Senior Full Stack Engineer

Build and Scale Core Systems Design, build, and evolve core services and platform capabilities that support KEV’s SaaS products at scale. Lead system design and architectural decisions, including event-driven patterns where appropriate, to ensure reliable, high-performance systems across complex, high-volume workloads.

Deliver Full-Stack Capabilities Drive the design and development of user-facing experiences using modern frontend frameworks such as React, while shaping backend services and APIs built with C# and ASP.NET. Ensure frontend and backend systems are aligned, performant, and built for long-term maintainability.

Financial Platform Trust Build and maintain software that processes financial transactions with a strong focus on correctness, traceability, and security. Ensure financial workflows are resilient, failures are handled predictably, and customer trust is protected.

Production Reliability Own the reliability of the systems you contribute to by diagnosing production issues, improving observability, and strengthening operational practices that support stable releases and day-to-day platform health.

Data and Performance at Scale Design and optimize relational data models and SQL queries that support high-volume production workloads. Balance performance, data integrity, and maintainability as systems evolve.

Quality Engineering Write clean, maintainable, and well-tested code, applying shift-left practices such as unit and integration testing to catch issues early. Contribute to improving engineering standards, development workflows, and technical decision-making across the team.

Cross-Functional Collaboration Partner closely with Product Managers, Designers, and Engineering peers to shape scope, assess trade-offs, and deliver well-defined solutions. Communicate clearly about technical constraints, risks, and progress to support predictable delivery.

8+ years of professional experience building and operating production SaaS software, with significant experience in full stack or backend-heavy roles.

Deep expertise in C# and ASP.NET, with a strong track record designing and evolving API-driven systems in distributed environments.

Strong grounding in object-oriented design, design patterns, and SOLID principles, with the ability to apply them pragmatically in large, evolving codebases.

Strong frontend experience building modern web applications using React, JavaScript, HTML, and CSS, with a focus on performance and usability.

Proven experience designing systems that operate at scale, including shaping architecture, defining service boundaries, and making sound trade-offs under real-world constraints.

Experience building or operating financial systems, payments platforms, or transaction-heavy applications where correctness, security, and traceability are critical.

Strong working knowledge of SQL and relational databases, including schema design, query optimization, and data integrity in high-volume production systems.

Experience working with cloud platforms (Azure preferred), including deploying, operating, and evolving services in production.

A disciplined approach to engineering quality, with experience applying shift-left testing practices, code review standards, and operational rigor to improve reliability.

Comfortable partnering with Product, Design, and Engineering peers to shape scope, assess trade-offs, and deliver outcomes in ambiguous problem spaces.

A clear, pragmatic communicator who can explain complex technical decisions and influence direction across teams.