As a Data Scientist, Machine Learning Engineer, Cloud Developer, Data Engineer, Backend Developer, and Startup Co-founder, I have successfully leveraged AI and cloud technologies to drive innovation and solve real-world challenges across various industries. Having co-founded and led an AI startup that was later acquired, I bring a unique blend of technical expertise and business insight. My focus lies in developing advanced machine learning models, data-driven solutions, and scalable cloud infrastructures on platforms like AWS and Azure.

Seasoned inventor, software developer, researcher and entrepreneur with a proven track record across a wide range of technologies and industries. Combining specialized expertise on simulation and optimization with hands-on development of software & hardware. Strong communicator and strategic thinker who leads by example. Dutch national with working experience in the EU and Southeast Asia. Solid analytical background in simulation, optimization, scientific computing and real-time control. Experienced consultant working with companies and governments. I thrive when analyzing and optimizing complex, multi-scale, multi-domain technological challenges. Topics includes: - Smart energy system (smart grids, 5th generation district heating/cooling, hybrid energy systems), - Electric Mobility (optimization of fleet electrification strategies, battery swapping, smart charging, embedding EV infrastructure in a smart energy system), - Smart buildings (indoor climate optimization, HVAC simulation and control), - Other ventures in GIS, active noise and vibration control and video analytics I have built simulation and optimization environments from scratch that include novel algorithms and functionalities that go beyond the state of the art. I've also built all elements, front-end and back-end of a fleet management web portal, including IoT hardware and software. I'm a full stack developer with experience in Python, (embedded) C++, Javascript/Typescript, React, postgresql, Azure cloud.

I am a highly motivated, passionate Engineering Lead cum hands-on DevOps engineer/architect with quality experience in software design and development using open source technologies. I strive to work with the motto “Simple is difficult enough” and set high standards around quality, maintainability, observability and performance of what we deliver as a team. Skills & Experience Technology and Frameworks: Java, Scala, Akka, Akka-http, Akka-Streams, Cats, CatsIO, Kafka, Cassandra, ELK stack, Lucene, Hibernate, Jersey, SpringBoot, Spring-Security, Apache Camel, JAX-WS, JAX-RS, Javascript, ReactJS, AngularJS, Pentaho Kettle, Javascript, Typescript, Node.js, Lit-HTML, Polymer, Google Dialogflow DevOps Environment: Docker, Vagrant, Ansible, mvn, git, svn, cvs, ant, hudson, jenkins, sbt, nexus, intellij, eclipse, TFS, Ubuntu, OSX, Prometheus, ELK, OpenTracing, Azure DevOps Databases: Postgres, Oracle, DB2, SQL Server, MySQL, Apache Cassandra, SQL Server, MongoDB Cloud environments: AWS EC2, RDS, S3, Microsoft Azure Methodologies: Agile, Scrum, XP, Kanban, Kata, Lean Current Interests: Machine Learning, Applying Functional Programming, Kubernetes, Istio, Running in the cloud

Hey there! Looking for a UX/UI Designer who can not only make your project look amazing but also build it from the ground up? Well, you’ve just found your new favorite freelancer! I’m Lennart, a seasoned UX/UI Designer with over 20 years of experience (yep, I’ve been doing this since flip phones were a thing). With a unique blend of design expertise and development skills, I offer a complete package that ensures your project not only looks stunning but functions seamlessly. Why you’ll love working with me: - One-Stop Shop: I design it, I build it, I deliver it. Whether it’s a website, an app, or custom software, I’ve got you covered. No need to juggle between a designer and a developer, I’m your guy! - 150+ Glowing Reviews: My clients seem to like me (and my work). With over 170 five-star reviews on Google, Clutch, 99designs, GoodFirms, TechBehemoths and Sortlist, you can trust that your project is in good hands. Spoiler alert: I’m all about making you happy. - Design Nerd at Heart: Sure, I’ve built a whole business and lead a team, but nothing beats getting my hands dirty with some good old-fashioned design work. It’s my jam, and I’m pretty good at it if I do say so myself. - Custom-Tailored Awesomeness: Your project isn’t like anyone else’s, so why should the approach be? I’m all about making sure what we create is uniquely you, with a sprinkle of awesome, of course. Let’s Collaborate! If you’re looking for a designer who not only understands the importance of user experience but can also deliver fully functional, high-quality digital products, let’s chat! Whether it’s a website, app, or custom software, I’m here to make your project a success. So, what do you say? Drop me a message, and let’s get this show on the road [Last updated: September 25, 2025]

