Senior Backend Engineer (Core Product)

Sequencing; Davenport (IA); On-site; USD 120,000 - 170,000; Full time

Job summary

Sequencing seeks a Senior Backend TypeScript Engineer to design, build, and operate high-performance backend services powering personalized health experiences based on genomic data.

You will collaborate with senior engineers to scale infrastructure APIs and event-driven services, ensuring fast, reliable access to DNA insights under load. Strong emphasis on code quality, observability, and continuous improvement.

Qualifications

• 5+ years of backend development experience.
• Expert with TypeScript and comfortable owning production backend services.
• Experience with functional programming.
• Deep hands on experience with PostgreSQL, MySQL, and service based architectures.
• Strong debugging, testing, and performance tuning skills.
• Able to work independently while collaborating closely with key teammates.

Responsibilities

• Design, build and maintain performant backend services in TypeScript that power our core personalized experiences.
• Build and grow scalable infrastructure APIs and event driven services that deliver data driven features to users.
• Support and optimize production ready backend systems so they stay fast and dependable under load.
• Integrate and manage services such as PostgreSQL, MySQL, AWS SQS, and Centrifugo in the backend.
• Make systems reliable, secure, and observable so people can trust their DNA data is safe.
• Own and drive end to end feature development with a strong eye on user experience.
• Write clean reliable code with performance and maintainability in mind from the start.
• Champion clean code, technical excellence, and continuous improvement across the team.
• Debug, test, and performance tune across services to catch problems before users feel them.
• Maintain modernize and migrate legacy code so older systems keep up with new demand.
• Take ownership of complex problems and drive them to a clear working solution.

Skills

Backend development

TypeScript

Functional programming

PostgreSQL

MySQL

System design

Tools

PostgreSQL

MySQL

AWS SQS

Centrifugo

Job description

Overview

As a Senior Backend TypeScript Engineer you build and maintain the high performance backend services that power our core personalized health experiences. You work side by side with other senior engineers to build and grow scalable infrastructure APIs and event driven services. When you do this well people get fast reliable personalized health insights from their genome instead of slow or broken experiences.

Responsibilities

• Design, build and maintain performant backend services in TypeScript that power our core personalized experiences.
• Build and grow scalable infrastructure APIs and event driven services that deliver data driven features to users.
• Support and optimize production ready backend systems so they stay fast and dependable under load.
• Integrate and manage services such as PostgreSQL, MySQL, AWS SQS, and Centrifugo in the backend.
• Make systems reliable, secure, and observable so people can trust their DNA data is safe.
• Own and drive end to end feature development with a strong eye on user experience.
• Write clean reliable code with performance and maintainability in mind from the start.
• Champion clean code, technical excellence, and continuous improvement across the team.
• Debug, test, and performance tune across services to catch problems before users feel them.
• Maintain modernize and migrate legacy code so older systems keep up with new demand.
• Take ownership of complex problems and drive them to a clear working solution.

Qualifications

• 5+ years of backend development experience.
• Expert with TypeScript and comfortable owning production backend services.
• Experience with functional programming.
• Deep hands on experience with PostgreSQL, MySQL, and service based architectures.
• Strong debugging, testing, and performance tuning skills.
• Able to work independently while collaborating closely with key teammates.
• Customer driven with a passion for building systems that deliver exceptional experiences.
• Nice to have familiarity with genomics health data or personalization systems, startup or fast paced environments, or Rust.