Collin Kempkes - Lead Fullstack Developer

Q: Where is Collin based?

Collin is based in Kempen, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Collin speak?

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

Q: How many years of experience does Collin have?

Collin has at least 11 years of experience. During this time, Collin has worked in at least 4 different roles and for 4 different companies . The average length of individual experience is 2 years and 3 months . Note that Collin may not have shared all experience and actually has more experience.

Q: What is Collin's latest experience?

Collin's most recent position is Lead Fullstack Developer at Freelance .

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

In recent years, Collin has worked for Freelance , EquityBytes IUGmbH , and freeyou AG .

Q: Which industries is Collin most experienced in?

Collin is most experienced in industries like Insurance and Information Technology (IT) .

Q: Which business areas is Collin most experienced in?

Collin is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence . Collin also has some experience in Operations and Quality Assurance (QA) .

Q: Which industries has Collin worked in recently?

Collin has recently worked in industries like Information Technology (IT) and Insurance .

Q: Which business areas has Collin worked in recently?

Collin has recently worked in business areas like Information Technology (IT) , Product Development , and Business Intelligence .

Recommended expert

Kempen, Germany

Experience

Jan 2023 - Present

3 years 2 months

Lead Fullstack Developer

Freelance

Developing cloud native applications to provide a multi-vendor marketplace for various digital assets (e.g., NFTs)
Designing and operating a microservice architecture using Nest.js, MySQL, Redis, Hasura, Algolia, Docker, and Serverless
Designing and operating a streaming data architecture using Kafka (with JSON Schemas)
Building CI/CD pipelines with GitHub Actions for automated application deployment
Testing and evaluating new technologies for more stable, faster, secure, and sustainable application development
Setting up the entire infrastructure with Terraform on AWS
Integrating Stripe to handle international payments
Using Algolia for real-time search of digital assets on the platform
Presenting results to stakeholders and hosting internal meetups
Federating services with GraphQL and Hasura
Discussing architecture decisions for the IT landscape and their impact
Using message queues for in-app communication and component encapsulation
Advising internal staff on implementing business and technical requirements
Test-driven development: unit, integration, and end-to-end testing using JUnit
Using Next.js/React with SASS/SCSS for frontend applications
Using Vue.js with SASS/SCSS for frontend applications
Integrating security mechanisms (JWT tokens with Auth0, OAuth, OIDC, IP guards, BOLA, secret vaults)
Creating microfrontends with Retool for rapid prototyping and functionality testing
Using nx monorepo with nrwl

Mar 2022 - Dec 2022

10 months

Software Architect / Fullstack Developer

EquityBytes IUGmbH

Developing cloud native applications to provide a multi-vendor marketplace for various digital assets (e.g., NFTs)
Designing and operating a microservice architecture using Nest.js, MySQL, Redis, Hasura, Algolia, Docker, and Serverless
Designing and operating a streaming data architecture using Kafka (with JSON Schemas)
Building CI/CD pipelines in Bitbucket for automated application deployment
Testing and evaluating new technologies for more stable, faster, secure, and sustainable application development
Setting up the entire infrastructure with Terraform on AWS
Integrating Stripe to handle international payments
Using Algolia for real-time search of digital assets on the platform
Presenting results to stakeholders and hosting internal meetups
Federating services with GraphQL and Hasura
Discussing architecture decisions for the IT landscape and their impact
Using message queues for in-app communication and component encapsulation
Advising internal staff on implementing business and technical requirements
Test-driven development: unit, integration, and end-to-end testing using JUnit
Using Next.js/React with SASS/SCSS for frontend applications
Using Vue.js with SASS/SCSS for frontend applications
Integrating security mechanisms (JWT tokens with Auth0, OAuth, OIDC, IP guards, BOLA, secret vaults)
Creating microfrontends with Retool for rapid prototyping and functionality testing
Using nx monorepo with nrwl