I spent the last several years engineering payment engines, mobile apps and banking products - software that can't be slow, can't break, and can't look sloppy. I now bring that same bar to businesses and brand websites. Please checkout my personal website (linked below) to see more of my work. Teammates describe me as resourceful, driven, and fun to work with. I communicate clearly and keep things moving. I graduated with a MSc in AI and have been specialising in AI imagery and video which can help with your site, socials or ads that need engagement. Most freelancers can build a site or produce visuals. You normally hire two people, brief two people, and pray the handoffs don't drift. With me, it's one person, one timeline, one cohesive brand. What you get - A production-grade site: custom angular, nextjs or wix/framer. - The visuals to launch it: hero stills, PDP imagery, ad creative variants, and short-form motion. - Character consistency through character-locked pipelines - not one-off lucky prompts. Why my ex-fintech experience matters for your business Banking apps treat every millisecond, every edge case, and every pixel as a customer-trust signal. Most marketing sites don't. The brands that ship at that bar - Glossier, Aesop, Liquid Death - convert noticeably better. I bring that discipline to your store. Stack - Web: Website builder or Custom Angular or Next.js, React, TypeScript, Tailwind, shadcn/ui, Framer Motion, GSAP, Vercel, Sanity - AI imagery: Nano Banana, Image GPT, ComfyUI, Fal.ai - AI video: Higgsfield (Soul ID for consistent talent), Kling I am open to long term partnerships and would love to discuss your vision. Looking forward to learning more about your project. Cheers, Trip

UX Researcher & Designer | Creating Intuitive, Data-Driven Experiences I specialize in bridging the gap between user needs and seamless design. With expertise in UX research and design, I conduct in-depth user research, usability testing, and data analysis to create intuitive, user-centered digital experiences. User Research & Usability Testing – I uncover insights through qualitative and quantitative research. UX/UI Design – I craft wireframes, prototypes, and interfaces that enhance usability and engagement. I thrive in web, mobile, and enterprise solutions, helping businesses enhance their digital products with a human-centered approach. Let’s collaborate to build experiences that truly resonate with users!

