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