David Granzin
Fullstack Engineer
Skills
Languages
TypeScript, Go, Rust, SQL, CSS
Web Frameworks
NextJS, React, TailwindCSS, Astro, Qwik
General Technologies
EffectTS
DevOps
Kubernetes, Docker, Terraform, Pulumi, Github Actions, OpenTelemetry
Databases
Postgres, Redis, MySQL, ClickHouse
Natural Languages
English (fluent), German (native)
My Current Tech Stack
Fullstack
TypeScript, EffectTS, React, NextJS, TailwindCSS, trpc, react-query, Drizzle, Posgres, ClickHouse
Backend and Background Jobs
Go, Postgres, Redis
Work Experience
T-Systems International
Senior Fullstack Engineer
Okt 2023 - Now
Leading development of the department's internal front-end tooling. Primary maintainer of an
open-source Design System. Working on various customer projects, from simple Go backends to
full-stack NextJS applications.
Also involved in developing healthcare software and services.
TeamOneDevelopers
Senior Fullstack Engineer
Juli 2023 - Sept 2023
Redesigned and modernized the company's tech stack to NextJS (React). Built the company website from scratch, dramatically improving load times and overall performance. The new architecture enhanced scalability and maintainability, making it easier for other developers to work with and expand upon.
transentis
Lead Fullstack Engineer
Jan 2022 - Juni 2023
Focused on evolving an internal business szenario simulator tool to support customers in understanding the impact of business decisions. Additonally build several internal and external applications ontop of the tool.
transentis
Fullstack Developer
July 2019 - Dez 2021
Designed and developed full-stack applications using NextJS for internal and external clients. Crafted responsive user interfaces with a focus on accessibility and user experience. Implemented backend solutions including RESTful APIs and database integrations to support application features and data management.
transentis
Internship
Sep 2017 - Nov 2017
Contributed to a React project for a large client, implementing smaller tasks that continue to be used internally by over 4,000 employees today.
Projects
- Build a video editor to generate before and after marketing videos
- Developed a local first desktop app.
- Build a Web Analytics Platform
- Build a privacy friendly SDK for the platform
- Analyzed and proceded over 10 million page views total
- Scaled a Postgres cluster to over 600 million rows.
- A React Component Library and Design System
- Getting used by multiple teams inside the company aswell as external customers.
Kahri
- Sucessfully scraped and parsed over 150 million League of Legends games
- Build a Microservice based game discovery and analytics platform, handling 100s of matches per second
- A Frontend displayed the analyzed data in useful ways for players to imrpove and gain insights.
- Scaled a Postgres cluster to over 600 million rows.
Hazel
- Build a platform to help developers from 3rd party services, to make them more consistent and to have trust that they arrive
- A Typescript based SDK to make receiving webhooks complelty type safe.
Education
Code University Berlin
Bachelor of Science in Computer Science
Berlin, Germany
Currently
Leibniz Gynamisum
Abitur
Berlin, Germany
2013 to Jul 2019