Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm Matthes, a Frontend Software Engineer with 2+ years building production applications with React, Next.js, and TypeScript. I've worked across enterprise SaaS (serving clients like Deutsche Bank), healthcare, e-commerce, retail, and construction. From shipping features in 25+ agile sprints to building complete systems from scratch – including a healthcare EMR currently in daily use at an assisted living facility. What sets me apart: I handle the full cycle. Requirements gathering, implementation, testing, deployment. I've worked in teams doing daily code reviews and sprint planning, and I've solo-built applications where I owned everything from AWS infrastructure to the final UI. I write clean, maintainable code and actually understand the business problems I'm solving. I'm equally comfortable jumping into existing codebases or starting fresh. If you need someone who can deliver quality work without hand-holding, let's talk.…I'm Matthes, a Frontend Software Engineer with 2+ years building production applications with React, Next.js, and TypeScript. I've worked across enterprise SaaS (serving clients like Deutsche Bank), healthcare, e-commerce, retail, and construction. From shipping features in 25+ agile sprints to building complete systems from scratch – including a healthcare EMR currently in daily use at an assisted living facility. What sets me apart: I handle the full cycle. Requirements gathering, implementation, testing, deployment. I've worked in teams doing daily code reviews and sprint planning, and I've solo-built applications where I owned everything from AWS infrastructure to the final UI. I write clean, maintainable code and actually understand the business problems I'm solving. I'm equally comfortable jumping into existing codebases or starting fresh. If you need someone who can deliver quality work without hand-holding, let's talk.

Matthes Kaiser

Front-End Developer, Web Developer, Full Stack Developer, +3





I'm Matthes, a Frontend Software Engineer with 2+ years building production applications with React, Next.js, and TypeScript. I've worked across enterprise SaaS (serving clients like Deutsche Bank), healthcare, e-commerce, retail, and construction. From shipping features in 25+ agile sprints to building complete systems from scratch – including a healthcare EMR currently in daily use at an assisted living facility. What sets me apart: I handle the full cycle. Requirements gathering, implementation, testing, deployment. I've worked in teams doing daily code reviews and sprint planning, and I've solo-built applications where I owned everything from AWS infrastructure to the final UI. I write clean, maintainable code and actually understand the business problems I'm solving. I'm equally comfortable jumping into existing codebases or starting fresh. If you need someone who can deliver quality work without hand-holding, let's talk.…I'm Matthes, a Frontend Software Engineer with 2+ years building production applications with React, Next.js, and TypeScript. I've worked across enterprise SaaS (serving clients like Deutsche Bank), healthcare, e-commerce, retail, and construction. From shipping features in 25+ agile sprints to building complete systems from scratch – including a healthcare EMR currently in daily use at an assisted living facility. What sets me apart: I handle the full cycle. Requirements gathering, implementation, testing, deployment. I've worked in teams doing daily code reviews and sprint planning, and I've solo-built applications where I owned everything from AWS infrastructure to the final UI. I write clean, maintainable code and actually understand the business problems I'm solving. I'm equally comfortable jumping into existing codebases or starting fresh. If you need someone who can deliver quality work without hand-holding, let's talk.

Available to hire

I’m Matthes, a Frontend Software Engineer with 2+ years building production applications with React, Next.js, and TypeScript.

I’ve worked across enterprise SaaS (serving clients like Deutsche Bank), healthcare, e-commerce, retail, and construction. From shipping features in 25+ agile sprints to building complete systems from scratch – including a healthcare EMR currently in daily use at an assisted living facility.

What sets me apart: I handle the full cycle. Requirements gathering, implementation, testing, deployment. I’ve worked in teams doing daily code reviews and sprint planning, and I’ve solo-built applications where I owned everything from AWS infrastructure to the final UI. I write clean, maintainable code and actually understand the business problems I’m solving.

I’m equally comfortable jumping into existing codebases or starting fresh. If you need someone who can deliver quality work without hand-holding, let’s talk.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Beginner

Language

English

Fluent

Work Experience

Frontend Engineer at Strivion GmbH

February 1, 2024 - April 1, 2025

Contributed to enterprise SaaS platforms serving Global 500 companies, including Telekom and Deutsche Bank, for resume management and talent acquisition solutions. Delivered 25+ features across two-week sprints, built new UI components, and integrated GraphQL endpoints with React, Next.js, and TypeScript. Led frontend redesigns from design to production, built modular CMS components with Strapi, and collaborated daily with backend engineers to implement API integration and ensure accessibility. Implemented responsive interfaces with Tailwind CSS and UI libraries, and contributed to deployment workflows using GitLab CI/CD and Docker containerization.

Freelance Software Engineer at Self-Employed (Health care EMR System for Assisted Living Facility)

June 1, 2024 - Present

Designed and deployed a full-stack health care application from requirements gathering to production, replacing paper-based workflows with a digital system that manages daily operations for an assisted living facility. Built a real-time shift management and session-tracking dashboard using React, Next.js, and TypeScript. Implemented secure role-based authentication with NextAuth including a custom master-password override. Created an iPad-optimized charting interface used daily by care staff and built a HIPAA-compliant AWS infrastructure (EC2, RDS, S3, VPC). Implemented data layer with Prisma ORM and PostgreSQL, including resident records, shifts, and care documentation. Automated PDF report generation on shift completion to reduce administrative overhead. Collaborated with backend engineers on API design and integrated automated tests and documentation.