Senior Software Engineer (Backend)

FL113 is a fast-moving AI diagnostics company with a bold ambition: to define the future of pre-emptive and proactive care. We are building products that help uncover disease before it becomes visible, equip patients and care teams with earlier insight, and enable meaningful intervention before disease advances and causes irreversible harm.

As Senior Software Engineer, Backend & Data, you will report to the VP of Engineering and own major parts of the system that turns EHR data from our health-system partners into results our partners can trust. The core of the role is backend, data, and EHR integration engineering on AWS.

Key Responsibilities:

• Build the Data and EHR Integration Platform: Design, build, and operate secure, auditable pipelines on AWS that take partner EHR data from ingestion to model-ready tables and evaluated results, with PHI handled correctly at every step.
• Build and extend EHR integrations, starting with athenahealth’s FHIR APIs, across new EHRs, data formats, and partner environments.
• Build AI-assisted tooling, together with our data scientists, that makes onboarding new partners and data sources faster and more repeatable.
• Lead technical go-lives with partner IT and data teams, and see issues through to resolution.

Flex Where the Company Needs You:

• Infrastructure, DevOps, and security: infrastructure as code, CI/CD, monitoring, and the HIPAA and HITRUST controls our partners expect.
• ML and model operations: package, run, and monitor models in production, sharing accountability with Research for real-world performance.
• Product and full-stack: build the reports, dashboards, and clinician- and patient-facing products that our partners, patients, and care teams use.

Build the Engineering Foundation:

• Set the engineering standards a growing team will inherit, and help hire and mentor the engineers who join next.
• Use AI coding agents and automation to multiply what a small team can do, with sound judgment about their use near PHI.

What success looks like:

• In six months: New partner sites onboard through configuration rather than custom engineering, and you are a trusted technical counterpart for our partners.
• In twelve months: You have shaped the architecture of FL113’s first products and the engineering practices a larger team will use.

What We Look For:

• BS in Computer Science or a related field, or equivalent practical experience, and at least 7 years of professional software engineering experience building and operating production backend systems and data pipelines.
• Hands-on healthcare data experience, including EHR data, FHIR or HL7, clinical vocabularies such as LOINC, SNOMED, ICD, and RxNorm, and systems that handle PHI under HIPAA.
• Substantial production experience on AWS, and proficiency in Python and SQL.
• Experience running AI/ML systems in production, working in shared code and pipelines with data scientists or ML researchers.
• Daily use of AI coding agents and agentic workflows, while reviewing outputs and staying accountable for correctness, security, and privacy.

Benefits:

• Healthcare coverage
• Annual incentive program
• Retirement benefits

The salary range for this role is $108,000 - $186,000.