Web app development

Web apps built for real workflows.

Internal tools, client portals, SaaS products and data platforms designed around real users, real workflows and the systems you already have.

A web app platform with dashboard, workflow, portal, mobile app, database and code

Selected teams I have worked with

  • Commons
  • Synnefa
  • Briink
  • LLInformatics
  • Be Indigo
  • UFODrive
  • Mirador
  • Unmind
  • Provenance

Platform

Web apps I build and where I draw the line

I build inventory tools, booking systems, client portals, SaaS MVPs, dashboards, and approval workflows. The focus is business software that replaces spreadsheets and email chains. For broader platform work, see the Webflow developer overview.

One unified web app for inventory, client access, SaaS reporting and approval workflows

Technical

The right stack for the job

The interface, data and automation should fit the product rather than force it into one platform. I use Astro or a custom front end for browser products, and Expo when an app needs a shared path across mobile and web. PostHog can help measure behaviour, while Vercel, Cloudflare and Resend support delivery and communication where they fit. I choose the simplest setup that meets the users, security and growth plan. See how I choose the stack.

A focused three-layer stack combining a web interface, structured data and automation

SaaS

SaaS development: from idea to paying customers

I ship the smallest version that proves demand, then add authentication, admin tools, and a heavier backend only when usage justifies it. This keeps the first release focused and gives later decisions real data.

A SaaS product evolving from lean MVP to scalable platform and an optimised paying-user product

Process

How I build web apps that teams actually adopt

Discovery starts with the workflow your team uses now. A working prototype reaches users early, so I can remove friction before the full build. The aim is a familiar tool that saves time from day one. See conversion optimisation.

Spreadsheet and email work transformed into a familiar real-time dashboard tested with actual users
Web App Process

From manual workflow to useful software.

  • Discovery and workflow mapping

    Map the current workflow and the best automation opportunity.

  • MVP build and user test

    Put a working prototype in front of real users and data.

  • Launch, monitor, iterate

    Ship the MVP and prioritise new features from actual usage.

Have a workflow that should be an app?

Show me the work that still lives in spreadsheets and email.

I can help turn the repeated steps into a useful product your team or customers can actually use.

Selected work

Selected websites, apps and connected systems

See all work
Testimonials

What clients say

"As I grow in my business, I need services to grow with, Derrick is that service when it comes to my website. He is patient, listens and takes onboard the changes I want in a timely manner. My website changes and develops with the needs of my clients and my offer which is great. He also brings new ideas and perspectives in how to improve and grow in line with my goals and business needs. I look forward seeing how this new phase develops."

Karin Young

Karin Young

Psychotherapist · Karin Counselling

Karin Counselling

"Derrick has been a great help in getting our SaaS website up and running. He is very knowledgeable in Webflow and was able to help us get the most out of the platform. His design skills are excellent and he was able to create a custom function-filled website that looks great and operates perfectly. I would highly recommend Derrick to anyone looking for a web designer who knows his stuff!"

Taita Ngetich

Taita Ngetich

CEO · Synnefa

Synnefa

"Derrick is just great to work with! He's super fast, always responds in a timely manner, and is very flexible with last-minute requests. His Webflow development skills are rock solid and he has no problems keeping up with the fast pace of early-stage startups."

Carla Nassisi

Carla Nassisi

Growth · Briink

Briink

"It has been a pleasure to work with Derrick! He delivered a pixel-perfect website for LLI, which not only looks and performs well but is also very organised and simple to maintain! During the process, he had the patience to clear all the incoming doubts that occurred when we were transitioning from one platform to another, and he not only delivered a great site but also tutorials on how to manage it."

Isabelle Krauze

Isabelle Krauze

UX Lead · LLInformatics

LLInformatics

"Derrick is a gem of a person and a wealth of knowledge. He was so patient and helpful when explaining the more intricate parts of Webflow and bouncing around different possible solutions. He really knows the ins and outs of Webflow — it's no wonder that he's a certified Webflow Expert! I'm looking forward to the day when I get to work with him again."

Diana Donaldson

Diana Donaldson

CEO · Be Indigo

Be Indigo

"Derrick helped us redesign and build our site on Webflow and we couldn't be more pleased with the entire project. Derrick is very easy to communicate with, fast and efficient, and takes time to ask questions and provide suggestions where necessary. He has a great balance of technical and visual knowledge, which helped us build a fast, SEO-optimized site that looks great and is on-brand. Would happily hire Derrick again!"

Eliza Gerland

Eliza Gerland

Strategic Marketer · UFODrive

UFODrive

"As I grow in my business, I need services to grow with, Derrick is that service when it comes to my website. He is patient, listens and takes onboard the changes I want in a timely manner. My website changes and develops with the needs of my clients and my offer which is great. He also brings new ideas and perspectives in how to improve and grow in line with my goals and business needs. I look forward seeing how this new phase develops."

Karin Young

Karin Young

Psychotherapist · Karin Counselling

Karin Counselling

"Derrick has been a great help in getting our SaaS website up and running. He is very knowledgeable in Webflow and was able to help us get the most out of the platform. His design skills are excellent and he was able to create a custom function-filled website that looks great and operates perfectly. I would highly recommend Derrick to anyone looking for a web designer who knows his stuff!"

