Headshot of Cory Streiff

Hello!

I'm Cory Streiff, a Berlin-based Product Engineer with 5 years of experience building scalable digital products that solve real problems and create lasting impact.

I’ve worked across startups, scale-ups, and nonprofits, helping teams design and ship the right technical solutions for the right customers. I love collaborating with designers, developers, and PMs to turn ideas into great products we can all be proud of.

My main stack includes JavaScript/TypeScript (Node.js, React), Ruby, and SQL. I’m currently learning Go, and I’m always open to picking up new tools and frameworks to fit the team and the challenge.

You can reach me at c.streiff@pm.me or let’s connect on LinkedIn.

Background

I graduated from Georgia Institute of Technology (Atlanta, USA) with a degree in Material Science & Engineering. I worked in that field for six years, first at an R&D startup and then at a materials consultancy in New York, working with designers and engineers at Fortune 500 companies.

But after having designed and engineered physical products, I decided to transition to digital products—pursuing a longtime interest in computer science. I then graduated from a 2 year program in Launch School Curriculum and multiple other courses to broaden my tech stack, learn about Product Design and Product Thinking.

I’ve worked with US based companies and nonprofits, German climate start-ups and most recently a Singapore based ed-tech scale up.

At the core, I care about building products that solve real problems—and doing it in close partnership with people who care just as much.

Skills

Languages

  • Ruby
  • TypeScript
  • JavaScript
  • SQL
  • HTML
  • CSS

Frameworks

  • Rails
  • React
  • Grape
  • Next.js
  • Node.js

Tools

  • Redis
  • Bash
  • Git
  • PostgreSQL
  • Firebase

Infra

  • AWS
  • GCP
  • Heroku
  • Docker
  • CI/CD

Experience

Sep 2022 - Present

Product Engineer @ KodeKloud

Berlin, Germany

As a Product Engineer on a small, self-organized team, I led the rebuild of a high-traffic Learning Management System (LMS) from the ground up—migrating a legacy WordPress platform with over 600k users to a modern, scalable architecture using Ruby on Rails and React. Working closely with developers, product managers, and customer specialists, I helped shape product direction, proposed architectural decisions, and delivered a reliable platform with seamless third-party integrations, improved performance, and better user experience.

  • Ruby
  • Rails
  • React
  • TypeScript
  • PostgreSQL
  • GCP

May 2022 - Present

Full Stack Software Developer @ Ragnarson

Berlin, Germany

As a Full-Stack Developer in a software house, I worked with a range of clients, including Berlin start-ups, climate tech and SaaS businesses, to build reliable, tested code while playing an active role in shaping the product decisions. I collaborated closely with stakeholders, helping guide technical decisions and ensuring we stayed aligned with the product’s goals.

  • Ruby
  • Rails
  • React
  • TypeScript
  • PostgreSQL
  • GCP

May 2021 - June 2022

Full Stack Developer @ Concrete Jungle

Atlanta, Georga (remotely)

Developed and maintained new features for a web application that enables users to map public, edible trees in Georgia, adding details about the trees and their seasonal availability, helping organize community events to harvest and distribute free food to food-insecure populations.

  • Node.js
  • Express
  • React
  • HTML
  • CSS

Feb 2020 - May 2021

SEO Data Analyst @ BOLD

Warsaw, Poland

As a Data Analyst for an online resume builder in the USA and EU, I used R and SQL to analyze web traffic data, identifying key content opportunities to support SEO strategies. My work in data cleaning and processing helped optimize content performance and improve search engine rankings.

  • R
  • Javascript
  • HTML
  • CSS

Nov 2015 - Nov 2017

Material Specialist @ Material Connexion

New York City, New York

As a Material Science Specialist and Consultant for a renowned firm in New York, I worked with Fortune 500 companies on material innovation for physical products. I managed our materials library, documenting and sourcing materials, while also collaborating with well-known brands on projects focused on product innovation, sustainability, and sourcing.

  • Material Science
  • Consulting

Jan 2013 - Apr 2015

Materials Engineer @ Verco Materials

Atlanta, Georgia

Optimized spray drying manufacturing process of raw boron carbide to create high density and low porosity parts for armor applicaitons.

  • Research and Development
  • Statistical Analysis
Download Resume  

Projects

I enjoy contributing to open-source projects whenever I can. You can find all my contributions on GitHub, but here are a few highlights: