Senior Software Engineer

Senior Engineer, Frontend Platform

About the Role

You’ll be part of the Web Platform team, designing shared architecture, building component-based web solutions, and supporting both frontend and backend development across the company.

• Improve shared architecture, systems, and tools across web services and web pages
• Create frontend components and libraries using various web technologies
• Facilitate the adoption of shared code and libraries in web pages and web services
• Implement and manage frontend routing and request filtering processes
• Manage AWS-related resources

• 5+ years of experience with JavaScript / Node.js and frontend technologies such as HTML, CSS, and frontend frameworks like React, Vue, Svelte, Lit, Angular, etc.
• Experience writing or maintaining web component libraries
• Experience with server frameworks such as Fastify and Express
• Experience with reverse-proxy or other TCP/HTTP transport technologies and methods
• Experience with deployment and containerization concepts like CI/CD, IAC, and related technologies (e.g., Terraform, Docker)
• Experience with cloud-based compute infrastructure
• Experience with localization and accessibility best practices
• Ability to write effective tests (for example, BDD, TDD)
• Familiarity with AI coding assistants and agentic coding workflows and tools

• Familiarity with SEO best practices
• Understanding of UX design principles
• Experience with content delivery networks
• Application of security and privacy best practices
• Experience working with legacy code bases and technologies
• Experience with advanced web technologies, including web components, container queries, web workers, etc.
• Experience with Cloud-based server infrastructure, such as EC2, ECS, EKS, Fargate, and Route 53
• Ability to write effective prompts for code generation, debugging, and refactoring tasks

Base salary range: $114,480 - $139,590 with eligibility for bonus, equity, and comprehensive benefits including health, dental, and vision. Salary varies by location and experience.

Ancestry is an Equal Opportunity Employer that makes employment decisions without regard to race, color, religious creed, national origin, ancestry, sex, pregnancy, sexual orientation, gender, gender identity, gender expression, age, mental or physical disability, medical condition, military or veteran status, citizenship, marital status, genetic information, or any other characteristic protected by applicable law. In addition, Ancestry will provide reasonable accommodations for qualified individuals with disabilities.

All job offers are contingent on a background check screen that complies with applicable law. For candidates who live in San Francisco, CA, pursuant to the San Francisco Fair Chance Ordinance, Ancestry will consider for employment qualified applicants with arrest and conviction records.