Kim Kern-Lead Fullstack Node/React Developer
Check rate
Experience
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
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
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
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
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
Freelance Developer
- See list of recent projects below
- Main focus: node.js, React.js, TypeScript
Software Developer (part time)
Projektron GmbH
- Project management software
- Java
- JS/TS
- SQL
- Postgres
- Jenkins
- Scrum
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Transportation, and Banking and Finance.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Project Management, and Quality Assurance.
Languages
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)
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Kim is based in Berlin, Germany.
Kim speaks the following languages: German (Native), English (Advanced).
Kim has at least 13 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 10 months. Note that Kim may not have shared all experience and actually has more experience.
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.
Kim's most recent position is Lead Fullstack Node/React Developer at Rytle.
In recent years, Kim has worked for Rytle, Leogistics, and Klarna.
Kim is most experienced in industries like Information Technology, Transportation, and Banking and Finance.
Kim is most experienced in business areas like Information Technology, Product Development, and Project Management. Kim also has some experience in Quality Assurance.
Kim has recently worked in industries like Information Technology, Transportation, and Banking and Finance.
Kim has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.
Kim holds a Master in Computer Science from Freie Universität Berlin and a Bachelor in Computer Science from Freie Universität Berlin.
The availability of Kim needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 26 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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