Patrick Lenert - GenAI Fullstack Freelancer

Q: Where is Patrick based?

Patrick is based in Valencia, Spain .

Q: What languages does Patrick speak?

Patrick speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Patrick have?

Patrick has at least 7 years of experience. During this time, Patrick has worked in at least 7 different roles and for 8 different companies . The average length of individual experience is 1 year and 11 months . Note that Patrick may not have shared all experience and actually has more experience.

Q: What is Patrick's latest experience?

Patrick's most recent position is GenAI Fullstack Freelancer at Palema .

Q: What companies has Patrick worked for in recent years?

In recent years, Patrick has worked for Palema , Orbit Ventures (Hays) , Ryze Digital , Servinga GmbH , and Realum.cloud GmbH .

Q: Which industries is Patrick most experienced in?

Patrick is most experienced in industries like Banking and Finance , Information Technology (IT) , and Food and Beverage . Patrick also has some experience in Retail .

Q: Which business areas is Patrick most experienced in?

Patrick is most experienced in business areas like Information Technology (IT) , Product Development , and Finance .

Q: Which industries has Patrick worked in recently?

Patrick has recently worked in industries like Banking and Finance , Information Technology (IT) , and Food and Beverage .

Q: Which business areas has Patrick worked in recently?

Patrick has recently worked in business areas like Information Technology (IT) and Product Development .

Recommended expert

Valencia, Spain

Experience

Jan 2025 - Present

1 year 2 months

Valencia, Spain

GenAI Fullstack Freelancer

Palema

Techstack: Next.js, React, Typescript, ChromaDB, Embedding Models, OpenAI API
Developed an AI-based matching system for a recruiting company for targeted candidate search in over 370,000 LinkedIn profiles
Architected Next.js frontend, ChromaDB as vector database, BGE-ICL for embeddings and GPT-4.1 for semantic search via tool calls
Automated manual pre-selection to enable finding qualified candidates in seconds
Managed three Linux Ubuntu servers for clients with open source software based on Docker containers

Sep 2024 - Dec 2024

4 months

Senior Fullstack Developer

Orbit Ventures (Hays)

Techstack: Nuxt, Vue 3, Typescript, Azure Postgres, Azure Web App Service, Azure Functions
Further developed a Nuxt web application with Vue 3 as part of an A/B testing project
Implemented three versions with random traffic distribution
Developed numerous Nuxt pages and reusable Vue components
Used Azure Postgres database and Azure Deployment Slots for efficient deployments
Implemented registration and login functionality using Nuxt and Azure
Stored page views via Azure Functions
Provided CSV exports for product manager analysis of A/B test results

Jun 2023 - Dec 2024

1 year 7 months

Mainz, Germany

AI Developer

Ryze Digital

Intelligent Chatbot Integration using React and Botpress API
Developed and deployed a context-aware AI solution using Botpress as a knowledge base engine
Created customized React components for seamless chatbot integration into the company website
Optimized chatbot response processing and state management with React hooks and Context API
Enterprise ChatGPT with LanceDB vector database integration
Customized an open-source LLM platform with React to build an enterprise-ready private knowledge management system
Developed custom connectors for Microsoft SharePoint and Confluence to extract, process and transform documentation into vector embeddings
Implemented LanceDB for efficient semantic search
AWS automation microservice for a publishing client
Designed and implemented a Node.js microservice using AWS SDK, Transfer Family, S3, EventBridge, DynamoDB and Lambda
Dockerized the microservice and parameterized AWS infrastructure with Terraform as Infrastructure as Code

Mar 2023 - Dec 2024

1 year 10 months

Vue Developer

Servinga GmbH

Techstack: Vue 3, Javascript, Vuex, Tailwind CSS
Redesigned the front end and migrated from Vue 2 to Vue 3
Developed a platform for customers to buy and manage virtual private servers easily and cost-effectively

Nov 2021 - Aug 2022

10 months

Vue / Shopware Developer

Realum.cloud GmbH

Techstack: Nuxt.js, Vue 3, Shopware 6, Shopware API
Increased sales for a chain of butcher shops by developing an immersive 3D shopping experience allowing customers to select meat products from a realistic shop counter perspective
Integrated Shopware 6 to manage product catalogues and direct customer interaction via a 3D product view
Customized and optimized Nuxt.js and Vue.js for a smooth user experience
Implemented Shopware 6 API to query and manipulate data and ensure robust, scalable product integration

May 2020 - Jul 2020

3 months

Fullstack Developer

Posterlab GmbH

Techstack: Vue, Node.js (Javascript/Typescript), CI/CD with GitLab Pipelines
Developed an MVP for a scientific poster canvas using Nuxt 3 and various AWS services

