Dileepa Ranawake

Dileepa Ranawake

Full-stack software engineer · Hull, UK

Hi, I'm Dileepa. I help you get ideas off the ground, build custom tools shaped around the way you work, and help you understand where AI fits.

My background is building startups and developing products. I co-founded Sumrise, an AI accessibility startup.

I help you decide what to build, not just how to build it.

What I build

What I build

It starts small, with a first working version you use and then change.

  1. Get ideas off the ground

    A lean first version, without bloat that might cost you later.

  2. Custom tools

    Custom doesn't have to mean big. It can be one job your current tools do badly, done well.

  3. Find where AI fits

    AI workflows that take away the friction, so you can focus on doing what you do.

  4. Improve existing apps

    Add features, fix bugs, refactor and stabilise the code.

I spot the biggest technical risks early, and turn what your business needs into engineering choices that fit.

My core skills

Technical

  • TypeScript
  • React
  • Next.js
  • PostgreSQL
  • OpenAI API

Product and people

  • Product discovery
  • User research
  • Accessibility
  • Mentoring

Ways of working

  • Agile
  • Lean, iterative delivery

All my skills

Frontend+7 moreLessTypeScriptReactNext.js
  • JavaScript
  • Redux
  • React Query
  • HTML
  • CSS
  • Tailwind
  • Accessibility (WCAG and ARIA)
Backend+4 moreLessNode.jsREST APIsExpress.js
  • Google OAuth (BetterAuth.js)
  • HttpOnly sessions
  • Zod validation
  • Role-based access control
Databases+3 moreLessPostgreSQLDrizzle ORMSQL
  • SQLite
  • Neon (managed PostgreSQL)
  • Schemas and migrations
AI and LLMs+1 moreLessLLM features with the OpenAI APIMCP serversEvaluating model output
  • Prompt and response judgement
Testing and deployment+5 moreLessVitestTDDDocker
  • Jest
  • GitHub Actions
  • Vercel
  • Fly.io
  • Secrets management
Product and UX+6 moreLessProduct discoveryUser researchPrototyping
  • Figma
  • Wireframes
  • User-centred design
  • Data-informed design
  • Customer development
  • PostHog analytics
Ways of working+5 moreLessLean, iterative deliveryAgileKanban
  • Scrumban
  • Scrum
  • Product-engineering alignment
  • Stakeholder communication
  • Cross-functional collaboration
Code practices+2 moreLessModular designSeparation of concernsDRY
  • OOP
  • Value-driven development
Leading and teaching+2 moreLessMentoringRemote team leadershipPublic speaking
  • TEDx and university talks
  • Mentoring students and startups

My story

My story

  1. The start

    I've always been a builder. As a kid I built planes, rockets and catapults.

  2. The spark

    At C4DI, Hull's tech community, I was working with so many entrepreneurs and startups, and engineers building really interesting things. I made a Pixel robot and did the NASA hackathon, and that really sparked my love for startups and software engineering.

  3. Startups

    I ran a health tech company and co-founded Sumrise. That's where I really developed my startup process and skills.

  4. A turning point

    Being diagnosed autistic was a huge change in my life. It gave me real perspective on how I want to apply my strengths, and how I want to build.

    If my dyslexic ADHD brain gives me creativity, my autistic brain gives me rigour and depth.

  5. Engineering focus

    That, and building Sumrise's first prototype myself, moved me into engineering. I retrained over several years: Codecademy, my own projects, and building lots of things.

  6. Now

    I run a software engineering and product consultancy. I help people get their ideas off the ground, and work with small teams on tools shaped around the way they work.

What I care about

  • Accessibility and interface innovation
  • Education and ed tech
  • Healthcare
  • Building things that matter

How I think

How I think

A great product delights the people who use it, does something important for you, and fits your budget, your business and your constraints.

EngineeringBusinessYour productUsersAccessibilityWhen to scale
  • Many lenses

    Engineering is always at the heart of what I do. Equally important, I think about what I build, and work with you, through different lenses.

    What your business needs, how it delights the people who use it, how it fits your product, your users, accessibility, the right time to scale, and when to pare it down to the smallest thing.

