Hey, I'm Stefan Trost
Fullstack & Mobile Developer
Currently located in Stuttgart
Skilled and experienced in designing, planning, developing and deploying scalable web and mobile applications. From your initial idea to a scalable product.
About me
Why hire me for your
Next Project
As a developer with more than 8 years of professional experience, I'm specialized in the design, planning, development and deployment of front-end and mobile applications. My skill set includes technologies such as React, React-Native, TypeScript, JavaScript, Cloud (Firebase, GCP, AWS), Node.js and more. I am fascinated by technologies and their possibilities and highly motivated to leverage it to deliver customer and business value.
Reviews
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What my clients say about me
13. Juni 2024
Stefanie Laharnar
I highly recommend working with Stefan! We hired him to help out a squad that was temporarily down 1 person. He fit right in and easily understood our complex setup with micro frontends. The last few weeks he contributed a lot of code to our setup and was able to automate our release process for us. Amazing work. Main technologies he worked with: React.js, Typescript, single-spa (micro frontends), github actions.
read more - Stefanie Laharnar's full recommendation on LinkedIn
read more - Stefanie Laharnar's full recommendation on LinkedIn
27. Februar 2024
John Belcher
... Stefan was extremely helpful in every step in the process to guide the development, help with troubleshooting, and then build a GitHub repository for me to run the function on my own.I would highly recommend Stefan to anyone looking for a competent developer with a great work ethic and attitude.
read more - John Belcher's full recommendation on LinkedIn
read more - John Belcher's full recommendation on LinkedIn
20. Januar 2024
Roman Levi Renn
... Egal bei welchen Projekten, er beachtet alle Anforderungen und kann auch komplexe Thematiken schnell begreifen, lösen sowie umsetzen. Auch die Zuverlässigkeit und Verfügbarkeit bei dringenden Angelegenheiten ist Stefan immer erreichbar und kann sofort unterstützen. Ich kann ganz klar sagen, dass wir viele Projekte ohne Stefans Hilfe nicht so umgesetzt bekommen hätten ...
read more - Roman Levi Renn's full recommendation on LinkedIn
read more - Roman Levi Renn's full recommendation on LinkedIn
18. Januar 2024
Mark Wightman
... Stefan delivered a robust and scalable foundation for our web app, which has become a vital part of our platform. His technical expertise, problem-solving skills, and team player attitude made him a true asset. I highly recommend Stefan to anyone seeking a talented and reliable contractor for their web development needs ...
read more - Mark Wightman's full recommendation on LinkedIn
read more - Mark Wightman's full recommendation on LinkedIn
17. März 2023
Roland Trost
Die Zusammenarbeit mit Stefan war immer hervorragend und zielführend. Er besticht durch seine profunde IT-Kenntnisse, seinem unternehmerischen Denken und seiner Problemlösungskompetenz. Ob in seinen Kernkompetenzen wie Webentwicklung, Automatisierung oder IT-Architektur oder in neuen Themenfeldern – seine schnelle und erfolgreiche Einarbeitung aufgrund seiner tiefen IT-Kenntnisse hat stets meine Zufriedenheit gewährleistet. Ich kann Ihn uneingeschränkt weiter empfehlen.
read more - Roland Trost's full recommendation on LinkedIn
read more - Roland Trost's full recommendation on LinkedIn
18. Januar 2023
Emir Cuk
Die Zusammenarbeit mit Stefan war stets eine Bereicherung. Er versteht es komplexe IT-Probleme zu lösen und zukunftsweisende Lösungen zu bieten. Ein Kollege, welcher nicht nur stets ein offenes Ohr für technische Herausforderungen hatte, sondern auch drüber hinaus. Stefan kommt meine uneingeschränkte Empfehlung zu.
read more - Emir Cuk's full recommendation on LinkedIn
read more - Emir Cuk's full recommendation on LinkedIn
8. Dezember 2023
Andrew Snyder
... As a Technical Lead, Stefan played a pivotal role in driving the team's success. He demonstrated proficiency in technologies such as ChatGPT, React Native, and Amazon Web Services (AWS). Stefan's leadership in IT architecture and Full-Stack development was instrumental in the successful execution of projects.Beyond technical excellence, Stefan actively engaged in coaching and mentoring team members. He created a collaborative and learning-oriented environment that significantly contributed to the professional growth of the team...
