handle large volumes of transactions, integrations, and marketplace growth.
Integrations
• Design and oversee integrations with external lenders, financial partners, and healthcare stakeholders.
• Lead the technical design for onboarding new partners and scaling integrations efficiently.
Leadership & Collaboration
• Provide technical leadership, mentorship, and guidance to engineering teams.
• Champion best practices in software engineering, design patterns, scalability, and security.
• Collaborate across product, DevOps, and infrastructure teams to align technical strategy with business goals.
• Exhibit strong gravitas to bring teams together, foster collaboration, and drive delivery without excessive bureaucracy.
Innovation & Growth
• Identify opportunities to refactor existing systems for improved scalability, modularity, and performance.
• Incorporate modern engineering practices (microservices, Azure, containerization, CI/CD) into FMP’s architecture.
• Partner with AI and analytics teams to introduce intelligent features, such as customer offer matching, risk scoring, and predictive analytics.
Qualifications:
Education
Bachelor’s degree in Computer Science, Engineering, or related field (Master’s preferred).
Experience
• 8+ years of software development, with 4+ years in back-end architecture or systems design.
• Proven experience in architecting and scaling transaction-heavy systems.
• Strong expertise in C#, .NET, and SQL, with a deep understanding of enterprise system design.
• Solid experience with cloud platforms (Azure preferred), microservices, APIs, and containerization (Docker, Kubernetes).
• Background in designing secure, scalable integrations with external systems or third-party platforms.
• Experience guiding teams through hybrid architectures (monolithic + microservices) and evolving toward modern, scalable systems.
Leadership & Skills
• Demonstrated ability to lead, mentor, and inspire engineering teams.
• Strong communicator with the ability to work across technical and non-technical stakeholders.
• Practical, outcome-focused mindset: able to drive forward without being bogged down by bureaucracy.
• Excellent problem-solving and analytical skills, with a track record of designing robust, scalable systems.
Preferred:
• Experience in financial services, fintech, or healthcare platforms.
• Familiarity with lender integrations and transaction workflows.
• Exposure to AI/ML-driven product features and analytics.
• Understanding of compliance, data security, and risk management in a marketplace or financial context.
Why Wellfit?
• Make an Impact: Your work will directly shape the financial backbone of one of the most innovative healthcare fintech companies in the U.S.
• Work Flexibly: Hybrid model based in Dallas with 3 days/week in-office.
• Comprehensive Benefits: Full medical, dental, vision, and generous PTO.
• Invest in Your Future: Competitive salary, bonus eligibility, and 401(k) matching.
• Fast-Growth Environment: A rare opportunity to grow with a profitable startup on a national trajectory.
Top Skills
.Net
Azure
C#
Docker
Kubernetes
SQL
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