Web app developer for hireAvailable now
A web app developer who treats your product like his own.
I build web applications for companies that need more than a website: customer portals, admin dashboards, SaaS products, calculators and internal tools. Full-stack, from database to UI, designed to be maintained for years rather than launched and forgotten.
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Is this a fit?
An honest fit check before we talk
I would rather tell you no on the first call than waste your budget. Here is what a good match looks like for this kind of work.
A good fit if
- You need a customer portal, dashboard or internal tool and want one senior developer to own it.
- You are building a SaaS product and want working software early, not a big reveal in six months.
- You have a proven calculation engine, spreadsheet or legacy system that needs a modern web UI on top.
- You want someone who understands the business problem first and chooses the technology second.
Probably not a fit if
- You need a brochure website in WordPress or Webflow. There are better and cheaper options for that.
- You want a fully staffed agency with design, content and marketing in one contract.
- You need the lowest price rather than the lowest total cost.
What I do
What the engagement typically covers
- Scoping and proposal
- A free intro call, then a short written proposal with scope, approach, timeline and price. No code until we agree on the goal.
- Full-stack build
- React or Vue frontend, Node.js and REST APIs, SQL database, authentication, payments and integrations. TypeScript end to end.
- Hosting, CI and launch
- Deployment on Vercel or your cloud, automated tests and CI, monitoring, and a launch that does not need a war room.
- Support and further development
- Documentation and handover, then ongoing development on a retainer if you want to keep building.
Proof
Clients who kept me around
Web applications in climate tech, construction, pharma and e-commerce, and how long each client kept me.
Målbar
Full-Stack Developer · Freelance
Ongoing development for a Danish life cycle assessment company. I have helped build their LCA screening tool, which lets companies estimate the climate footprint of their products, along with the internal tooling the team runs on every day.
Read the case studyBunch Bygningsfysik
Full-Stack Developer · Freelance
Built a moisture content calculator for construction compositions. Their existing calculation module already had years of building physics expertise baked in, so I kept it as the engine and put a modern, easy to use web UI on top of it instead of rewriting what worked.
Read the case studyY-mAbs Therapeutics
Full-Stack Developer · Freelance
Full-stack development of web solutions for a commercial-stage biopharmaceutical company, a regulated environment where reliability, correctness and clear documentation are not optional.
Read the case studyStorebuddy
Frontend Developer · Freelance
Frontend for a platform that automates bookkeeping for webshop owners and flags imbalances on orders, turning messy e-commerce data into something an accountant can trust.
Read the case study
Process
How we'll work together
The same four steps for a two-day fix and a two-year engagement.
Intro call
A free 30-minute call where you tell me about your project, goals and constraints. I ask a lot of questions and tell you honestly whether I'm the right fit.
Proposal & estimate
You get a short written proposal: scope, approach, timeline and price. Fixed price for well-defined projects, hourly or retainer for ongoing work.
Build in the open
Short iterations, working software early, and a weekly update you can actually read. You see progress and can change course before it gets expensive.
Launch & support
I handle deployment, hand over clean documentation, and stick around for support and further development if you want me to.
FAQ
Questions I get asked
- Which technologies do you use?
- TypeScript, React and Next.js or Vue and Nuxt on the frontend, Node.js and REST APIs on the backend, SQL databases, Tailwind CSS, and Vercel or cloud hosting. I pick within that set based on your team and product, not on trends.
- Can you work from a design, or without one?
- Both. I work well with your designer or an existing design system. For internal tools and MVPs I can design a clean, usable interface myself, as I have done for my own products.
- How long does a web app take?
- A focused MVP or internal tool is typically four to ten weeks. Larger products are built in stages so you have something in production early. You get a timeline in the proposal.
- How do you price work?
- Fixed price for well-defined projects, hourly or a monthly retainer for ongoing work. My preferred engagement is 20-40 hours a week for six months or more. Rates are in the proposal, not on the site, because they depend on the scope.
- Is one developer a risk for us?
- Code lives in your repositories from day one, written so the next developer can pick it up. Documentation and handover are part of every engagement, not an extra. My track record is long tenures, which is continuity, not dependency.
- What happens after launch?
- I stick around. Most of my clients have kept me for one to six years, first for the build and then for support and further development. A retainer of reserved weekly hours is the usual shape, but ad hoc work is fine too.
Contact
Tell me what you are building
What it is, roughly when it needs to exist, and what a great result looks like. I usually reply within a day, and the first 30-minute call is free.
hello@perhp.com