  • Startup thinking

    Founding startups teaches you to keep things lean. Y Combinator's Startup School taught me to ship the smallest thing, to find out what's actually most important. Overbuilding early adds cost and makes it really difficult to get good data. Cambridge Judge Business School refined my thinking about business. How I break a build into slices

  • Honesty

    I care about honesty. I tell you what I can and can't build.

From my blog

Who I work with

Who I work with

Entrepreneurs, small teams and charities.

We'll work well together if you

  • Have a need and a shape for it, but don't quite know how to pull it together
  • Are early, and ready to take that big step
  • Think lean and entrepreneurial
  • Value depth and rigour, and care who you work with
  • Want an engineer with a broad range, who can contribute to the whole thing
  • Want to build something really cool together

I'm probably not the right fit if you

  • Want the cheapest build possible, or too muchI don't want to overpromise and underdeliver. I'd rather quote and spec minimally, take a careful approach and build more than I said, than the other way around.
  • Are very set on what and how, and don't want an engineer and partner shaping the buildIt can lead to painful decisions or a poor product, and I don't want to build something you'll regret.
  • Don't care about quality

How I communicate

  • I'm direct, and I appreciate it when you're direct with me too. I'm not always great at reading between the lines.
  • If you have your own ways of communicating or working, let me know. I'll fit how we work to you and your process.

What I've done

What I've done

Things I've built

Talks and teaching

More talks

Talk · Hull University Business School · Oct 2020

Learning to fly: succeeding in the early stages of a startup

Talk · C4DI · 2021

Surviving the tsunami: how businesses can adapt to survive by thinking like a startup

Talk · Hull University Business School · 2021

How to get started: four steps to help you build your first startup

Other work

Managing director

Kinata

I ran a health tech company: a clinical platform serving doctors, hospitals and patients across London.

Trustee

HEY Smile Foundation

I made equality, diversity and inclusion a standing board topic.

Community manager

C4DI

I ran Hull's tech community: developer meetups and hackathons for 1000+ members and startups.

My full history is on LinkedIn (opens in a new tab)

What people say

Outside work

Outside work

Family, photography, the outdoors and music.

Dileepa on open moorland under a grey sky, camera in hand, looking down at his black and white dog
Hiking in the Peak District with our dog.
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She's a little trooper: we adopted her, and she's survived cancer twice.

His daughter, seen from behind, building with colourful magnetic tiles on a radiator, a small wooden robot on the window sill
A proud dad.
Close-up of an elephant's face: an amber eye and a deeply wrinkled trunk
I like photography.
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This is an elephant I photographed in Sri Lanka.

Dileepa, small in the frame, walking a forest track in morning light, sun rays through the trees
That's me, on a tripod and timer.
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In one of my favourite woodlands, with one of my first cameras: a point-and-shoot I got for my birthday. The lens was scratched, so I polished it with toothpaste first.

Black and white photo: muddy wellies beside the dog's spotted legs in little dog boots
Some more photography.

Other things I love

Things I make

I build things outside code, too.

A low floor desk under a window, with a monitor, a laptop and two speakers, and a split keyboard on a movable arm above a floor mat
When I got arthritis in my hip, I built my own floor desk.
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And a movable split keyboard, and a tool to map its layers (opens in a new tab).

A large abstract painting in a light wooden frame: loose strokes of blue, red, green and white
An acoustic absorber I designed and engineered.
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And my first artwork with my wife: the engineering and the art combined.

A table lamp made from a round block of wood, a large filament bulb glowing on top
I built this lamp for my mum.
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I love working with wood sometimes. This one's from a bit of wood a friend kindly donated.

A small Japanese black pine in a pot of moss, raindrops on its needles
I love bonsai. This one's my little Japanese black pine.
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I've also got an oak one I'm experimenting with.

I play guitar, too.
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This is my song. Press the picture to play it.

Let's talk

Thanks for reading about me. Hopefully there's something I can do to help, so feel free to get in touch.

Have an idea for an app, a tool or a new feature?

Tell me what you'd like to build or achieve, and let's chat. The first 30-minute call is free, no commitment.