Hi, I’m Marcel Slowikowski.
I’m a software engineer specializing in full-stack development and seamless product delivery.
About Me
I’m a software engineer & entrepreneur who transforms ambitious ideas into dependable, scalable products that make a measurable impact. Grounded in computer science and seasoned by hands-on experience running a business, I bridge code with commercial insight—translating real-world constraints into clean architecture, intuitive UX, and fast feedback loops.
I’ve delivered full-stack web apps that automate workflows, streamline payments, and surface real-time analytics, consistently cutting operational overhead and accelerating go-to-market timelines. My toolkit centers on rapid prototyping, test-driven development, and data-informed iteration, ensuring every feature aligns with user value and ROI.
From integrating Stripe and optimizing Next.js pipelines to architecting cloud microservices, my north star is simple: ship performant, maintainable software that empowers teams to make smarter, faster decisions at scale.
Skills
Programming Languages
- C
- C++
- C#
- Java
- Python
- JavaScript
- Assembly
- Lua
App Development
- Android Studio
- Java
- Kotlin
- Swift
- XML
- Flutter
Frontend Development
- HTML
- CSS
- Tailwind
- React
- Next.js
- Bootstrap
Backend Development
- Node.js
- TypeScript
- Next.js
Database Management
- PostgreSQL
- MySQL
- Mongo
- Firebase
- JSON
Debugging / Testing
- JUnit
- Postman
Experience
Founder & Software Engineer @ Binary Dev Studio
Aug 2023 – Present
- Achieved 200% YoY revenue growth by delivering efficient, scalable full-stack software solutions, significantly enhancing client productivity and operational performance.
- Developed timely MVP prototypes, accelerating client feedback and product validation, resulting in a 30% reduction in development costs.
- Improved payment efficiency by integrating Stripe’s REST API, cutting client processing time by 50% and improving transaction reliability.
- Delivered 11+ end to end client projects, achieving a 95% average client satisfaction rating.
- Deployed cloud-based infrastructure, reducing client server costs by up to 40% and enhancing application scalability.
Web Developer Intern @ Glenbard West High School
Jun 2022 – Aug 2022
- Increased mobile engagement 60% by designing responsive, user-first web interfaces enhancing cross-device UX.
- Debugged frontend code to ensure cross platform compatibility, cutting browser related issues by 90%.
- Enhanced page load speed by reducing FCP time to under 0.5s using HTML, Tailwind, React.
- Refactored frontend code into modular components, improving maintainability and reducing future development time by 50%.
Projects
OptiWork HQ
Business platform that lets mobile and small businesses book, schedule, invoice, and take payments in one place.
- Next.js
- Stripe REST API
- Postgres
- Node.js
- Twilio Text API
- Nodemailer
Home Care Reminder V2 - 20% Complete
Home Care Reminder was designed to keep all household maintenance reminders in one simple and easy to use app. App was created for a client.
- Swift
- XCode
- SwiftUI
Get In Touch
I’m currently looking for new opportunities. Whether you have a question or just want to say hi, my inbox is always open.