Kai k.

CEO

Developer Tag • ZZP

Sep 2025 - Present • 8 mos

Founder & CEO with a strong engineering background and hands-on development experience, leading a small, high-performing team of developers. I actively contribute to system architecture, core development, and technical decision-making while overseeing delivery and quality. My team is capable of building fast, scalable, and affordable products without compromising on performance, security, or maintainability. We specialise in SaaS platforms, enterprise web applications, AI-driven automations, and custom CRM systems, delivering solutions that align closely with business goals. I combine technical execution with leadership, ensuring projects move quickly from concept to production with clear communication, realistic timelines, and cost-effective delivery.

Lead Software Engineer

Programmers • Fulltime

Jul 2023 - Oct 2025 • 2 yrs 3 mos

1) Own system architecture for biometric verification workflows (KYC, AML, identity matching) 2) Lead design decisions for high-throughput, low-latency systems 3) Review and approve technical designs, PRs, and deployments 4) Enforce engineering best practices (security, testing, performance) mplement secure-by-design systems for biometric data 5) Ensure compliance with GDPR, ISO 27001, SOC 2, and RegTech standards 6) Oversee data encryption, access controls, and audit logging

Senior Software Engineer

JOIN Solutions Gmbh • Parttime

May 2022 - Apr 2025 • 2 yrs 11 mos

Spearheaded the development of features that maximize revenue by 30%. Optimized existing codebase, resulting in a 25% improvement in application performance. Implemented automated testing protocols, reducing bug reports by 40% Architected and led the development of scalable, high-performance web applications using modern JavaScript frameworks (React.js, Next.js) and backend services (Node.js, Express). Oversaw CI/CD pipeline implementation (GitHub Actions, Jenkins) to streamline deployment workflows and reduce release cycles. Collaborated with UI/UX designers to build responsive, accessible interfaces using Tailwind CSS and componentbased architecture. Led microservices-based backend design, utilizing RESTful APIs and optimizing database interactions with MongoDB and PostgreSQL. Spearheaded code quality assurance via automated testing (Jest, Cypress) and enforced TypeScript standards across the codebase.