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

Slidy
  • Build a video editor to generate before and after marketing videos
  • Developed a local first desktop app.
Safesight
  • 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.
Pixelshades
  • 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