read more - Andrew Snyder's full recommendation on LinkedIn
read more - Andrew Snyder's full recommendation on LinkedIn
Skills
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Check out some of my skills where i am good at
Experience
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- 2014 - present
2014 - present
Senior Fullstack Developer & IT-Consultant
Self-employedshow more
- Led multiple full-stack projects from concept to production
- Transformed client business requirements into scalable technical solutions
- Consulted clients on selecting the right technologies for their specific needs.
- Mentored junior developers, sharing knowledge and guiding their professional growth.
- Played a key role in the recruitment of developers, ensuring a skilled and cohesive team.
- Developed robust web applications, aligning with client's business goals and user needs.
- Crafted high-quality mobile applications, focusing on performance and user experience.
- Designed and implemented cloud infrastructures, primarily using AWS and Google Cloud.
- Planned and built applications from scratch, focusing on scalable and maintainable code.
- Established deployment pipelines, streamlining the release process for applications.
- Integrated automatic testing into development cycles, enhancing software reliability.
ReactReact NativePythonJavaScriptAWS (Amazon Web Services)Google Cloud PlatformFirebaseHTMLCSSWordPressTypeScriptLeadershipStrategic PlanningProblem SolvingCommunicationProject ManagementTeam BuildingInnovative ThinkingAdaptabilityContinuous Learning - Oct 2024 - May 2025
Oct 2024 - May 2025
Senior Fullstack Developer
Blaulichtschule | LawGames GmbH | Gauting, Germanyshow more
- Enhanced internal app search functionality, boosting response times by 93% for end-users.
- Developed an interactive AI bot enabling users to effectively learn legal definitions.
- Engineered an AI tutor leveraging innovative AI and RAG technology to query over 22,000 documents for qualified legal answers.
- Optimized overall application performance through targeted refactoring and improvements.
- Contributed significantly to the UI/UX design and development of the React Native application.
- Managed and maintained the Google Cloud Platform infrastructure, including setting up and deploying VMs, configuring and managing Cloud Run services, and implementing load balancing and backup strategies.
- Architected and implemented a comprehensive CI/CD pipeline, slashing release times by two-thirds by introducing distinct development, testing, and production environments and enabling automated app store deployments.
- Played a key role in the planning and architectural design for new application features.
JavaScriptTypeScriptPythonReact NativeAILLMsRAGFirebaseLangchainChatbotsPortkey.aiChatGPT ApiGoogle Cloud PlatformCI/CDDeployment AutomationBitriseApp Store DeploymentArchitectural DesignUI/UX Design - Mar 2024 - Jul 2024
Mar 2024 - Jul 2024
Senior Fullstack Developer
Plana Earth GmbH | Berlin, Germanyshow more
- Developed responsive micro-frontend with modern single-spa architecture
- Implemented comprehensive test suite using test-driven development
- Improved the frontend architecture
- Collaborated with cross-functional teams, including frontend, backend, data, design, and product, to make pragmatic decisions and contribute to technology and architecture decisions
- Improved the release process by introducing multiple CI/CD pipelines to automate the deployment process
JavaScriptTypeScriptReactMicro-frontendsingle-spaSASSJestUnit TestsTestingCSSHTMLConfluenceJira - Feb 2024 - Mar 2024
Feb 2024 - Mar 2024
Cloud & Backend Developer
BERP LLC | Detroit, USAshow more
- Advising the customer on the design of a suitable technical solution for their underlying business use case
- Set up Google Cloud Platform environment / permissions / CI/CD
- Development of a private Hubspot Application for secure API access
- Development of a cloud function with Google Cloud Platform to fetch, compare and filter data from the Hubspot API and Google BigQuery
- Automatically synchronize the data between the distributed system
- Set up automatic deployments to Google Cloud Platform
JavaScriptTypeScriptNode.jsGoogle Cloud PlatformGoogle Cloud FunctionsCI/CDGoogle BigQuerySQLHubspot APIREST APIBackend DevelopmentIT ConsultingOAuth - Jan 2023 - Dec 2023
Jan 2023 - Dec 2023
Technical Lead
Caster LLC | New York, USAshow more
- Lead the design and planning of IT infrastructure, focusing on technology selection, scalability, and future-proofing.
