Api Tester Remote Jobs in Kansas (NOW HIRING)

About the Role

NinjaOne is investing in a new Endpoint State and Control team, and we're looking for a Senior Software Engineer, React to help build it from the ground up. This is a true greenfield opportunity — you won't be inheriting years of legacy patterns or untangling technical debt, you'll be in the room helping define the architecture, conventions, and component patterns that the rest of the team will build on. If you want to make foundational decisions rather than work within someone else's, and you want your fingerprints on a product from its earliest lines of code, this is that role.

You'll work primarily in React and TypeScript, with the freedom to go deep on frontend architecture — component design, state management, testing strategy — while also having real influence over the API contracts your UI depends on. Our engineering team moves fast, experiments with AI tools as part of our everyday workflow, and gives engineers genuine ownership rather than tightly scoped tickets. If you want to build ambitious, brand-new UI for a product where the stakes (security, trust, scale) are real, and you want a seat at the table when it comes to defining how a feature should work — not just how it should look — this is that role.

Location - We are flexible on remote working from home, if you are located in the USA and reside in one of the following states - CA, CO, CT, FL, GA, *IL, KS, MA, MD, ME, NJ, NC, NY, OH, OR, TN, TX, VA, and WA. We have physical offices in Austin, TX and Tampa, FL, if you prefer a hybrid option.

We hire the best software engineers, but experience in our stack can’t hurt: NinjaOne is built on Java, Kotlin, C++, Golang and Postgres; supporting millions of user endpoints and running as a scalable cloud service in AWS.  Knowing large-scale datastore bottlenecks, asynchronous application design and client-server architecture will help you.

What You’ll be Doing

• Design and build new frontend surfaces for the Endpoint State and Control team from scratch, with real input into architecture, component structure, and conventions from day one
• Lead UI technical design end-to-end for your features — defining API contracts alongside backend engineers, architecting components, and setting the test strategy
• Translate Figma designs into accurate, production-ready UI, while pushing back with informed engineering and UX perspective when a design needs to flex for feasibility
• Write and maintain thorough unit and integration tests (Jest, React Testing Library) as a non-negotiable part of shipping any component
• Help establish the patterns, standards, and shared components that will shape how the Endpoint State and Control team builds going forward
• Partner cross-functionally with backend engineers, designers, and product managers as the team's roadmap and priorities take shape
• Bring AI tools into your day-to-day development workflow and help the team figure out where they genuinely speed things up
• Other duties as needed

About You

• 7+ years of frontend engineering experience, with expert-level React (18+) and TypeScript
• A track record building complex, data-driven UI — tables, modals, multi-step forms, or other intricate interfaces — from the ground up
• Experience with React Query (TanStack Query) or an equivalent server-state management approach
• Strong testing habits: you write and maintain unit and integration tests (Jest, React Testing Library or similar) as a matter of course, not an afterthought
• Comfortable working from Figma designs with high fidelity, and confident enough in your craft to push back with an engineering or UX rationale when needed
• Experience leading technical design for a feature end-to-end — from API contract through component architecture to test strategy
• Comfortable operating in ambiguity — you enjoy standing up new patterns and making foundational decisions rather than working within an established codebase
• Curious about and comfortable experimenting with AI tools as part of your development workflow

Nice to have:

• Experience with Java 11+ or Kotlin (reading and contributing to backend code)
• Experience standing up a frontend codebase or team from scratch
• Familiarity with pnpm monorepos and shared component libraries
• Accessibility compliance experience in enterprise B2B products, and prior work in endpoint management, IT operations, or security tooling

About Us 

NinjaOne unifies IT to simplify work for nearly 40,000 customers in 140+ countries. ​

The NinjaOne Unified IT Operations Platform delivers endpoint management, autonomous patching, backup, and remote access in a single console to improve efficiency, increase resilience, and reduce spend. By automating IT and managing all endpoints, organizations give employees a great technology experience at work. ​ NinjaOne is obsessed with customer success and has retained a 98% customer satisfaction score for more than 5 years.

What You’ll Love 

We are a collaborative, kind, and curious community. 

We honor your flexibility needs with full-time work that is hybrid remote.

We have you covered with our comprehensive benefits package, which includes medical, dental, and vision insurance.

We help you prepare for your financial future with our 401(k) plan.

We prioritize your work-life balance with our unlimited PTO.

We reward your work with opportunity for growth and advancement.

Additional Information

This position is NOT eligible for Visa sponsorship.

*Due to operational policies, NinjaOne is unable to hire for this role within the city limits of Chicago. We will consider all qualified candidates who reside outside of the city proper or are willing to self-relocate.

Starting pay for the successful applicant depends on a variety of job-related factors, including but not limited to location, market demands, experience, job-related knowledge, and skills. The benefits available for this position include medical, dental, vision, 401(k) plan, life insurance coverage and PTO. For roles based in California, Colorado, Maryland, New Jersey, or Washington the base salary hiring range for this position is $140k - $200k per year.

For roles based in New York, the base salary hiring range for this position is $140k - $200k per year.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, veteran status, or any other status protected by applicable law. We are committed to providing an inclusive and diverse work environment.

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