Niklas Witzel

AI Engineer, Cloud Solution Architect, Backend Developer

Eichenzell, Germany

Experience

Jan 2025 - Present
7 months

AI Engineer, Cloud Solution Architect, Backend Developer

Consumer Goods

  • Generate hyperrealistic synthetic product photos in sceneries defined by user inputs
  • English - German - DALL-E - Midjourney - Large Language Models - Azure - App Service - Azure AI Services - Role Based Access Control (RBAC - Synchronous (REST API, GraphQL, WebSocket) - Container-based Architecture - Three-Layer Web Architecture - Linux - MacOS - Python - HTML - CSS - TypeScript - React - Streamlit - NextJS
Sep 2024 - Present
11 months

AI Engineer, Business Analyst, Project Manager

Banking

  • Introduce GenAI-powered solution for the creation of employee reference letters
  • Introduce RAG-powered HR Support Chatbot
  • German - English - Python - TypeScript - JavaScript - HTML - CSS - MacOS - Linux - Windows - Scrum - Jira - Confluence - Monolithic Architecture - Three-Layer Web Architecture - Synchronous (REST API, GraphQL, WebSocket) - React - Streamlit - FastAPI - NextJS - BitBucket - Docker - Visual Studio Code - MongoDB - Large Language Models - Google Gemini - Anthropic Claude - LangChain - Github Copilot - Retrieval Augmented Generation (RAG) - Qdrant - CI/CD - Load Balancing
Sep 2024 - Present
11 months

AI Engineer, Cloud Solution Architect, Backend Developer

Recruiting

  • Select suitable candidates based on project descriptions (Candidate Matching)
  • German - English - Python - CSS - HTML - TypeScript - Linux - MacOS - Three-Layer Web Architecture - Container-based Architecture - Synchronous (REST API, GraphQL, WebSocket) - Azure - App Service - Azure AI Services - Role Based Access Control (RBAC - API Management - React - NextJS - Streamlit - Terraform - GitHub - Docker - CI/CD - Visual Studio Code - Load Balancing - MongoDB - Qdrant - PostgreSQL - Large Language Models - OpenAI GPT - Retrieval Augmented Generation (RAG) - Github Copilot
Jul 2024 - Present
1 year 1 month

IT Consultant

Tensora GmbH

  • Crafting cloud solutions with modern design principles
  • Designing scalable systems using cutting-edge AI technologies
  • Assessing client needs and providing expert technology recommendations
Jul 2024 - Aug 2024
2 months

AI Engineer, Cloud Solution Architect, Backend Developer

Journalism

  • Conceptualization
  • Archtitecture consultation
  • Fullstack Software Development
  • Prompt Engineering
  • Azure DevOps
  • German - English - Python - TypeScript - JavaScript - MacOS - Linux - Three-Layer Web Architecture - Monolithic Architecture - Container-based Architecture - Synchronous (REST API, GraphQL, WebSocket) - Azure - App Service - Landing Zones - API Management - IAM - React - Streamlit - FastAPI - NextJS - Terraform - GitHub - Docker - CI/CD - Visual Studio Code - Qdrant - Large Language Models - OpenAI GPT - Anthropic Claude - Github Copilot - LangChain - Huggingface
Sep 2023 - Jun 2024
10 months

Lead Cloud Solution Architect, Fullstack Developer, DevOps

E-Commerce

  • Structured architecture analysis of the status quo
  • Identification of risks and potentials
  • Development of a target architecture and detailed planning of the transformation process under consideration of complex system requirements
  • General cloud consulting and training
  • German - English - Java - JavaScript - (No)SQL - Linux - Windows - Scrum - Jira - Confluence - Microservice Architecture - SOAP - Three-Layer Web Architecture - Event-driven Architecture - Container-based Architecture - Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus) - Synchronous (REST API, GraphQL, WebSocket) - AWS - GCP - EC2 - CloudTrail - API Gateway - ECS - Xray - RDS - EKS - Route53 - DynamoDB - S3 - IAM - SES - Lambda - CloudWatch - VPC - Kubernetes Engine - BigTable - Compute Engine - BigQuery - Cloud Functions - Analytics - Cloud Storage - Spring Framework - Spring Boot - Terraform - CloudFormation - GitHub - Docker - Kubernetes - CI/CD - IntelliJ - Visual Studio Code - PostgreSQL
Oct 2022 - Sep 2023
1 year

Lead Cloud Solution Architect, Fullstack Developer, DevOps

E-Commerce

  • Design and detailed planning of the AWS-based native cloud architecture
  • Technical coordination of development phases
  • Test management
  • Implementation of a Spring Boot REST API
  • Implementation of AWS Lambda functions based on Java
  • German - English - Java - Python - JavaScript - (No)SQL - Windows - Linux - Scrum - Jira - Confluence - SER Doxis Suite - Microservice Architecture - Three-Layer Web Architecture - Event-driven Architecture - Container-based Architecture - Synchronous (REST API, GraphQL, WebSocket) - Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus) - AWS - EC2 - API Gateway - CloudTrail - ECS - RDS - Xray - EKS - DynamoDB - Route53 - S3 - IAM - SES - Lambda - CloudWatch - VPC - Spring Boot - Spring Framework - Terraform - GitHub - Docker - CI/CD - IntelliJ - Visual Studio Code
Apr 2022 - Jun 2024
2 years 3 months

