BillionToOne · 18 hours ago
Senior Software Engineer, Prenatal
Menlo Park, CA
Full-time
Hybrid
Senior Level
$190K/yr - $211K/yr
5+ years expBillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. They are seeking a Senior Software Engineer to join their dynamic software engineering team to develop scalable backend services and collaborate with cross-functional teams to enhance their platform capabilities.
BiotechnologyGeneticsHealth DiagnosticsMedical
Responsibilities
Design, build, and operate scalable, high availability backend services, APIs, and data integrations that power customer facing product experiences
Lead technical delivery across the full lifecycle: architecture, design, implementation, testing, deployment, and ongoing operations
Collaborate closely with product, design, and cross functional engineering teams to deliver performant, reliable, and intuitive platform capabilities
Develop clean abstractions and platform APIs that simplify complex LIS workflows while balancing developer velocity with long term system stability
Build and maintain secure, reliable cloud infrastructure on AWS, including compute environments, networking, container orchestration, storage, and environment automation
Implement CI/CD pipelines, Infrastructure as Code, configuration management, and automated environment provisioning to standardize and accelerate delivery
Embed observability and operational excellence into the platform by default through robust monitoring, logging, alerting, and reliability patterns
Ensure the scalability, maintainability, and overall health of backend and cloud systems as the platform grows to support large enterprise workloads and future global expansion
Foster a culture of ownership, technical excellence, learning, and continuous improvement within the engineering team
Apply AI-assisted tooling and workflows to improve developer productivity, automate routine engineering tasks, enhance code quality, and accelerate troubleshooting
Qualification
Required
5 - 7 years of professional software development experience with a proven track record of delivering complex projects adhering to best practices
Deep understanding and experience using web frameworks like Django and FastAPI
Strong system design and architecture capabilities, applying domain-driven design to translate complex business domains into clear, scalable service and data boundaries
Familiarity with modern AI-driven development practices and tools
Strong foundation in cloud services, preferably AWS, including ECS, S3, AWS Batch, EC2, and AWS Lambda, enabling effective architecture and management of complex systems
Excellent communication and collaboration skills, with the ability to work effectively in a team-oriented environment
Excited about working in-person with our team in Menlo Park
Benefits
Multiple medical benefit options; employee premiums paid 100% of select plans, dependents covered up to 80%
Extremely generous Family Bonding Leave for new parents (16 weeks, paid at 100%)
Supplemental fertility benefits coverage
Retirement savings program including a 4% Company match
Increase paid time off with increased tenure
Latest and greatest hardware (laptop, lab equipment, facilities)
Daily on-site lunches provided from top eateries
A variety of perks on campus (state of the art gym, restaurant)
Free on-site EV charging (compatible with all EVs, including Tesla)
Free healthcare options
401k match
Very generous fully paid parental leave
Company
BillionToOne
BillionToOne is a precision diagnostics company that focuses on genetic testing for disease detection.
501-1000 employees
H1B Sponsorship
BillionToOne has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (10)
2024 (6)
2023 (2)
2022 (2)
2021 (1)
2020 (2)
Funding
Current Stage
Public CompanyTotal Funding
$425.9MKey Investors
Premji InvestBridge BankHummingbird Ventures
2025-11-06IPO
2024-06-21Series D· $130M
2022-12-15Series C· $48.5M
Leadership Team
J
Jean Hayden
VP of Operations and Chief of Staff to the CEO
Oguzhan Atay
Co-founder and CEO
Recent News
2026-01-16
Company data provided by crunchbase