- Onboard junior developers and provide mentorship to improve their coding and problem-solving skills
- Delegate tasks based on skill levels and conduct code reviews.
- Research new emerging technologies to assess their potential impact on business cases
MentoringTypeScriptIT InfrastructureAmazon Web Services (AWS)Google Cloud PlatformLangchainChatGPT ApiLLMsCode ReviewsTeam Management - Jun 2022 - Dec 2022
Jun 2022 - Dec 2022
Senior Fullstack Developer
Caster LLC | New York, USAshow more
- Conceived and planned a scalable app and backend infrastructure
- Developed a mobile application in React Native
- Refactored parts of the existing application to decrease code complexity and improve performance.
- Implemented a JWT authentication flow for Firebase Auth and Hasura.
- Introduced a UI styling system with Storybook, RNUI, and Zeplin.
- Implemented a backend consisting of Hasura, PostgreSQL deployed to an AWS infrastructure
- Created the CI / CD pipeline for automated testing and app store deployment
JavaScriptTypeScriptReact NativeLangchainChatGPT ApiLLMsGoogle Cloud PlatformFirebaseAWSAWS LambdaCI/CDBitriseGraphQLHasuraPostgreSQLReduxRedux-ToolkitInvisionAuth0ZeplinStorybook - April 2022 - Jun 2022
April 2022 - Jun 2022
Senior Frontend Developer for a svelte project
Aluma Technologies Ltd. | Cambridge, UKshow more
- Developed a web application from scratch to manage and process intelligent document workflows.
- Integrated PDFTron for previewing, annotating, editing, and navigating PDF documents.
- Implemented a component library with Tailwind CSS.
- Handled the implementation of automated unit and E2E tests using Jest, Testing Library, and Playwright.
SvelteJavaScriptTypeScriptPlaywrightJestStorybookSvelteKitPDFTronPDFTailwindCSS - Mar 2021 - Mar 2022
Mar 2021 - Mar 2022
Software Developer
Inovex Gmbh | Stuttgart, Germanyshow more
- Provided development and testing support for a hybrid React Native mobile application in the eHealth space.
- Led the transition from JavaScript to TypeScript to refactor the old application.
- Developed and tested the React web application for a eHealth product.
- Created the conceptual design and implemented the CI/CD pipeline.
TypeScriptJavaScriptReactReact NativeDockerJestCypressGitCodeshipBitbucketRESTXcodeFront-endMobile App DevelopmentHTMLCSSRedux - Mar 2021 - present
Mar 2021 - present
Fullstack Developer
Mymories | Stuttgart, Germanyshow more
- Planned, conceived, and created the backend and frontend architecture for a scalable image sharing application.
- Implemented the serverless backend architecture with Google Cloud and Firebase
- Developed the React web application and the React-native mobile application
- Planned, conceived, and implemented the full CI/CD process including versioning, testing, E2E, and deployment to the stores.
ReactReact NativeTypeScriptJavaScriptBitriseFirebaseGoogle Cloud PlatformXcodeFirestoreFront-endHTMLCSSJestGitGithub ActionsDockerDetoxReduxNodejs - Oct 2018 - Mar 2020
Oct 2018 - Mar 2020
Frontend Developer
Fraunhofer-Institut für Produktionstechnik & Automatisierung IPA | Stuttgart, Germanyshow more
- Conceived, planned, and developed a web application to support the production process and knowledge management.
- Continued development and support of an Android app to support knowledge management.
- Managed and led a team of students in the implementation of a task and coordinated and reviewed their progress to ensure timely completion and high-quality output.
ReactReduxOauthGitAngularAndroid SDKKotlinDockerJenkinsRESTJavaScriptReactFront-endHTMLCSSScrum