IT Consultant

cimt ag

  • Process Automation of complex business processes
  • Engineering of Cloud Microservices
  • Cloud Transformation
  • Assessing client needs and providing expert technology recommendations
  • Internal consulting on generative AI technology and potentials
Apr 2022 - Oct 2022
7 months

Cloud Solution Architect, Fullstack Developer

Financial Services

  • Support for business and technical modeling of business processes using BPMN and DMN
  • Automation of business processes using Camunda embedded in a Spring Boot / Java project
  • Planning and implementation of interfaces and backend processes in the AWS cloud (SNS/SQS)
  • Implementation of an own Camunda frontend based on mockups with Vue.JS and GraphQL
  • Infrastructure as Code (IaC) with Terraform
  • Technical coordination of development phases
  • Test Management
  • English - German - Java - HTML - CSS - JavaScript - TypeScript - (No)SQL - Linux - Windows - Scrum - Confluence - Jira - Microservice Architecture - Three-Layer Web Architecture - Event-driven Architecture - Container-based Architecture - Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus) - Synchronous (REST API, GraphQL, WebSocket) - Camunda 7 / 8 Framework - BPMN & DMN - AWS - ECS - S3 - Lambda - CloudWatch - IAM - DynamoDB - API Gateway - Route53 - VPC - React - Spring Framework - Spring Boot - NextJS - Terraform - GitHub - Docker - CI/CD - IntelliJ - Visual Studio Code - PostgreSQL - MongoDB - Prometheus - Grafana - Splunk - Kibana - Logstash
Jan 2021 - Mar 2023
1 year 3 months

Founder

Niklas Witzel Software Development

  • Freelancing
  • Web & App Development
  • Cloud Development
  • Programming Coach and Lecturer
Aug 2021 - Apr 2022
9 months

Fullstack Developer

E-Commerce

  • Planned and implemented automatic crawling of an ecommerce web shop
  • Planned and implemented further analytics of the crawling results
  • Python - Java - Windows - Linux - Jira - Kanban - Confluence - Monolithic Architecture - Synchronous (REST API, GraphQL, WebSocket) - GCP - Compute Engine - Cloud Functions - BigTable - Cloud Storage - GitLab - Huggingface - Jupyter Notebooks - Google Colab - PostgreSQL - Pandas - NumPy
Aug 2020 - Aug 2021
1 year 1 month

Data Scientist

E-Commerce

  • Marketing-Mix-Modeling
  • Recommendation Engine
  • A/B Testing
  • English - German - Python - Linux - Windows - Scrum - Confluence - Jira - GCP - Compute Engine - Cloud Functions - BigTable - BigQuery - Analytics - VPC - IAM - Kubernetes Engine - Cloud Storage - GitLab - Kubernetes - PostgreSQL - MongoDB - Grafana - Prometheus - Jupyter Notebooks - Google Colab - NumPy - Pandas - Matplotlib - SciPy - Scikit-learn - Statsmodels - Seaborn - TensorFlow - PyTorch - Keras - YOLO - OpenCV - Huggingface
Aug 2019 - Aug 2020
1 year 1 month

App Developer

E-Commerce

  • Further Development of the companies Android native shopping app
  • Planning, Design and Implementation of new features
  • German - English - Java - Kotlin - HTML - CSS - Linux - Windows - Kanban - Jira - Confluence - Monolithic Architecture - Three-Layer Web Architecture - Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus) - Synchronous (REST API, GraphQL, WebSocket) - Android Framework - Jetpack Compose - GitLab - Android Studio - OracleDB - MongoDB
Aug 2019 - Dec 2020
5 months

Fullstack Developer

E-Commerce

  • Further Development of the companies internal reporting system
  • Planning, Design and Implementation of new features
  • German - English - Java - (No)SQL - HTML - CSS - Windows - Linux - Scrum - Jira - Confluence - Microservice Architecture - Three-Layer Web Architecture - Monolithic Architecture - Event-driven Architecture - Container-based Architecture - Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus) - Synchronous (REST API, GraphQL, WebSocket) - Vaadin - Thymeleaf - Spring Boot - Spring Framework - GitLab - IntelliJ - OracleDB - Redis - ElasticSearch - Teradata - Apache Flink - Apache Spark - Logstash - Kibana
Aug 2018 - Apr 2022
3 years 9 months

Software Developer

bonprix Handelsgesellschaft mbH

  • Academic Studies & Working in Applied Informatics
  • Web & App Development
  • Cloud Development
  • Data Science
  • SEO, SEA and SEM activities
Aug 2018 - Aug 2019
1 year 1 month

