Hire experts in Kotlin in London, UK

"I worked with Daniel as one of our lead engineers on a military FPV drone training simulator built in Unreal Engine 5, a high-stakes project that needed to go from rough prototype to demo-ready in seven weeks for a live demonstration at IITSec 2025. The biggest technical win on the project was the drone flight dynamics..."

"I worked with Daniel as one of our lead engineers on a military FPV drone training simulator built in Unreal Engine 5, a high-stakes project that needed to go from rough prototype to demo-ready in seven weeks for a live demonstration at IITSec 2025. The biggest technical win on the project was the drone flight dynamics system. Getting simulated flight to feel believable to real drone pilots is genuinely hard, and Daniel owned that problem end to end. He delivered it on a tight timeline and it held up. Beyond the technical work, Daniel was a key contributor in the truest sense. He regularly unblocked other developers, stepped into hard problems without being asked, and kept things moving when they could have stalled. He's organized, communicates clearly, and brings a level of institutional knowledge you only get from working on large, complex projects. That kind of experience showed up constantly. He also took time to mentor the junior developers and helped us establish code quality standards that made the whole codebase easier to work in. If you're building something complex and need someone who can do the hard technical work and help the team around them do the same, Daniel is worth your time."

"David is a very wonderful person to work with.... Pays attention to details, has good communication skills and knows his way around situations"

"The project I worked on is SmartFinance Automation System, developing a financial app using C#, .NET, ASP.NET, and AI. I built an AI module for cash flow predictions, improving reporting accuracy and decision-making."

"Zaryab helped me implement a full-page cookie consent blocker on my website, and the results were exactly what I needed. He made sure users can’t interact with the page until they accept marketing cookies, and everything works flawlessly — including setting a custom ads_consented=true cookie and preventing the Facebook..."

"Zaryab helped me implement a full-page cookie consent blocker on my website, and the results were exactly what I needed. He made sure users can’t interact with the page until they accept marketing cookies, and everything works flawlessly — including setting a custom ads_consented=true cookie and preventing the Facebook Pixel from loading until consent is given. Super responsive, knowledgeable, and delivered the work fast. If you need help with GDPR compliance or cookie tracking, Zaryab’s your guy. Highly recommend!"

"Binh Nguyen Van was great to work with. They really listened to my needs and all work was delivered on time."

"Working with you was an outstanding experience. The portfolio site you created exceeded my expectations in both design and functionality. Everything was professionally structured, fast, responsive, and visually impressive. I especially loved the clean UI, smooth user experience, and attention to detail. You didn’t just..."

"Working with you was an outstanding experience. The portfolio site you created exceeded my expectations in both design and functionality. Everything was professionally structured, fast, responsive, and visually impressive. I especially loved the clean UI, smooth user experience, and attention to detail. You didn’t just build a website — you created a strong online presence for my brand. Communication was excellent throughout the project, and every feature was delivered perfectly. I highly recommend your services to anyone looking for a skilled and reliable web developer."