Taita Ngetich

Taita Ngetich

CEO · Synnefa

Synnefa

"Derrick is just great to work with! He's super fast, always responds in a timely manner, and is very flexible with last-minute requests. His Webflow development skills are rock solid and he has no problems keeping up with the fast pace of early-stage startups."

Carla Nassisi

Carla Nassisi

Growth · Briink

Briink

"It has been a pleasure to work with Derrick! He delivered a pixel-perfect website for LLI, which not only looks and performs well but is also very organised and simple to maintain! During the process, he had the patience to clear all the incoming doubts that occurred when we were transitioning from one platform to another, and he not only delivered a great site but also tutorials on how to manage it."

Isabelle Krauze

Isabelle Krauze

UX Lead · LLInformatics

LLInformatics

"Derrick is a gem of a person and a wealth of knowledge. He was so patient and helpful when explaining the more intricate parts of Webflow and bouncing around different possible solutions. He really knows the ins and outs of Webflow — it's no wonder that he's a certified Webflow Expert! I'm looking forward to the day when I get to work with him again."

Diana Donaldson

Diana Donaldson

CEO · Be Indigo

Be Indigo

"Derrick helped us redesign and build our site on Webflow and we couldn't be more pleased with the entire project. Derrick is very easy to communicate with, fast and efficient, and takes time to ask questions and provide suggestions where necessary. He has a great balance of technical and visual knowledge, which helped us build a fast, SEO-optimized site that looks great and is on-brand. Would happily hire Derrick again!"

Eliza Gerland

Eliza Gerland

Strategic Marketer · UFODrive

UFODrive

"As I grow in my business, I need services to grow with, Derrick is that service when it comes to my website. He is patient, listens and takes onboard the changes I want in a timely manner. My website changes and develops with the needs of my clients and my offer which is great. He also brings new ideas and perspectives in how to improve and grow in line with my goals and business needs. I look forward seeing how this new phase develops."

Karin Young

Karin Young

Psychotherapist · Karin Counselling

Karin Counselling

"Derrick has been a great help in getting our SaaS website up and running. He is very knowledgeable in Webflow and was able to help us get the most out of the platform. His design skills are excellent and he was able to create a custom function-filled website that looks great and operates perfectly. I would highly recommend Derrick to anyone looking for a web designer who knows his stuff!"

Taita Ngetich

Taita Ngetich

CEO · Synnefa

Synnefa

"Derrick is just great to work with! He's super fast, always responds in a timely manner, and is very flexible with last-minute requests. His Webflow development skills are rock solid and he has no problems keeping up with the fast pace of early-stage startups."

Carla Nassisi

Carla Nassisi

Growth · Briink

Briink

"It has been a pleasure to work with Derrick! He delivered a pixel-perfect website for LLI, which not only looks and performs well but is also very organised and simple to maintain! During the process, he had the patience to clear all the incoming doubts that occurred when we were transitioning from one platform to another, and he not only delivered a great site but also tutorials on how to manage it."

Isabelle Krauze

Isabelle Krauze

UX Lead · LLInformatics

LLInformatics

"Derrick is a gem of a person and a wealth of knowledge. He was so patient and helpful when explaining the more intricate parts of Webflow and bouncing around different possible solutions. He really knows the ins and outs of Webflow — it's no wonder that he's a certified Webflow Expert! I'm looking forward to the day when I get to work with him again."

Diana Donaldson

Diana Donaldson

CEO · Be Indigo

Be Indigo

"Derrick helped us redesign and build our site on Webflow and we couldn't be more pleased with the entire project. Derrick is very easy to communicate with, fast and efficient, and takes time to ask questions and provide suggestions where necessary. He has a great balance of technical and visual knowledge, which helped us build a fast, SEO-optimized site that looks great and is on-brand. Would happily hire Derrick again!"

Eliza Gerland

Eliza Gerland

Strategic Marketer · UFODrive

UFODrive
Have something to build or improve?

Let's talk about it

Need a website or app built, improved, managed or automated? Tell me what is getting in the way and I'll get back the same working day.

A few useful details

A rough overview is enough to get started.

I usually reply within two working days.

Web App Development FAQs

MVP scope, timing, pricing, integrations, and support.

A website presents information. A web app lets users manage data, complete tasks, or run a workflow. If users log in and interact with data, it is a web app.

A focused MVP typically ranges from £5,000-£15,000. Multiple roles, real-time data, or complex workflows are quoted after discovery.

A focused MVP usually takes 4-6 weeks. Larger products take 8-16 weeks and ship in usable phases.

Yes. I work with Airtable, Google Sheets, SQL databases, and REST APIs. The interface can stay independent of the data source.

Yes. I set up hosting, monitoring, backups, and admin access for the frontend and backend.

need a hand?

I build websites and apps

I work across product marketing and engineering, turning ideas into useful digital products and improving how they perform after launch.

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