A personal partner in software development

Experienced senior full-stack developer and past CTO on-demand, part time and without risks for hiring and full-time

Services

Develop

I can develop for you as individual, delivering full prototypes, MVPs or projects.

Or, I can join your team as a member and work on an hourly basis.

Although I’m able to work in many stacks and languages my current strengths lie in GCP, Postgresql, Flutter and Vue/Svelte.

Lead

Build teams
Set practices and standards
Mentor

Advise

I can develop for you as individual, delivering full prototypes, MVPs or projects.

Or, I can join your team as a member and work on an hourly basis.

Although I'm able to work in many stacks and languages my current strengths lie in GCP, Postgresql, Flutter and Vue/Svelte.

A person, not an agency

Although I do business under the name of Greycastle, the projects and services presented on this site are all provided by me, David Dikman.

As such there is a limit to the range of products I can deliver in entirety but I join teams both as a engineer, advisor and team member.

If and when needed, I join your team or help you build one to work on larger projects or we bring in short-term help to fill any gaps my skillset lacks.

David has a wealth of knowledge and is one of the most resourceful developers we’ve encountered. He takes swift action, works in a structured manner, and communicates effectively, making him easy to collaborate with.

Bude Piccin, founder tastermonial.com

David is a guy you want to hire. He is extremely competent. He can understand what is needed, can develop a solution strategy, can write excellent code, is highly available and has superior communication skills. The project he worked on required digging into a service provider's intricate access requirements. He aced it and produced a great app that met our needs. I really enjoyed working with him. We will definitely be using him in the future.

Dr. Brad Logan, owner ixchelskin.com

David assisted me with developing an MVP for my startup. He was very good at letting me know what might take more time to do and what might be easy and was very helpful in the prioritisation. David has great knowledge of Flutter and Firebase and was fast in working with these technologies. It has been great to work with David and I highly recommend him.

Morten Olsen, founder edumo.io

See more at my Upwork profile

Projects

Aside from working on a consultation basis, I build and run a few projects of my own. This both gives me creative freedom and a chance to train and apply my skills.

See all projects