Fullstack Developer

E-Commerce

  • Further Development of the companies internal purchasing systems
  • Planning, Design and Implementation of new features
  • English - German - Java - Kotlin - HTML - CSS - Windows - Linux - Scrum - Jira - Confluence - Monolithic Architecture - Three-Layer Web Architecture - Synchronous (REST API, GraphQL, WebSocket) - Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus) - Vaadin - Thymeleaf - Spring Framework - Spring Boot - Velocity - GitLab - Docker - IntelliJ - OracleDB - Splunk
Aug 2016 - Jul 2018
2 years

Fullstack Developer

Diverse

  • Planning, design and implementation of diverse corporate websites utilizing Joomla CMS system
  • Development of responsive templates for Joomla CMS system
  • German - English - JavaScript - HTML - CSS - PHP - (No)SQL - Windows - Linux - Three-Layer Web Architecture - Synchronous (REST API, GraphQL, WebSocket) - Joomla - Wordpress - GitLab - GitHub - Visual Studio Code - PHPStorm - WebStorm - Eclipse - PostgreSQL - MariaDB - MySQL

Summary

  • Areas of Expertise: Cloud Solution Architecture & Development (AWS, GCP, Azure), Front- & Backend Development, DevOps, Data Science, Large Language Models, Process Automation, Web Development, Generative AI, Artificial Intelligence, Business Analysis, App Development
  • Skills - Programming Languages: Java, Python, Kotlin, JavaScript, TypeScript, (No)SQL, HTML, CSS, C#, PHP
  • Skills - Operating Systems: Linux, Windows, MacOS
  • Skills - Project Management: Scrum, Kanban, Jira, Confluence
  • Skills - Document Management: SER Doxis Suite
  • Skills - Solution Architecture: Microservice Architecture, SOAP, Three-Layer Web Architecture, Monolithic Architecture, Event-driven Architecture, Container-based Architecture
  • Skills - Service Communication: Synchronous (REST API, GraphQL, WebSocket), Asynchronous (Kafka, RabbitMQ, MQTT, SNS / SQS, PubSub, ServiceBus)
  • Skills - Process Automation: BPMN & DMN, Camunda 7 / 8 Framework
  • Skills - Cloud Platforms: AWS, Azure, GCP
  • Skills - Cloud Development (AWS): EC2, ECS, EKS, S3, Lambda, API Gateway, RDS, DynamoDB, IAM, CloudWatch, CloudTrail, Xray, Route53, SES, VPC
  • Skills - Cloud Development (Azure): AIS, Data Factory, Logic Apps, Function Apps, API Management, Eventgrid, Eventhub, ServiceBus, Landing Zones, IAM, App Service, Azure AI Services, Role Based Access Control (RBAC, Graph API
  • Skills - Cloud Development (GCP): Kubernetes Engine, Compute Engine, Cloud Functions, IAM, Cloud Storage, BigTable, BigQuery, Analytics, VPC
  • Skills - App Development: Android Framework, Jetpack Compose, React Native
  • Skills - Web Development: Angular, Vaadin, React, Thymeleaf, Streamlit, Spring Framework, NodeJS, FastAPI, Velocity, Spring Boot, NextJS, Joomla, Wordpress
  • Skills - DevOps / Dev Tooling: Terraform, CloudFormation, GitHub, GitLab, BitBucket, Docker, Kubernetes, CI/CD, IntelliJ, Visual Studio Code, Android Studio, Eclipse, WebStorm, PHPStorm, Jupyter Notebooks, Google Colab, Huggingface, Load Balancing
  • Skills - Databases: PostgreSQL, MariaDB, MySQL, MongoDB, Qdrant, OracleDB, Redis, ElasticSearch, Teradata, Apache Flink, Apache Spark
  • Skills - Observability: Logstash, Kibana, Splunk, Grafana, Prometheus
  • Skills - Generative AI: Large Language Models, OpenAI GPT, Google Gemini, Anthropic Claude, Mistral, LangChain, Github Copilot, Midjourney, DALL-E, Retrieval Augmented Generation (RAG)
  • Skills - Data Science: NumPy, Pandas, Matplotlib, SciPy, Scikit-learn, Keras, PyTorch, TensorFlow, Seaborn, Statsmodels, OpenCV, YOLO

Languages

German
Native
English
Advanced

Education

Oct 2022 - Nov 2024

NORDAKADEMIE Graduate School Hamburg

Master of Science, Applied Data Science · Applied Data Science · Hamburg, Germany

Aug 2018 - Mar 2022

NORDAKADEMIE Elmshorn

Bachelor of Science, Applied Information Technology · Applied Information Technology · Elmshorn, Germany

Aug 2016 - Jul 2018

Konrad Zuse Schule Hünfeld

Technical Baccalaureate, Information Technology · Information Technology · Hünfeld, Germany