We’re looking for a backend-focused Senior Software Engineer to join our Boulder-based team and help architect and build the systems powering our privacy-first, data-driven platform.

This is a highly hands-on role combining backend engineering, distributed systems, data infrastructure, and cloud-native development. You’ll own significant parts of the platform, designing scalable systems to process, transform, and query large volumes of anonymized healthcare data and building the services that turn that data into insights and downstream applications.

We’re looking for someone who can operate as both a strong individual contributor and a technical leader. You’ll continue to design and write production code while also leading small teams or project workstreams, helping break down complex initiatives, coordinating execution, mentoring engineers, and driving technical decisions through delivery.

Design, build, and own backend systems and APIs using Python.

Build and optimize large-scale data-processing pipelines using Apache Spark.

Design systems for ingesting, transforming, aggregating, and querying large datasets.

Architect and operate distributed workloads on AWS using technologies such as EKS, EMR, and Airflow.

Lead small engineering teams or project workstreams while remaining a hands-on contributor.

Break down complex initiatives, drive technical decisions, coordinate execution, and help remove blockers.

Mentor engineers through design reviews, code reviews, debugging, and day-to-day technical guidance.

Improve the reliability, scalability, performance, security, and observability of production systems.

WHAT YOU WILL BRING

Senior Software Development Engineer

Responsibilities

Qualification

Required

Preferred

Benefits

Company

BranchLab

More roles at BranchLab