Senior Software Engineer, Digital Experiences

About the role

Join BillionToOne, a pioneering company in the genomics industry, where we focus on transforming healthcare through innovative diagnostic solutions. As a Senior Software Engineer in our Digital Experiences team, you will play a crucial role in designing, developing, and maintaining software applications that directly impact patient care and healthcare provider workflows. You will work closely with cross-functional teams, including product management, design, and quality assurance, to create seamless and impactful digital tools. This position is based on-site in Menlo Park, California, and requires being physically present in the office 2-3 days per week, fostering collaboration and team cohesion.

Key facts

What you'll do

• Develop and enhance web applications utilizing modern frontend technologies such as React, Typescript, and CSS-in-JS libraries to create engaging and accessible user interfaces for healthcare professionals and patients.
• Collaborate with product managers, designers, and stakeholders to translate requirements into functional, scalable, and user-friendly digital solutions.
• Implement best practices in frontend architecture, including component-based design, state management, and testing strategies, to ensure code quality and maintainability.
• Write comprehensive unit tests and participate in code reviews to uphold high standards of software quality, ensuring robust test coverage across all modules.
• Work with backend teams to integrate APIs and data sources, primarily using Django and Postgres, ensuring smooth data flow and application performance.
• Take ownership of projects from initial concept through deployment, managing timelines and deliverables effectively.
• Mentor junior engineers, sharing knowledge and fostering a culture of continuous learning and improvement within the engineering team.
• Engage with stakeholders to gather feedback, refine features, and prioritize development efforts based on user needs and business goals.
• Stay current with emerging technologies, including AI-driven development tools, and evaluate their potential to improve development workflows and product capabilities.
• Contribute to the development of scalable, secure, and compliant software solutions that meet healthcare industry standards and regulations.
• Participate in agile development processes, including sprint planning, stand-ups, and retrospectives, to ensure timely delivery of features and fixes.
• Document technical designs, APIs, and user guides to facilitate knowledge sharing and onboarding of new team members.

Requirements

• At least 5 years of professional experience in software development, with a proven track record of managing complex projects and delivering high-quality applications.
• Strong proficiency in frontend development, especially with React, Typescript, and CSS-in-JS libraries, with an understanding of component-based architecture.
• Experience implementing frontend testing frameworks such as Playwright, and knowledge of best practices for frontend testing and automation.
• Familiarity with web frameworks, particularly Django, and experience integrating frontend applications with backend services.
• Knowledge of AI-assisted development tools and practices, such as Cursor, GitHub Copilot, and Claude Code, and an interest in leveraging these tools to improve productivity.
• Willingness and ability to work onsite in Menlo Park, California, collaborating closely with team members.
• Strong problem-solving skills, with the ability to approach complex technical challenges creatively and effectively.
• Excellent communication skills, capable of working with cross-functional teams and translating technical concepts for non-technical stakeholders.
• Experience working in a regulated environment, with an understanding of healthcare data standards like FHIR and HL7, is a plus.
• Demonstrated ability to mentor junior team members and promote best practices within the engineering team.
• A proactive attitude, with a focus on continuous learning, innovation, and delivering impactful solutions.

Nice to have

• Prior experience working in a startup environment or entrepreneurial setting, demonstrating adaptability and resourcefulness.
• Hands-on experience developing products from inception to launch, with a focus on user experience and scalability.
• Familiarity with healthcare data standards such as FHIR and HL7, and understanding of healthcare data privacy and security regulations.
• An interest in working with large language models (LLMs) and exploring their applications within healthcare or software development.
• Knowledge of cloud platforms like AWS and experience deploying scalable applications in cloud environments.
• Experience working with cross-disciplinary teams, including data scientists, bioinformaticians, and healthcare professionals.

Skills & tools

• Python, Django, Postgres, React, Typescript, AWS, Salesforce, and AI-assisted coding tools such as Cursor, GitHub Copilot, and Claude Code.
• Version control systems like Git, and familiarity with CI/CD pipelines.
• Agile development methodologies, including Scrum or Kanban.
• Testing frameworks such as Playwright for frontend testing.
• Familiarity with healthcare data standards (FHIR, HL7) is a plus.

Practical notes

• The role offers a comprehensive benefits package, including multiple medical plans with significant employer contributions, generous family leave, and retirement savings options with company matching.
• The total annual compensation is approximately $297,321, with a salary range of $190,081 to $211,201, depending on experience and other factors.
• Candidates must be willing to work onsite in Menlo Park, California, at least 2-3 days per week.
• The company supports visa sponsorship for qualified applicants and complies with ITAR regulations concerning sensitive healthcare data.
• BillionToOne is committed to fostering an inclusive and diverse workplace, welcoming applicants from all backgrounds.
• The position involves working with sensitive healthcare data and requires adherence to relevant data privacy and security standards.
• Candidates are encouraged to demonstrate a proactive approach, a passion for innovation, and a commitment to improving healthcare through technology.