Timm P.
Senior Architect and full-stack developer
Experience
Jan 2025 - Jul 2025
7 monthsSenior Backend-Framework Engineer
Serverpod AB
- Improved the database migration engine to handle more edge cases
- Added support for Dart record and container types in the client-server protocol and PostgreSQL data storage
- Created the next generation authentication module: overhauling the social login; adding JWT, passkey, and magic link support; supporting legacy accounts in a backwards compatible way
Dec 2023 - Dec 2024
1 year 1 monthSenior Mobile App Developer, Energy supply contract sales & PV app
TELESON Vertriebs GmbH
- Built new Flutter mobile app version replacing 2 separate Android and iOS code bases
- Added full offline support using local databases (Hive, Floor) and implementing a robust sync framework to update the server once the client regains network access
- Set up testing infrastructure and introduced CI workflows (CodeMagic)
- Sped up client development by auto-generating APIs from the spec
- Implemented on-device PDF editing workflows (filling & signing forms)
Jul 2023 - Sep 2023
3 monthsSenior Full-Stack Developer, Arabic language chat-bot app
Mawdoo3
- Built the MVP chat-bot app for the client’s custom Arabic GPT-style LLM
- Wrote the backend for the app (user management, chat history, interfacing with the gRPC ML API services), communicating with the downstream app and upstream Python-based AI backends via gRPC
- Set up CI/CD with deployments to Google CloudRun from GitHub
Dec 2021 - Jul 2022
8 monthsSenior Full-Stack Developer, video conference & collaboration app
Buzz
- Extended the cross-platform Flutter app for video conferencing, work chat, and productivity (Web & macOS, plus “always on” tool bar app)
- Replaced the single-server backend with a horizontally scalable Go backend that spoke AWS to the clients via gRPC and used PostgreSQL, Redis (including PubSub) and S3 for data storage
- Introduced CI/CD with automatic deployment to AWS Fargate/ECS
Jul 2021 - Oct 2023
2 years 4 monthsSenior Mobile Developer, fitness studio management software and end-user booking app
MySports GmbH & Magicline GmbH
- Supported the release of 3 new end-user white-label mobile apps
- Rewrote the white-label apps to share most code between them
- Technical implementation of a new UX / design system
- Taught the client’s existing team in development best practices
- Introduced automated tests to the codebase and steadily increasing coverage, ending up with a CI/CD flow
- Lead the development of the new Magicline app for studio personnel from scratch
May 2021 - Present
4 years 5 monthsVerified Senior Full-Stack Developer
Toptal, LLC
Jul 2018 - Nov 2021
3 years 5 monthsDeveloper / Ops, farm workflow-support app
DataHarvest
- Brought the app to a release-ready state
- Set up CI/CD for automatic tests (on GitLab runners), and releases with CodeMagic
- Fixed issues with native dependencies
May 2018 - Jul 2021
3 years 3 monthsHead of Architecture (Shop Applications)
ABOUT YOU GmbH
- Led the Flutter team to release a new native app written in Flutter and completed the rewrite of existing native Android and iOS apps
- Migrated code from legacy backends to new services and deployed the company’s first backend microservices using Go and gRPC
- Prototyped and kickstarted various new projects including backend systems and customizable shop applications for SaaS cloud customers
- Served as Flutter Lead Developer for mobile app and as TypeScript Senior Frontend Developer & Team Lead for mobile web, rewriting the mobile website in React and implementing PWA functionalities
- Introduced automated UI testing and optimized performance and responsiveness
- Provided consulting, technical sales, and prototyping support for SaaS/Cloud business as a contact person for backend development and architectural questions
Oct 2017 - Apr 2018
7 monthsGame Developer HTML5 Transpilation
Goodgame Studios, Altigi GmbH
- Joined the effort of porting Flash-based browser games to HTML5
- Improved tooling that automatically and continually transpiles source code from AS3 to TypeScript
- Developed Selenium-based testing setup to test the games in an automated way across a variety of real browsers
- Improved game performance by replacing slow parts in the core libraries to exceed the previous version
Sep 2015 - Sep 2017
2 years 1 monthTeam Lead UI Components
XaaSify Technologies GmbH
- Led the team that migrated a customer-facing realtime application from jQuery to React using a Flux architecture and event-based client-server communication
- Implemented a pull-request based workflow supported by CI builds to maintain common standards across the team
- Created various internal Node.js based tools for dependency management, unit testing, visual diffs, and example runner/playground
- Designed a new component-based software development architecture for major upcoming projects
Sep 2012 - Feb 2016
3 years 6 monthsCo-Founder, Software Developer
Lunados UG (haftungsbeschränkt)
- Provided custom development and consulting to help e-commerce platforms increase reach and optimize offers using competitor analysis
- Developed a fully automated system to track hotel prices on competing platforms for Germany’s biggest hotel meta-search site
- Increased organic reach by dynamically optimizing landing pages and promoting value deals with SEA campaigns
- Built an in-house tool to analyze server log files (SEO-Logalizer)
- Created internal tools to manage bus companies and routes for an international bus search site and connected over 100 external partners via inbound API and web scraping
Mar 2010 - Dec 2012
2 years 10 monthsSoftware Developer
ingsoft GmbH
- Ported the customer facing desktop application IngSoft InterWatt from Win32 to a single-page web application using Backbone.js and a HTTP API
- Implemented bi-directional data synchronization between internal and on-premise client-side Silverlight systems
- Created an Energy Savings Check app for a major Austrian energy company deployed to civilian customers
- Ported parts of the desktop app from Win32 to Microsoft WPF and added ambitious features critical for acquiring large customers
Summary
Full-stack development, to me, spans the breadth from an initial idea to a production rollout and ongoing support. While my focus is primarily on the technical design and implementation, I am capable of handling each aspect of the entire process – though specialist contributions are always welcome. Beyond the planning and programming of the actual software, I bring my expertise to the entire development workflow: how to test the product (continually and before each release), how to align deployments, how to monitor the entire running system and handle second-level support for users. Recently, I have been mostly focused on delivering mobile applications, though I am happy to apply my experience to any part of the software stack that will benefit from my contributions.
Languages
German
NativeEnglish
AdvancedEducation
Oct 2009 - Jun 2010
Friedrich-Alexander-Universität zu Erlangen-Nürnberg
Business Informatics · Erlangen, Germany
Oct 2000 - Jun 2009
Engelbert-Kaempfer-Gymnasium
General Qualification For University Entrance · Lemgo, Germany
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