Jun 2018 - Mar 2022

3 years 10 months

Fullstack Developer

freeyou AG

Developing cloud native applications
Designing and operating a streaming data architecture on Flink and Kafka (with AVRO schemas) and Cassandra
Supporting the actuarial team with data collection, processing, and analysis
Managing and maintaining the cloud infrastructure on AWS
Integrating web scrapers (Serverless/AWS Lambda)
Designing and implementing data protection and IT security in collaboration with the data protection officer
Technical lead for data engineers and DevOps engineers
Leading the team from a business perspective as interim product owner
Building CI/CD pipelines in GitLab for automated application deployment
Creating and prototyping chatbots: a Rasa NLU prototype and the production Ebot-7 application
Testing and evaluating new technologies for more stable, faster, secure, and sustainable application development
Presenting results to stakeholders and hosting internal meetups
Unit, integration, and end-to-end testing using JUnit, Cypress, Selenium, and Puppeteer
Using Vue.js and Angular with SASS/SCSS for frontend applications
Using GraphQL to interact with the backend

Oct 2016 - May 2018

1 year 8 months

Fullstack Developer

DEVK

Migrating legacy systems
Implementing online frontends with Java and Thymeleaf
Implementing business requirements for Spring batch jobs (life insurance)
Customizing interfaces
Organizing and mentoring school interns and dual-study students
Building CI/CD pipelines with Jenkins

Sep 2014 - Sep 2016

2 years 1 month

Apprentice

DEVK

Rotating through different teams to understand the DEVK ecosystem
Software development with Cobol/PL1
Maintaining Java-based web and batch applications
Developing and maintaining a goal-setting platform for internal employees
Building CI/CD pipelines with Jenkins

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 Insurance (7.5 years) and Information Technology (4 years).

Insurance

Information Technology

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 (11.5 years), Product Development (4 years), Business Intelligence (4 years), Operations (4 years), and Quality Assurance (4 years).

Information Technology

Product Development

Business Intelligence

Operations

Quality Assurance

Skills

Node.js
Vue.js
Serverless
Aws
Kafka
Spring
Apache Avro
Schema Registry
Apache Flink
Gitlab-ci
Relational Db
Angular
Cassandra
Javascript
Java
Terraform
Typescript
Next.js
React
Algolia
Sql
Packer
Python
Hasura
Graphql
Rest
Github Actions
Ansible
Rust
Bitbucket Ci
Jenkins
Message Queues
Json Schema
Sass/ Scss
Management

Languages

German

Advanced

English

Advanced

Education

Udayana University

Study abroad semester · Business Administration · Indonesia

Europäische Fachhochschule

Master's in Business Informatics, part-time · Business Informatics · Germany

AK-Berufskolleg

IT Specialist in Application Development · Business Administration · Germany

...and 1 more

Certifications & licenses

Agile Working: Product Owner & Scrum Master

educative

Learn Rust From Scratch

educative

Profile

Created

March 2024

Last Update

January 2026

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Frequently asked questions

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

Where is Collin based?

Collin is based in Kempen, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Collin speak?

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

How many years of experience does Collin have?

Collin has at least 11 years of experience. During this time, Collin has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 2 years and 3 months. Note that Collin may not have shared all experience and actually has more experience.

What roles would Collin be best suited for?

Based on recent experience, Collin would be well-suited for roles such as: Lead Fullstack Developer, Software Architect / Fullstack Developer, Fullstack Developer.

What is Collin's latest experience?

Collin's most recent position is Lead Fullstack Developer at Freelance.

What companies has Collin worked for in recent years?

In recent years, Collin has worked for Freelance, EquityBytes IUGmbH, and freeyou AG.

Which industries is Collin most experienced in?

Collin is most experienced in industries like Insurance and Information Technology (IT).

Which business areas is Collin most experienced in?

Collin is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Collin also has some experience in Operations and Quality Assurance (QA).

Which industries has Collin worked in recently?

Collin has recently worked in industries like Information Technology (IT) and Insurance.

Which business areas has Collin worked in recently?

Collin has recently worked in business areas like Information Technology (IT), Product Development, and Business Intelligence.

What is Collin's education?

Collin holds a Master in Business Informatics from Europäische Fachhochschule and a Bachelor in Business Informatics from Europäische Fachhochschule.

Does Collin have any certificates?

Collin has 2 certificates. These include: Agile Working: Product Owner & Scrum Master and Learn Rust From Scratch.

What is the availability of Collin?

Collin is immediately available full-time for suitable projects.

What is the rate of Collin?

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