Oct 2018 - Feb 2022

3 years 5 months

Frankfurt, Germany

Fullstack Developer

Commerzbank AG

Techstack: Kotlin, Spring Boot WebMVC, JPA, Spring Boot Security, Angular 12 (Javascript/Typescript)
Focused on fullstack development with Kotlin and Angular 10
Developed backend APIs with Kotlin and Spring Boot
Hosted Docker containers in a Kubernetes cluster on Google Cloud Platform
Developed a modern, self-managed identity solution based on the Hyperledger Aries framework funded by the German Federal Ministry of Economics and Innovation

Feb 2018 - Jun 2018

5 months

Frankfurt, Germany

Backend Developer

Solactive AG

Techstack: Python, Apache Airflow, Automations, NoSQL
Automated finance team workflows using Python and Apache Airflow to reduce time spent on tedious tasks
Digitized a manual Excel process into an automated pipeline with data analysis using Pandas and Cassandra
Developed and maintained internal libraries and FTP servers

Fullstack Developer

Check24

Techstack: React, MobX, Vitest, Cypress, Bitbucket CI
Developed responsive user interfaces with React 18 and MobX
Tested tickets on up to eight screen sizes, including cell phones, tablets and desktops
Wrote unit tests and smoke tests using Vitest and Cypress

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 Banking and Finance (3.5 years), Information Technology (3 years), Food and Beverage (1 year), and Retail (1 year).

Banking and Finance

Information Technology

Food and Beverage

Retail

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 (7 years), Product Development (3.5 years), and Finance (0.5 years).

Information Technology

Product Development

Finance

Summary

As a fullstack developer with 6.5 years of professional experience, I develop AI applications with a focus on LLMs and semantic search with vector databases (RAG). MCP Server Kotlin & Spring Boot [link] RAG & Embeddings [link] React [link] Vue [link] GraphQL [link]

Skills

Llm Tooling: Langchain, Llamaindex, Open Router, Openai Tool Calling
Llm Evaluation: Ragas, Langfuse
Unit & E2e Testing: Vitesse, Playwright, Jest
Vector Databases: Chromadb, Lancedb, Qdrant, Indexing & Retrieval (Faiss / Hybrid Search)
Ci/cd With Azure And Gitlab: Build/release Pipelines, Container Deployments, Secrets Management
Vue.js With Typescript: Vue 2, Vue 3, Vuex, Pinia, Vite Bundler
Embeddings: Bge-icl, Text-embedding-3-large
Docker: Docker Compose, Containerization
React With Typescript: React 19, Next.js 15, Css-in-js

Languages

German

Native

English

Advanced

Education

Oct 2018 - Jun 2022

University Mainz

Bachelor · Computer Science · Mainz, Germany · 1.8

Certifications & licenses

HashiCorp Certified: Terraform Associate (003)

HashiCorp

Graph Developer Associate

Apollo

Corda Certified Developer

R3

AWS Cloud Practitioner

AWS

Microsoft Azure AI-900

Microsoft

Vue.js Certified Developer

Vue Academy

Profile

Created

July 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Patrick based?

Patrick is based in Valencia, Spain.

What languages does Patrick speak?

Patrick speaks the following languages: German (Native), English (Advanced).

How many years of experience does Patrick have?

Patrick has at least 7 years of experience. During this time, Patrick has worked in at least 7 different roles and for 8 different companies. The average length of individual experience is 1 year and 11 months. Note that Patrick may not have shared all experience and actually has more experience.

What roles would Patrick be best suited for?

Based on recent experience, Patrick would be well-suited for roles such as: GenAI Fullstack Freelancer, Senior Fullstack Developer, AI Developer.

What is Patrick's latest experience?

Patrick's most recent position is GenAI Fullstack Freelancer at Palema.

What companies has Patrick worked for in recent years?

In recent years, Patrick has worked for Palema, Orbit Ventures (Hays), Ryze Digital, Servinga GmbH, and Realum.cloud GmbH.

Which industries is Patrick most experienced in?

Patrick is most experienced in industries like Banking and Finance, Information Technology (IT), and Food and Beverage. Patrick also has some experience in Retail.

Which business areas is Patrick most experienced in?

Patrick is most experienced in business areas like Information Technology (IT), Product Development, and Finance.

Which industries has Patrick worked in recently?

Patrick has recently worked in industries like Banking and Finance, Information Technology (IT), and Food and Beverage.

Which business areas has Patrick worked in recently?

Patrick has recently worked in business areas like Information Technology (IT) and Product Development.

What is Patrick's education?

Patrick holds a Bachelor in Computer Science from University Mainz.

Does Patrick have any certificates?

Patrick has 6 certificates. Among them, these include: HashiCorp Certified: Terraform Associate (003), Graph Developer Associate, and Corda Certified Developer.

What is the availability of Patrick?

Patrick is immediately available full-time for suitable projects.

What is the rate of Patrick?

Patrick's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.