Jewgenij (Jeff) Steinhart
Mobile Engineer
Experience
Mobile Engineer
ginlo.net Gesellschaft für Datenkommunikation mbH
- Development of the ginlo Messenger client, emphasizing stringent data protection compliance as mandated by German legislation.
Full Stack Development
The Mobility House GmbH
- Development of a mobile app for smart charging of electric vehicles
- Agile development in a cross functional team
- Frontend development and deployment of a multi-platform Flutter application
- Backend development in a microservice architecture
- Improvements in customer journey from registration throughout all stages of interactions with the app
Backend + Frontend Development
typedigital
- Implementing new application
- User notifications via WebSocket
- Appointments and calendar features
- New UI with Native Base and Storybook
- Implementing backend APIs and database models
Volunteer Teacher
ReDi School of Digital Integration
- Teaching technologies to students with migrant background
- Lego Mindstorms robots programming
- Python block coding with edublocks.org
Development, Quality Management
Porta Möbel / foobar Agency
- Testing strategy development
- Components implementation
- On-site search improvement with Algolia
- Features for product promotion
Development, Quality Management
Porta Möbel / foobar Agency
- Testing strategy development
- Components implementation
- On-site search improvement with Algolia
- Features for product promotion
Full Stack Developer
foobar Agency
- Components implementation
- CMS API consumer implementation
- Knowledge transfer, new developer onboarding
- Best practice establishment
- Technology experimentation
Full Stack Developer
Mayflower GmbH
- Implement software for digital conferencing
- Implementing logic and layout for different formats of conference sessions
Full Stack and Mobile Engineer
Stealth Startup
- Cross-platform app for streaming smartphone display to E-Book readers Amazon Kindle and Kobo
- Image optimizations for black/white E-Ink screens
- Performance enhancing for lag free picture streaming
Volunteer Teacher
ReDi School of Digital Integration
- Teaching technologies to students with migrant background
- Lego Mindstorms robots programming
- Python block coding with edublocks.org
Software Engineer Frontend
Media-Saturn IT-Services GmbH
- New shop basket technology
- Checkout process upgrade
- API migration to GraphQL
Software Engineer
weeConomy AG
- Software design and development of a new frontend application for wee.com with React and Redux
- Components implementation
- Techstack decisions
- Workflow design
- Clean code and best practices establishment
Entrepreneur in Residence, Participant
Entrepreneur First
- Startup ideas research
- Prototyping
Blockchain Engineer
Blockshifters GmbH
- Development of the decentralised cryptoassets trading platform CryptoBridge
- Integration of Ethereum and ERC20 assets
- Development of wallets for deposits of Ethereum based assets
- Development of the software architecture supporting Ethereum blockchain on the exchange
- Establishment and securing of cold and hot wallets
Full Stack Web Developer
SinnerSchrader AG
- Further development of Volkswagen’s Car Configurator
- Integration of new APIs
- Styling of the components
- Adaptation of the business logic to changed legal requirements
- Visualisation of the EMI rating for clients
Full Stack Web Developer
DriveNow GmbH & Co. KG
- Development of a building blocks system for landing page for the department of performance marketing
- Further development of the drive-now.com website in responsive design
- Extension of the software middle layer (RESTful API) in Go programming language
- Coordinating requirements with stakeholders from product and marketing
Full Stack Web Developer
Xing AG
- Support of frontend architecture and messenger teams
- Further development of the UI style guide
- Creation of responsive GUI components with React
- Further development of internal software libraries and tools
- Consultation with stakeholders
Full Stack Web Developer
Maxdome GmbH / ProSiebenSat.1 Media SE
- Relaunch of the Maxdome platform
- Implementation of new responsive UI
- Migration of legacy code
- Realisation of a service-oriented architecture
Full Stack Web Developer
WEKA FACHMEDIEN GmbH
- Further development of the editorial backend for connect.de and pc-magazin.de
- Support of editors in the merger of two legacy editorial systems
- Implementation of multi role capability of the editorial system / split features
- Specification and implementation of feature requests for stakeholders from editorial departments
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Education (4 years), Information Technology (3 years), Retail (1.5 years), Automotive (1 year), Media and Entertainment (1 year), and Energy (0.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (8.5 years), Product Development (4.5 years), Quality Assurance (1 year), and Marketing (0.5 years).
Summary
As a seasoned senior software engineer, I excel in crafting sophisticated applications for both web and mobile platforms. My proficiency spans across the modern Full Stack JavaScript ecosystem — encompassing React.js, TypeScript, and Node.js — complemented by my expertise in Flutter with Dart for compelling cross-platform mobile app development.
With a deep understanding of Agile and Scrum methodologies, I flourish in team environments, championing collaboration and efficiency. My comprehensive skill set equips me to address a broad spectrum of development challenges with confidence and expertise.
Skills
Agile Software Development And Scrum Methodologies
Expertise In Software Design Patterns And Architecture
Interdisciplinary Thinking And Problem-solving Skills
Strong Curiosity And Motivation To Continuously Learn And Improve
Conceptual Thinking And Ability To Develop Practical Solutions
Strong Communication Skills For Requirement Analysis And Project Conception
User-focused Design And Development Approach To Ensure A Seamless User Experience.
Flutter
Dart
Javascript
React.js
React Native
Node.js
Typescript
Next.js
Nest.js
Aws
Redux
Mobx
Graphql
Mysql
Postgresql
Html5
Css3
Web3
Git
Swift/ios
Kotlin/android
Scrum
Agile
Languages
Education
Augsburg University of Applied Sciences
Diploma in Business Information Systems · Business Information Systems · Augsburg, Germany
Profile
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