BillionToOne is hiring a
Senior Software Engineer, Digital Experiences (Oncology and Prenatal)
About BillionToOne
BillionToOne is ranked at the top 5% of Y Combinator companies with close to $400M in funding. In June 2024, we closed a $130M Series D resulting in a company valuation of over $1 billion. We have developed a DNA molecular counter that increases cfDNA diagnostic resolution by over 1,000x. Our first product, Unity, is the first and only non-invasive prenatal test that can directly screen an unborn baby and assess its risk for common and severe recessive gene disorders, chromosomal abnormalities, fetal sex, and fetal antigens from a single tube of blood from the pregnant mother.
Job Description
Senior Software Engineer, Digital Experiences (Oncology and Prenatal): Join BillionToOne to build and maintain digital experiences and backend systems that support genomic test results. You’ll work on scaling genomic pipelines, building digital infrastructure for complex test results, and shipping systems where correctness isn’t optional. Collaborate with clinicians and computational biologists on genuinely hard problems. Stack includes Python, Django, Postgres, React, TypeScript, AWS, Docker, Terraform, Kafka, CircleCI, Datadog. AI-assisted dev tools (Cursor, Copilot, Claude Code). This is one of several software-engineering openings across Oncology/ Prenatal/ AI.Remote
Remote Conditions
Hybrid (2-3 days/week)
Salary
280K
to
307K
Benefits
Unlimited access to the latest AI tools and models with unlimited usage; 100% paid medical on select plans; 16 weeks fully paid parental leave; 401(k) with 4% match; daily catered lunch; on-site gym
Tech Tags
AWSApache KafkaCircleCIClaude CodeCopilotCursorDatadogDjangoDockerPostgreSQLPythonReactTerraformTypescript
Equity Offered
Senior Role
Date Listed
02 March, 2026 (16 days ago)
