You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Ole RummelOR

Ole Rummel

Web/Frontend Developer

€800/day
Berlin, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Ole

10+ years of experience in building modern web applications – from solo projects to product development at slon.gmbh, a company I co-founded and which received EXIST funding.

I particularly enjoy transforming complex, training-intensive, and often outdated specialized software into contemporary, intuitively usable applications. As a developer and entrepreneur, I bring not only technical expertise but also profound knowledge in product development, process optimization, and project management.

How I Advance Your Business:

  • Legacy Modernization:Migration of outdated specialized software into modern web applications – without loss of functionality, with significantly increased user acceptance.
  • Custom Web Solutions:Development of performant and scalable applications with a focus on user-friendliness.
  • Holistic Approach:Support from concept and development to deployment and maintenance.
  • Agile and Reliable:Flexible adaptation to your requirements, clear communication, on-time delivery.
  • More Than Just Code:Consulting and optimization in testing, project management, and UI/UX.

Technology Stack

Languages:JavaScript/TypeScript, PHP, Python, Ruby, HTML, CSS / SCSS, Bash

Frontend:Single-Page Applications with Angular and React, Native Apps with React Native, classic websites with HTML/CSS, server-side rendering with PHP

Backend Development:API Development (REST/GraphQL), Node.js, SQL, NoSQL

Platforms:Shopify (including theme development), WordPress

Testing:Cypress, Spectator, Jest, Vitest, Maestro

Project Management:GitHub Issues & Projects, JIRA, Trello

Let's Talk


Do you have a project in mind or software that has become outdated? Write me briefly about it – I will get back to you within 24 hours with an initial assessment.
  • German

    Native or bilingual

  • English

    Fluent

  • Italian

    Basic

  • French

    Basic

Can work on-site
Berlin (up to 50km)

Experience

  • Gut Kerkow Fleischmanufaktur GmbH
    Shopify Online Store gut-kerkow.de
    AGRICULTURE
    September 2023 - May 2024 (9 months)
    Angermünde, Germany
    During this project, a Shopify store for selling groceries, especially meat products, was redeveloped and equipped with both a custom shop theme and custom Shopify plugins to implement company-specific business structures.

    My responsibilities included:
    • Process Management: Analysis of requirements and creation of a detailed project plan.
    • Training the client's team on the use of GitHub Projects and GitHub Issues
    • Implementation of a custom Shopify plugin to fulfill specific requirements of the business
    • Setup and customization of a shop theme
    • Implementation of end-to-end tests to ensure software quality
    • Conception and setup of a staging system for executing automated tests
    Shopify Themes Shopify Apps Github Actions GitHub
  • Fachhochschule Potsdam – University of Applied Sciences
    Development of slon.app – the digital employee for animal care businesses
    PUBLIC SECTOR
    January 2019 - December 2019 (1 year)
    Michendorf, Germany
    As part of the EXIST research grant, the administrative software slon.app was developed for animal care businesses such as dog kennels, daycare centers, and shelters.

    The project led to the founding of slon GmbH, a company whose business I still co-manage equally with the other two founders.

    During the project, my responsibilities included:
    • Development of the UI framework 'bark'
    • Development of the UI with Angular and 'bark'
    • Implementation of automated tests (unit, integration, and end-to-end tests) to ensure software quality and early error detection
    • Support of backend development with Node.js and Express.js using TypeORM
    • Project management with Github Issues and Zenhub
  • Kinderstube Abeona e.V.
    Finance and Treasurer
    CIVIC AND SOCIAL ORGANIZATIONS
    July 2016 - July 2020 (4 years and 1 month)
    Berlin, Germany
    In the non-profit association I co-founded, I handled financial planning and calculation, as well as payroll accounting on a voluntary basis for the first 4 years.

Recommendations

Be the first to recommend Ole

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • Diplom Mathematics
    Freie Universität Berlin
    2014

Skill set

Categories