🚀 Specialized in Product Design and UX Strategy, helping ambitious startups, SaaS businesses, and governmental organizations achieve their mission, business, and design goals. I only care about one thing - Results. I am passionate about helping clients grow and streamline processes while eliminating the frustrations of attempting to share concepts by converting their visions in to professional designs. How I do it: Using user-centered design and blending creativity with behavioral insights, I delve into the core of the problem with unwavering commitment to create meaningful emotional connections with users. Why I do it: Design is not just a job for me—it's my craft. By converting my skills into a positive impact on the digital world, I bring smiles, save time for precious screen-free moments, meet great minds, and bring their ambitious ideas to life. 🎯 The result: I help you strategize, design, launch, and grow impactful digital brands and products. ❓ Got questions? Feel free to reach out, and I'll get straight to the point about your project. SKILLS: ✅ UX & UI ✅ SaaS ✅ CRM | ERP ✅ Mobile App design ✅ Responsive/Adaptive design ✅ Wireframing ✅ Prototyping ✅ Adobe XD ✅ Figma ✅ Adobe Photoshop ✅ Adobe Illustrator 🌐 SERVICE: I provide the following UX/UI services: 1. UX/UI design of WordPress, Drupal, Joomla, E-commerce, Magento and SaaS websites. 2. Responsive websites 3. UX/UI design of mobile websites/apps 4 Designing Email templates 5. Mockups/Layouts design 6. UX/UI design of web apps 7. Landing page design 8. Dashboard/Admin screens design 9. XHTML/CSS ✅ 𝐇𝐚𝐯𝐞 𝐚 𝐩𝐫𝐨𝐣𝐞𝐜𝐭? 𝐂𝐥𝐢𝐜𝐤 𝐭𝐡𝐞 “𝐈𝐍𝐕𝐈𝐓𝐄” 𝐛𝐮𝐭𝐭𝐨𝐧 𝐚𝐭 𝐭𝐡𝐞 𝐭𝐨𝐩 𝐨𝐟 𝐦𝐲 𝐩𝐫𝐨𝐟𝐢𝐥𝐞 𝐚𝐧𝐝 𝐈’𝐥𝐥 𝐓𝐀𝐊𝐄 𝐈𝐓 𝐅𝐑𝐎𝐌 𝐓𝐇𝐄𝐑𝐄! ---------------------------------------------------------------------------------------------------------------------- How do we proceed from here? I offer free consultations for all potential clients. It’s vital to establish that we're an excellent fit to work together Click "Hire now" to get started and i'll schedule the call for us. Speak to you soon! Frank T. 🏅 Reviews and feedback from high-profile clients ⭐ | Liesbeth Mutert | Flemish Government "I am working with Frank on a project as a client, which allows me to evaluate his deliverables and client relationship well. Frank is very capable, listens carefully to the client, and translates their needs into excellent graphic designs. He is a creative UX designer who brings ideas and challenges the client. Frank is flexible, friendly, and enthusiastic. The work he delivers is professional and of high quality. He is a pleasant person to work with, and I would not hesitate to hire him again for future projects. " ⭐ | Edwin Witlox | Archipel Academy "Frank is a very skilled UX Designer maybe even to good at his job for our company at that time. I think we weren't ready for Frank. He's also a very social person. I really enjoyed the talks about anything and nothing." ⭐ | Mart van Hoof | ChainCargo "Was a pleasure working with Frank in the past years. He has an eye for detail and understand what the customer want to see/achieve. Always looking for perfection and brings up ideas which made it for us as customer/user much easier." ⭐ | Denis v. Loosbroek | Power Slim "Frank is a cheerful, communicative colleague, with a heart for the company. He likes to think proactively about concepts to be developed and not only comes up with creative input, but also with strategic ones, without ignoring the wishes of the client. Frank can switch quickly, works quickly if desired and meticulously if necessary. Frank's designs satisfy 🔑 KEYWORDS: UX • UI • UI/UX • User Interface Design • Figma • Landing Page Design • Web & Mobile Design • Mockup • Responsive Design • Graphics & UI Design • User Experience Design • Website • Wireframing • Google • Material Design • Photoshop • Drupal design • WordPress design • Web3 • Startup • Mobile UI • E-commerce • iOS • Android • guidelines • Dashboard Design • Prototyping • User Research • Agile • UX Process • Interaction Design • Visual Design • Wireframing • User Testing • Front-end Development • Responsive Design • Accessibility • Motion Design • Product Design • Information Architecture • Usability • A/B Testing • Design Thinking • Gamification

It's been a while since I chose the React.js library to continue my journey, and I would be happy if I had the opportunity to do a telecommuting internship to enter this field. My skills are: # es6+, # SASS # React.js I have created some works to show my skills on Github. I will be happy if you see them and send me your feedback about my work and skills also I'm curious to hear your opinion about myself. You can see my works on GitHub on mkajs Thanks for reading my resume.

Hey there! 👋 I don’t just build websites. I build high-performance digital products that solve real business problems. As a Full-Stack Developer, I specialize in creating fast and secure applications. By combining the power of React and Tailwind CSS, I build component-driven user interfaces that look sharp and feel incredibly smooth. But a great frontend needs a solid backbone. I design efficient database structures and secure backend logic whether utilizing modern BaaS solutions like Supabase or building robust architectures with C#. What I can help you with: -SaaS & MVP Development: Turning your ideas into a production-ready prototype in weeks, not months. -Custom Dashboards & Portals: Creating data-heavy, interactive platforms with clean state management. -Database & API Integration: Structuring secure user authentication and seamless data flows. I bridge the gap between frontend design and backend data architecture so you don't have to hire a massive team. Let's launch your project fast, clean, and built to scale. 📩 Got a project in mind? Let’s connect and talk about how we can bring your application to life!

I am currently a masters student in mathematics at Leiden University. Between 2020 and 2023 I was working as a software developer before deciding to resume my studies.