Replace manual workflows, connect disconnected systems, or give customers a better digital experience.
Independent software developer · Worldwide
Software built around the way your business works.
I help businesses and founders turn demanding ideas into reliable web applications, mobile products, and connected systems—without unnecessary complexity.
01
One developer, directly accountable from first conversation to launch.
What I build
Engineering for the work that matters.
Whether you are launching a new product or improving an existing system, every engagement starts with the business outcome—not a preferred technology.
01
Web application development
Fast, secure web products built around real business workflows.
↗02Mobile app development
Useful mobile experiences for iOS, Android, and cross-platform teams.
↗03Automation & integrations
Less repetitive work. Cleaner data. Systems that work together.
↗04Software modernisation
Improve an existing product without putting the business at risk.
↗How I work
Clear decisions.
Visible progress.
No black box and no endless build phase. You see what is being decided, why it matters, and what is ready next.
My approach- 01
Understand
Clarify the users, constraints, risks, and measurable result.
- 02
Shape
Choose the smallest sound solution and make the roadmap visible.
- 03
Build
Deliver in working increments with practical testing and feedback.
- 04
Launch
Deploy, document, monitor, and leave the product ready to evolve.
A good fit
Bring me the problem that has been sitting between “important” and “too hard.”
Move from idea to a credible first product with clear technical choices and a path beyond launch.
Add focused engineering capacity for a feature, integration, migration, or performance challenge.
Meet the developer
Work directly with the person responsible for the code.
I’m YiKai Tang, an independent full-stack developer working directly with clients from the first technical conversation through delivery and handover. YK is my personal brand, not a company or agency.
There are no account-management layers and no handoffs to an unknown team. You get clear technical judgement, honest constraints, and one accountable developer who understands both the code and the outcome it needs to create.
Full-stack deliveryEnglish & Chinese communicationClients worldwide
More about me ↗Client feedback
Trusted for the judgement behind the code.
Verified five-star feedback from completed and ongoing software development engagements. Client identities are kept private here.
★★★★★5.0“Asked him to scope a WeChat Work automation. Instead of quoting, he read the platform’s official API documentation, explained why the core feature could not be built as specified, and proposed a workable alternative. That honesty saved me from selling a client something undeliverable. On the paid test he shipped the code, README, screen recording, and time log without being chased. If a developer tells you what will not work before you pay them, keep them.”
★★★★★5.0“YiKai had been such a delight to work with. I would not hesitate to work with him again, and if you are looking to hire a developer I would highly recommend considering him for your project.”
★★★★★5.0“YiKai did an outstanding job on the frontend development for my project. His communication was clear and consistent, and he moved faster than expected without sacrificing quality. He understood the requirements right away and delivered clean, well-structured work that matched exactly what I was looking for. He was proactive, detail-oriented, and easy to work with throughout the entire process.”
★★★★★5.0“I have an ongoing working relationship with YK. We have moved from an hourly rate to a set fee basis. Other than that, nothing has changed. He continues to provide a 5 star service.”
Start with a conversation
Tell me what needs to work better.
Ready when you are