07/30/2025 updated

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ReactJS & Typescript fullstack developer

Braunschweig, Germany
Braunschweig, Germany

Profile attachments

2025-06-17.Jakob Hohlfeld Senior Softwareentwickler_en.pdf

Java (Programming Language)JavaScript (Programming Language)PHP (Programming Language)User Experience (UX)Application Programming Interfaces (APIs)Artificial IntelligenceAmazon Web ServicesAmazon CloudfrontAmazon S3Applications ArchitectureArchitectureMicrosoft AzureBig DataSoftware as a ServiceCloud ComputingCloud EngineeringCloud FoundryDatabasesContinuous IntegrationDevOpsWeb DevelopmentAmazon DynamoDBElasticsearchMiddlewareJava Platform Enterprise Edition (J2EE)Property ManagementGithubGoogle AnalyticsSearch Engine OptimizationJunitPython (Programming Language)PostgreSQLMapR (Big Data)MariaDBProject ManagementMongoDBMySQLNode.JsOpen Source TechnologyPrototypingRapid PrototypingRedisPower BIDigitaloceanNext.jsData StreamingTypeScriptSpeech RecognitionWeb PlatformsWordPressRust (Programming Language)TestingReactJSSpring-bootJupyterBackendFastapiVue.jsAmazon Relational Database ServicePytestAngularJSGitlab-ciMaterial UIKubernetesRancherFull Stack DevelopmentLow-codeFigmaGraphqlReact NativeFront End Software DevelopmentReact ReduxNestJSRestful ApiTerraformMochaDocker
Senior Fullstack Developer with 20+ years of experience in web application development and cloud-based platforms. Strong focus on React, Next.js, TypeScript, Node.js, and modern SaaS architectures.

Technical expertise covers:
  • Frontend: React, Next.js, Redux, TailwindCSS, Webcomponents, Angular, Vue, Material UI, Radix UI, Jotai, React Native, shadcn/ui
  • Backend: Node.js, Express, REST, GraphQL, NestJS, Java (Spring Boot), Python (FastAPI), PHP, Bun.sh, MeteorJS, Streaming APIs, Middleware architectures
  • Databases: MongoDB, PostgreSQL, MySQL, MariaDB, Redis, DynamoDB
  • Cloud & DevOps: AWS (Cognito, SES, Amplify, S3, Cloudfront), Terraform, Docker, CI/CD with GitHub Actions and GitLab-CI, Kubernetes, DigitalOcean, Azure, CloudFoundry, Rancher, Elastic Stack
  • Data & Tools: Open Data APIs, Map-based tooling, MapTiler, OpenStreetMap tools, deck.gl, Big Data pipelines with Rust and Node.js, PowerBI, Jupyter Notebooks, WordPress, Low-Code platforms
  • AI & Conversational: Google Dialogflow, Google Home Actions, Speech-to-Text integrations
  • Testing: Jest, vitest, Mocha, php-unit, junit, bun-test, pytest
  • UX & Prototyping: Figma, Storybook, design sprints, rapid prototyping
I design and implement scalable web platforms, from small MVPs to large enterprise projects. My recent work includes:
  • SaaS platform for real estate management (Next.js 15, AWS Cognito, PowerBI embedding, Terraform)
  • Migration of a high-traffic website to Next.js (SEO, performance, tracking, consent management)
  • Open Source travel data platform connecting multiple Open Data providers
  • Numerous frontend and backend projects for clients such as RTL, Lufthansa, Volkswagen, Zalando, and OTTO.
Used to working independently or in agile teams, I take ownership of architecture, development, CI/CD setup, and technical workshops. My focus is on building functional, maintainable solutions with modern technologies – no unnecessary complexity.

Languages

DeutschNative speakerEnglischGood

Project history

Fullstack web developer for RTL News

Netronaut GmbH

Internet & IT

< 10 team member

RTL-News: Performance Optimization & Web Development

RTL News is one of the leading news and entertainment portals in Germany, attracting millions of visitors daily. It offers a variety of content, including current news, entertainment posts, sports coverage, and lifestyle articles.
As a web developer, I have worked since 2019 as part of a team of frontend and backend developers. I was responsible for optimizing web performance, ensuring data protection compliance, and overseeing tracking and marketing. In doing so, I worked with various technologies such as TypeScript, Webpack, React, NextJS, NodeJS, PHP, and various databases.

In 2021, a major milestone was the relaunch of the RTL brand as part of the "#united" campaign. I supported various stakeholders and teams from different trades in successfully implementing the relaunch and creating a modern and user-friendly online presence for RTL News.
Project
  • Web Performance
  • Marketing
  • Data Protection
  • Web Development
  • Frontend
  • Backend
  • Microservice
  • DevOps
Technologies
  • TypeScript
  • ReactJS
  • NextJS
  • NodeJS
  • NestJS
  • PHP
  • MySQL
  • MongoDB
  • REST

Fulstack web developer for CoachHub.com

Netronaut GmbH

Industry & Mechanical Engineering

< 10 team member

CoachHub relies on Low-Code technology and modern web tools

CoachHub is a leading German startup in the field of coaching platforms, supporting companies and individuals in over 50 countries worldwide. CoachHub offers a platform for human resources development and coaching where customers can choose high-quality coaches and book individual coaching programs. The platform connects customers and coaches in a simple, user-friendly, and flexible system tailored to the individual needs and goals of each customer.
In the first subproject, we developed a proprietary CRM dashboard for CoachHub to comply with data protection regulations. We used a low-code platform, SQL databases, and NodeJS middleware to implement the dashboard and improve efficiency and scalability.

In the second subproject, I was part of a team involved in the development of a feature. This feature allowed customers to share coaching logs and give feedback. Modern web technologies such as ReactJS, TypeScript, and Docker were used in this process. The feature was a significant step to enhance the platform's user-friendliness.

Tasks & Methodologies
  • CRM-Dashboard
  • Web Development
  • Feature Development
  • Software Architecture
  • Coordination with Stakeholders and Specialist Groups
Technologies
  • Low Code
  • NodeJS
  • ReactJS
  • TypeScript
  • PostgreSQL
  • Middleware
  • Docker

BigData developer & data scientist for automotive customer

Spielraum UG

Internet & IT

< 10 team member

Big Data Platform for Vehicle Fleets

Big Data and IoT enable the collection and analysis of large amounts of data generated by sensors in a vehicle fleet. The platform can visualize and analyze time series and data points from various vehicle sensors on a map in real-time. It can be used to improve the efficiency and safety of the vehicle fleet and applied in fields such as urban services. It also allows for predictive analysis to plan and optimize future maintenance needs and costs.

As a web developer and software architect, I developed a research prototype of a Big Data platform in ReactJS that processed vehicle data with NodeJS and DynamoDB in the AWS Cloud. The platform could access a very large amount of data efficiently and present it in real-time in a web dashboard. Additionally, AI models were integrated to perform calculations based on the data. The map visualization also allowed for the evaluation of the road condition and traffic situations to enable optimized traffic planning.

Tasks & Methodologies
  • Design and implementation of a Big Data platform
  • Setting up a Big Data pipeline
  • Development of a web dashboard for data visualization
  • Performing tests
  • Optimizing the platform
  • Deploying the platform for the customer
  • Documenting the platform and the development process
Technologies
  • Big Data
  • IoT
  • ReactJS
  • NodeJS
  • DynamoDB
  • AWS Cloud

Certificates

Oracle Certified Professional Java Programmer (OCPJP)

na.

2013


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