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Freelance product engineer — full-stack development plus the product judgment that usually sits in a separate role. _Website not available. Sign in: https://www.twine.net/signup_ Seven years building for startups across Europe and Australia. I work with founders on full-stack apps, MVPs, and Webflow sites, from first-call discovery through shipping and handoff. Stack: TypeScript, Node.js, React, React Native, Webflow. Background in business before engineering — MBA, seven years of shipping. The combination is the point: I can talk through a product call and write the code in the same conversation, instead of passing the brief between three people. Originally from Berlin, currently based in Australia, working across European time zones. Past clients include CEEZER (carbon credit marketplace, built ground-up), Porsche Digital Campus, LAP Coffee (mobile rewards app), Parametrix (international Webflow rebuild), n8n, Conlio, CarOnSale, and Le Wagon.…Freelance product engineer — full-stack development plus the product judgment that usually sits in a separate role. _Website not available. Sign in: https://www.twine.net/signup_ Seven years building for startups across Europe and Australia. I work with founders on full-stack apps, MVPs, and Webflow sites, from first-call discovery through shipping and handoff. Stack: TypeScript, Node.js, React, React Native, Webflow. Background in business before engineering — MBA, seven years of shipping. The combination is the point: I can talk through a product call and write the code in the same conversation, instead of passing the brief between three people. Originally from Berlin, currently based in Australia, working across European time zones. Past clients include CEEZER (carbon credit marketplace, built ground-up), Porsche Digital Campus, LAP Coffee (mobile rewards app), Parametrix (international Webflow rebuild), n8n, Conlio, CarOnSale, and Le Wagon.

Charlotte Hetzler

PRO

AI Developer, AI Engineer, App Developer, +4

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Freelance product engineer — full-stack development plus the product judgment that usually sits in a separate role. _Website not available. Sign in: https://www.twine.net/signup_ Seven years building for startups across Europe and Australia. I work with founders on full-stack apps, MVPs, and Webflow sites, from first-call discovery through shipping and handoff. Stack: TypeScript, Node.js, React, React Native, Webflow. Background in business before engineering — MBA, seven years of shipping. The combination is the point: I can talk through a product call and write the code in the same conversation, instead of passing the brief between three people. Originally from Berlin, currently based in Australia, working across European time zones. Past clients include CEEZER (carbon credit marketplace, built ground-up), Porsche Digital Campus, LAP Coffee (mobile rewards app), Parametrix (international Webflow rebuild), n8n, Conlio, CarOnSale, and Le Wagon.…Freelance product engineer — full-stack development plus the product judgment that usually sits in a separate role. _Website not available. Sign in: https://www.twine.net/signup_ Seven years building for startups across Europe and Australia. I work with founders on full-stack apps, MVPs, and Webflow sites, from first-call discovery through shipping and handoff. Stack: TypeScript, Node.js, React, React Native, Webflow. Background in business before engineering — MBA, seven years of shipping. The combination is the point: I can talk through a product call and write the code in the same conversation, instead of passing the brief between three people. Originally from Berlin, currently based in Australia, working across European time zones. Past clients include CEEZER (carbon credit marketplace, built ground-up), Porsche Digital Campus, LAP Coffee (mobile rewards app), Parametrix (international Webflow rebuild), n8n, Conlio, CarOnSale, and Le Wagon.

Available to hire

Darwin, Australia

Freelance product engineer — full-stack development plus the
product judgment that usually sits in a separate role.

Website not available. Sign in: https://www.twine.net/signup

Seven years building for startups across Europe and Australia.
I work with founders on full-stack apps, MVPs, and Webflow
sites, from first-call discovery through shipping and handoff.
Stack: TypeScript, Node.js, React, React Native, Webflow.

Background in business before engineering — MBA, seven
years of shipping. The combination is the point: I can talk
through a product call and write the code in the same
conversation, instead of passing the brief between three
people.

Originally from Berlin, currently based in Australia, working
across European time zones.

Past clients include CEEZER (carbon credit marketplace, built
ground-up), Porsche Digital Campus, LAP Coffee (mobile rewards
app), Parametrix (international Webflow rebuild), n8n,
Conlio, CarOnSale, and Le Wagon.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

German

Fluent

Work Experience

Freelance Product Engineer at Self-employed

July 15, 2019 - Present

Building full-stack platforms, MVPs, and Webflow sites for startups across Europe and Australia. I work with founders who want one person who can talk through the product call and ship the code. Stack: TypeScript, Node.js, React, React Native, Webflow. AI tooling integrated where it earns its place. Selected clients: CEEZER (carbon credit marketplace, built ground-up), Porsche Digital Campus, LAP Coffee (mobile rewards app, replacing Apple Wallet at scale), Parametrix (insurance tech, international Webflow rebuild), n8n, Conlio (freight invoicing automation), CarOnSale, Haufe Fachakademie, Le Wagon

Software Engineer at CEEZER

January 1, 2022 - December 31, 2022

Founding engineer at a B2B carbon credit marketplace. Built the core platform from the ground up alongside the founding team — backend services, marketplace logic, and the buyer-facing application. Stack: TypeScript, Node.js, React, PostgreSQL.

Software Engineer at Myos

October 1, 2019 - December 31, 2022

Designed and built microservice architecture for automating core business processes at a fintech lending platform. Continuous development of client-facing applications and the company's marketing website. Stack: TypeScript, Node.js, React, GraphQL, PostgreSQL.

Residual Value Risk Management at BMW Group

July 1, 2017 - January 31, 2019

Quantified financial impact of regulatory and political shifts on vehicle residual values for the leasing portfolio. Worked across financial modelling, risk analysis, and cross-functional reporting to senior leadership.

Advisory Financial Services at KPMG

November 1, 2014 - March 30, 2017

Supported the implementation of IFRS 9 (Impairment phase) at a large international financial institution. Worked alongside senior consultants on regulatory and accounting transformation projects.

Education

Global MBA at Reichman University (formerly IDC Herzliya)

November 1, 2020 - July 31, 2022

Two-year international MBA focused on innovation, entrepreneurship, and product strategy. Cohort drawn from global tech, finance, and consulting backgrounds. I did the program while continuing to work as a freelance developer — the combination of the two is what I now build my work around.

Full-Stack Web Development Bootcamp at Le Wagon

May 1, 2019 - July 15, 2019

Intensive nine-week, product-driven bootcamp covering Ruby on Rails, JavaScript, HTML, CSS, SQL, and full-stack application development. Final project: built and shipped a working web app in two weeks.

BSc. Business Administration at Ludwig-Maximilians-University

October 1, 2013 - March 31, 2017

Bachelor's degree in Business Administration with focus on finance, accounting, and quantitative methods. Worked part-time at KPMG throughout most of the program.