I've worked at a variety of companies from seed series startups to FAANGs. While I enjoy contributing anywhere in the stack, my deepest experience is in the backend. I've built many APIs and pipelines, lately with a focus on RAG to enable agentic LLMs.

I do not have a strong language preference and prefer to use the right tools for the problem at hand. I've worked in Ruby, Typescript, Node.js, Python, and Haskell, with frameworks including Flask, FastAPI, GraphQL, React, Ruby on Rails, Tailwind CSS, Next.js, Airflow, and Prefect, across GCP and AWS. I also love optimising Postgres performance.

I am always open to consulting projects. Feel free to reach out at jilliankozyra AT gmail.com

I like upskilling and professionalising engineering orgs, with an eye towards quality hiring, collaboration, code quality, documentation, and speed of iteration. I feel very strongly about small, stacked PRs.

I have led teams from 2-6 engineers and am comfortable designing hiring processes, building teams, developing roadmaps, and delivering feedback.

I boulder 2-3 times a week (3-4 in the cycling offseason), usually at Dogpatch Boulders in San Francisco. My favourite NYC-area gym is Method in Newark, NJ. They have some of the best setting I've ever experienced (if you like more modern setting styles). I like to visit local gyms when I travel to check out the different syles of problems.

I am working towards projecting V9.