Matthes Kaiser
Frontend Software Engineer
Frontend engineer with 2+ years building production applications with React, Next.js, and TypeScript.
From enterprise SaaS platforms to full-stack healthcare systems, I ship features that work.
Professional Experience & Technology
2 years building production applications for enterprise SaaS platforms and startup products across career platforms, healthcare, and distribution.
Full-time
Frontend Engineer
Strivion GmbH•Germany (Remote)
Feb 2024-Apr 2025
Contributed to enterprise SaaS platform serving Global 500 companies including Telekom and Deutsche Bank for resume management and talent acquisition solutions
- •Delivered features across 25+ two-week sprints, consistently building new UI components and integrating GraphQL endpoints with React, Next.js, and TypeScript
- •Developed user-facing features including profile management, data visualization, and interactive forms with real-time validation and state management using React Query
- •Owned complete redesign and implementation of company website and product landing pages from Figma designs to production
- •Built modular Strapi CMS architecture with reusable components enabling marketing team to create and manage pages independently
- •Collaborated daily with backend engineers on API integration, participated in code reviews, and contributed to sprint planning
- •Implemented responsive interfaces with Tailwind CSS and HeroUI, ensuring pixel-perfect adherence to design specifications
- •Contributed to deployment workflows using GitLab CI/CD pipelines and Docker containerization
ReactNext.jsTypeScriptTailwind CSSGraphQLReact QueryDockerGitLab CI/CDStrapi CMSHeroUIFigmaAgile/ScrumJiraPostman
Freelance
Freelance Software Engineer
Self-Employed•US & Germany
June 2024-Present
Built full-stack applications across healthcare and e-commerce, delivering end-to-end solutions from requirements gathering to production deployment
- •Designed and deployed full-stack healthcare application from requirements gathering to production, replacing paper-based workflows with digital system managing daily operations for assisted living facility
- •Built real-time shift management and session tracking dashboard using React, Next.js, and TypeScript, enabling administrators to monitor active staff sessions and resident assignments
- •Implemented secure role-based authentication with NextAuth, including custom master password override feature for operational flexibility
- •Developed iPad-optimized charting interface currently used daily by care staff, eliminating documentation errors from illegible handwriting and streamlining regulatory compliance
- •Integrated automated PDF report generation system triggered on shift completion, reducing administrative overhead
- •Architected and deployed HIPAA-compliant AWS infrastructure (EC2, RDS, S3, VPC) with security controls and encrypted data storage
- •Built data layer with Prisma ORM and PostgreSQL handling resident records, shift schedules, and care documentation
- •Developed order management interfaces and product catalog pages for B2B distribution platform using React with Vite and Material-UI
- •Integrated GraphQL endpoints for real-time order data, implementing complex filtering, sorting, and pagination functionality
ReactNext.jsTypeScriptTailwind CSSAWSNextAuthPrismaPostgreSQLGraphQLREST APIsViteMaterial-UIshadcn/uiNode.js
Featured Projects
A showcase of my work across different domains - from enterprise solutions to personal projects and clean business websites.
3 Enterprise
3 Personal
3 Websites
2025/2026
EMR System Assisted Living
Project Owned asFreelance Software Engineer
- •Designed and deployed full-stack healthcare application from requirements gathering to production, replacing paper-based workflows with digital system managing daily operations for assisted living facility
- •Built real-time shift management and session tracking dashboard using React, Next.js, and TypeScript, enabling administrators to monitor active staff sessions and resident assignments
- •Implemented secure role-based authentication with NextAuth, including custom master password override feature for operational flexibility
- •Developed iPad-optimized charting interface currently used daily by care staff, eliminating documentation errors from illegible handwriting and streamlining regulatory compliance
- •Integrated automated PDF report generation system triggered on shift completion, reducing administrative overhead
- •Architected and deployed HIPAA-compliant AWS infrastructure (EC2, RDS, S3, VPC) with security controls and encrypted data storage
- •Built data layer with Prisma ORM and PostgreSQL handling resident records, shift schedules, and care documentation
HIPAA CompliantEnd-to-End DevelopmentProduction
Next.jsReactTypeScriptTailwind CSSNextAuthAWS EC2AWS RDSAWS VPCAWS S3PrismaPostgreSQLshadcn/ui
2024/2025
Curivio
Contributed asFrontend EngineeratStrivion GmbH
- •Delivered features across 25+ two-week sprints, consistently building new UI components and integrating GraphQL endpoints with React, Next.js, and TypeScript
- •Developed user-facing features including profile management, data visualization, and interactive forms with real-time validation and state management using React Query
- •Owned complete redesign and implementation of company website and product landing pages from Figma designs to production
- •Built modular Strapi CMS architecture with reusable components enabling marketing team to create and manage pages independently
- •Collaborated daily with backend engineers on API integration, participated in code reviews, and contributed to sprint planning
- •Implemented responsive interfaces with Tailwind CSS and HeroUI, ensuring pixel-perfect adherence to design specifications
- •Contributed to deployment workflows using GitLab CI/CD pipelines and Docker containerization
Global 500Enterprise SaaS
Next.jsReactTypeScriptTailwind CSSGraphQLReact QueryPostmanHeroUIStrapi CMSDockerGitLab CI/CDFigmaJira
2024
eLink Online Service
Contributed asFreelance Software EngineerateLink Distribution AG
- •Developed order management interfaces and product catalog pages for B2B distribution platform using React with Vite and Material-UI
- •Integrated GraphQL endpoints for real-time order data, implementing complex filtering, sorting, and pagination functionality
- •Delivered responsive layouts ensuring cross-browser compatibility for internal staff and external partners
Enterprise PlatformB2B
ReactViteTypeScriptGraphQLMUIPostman
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Certifications & Credentials
Professional certifications that validate my expertise and commitment to continuous learning.
2025
DevOps Professional Certificate
PagerDuty and LinkedIn
Professional certificate validating DevOps expertise and modern infrastructure practices
DevOpsCI/CDInfrastructure as Code (IaC)
2025
AWS Certified Cloud Practitioner
Amazon Web Services (AWS)
AWS Cloud Practitioner certification covering core AWS services, pricing models, and cloud architecture fundamentals.
AWSCloud Computing
2025
Docker Foundations Professional
Docker and LinkedIn
Professional certificate validating fundamental knowledge of containerization, Docker and Docker products.
DockerContainerizationDocker Products
Colleague & Client Testimonials
Don't just take my word for it. Here's what colleagues and clients say about working with me.
"Working with Matthes was a great experience. He is a talented engineer with a strong sense for modern, responsive UI design and the ability to build high-performance web applications using Next.js and TypeScript. Overall, Matthes is a reliable, motivated team player and a real asset to any agile development team."
Steven Neumann
Lead Fullstack Engineer
Strivion GmbH
Enterprise
"Matthes transformed our online presence completely. The website he built generated 40% more leads in the first month alone. His SEO optimization and conversion-focused design approach delivered real business results. Highly recommend working with him!"
Antonio Perez
Business Owner
Blue Mountain Painting
Freelance
"When we were starting our facility, we planned to use paper charts. Matthes talked us out of it and built us a proper EMR system instead. He worked with us to figure out exactly what we needed, and now our staff can't imagine going back. The iPad workflow works flawlessly, even offline, and we've avoided countless documentation headaches."
Jose Zaragoza
Business Owner
Trillium Adult Care Home
Freelance
Get In Touch
Ready to start your next project? Let's discuss how I can help bring your ideas to life.