Full Stack Engineer

Ossium Health•San Francisco, CA

3h•$160,000 - $185,000•Hybrid

About The Position

We’re hiring a Full Stack Engineer to join our growing tech team. This person will play a critical role in building and expanding our bone marrow matching platform; most critically, leading the development of a new, physician-facing front-end application that sits on top of our robust HLA (Human Leukocyte Antigen) matching donor database of cryopreserved bone marrow. This front-end platform will be used daily by physicians, nurses, and transplant coordinators at transplant centers and hospitals both nationally and globally to search our one-of-a-kind bone marrow bank, enabling life-saving matches for patients with blood cancers. The tool must be intuitive, reliable, and scalable as our donor network and transplant partnerships continue to grow. The ideal candidate will approach this with care for end users who are non-technical clinical professionals, and build something that is both user-friendly and consistently functional. In addition to this high-priority project, this engineer will maintain and expand our data infrastructure, internal dashboards, and cross-functional tools. This role reports to the Director, Technology.

Requirements

Bachelor’s Degree in Computer Science, Data Science, IT, or related field
6+ years of professional software development experience
Advanced proficiency in Python, including modern libraries and frameworks
Strong experience with Django or Flask, specifically utilizing server-side rendering (Jinja2) or HTMX for interactive front-ends
Strong back-end development skills, including RESTful APIs and microservices
Proven experience building and deploying SMART on FHIR apps
Deep understanding of OAuth 2.0, OpenID Connect, and FHIR R4
Familiarity with database systems (e.g., PostgreSQL, MySQL, NoSQL, MSSQL) and data pipeline architecture
Experience building dashboards or internal tools for operational teams
Excellent written and oral communication skills, including ability to work closely with clinical end users and key internal (non-technical) stakeholders to gather and translate requirements
Ability to operate with high organization and excellent time management in a dynamic startup environment
This position is based in our San Francisco office; we maintain a hybrid schedule of Monday–Thursday in the office, with Friday as a remote work day

Nice To Haves

Data science or computational biology background, ideally with experience in a scientific computing environment
Proficiency with scripting and automation for deployment and system integration
Knowledge of CI/CD systems (e.g., GitHub Actions, Jenkins) and infrastructure tools (e.g., Docker, Terraform)
Familiarity with clinical terminologies (LOINC, SNOMED, ICD-10).
Experience with Data Mapping and Data Transformation (specifically converting internal database schemas to FHIR-compliant resources like Observation or ResearchStudy)
Familiarity with HLA typing, bone marrow transplantation, or stem cell biology

Responsibilities

Develop and maintain a physician-facing SMART on FHIR application using a Python-based web stack
Manage the app registration and lifecycle on the open.epic and Epic Showroom portals
Ensure HIPAA compliance and robust security protocols for data in transit and at rest
Partner with hospital IT teams (Epic Bridges/Interconnect analysts) to facilitate technical 'handshakes' and security reviews for app deployment
Collaborate closely with internal scientists as well as clinical and commercial stakeholders to translate complex matching logic into a clean, intuitive user experience
Maintain and improve our HLA matching platform built with Python
Design and implement back-end systems, services, and APIs to support data-driven applications
Work with both structured and unstructured data to develop internal dashboards and visualization tools
Contribute to system architecture, code quality, and design decisions across the platform
Automate processes and pipelines to improve efficiency and data integrity
Build robust, maintainable codebases
Promote optimal coding practices, perform code reviews, and mentor peers to improve code quality
Support and enhance CI/CD pipelines, SSO integrations, and secure deployment environments