Kirill Langer

Senior Software Engineer II / Tech Lead
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Contact

langerkirill@gmail.com Broomfield, CO 80020 LinkedIn GitHub

Professional Summary

Data engineering tech lead building Databricks-based healthcare finance systems for value-based care. Current focus is MSSP financial data ingestion — a revenue-critical workflow representing nearly $1 billion annually — while supporting SOX compliance and public-company readiness, and mentoring a small engineering team. Background in behavioral neuroscience at Harvard and Boston Children's Hospital.

Technical Skills

LLMs

Claude Grok Gemini OpenAI

Harnesses

Codex Claude Code Grok Build Grok Bot Crew AI

Frontend

React React Native TypeScript JavaScript HTML CSS Redux Tailwind

Backend

Python GraphQL REST APIs

Mobile

Flutter Dart Kotlin Jetpack Compose

Cloud & Data

Databricks AWS SAM API Gateway Lambda CloudFormation IAM S3 EC2 Firebase PySpark Airflow SQL

Tools & Practices

Git CI/CD Agile

Professional Experience

Senior Software Engineer II / Tech Lead

Aledade · July 2025 – Current · Remote
  • Lead data engineering for Databricks-based healthcare finance systems that support value-based care, including MSSP financial data ingestion representing nearly $1 billion annually
  • Secure financial data pipelines, strengthen internal controls, and support SOX compliance and public-company readiness
  • Manage three contractors; previously led two full-time data engineers; grow the team through hiring and technical mentorship
  • Migrated a legacy distributed Python codebase onto Databricks and removed rebase-based deployments from core business logic
  • Teach engineers to use Claude and Codex for development, debugging, documentation, and day-to-day productivity

Senior Software Engineer

Cognito Health · July 2021 – July 2025 · Hybrid
  • Architected and implemented serverless infrastructure using AWS CloudFormation, ensuring successful multi-region deployments across UK and USA
  • Led development of cross-platform mobile applications using React Native and GraphQL, achieving seamless data synchronization
  • Managed a team of 5 developers, establishing engineering best practices and maintaining code quality through comprehensive reviews
  • Deployed AI-powered solutions leveraging multiple LLMs (Claude, Gemini, OpenAI) and automated workflows using Crew AI

Software Engineer

Tendril/Uplight · October 2018 – June 2021 · Boulder, Colorado
  • Developed high-impact energy report system using React, achieving 98%+ CSAT score with 100,000 monthly users
  • Engineered voice payment application for Amazon Alexa and Google Home using JavaScript
  • Implemented ETL pipelines using Airflow and PySpark for energy report quality control
  • Built Python/Pandas analytics pipelines that informed executive decision-making on strategic energy initiatives

Research Technician

Harvard University / Boston Children's Hospital, Crickmore Lab · March 2015 – October 2017 · Boston, Massachusetts
  • Led research on molecular basis of motivation, contributing to $2.7M in grant funding
  • Published as second author in Neuron journal on CaMKII's role in motivation
  • Mentored four undergraduate researchers in laboratory techniques and protocols

Projects

Rekindle Sauna

Full-Stack Booking Platform · Side Project
  • Built an end-to-end booking platform with Stripe payment processing, subscription management, and in-person terminal support
  • Architected a serverless backend using AWS SAM with 15+ Python Lambda microservices, DynamoDB, and API Gateway
  • Developed the frontend with React, TypeScript, and Chakra UI, featuring real-time availability, multi-location support, and Cognito authentication

Belaytionship

Mobile Application for Climber Networking
  • Developed full-stack mobile app using Flutter, Dart, and Firebase
  • Implemented social features including authentication, messaging, and profile matching
  • Managed state using Redux for seamless data synchronization

Education

App Academy

December 2018 – July 2019
  • Completed 1000+ hour intensive web development program (< 4% acceptance rate)

University of Colorado at Boulder

BA in Ecology and Evolutionary Biology · 2014
  • Awarded Undergraduate Opportunity Program grant for independent research
  • Completed international studies in Uppsala, Sweden

Publications

Thornquist SC, Langer K, Zhang SX, Rogulja D, Crickmore MA. (2020). CaMKII Measures the Passage of Time to Coordinate Behavior and Motivational State. Neuron, 105(2):334-345.e9

Cited 30 times · PubMed

Additional Experience