Backend Engineer

The ideal candidate is someone who possesses a deep passion for software and a profound desire to contribute to enhancing patient treatments through technological innovation. Your innate inquisitiveness, coupled with an unwavering enthusiasm for challenging assumptions, sets you apart. With excellent communication skills in both spoken and written English, you thrive in collaborative environments, where the exchange of ideas is paramount.

As a self-starter, you relish the opportunity to excel in a fast-paced startup environment, taking ownership of technology decisions and roadmaps. Your commitment to driving innovation aligns seamlessly with the ethos of our team, making you an invaluable asset in shaping the future of software at Ketryx. You are driven by a genuine love for software, a desire to improve patient outcomes, and the excitement of navigating cutting-edge challenges.

Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of employment Visas (including H-1B), F-1 visas, or Optional Practical Training (OPT) status at this time.

• →Backend Development
   Build features end to end — API design, business logic, and integrations between the Ketryx platform and external systems and workflows. Contribute to improving latency, throughput, and fault tolerance across the backend stack.
• →Database Work
   Design and evolve PostgreSQL schemas, write efficient queries, and apply indexing strategies to keep the database performant as the product grows.
• →Maintainable Systems
   Write clean, well-tested code and contribute to standards around migrations, documentation, and testing.
• →Operational Reliability
   Participate in monitoring, debugging, and incident response. Help identify performance bottlenecks and reliability issues, and contribute fixes.
• →Frontend When Needed
   Take features across the finish line in our React/Next.js frontend — you won't own the design system, but you should be comfortable building the UI for the backend work you ship.
• →Collaboration
   Engage directly with customers, collect feedback, and shape product features with designers, product managers, and the Boston team (Pre-Sales, Sales, Post-Sales, Marketing). Provide technical support to customers alongside Client Operations.

• Ability to work in a fast-moving startup environment, taking ownership of features and pushing them forward
• 3+ years of full-time industry experience building production web applications, with a focus on backend development
• Solid skills in TypeScript
• Experience with PostgreSQL or a comparable relational database: schema design, writing efficient queries, and basic performance tuning
• Working knowledge of React, enough to build and modify UI for the features you own
• Solid understanding of backend maintainability, including refactoring and managing technical debt
• Comfortable collaborating across teams in English and participating in technical discussions and design review.

• Experience with Prisma and Next.js
• Experience with GraphQL (urql or Apollo)
• Familiarity with AWS services like S3, RDS, and ECS
• Familiarity with Docker in production or near-production environments
• Strong testing habits (Vitest, Playwright, Cucumber)
• Prior experience with logging and observability tools such as Datadog, AWS CloudWatch, or Sentry
• Experience building AI-related features, particularly for large language models
• Experience working in regulated industries like healthcare or finance.

• Frontend: TypeScript, React, Next.js, Tailwind
• Backend: PostgreSQL, Redis, GraphQL, Prisma
• Testing: Vitest, Playwright, Cucumber
• Infrastructure: AWS (e.g. S3, RDS, ECS), Datadog
• Collaboration: Slack, GitHub, Figma, Jira, Confluence