Kim Kern - Lead Fullstack Node/React Developer

Q: Where is Kim based?

Kim is based in Berlin, Germany .

Q: What languages does Kim speak?

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

Q: How many years of experience does Kim have?

Kim has at least 12 years of experience. During this time, Kim has worked in at least 7 different roles and for 5 different companies . The average length of individual experience is 2 years and 9 months . Note that Kim may not have shared all experience and actually has more experience.

Q: What is Kim's latest experience?

Kim's most recent position is Lead Fullstack Node/React Developer at Rytle .

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

In recent years, Kim has worked for Rytle , Leogistics , and Klarna .

Q: Which industries is Kim most experienced in?

Kim is most experienced in industries like Information Technology (IT) , Transportation and Logistics , and Banking and Finance .

Q: Which business areas is Kim most experienced in?

Kim is most experienced in business areas like Information Technology (IT) , Product Development , and Project Management . Kim also has some experience in Quality Assurance (QA) .

Q: Which industries has Kim worked in recently?

Kim has recently worked in industries like Information Technology (IT) , Transportation and Logistics , and Banking and Finance .

Q: Which business areas has Kim worked in recently?

Kim has recently worked in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Recommended expert

Berlin, Germany

Experience

Nov 2023 - Jan 2024

3 months

Lead Fullstack Node/React Developer

Rytle

Development of React.js / Next.js web application, displaying live sensor data and optimized routes on interactive maps.
Architected and managed Node.js backend services in Docker containers integrated with Kafka, responsible for order management and routing.
Guided and supported junior developers in their professional growth as team lead developer.
Technologies: node.js, React, TypeScript, Postgres, Docker, Kafka, Github CI, ArgoCD

Nov 2021 - Apr 2023

1 year 6 months

Developer for microservice logistics platform

Leogistics

Integrated real-time sensor data (AWS SNS/SQS) and created a scalable rule-based alerting system using Dapr.
Established a lerna monorepo for internal npm packages with an automated Gitlab CI pipeline for semantic releases.
Conducted performance analysis (node clinic) and refactoring/splitting of existing microservices.
Technologies: nestjs, node.js, TypeScript, mongoDB, AWS, NATS, GitlabCI, Kubernetes, Dapr

Mar 2021 - Sep 2021

7 months

Engineering Manager for React-Native App Features

Klarna

Led the Form Filling team as the Competence Lead, responsible for technical design decisions, team meetings, and personal development of team members.
Enhanced analytics/monitoring and defined KPIs across teams, leveraging domain knowledge.
Defined domain standard for SLOs as member of the Operational Excellence Group.
Technologies: React Native, node.js, TypeScript, Amplitude, Redux, Splunk, Datadog

Mar 2020 - Mar 2021

1 year 1 month

Full Stack Lead Developer for Web Automation APIs

Klarna

Developed multiple backend services using Node.js, enabling advanced web automation capabilities for internal stakeholder teams.
Built CLI tools and browser add-ons for data collection and generation, automated through a Jenkins pipeline.
Integrated APIs into Klarna's React Native app and implemented metrics in Amplitude for monitoring successful go-live and ongoing operations.
Technologies: node.js, TypeScript, Express, PostgreSQL, Puppeteer, Jest, Jenkins, AWS, Splunk

Feb 2020 - Mar 2020

2 months

Social Network Platform with Real-time Data

Linkbase

Developed a progressive web app prototype, focusing on social networking with real-time data integration from a Firebase database.
Collaborated closely with the product owner/designer, maintaining an agile development approach and incorporating direct feedback.
Technologies: Angular, TypeScript, Angular Material, Firebase, Service Worker

Jan 2018 - Present

8 years 2 months

Freelance Developer

See list of recent projects below
Main focus: node.js, React.js, TypeScript

Jan 2014 - Dec 2020

7 years

Software Developer (part time)

Projektron GmbH

Project management software
Java
JS/TS
SQL
Postgres
Jenkins
Scrum

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 Information Technology (12 years), Transportation (1.5 years), and Banking and Finance (1.5 years).

Information Technology

Transportation

Banking and Finance

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 (12 years), Product Development (9 years), Project Management (7 years), and Quality Assurance (0.5 years).

Information Technology

Product Development

Project Management

Quality Assurance

Languages

German

Native

English

Advanced

Education

Reuchlin Gymnasium Pforzheim

Abitur (A level) · Pforzheim, Germany · 1.1 (A+)

Freie Universität Berlin

Bachelor of Science, Computer Science · Computer Science · Berlin, Germany · 1.3 (A)

Freie Universität Berlin

Master of Science, Computer Science · Computer Science · Berlin, Germany · 1.2 (A)

Profile

Created

February 2024

Last Update

February 2026

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

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

Where is Kim based?

Kim is based in Berlin, Germany.

What languages does Kim speak?

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

How many years of experience does Kim have?

Kim has at least 12 years of experience. During this time, Kim has worked in at least 7 different roles and for 5 different companies. The average length of individual experience is 2 years and 9 months. Note that Kim may not have shared all experience and actually has more experience.

What roles would Kim be best suited for?

Based on recent experience, Kim would be well-suited for roles such as: Lead Fullstack Node/React Developer, Developer for microservice logistics platform, Engineering Manager for React-Native App Features.

What is Kim's latest experience?

Kim's most recent position is Lead Fullstack Node/React Developer at Rytle.

What companies has Kim worked for in recent years?

In recent years, Kim has worked for Rytle, Leogistics, and Klarna.

Which industries is Kim most experienced in?

Kim is most experienced in industries like Information Technology (IT), Transportation and Logistics, and Banking and Finance.

Which business areas is Kim most experienced in?

Kim is most experienced in business areas like Information Technology (IT), Product Development, and Project Management. Kim also has some experience in Quality Assurance (QA).

Which industries has Kim worked in recently?

Kim has recently worked in industries like Information Technology (IT), Transportation and Logistics, and Banking and Finance.

Which business areas has Kim worked in recently?

Kim has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

What is Kim's education?

Kim holds a Master in Computer Science from Freie Universität Berlin and a Bachelor in Computer Science from Freie Universität Berlin.