Your app shouldn’t just function, it should fuel your business. At 6th Man, we specialize in custom mobile & web application development built for performance, scalability, and seamless user experiences. Whether you’re launching a new product or optimizing an existing platform, our team designs, develops, and delivers digital solutions that move the needle. From concept to code to continuous growth, we help you build apps that users love and businesses grow with.
Trusted by 20+ top companies.
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Speed and reliability matter. Our custom mobile & web applications are built with clean code, fast load times, and seamless user experiences that keep users engaged and coming back.
We design and build using React Native and Next.js for performance across iOS, Android, and web. One codebase, multiple platforms, zero compromise.
From onboarding flows to CTAs, every interaction is designed to drive engagement and growth. If it doesn’t help your business scale, we don’t build it.
Our apps evolve with your users. We continuously analyze performance data, user behavior, and feedback to optimize for long-term retention and ROI.
Over the years, we’ve mastered custom mobile & web application development that’s fast, scalable, and built to perform. Ready to build something that grows with you?
At 6th Man, flexibility is in our DNA. Whether you need a project-based build or ongoing development support, we plug in exactly where you need us. Think of us as your extended tech team ready to design, develop, and optimize without the overhead of hiring in-house.
We can jump in to launch your MVP, scale an existing app, or stay on board for continuous improvements whatever fits your roadmap. With our on-demand model, you get the right skills at the right time, from senior developers to UX strategists, ensuring your product keeps evolving as your business grows.
Step into our cases, where each success story is a game-winning play that proves our strategies deliver the ultimate competitive edge.
Groenvanbijons needed a landingpage for their boomplantdag campaign, so we created a killer landingpage.
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We created a real time auction web application to use during the stars&fashion event of Mercedes VDH.
MD Hospitality had an outdated website that was difficult to manage. The result: a modern, fast, and fully CMS-driven website in three languages (NL/FR/EN), ready for growth.
Antiquair Online had an outdated site without a clear SEO foundation. The request: a Webflow website with a unique vintage look, optimized for organic growth and easy management.
Inboedelservice Leuven had an outdated website that converted poorly and was difficult to manage. The request: a modern, fast, and fully CMS-driven website with a focus on conversion and subtle animations.
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The German proptech startup SCALARA needed a new stream of leads. We used SEA and SEO to gather them. The results speak for themselves.
Every successful application starts with clarity. We begin by understanding your business goals, target users, and market landscape. Our team conducts deep research, workshops, and technical audits to define the roadmap, key features, and success metrics. The outcome? A clear, validated strategy for your custom mobile or web application development with zero guesswork.
This is where your vision turns into a product.
Our development team builds using modern, scalable technologies like React, Next.js, Node.js and React Native, depending on your product’s needs. We focus on writing clean, modular code to ensure your app performs flawlessly across devices and platforms.
No bugs. No surprises.
Before launch, every application goes through rigorous testing, performance, load, and usability checks, to ensure a frictionless user experience. We optimize Core Web Vitals, responsiveness, and accessibility to meet the highest standards.
We design experiences that convert and delight.
Using insights from discovery, our designers craft intuitive user journeys, wireframes, and visual prototypes that focus on performance and conversion. Every screen is optimized for accessibility, usability, and mobile responsiveness.
We make your app work smarter, not harder.
Our developers integrate essential tools and services: CRMs, payment gateways, analytics platforms, and third-party APIs to enhance functionality and streamline operations. Scalability, security, and performance are built into every layer of your web and mobile application.
Going live is just the beginning.
We manage deployment, hosting, and monitoring to ensure a smooth launch. Post-launch, we stay plugged in to track performance, gather user feedback, and roll out iterative updates. Our ongoing support ensures your custom mobile & web application continues to evolve as your business scales.
Most development teams hand over code and disappear. We’re different.
6th Man plugs in as your on-demand development team: designing, building, and optimizing custom applications that actually drive business growth.
We don’t just write code, we build growth engines. Every project starts with clear business goals, technical strategy, and user-focused design to ensure your application delivers real impact.
Your app isn’t just software, it’s a customer experience. We design interfaces and flows that keep users engaged, increase conversions, and support your growth objectives across platforms.
From load times to database architecture, every element of your app is optimized for performance and scalability. We use the latest frameworks to ensure your mobile and web applications run fast and scale effortlessly.
We connect your application to the tools you already use CRMs, analytics, payment gateways, and marketing platforms, so your data flows securely and efficiently across systems.
Need to pivot? Add a feature? No problem. Our modular development approach means your custom app can grow and adapt with your business, without starting from scratch.
We don’t hand over your app and walk away. Whether it’s project-based delivery or ongoing development, we stay plugged in to optimize, test, and enhance your product long after launch.
Arthur and his team built a website for us from scratch that is seamlessly integrated with all the new tools needed to compete effectively with our colleagues.
The dedication, drive, and knowledge that Arthur brings to the table. A true expert in his field, he always works in a very well-founded manner. He ensures that you achieve results and also explains in clear language how the results were achieved and where there is still room for improvement. His eye for detail and the speed and openness of mutual communication were excellent.
Sixthman assisted us with a specific recruitment campaign. We were very surprised by the speed of the results!
Sixth Man worked very proactively and meticulously on our campaigns. They provided a total package, from setting up the advertisements to management and detailed reporting.
