Maximilian Leistner
Web & Software Dev / Architect / Team-Lead
Experience
Project Manager / Conversion Optimization Specialist
Sachkundegurus / AEVOGurus
- Analysis of customer onboarding, in-app, and landing page processes
- Optimization of conversion-related features
- Liaison between CTO, design, and development teams
- Project responsibility for new product processes and landing pages
Team Lead
quäntchen + glück GmbH & Co KG
Development of custom web applications and CMS-based systems (e.g., WordPress)
Performance optimization and refactoring of existing systems
Technical concept, architecture, and implementation of complex applications
Team leadership with responsibility for 5+ developers
Platforms and tools for public procurement and nationwide innovation programs
High demands for stability, transparency, and long-term maintainability
Development of interactive decision-making and evaluation systems
Founder / Senior Software Developer / Senior Full-Stack Web Developer
Freelance & fuxdev GmbH
- Founded and managed a software development company focused on custom software and SaaS products
- Technical concept, architecture, and implementation of complex software systems
- Development of multiple SaaS products (compliance, e-commerce, automation)
- Responsibility for technical strategy, code quality, and maintainability
- Long-term technical partner for SMEs, agencies, and product companies
- Deep expertise in PropTech, FinTech, and educational platforms
- Development of custom web applications and platforms
- Performance optimization and refactoring of legacy systems
- API design and integration of third-party systems
- Close collaboration with founders, product owners, and stakeholders
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 (16 years), Education (16 years), Banking and Finance (16 years), and Advertising (3 years).
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 Product Development (16 years), Information Technology (16 years), Marketing (3 years), and Project Management (3 years).
Summary
Experienced senior full-stack developer with over 15 years of professional experience in developing, scaling, and operating web applications and SaaS products. I specialize in translating complex technical and business requirements into robust, maintainable, and scalable software solutions.
My work combines hands-on software development with architectural responsibility and entrepreneurially driven decision-making.
German senior full-stack developer and founder with over 15 years of experience in developing, scaling, and operating web and SaaS applications. Strong focus on sustainable architecture, performance, and business-driven technical decisions.
I enjoy both building new developments from scratch and working in existing teams to stabilize legacy systems, modernize architectures, or deliberately scale platforms.
Through my experience in PropTech, governance, the public sector, education, and companies at various maturity levels, I effectively bridge technology, product, and business – ensuring that technical decisions support long-term strategic goals.
Skills
Software & Architecture
- Full-stack Development (Frontend & Backend)
- Full-stack Development (Php, Javascript, Typescript)
- Software Architecture & System Design
- Saas & Platform Development
- Performance Optimization
- Api Design & Integrations
- Shopify / Wordpress / Nuxt.js / Next.js
Frontend
- Vue.js, Nuxt.js, Next.js, Javascript
- Html, Css, Tailwind Css
Backend
- Laravel, Php, Cms
- Relational Databases (Mysql, Postgresql)
- Node.js
- Python
Business & Leadership
- Technical Leadership & Project Responsibility
- Technical Leadership & Decision-making Responsibility
- Product Thinking & Cost Awareness
- Communication Between Business & Development
Languages
Education
Darmstadt University of Applied Sciences
Bsc. of Arts · Digital Media - Interactive Media Design
Profile
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