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Leeonex

Services

Software development services Leeonex delivers

Leeonex builds websites, MVPs, AI workflows, web and mobile apps, dashboards, and dedicated development support. Browse by category or by goal to find the specialty that matches your problem — then start with a clear first step.

What we build

Services shaped around the outcome you need.

Browse each category, then open a specialty when you already know the shape of the work.

Illustrative laptop workspace showing an Ads Manager example with a sponsored furniture ad

ChatGPT Ads Management

Run ads for your website in ChatGPT with campaign planning, creative, landing pages, conversion tracking, and ongoing management.

An agreed campaign scope, a clear media budget, and reporting you can act on.

Explore ChatGPT Ads Management

Capabilities

What comes with every engagement.

Architecture, security habits, and delivery practices that keep products reliable as they grow.

  • Websites & landing pages

    Clear structure, responsive builds, and lead capture that explain the offer.

  • MVPs & SaaS products

    Focused first versions with a technical base that can grow after launch.

  • AI automations

    Workflow-first AI with human checkpoints — used where it removes busywork.

  • Web & mobile apps

    Full-stack web apps and mobile clients connected to reliable APIs.

  • Dashboards & reporting

    Decision-ready views, filters, and visuals built on your real data.

  • Dedicated development support

    Extra capacity that plugs into your process — augmentation, squads, or rescue.

How we work

From idea to launch — without the fog.

Four clear stages. You always know the goal, the scope, and what ships next.

  1. Step 01

    Understand

    We clarify your goals, audience, workflows, and business priorities.

    Goals & context

  2. Step 02

    Plan

    We define the right scope, features, pages, integrations, and technical approach.

    Scope & approach

  3. Step 03

    Design & Build

    We create clean interfaces and reliable systems with practical engineering decisions.

    Working product

  4. Step 04

    Review & Improve

    We test, refine, and prepare the product for launch or the next development phase.

    Launch-ready build

Scope first. Clear timelines. Direct founder ownership from the first conversation.

Book a consultation

FAQ

Questions buyers ask before starting.

Testimonials

What Our Clients Say

Founders and product teams describe what changed after working with Leeonex — in their words, not ours.

Rated 5 out of 54.8 average15 client reviews
Marcus RendelFounder, Northbeam LogisticsRated 5 out of 5
Our dispatchers ran the whole depot off one shared spreadsheet that broke every Monday morning. Six weeks later they had a proper board. Nobody has opened that spreadsheet since.
Tobias LindqvistCTO, Verdal EnergyRated 5 out of 5
I have been burned by agencies before, so I kept the first contract deliberately small. We are three projects in now. The handover docs were good enough that my team took over without a call.
Daniel WeissOperations Director, Halden ManufacturingRated 5 out of 5
Eleven spreadsheets, gone. What sold me was that they spent two days on our factory floor before writing anything. The shift supervisors picked it up in an afternoon.
James OkoroEngineering Manager, Beacon FinancialRated 5 out of 5
I reviewed every pull request myself for the first month, expecting to find corners cut. I stopped after four weeks. My own team now writes tests the way theirs did.
Elena VasquezFounder, Terrace StudioRated 5 out of 5
I run a design studio and cannot read a line of code. They quoted in plain English and stuck to the number. That is the whole review, really.
Conor HylandGrowth Lead, Palladin SportsRated 5 out of 5
We were paying €6.40 a lead and the page was the bottleneck, not the ads. Same campaigns, new page, €2.90. I did not change a single keyword.
Owen MbekiHead of Demand Gen, Trestle SoftwareRated 4 out of 5
The first version underperformed our old page for about ten days. They rewrote the hero instead of arguing with me about it. It has beaten the old one every week since.
Greg TanakaVP Marketing, Ridgeway LegalRated 5 out of 5
Leads now reach our CRM and the duty solicitor's phone in the same minute. We used to find them in a shared inbox two days later. That gap was costing us real cases.
Marcus RendelFounder, Northbeam LogisticsRated 5 out of 5
Our dispatchers ran the whole depot off one shared spreadsheet that broke every Monday morning. Six weeks later they had a proper board. Nobody has opened that spreadsheet since.
Tobias LindqvistCTO, Verdal EnergyRated 5 out of 5
I have been burned by agencies before, so I kept the first contract deliberately small. We are three projects in now. The handover docs were good enough that my team took over without a call.
Daniel WeissOperations Director, Halden ManufacturingRated 5 out of 5
Eleven spreadsheets, gone. What sold me was that they spent two days on our factory floor before writing anything. The shift supervisors picked it up in an afternoon.
James OkoroEngineering Manager, Beacon FinancialRated 5 out of 5
I reviewed every pull request myself for the first month, expecting to find corners cut. I stopped after four weeks. My own team now writes tests the way theirs did.
Elena VasquezFounder, Terrace StudioRated 5 out of 5
I run a design studio and cannot read a line of code. They quoted in plain English and stuck to the number. That is the whole review, really.
Conor HylandGrowth Lead, Palladin SportsRated 5 out of 5
We were paying €6.40 a lead and the page was the bottleneck, not the ads. Same campaigns, new page, €2.90. I did not change a single keyword.
Owen MbekiHead of Demand Gen, Trestle SoftwareRated 4 out of 5
The first version underperformed our old page for about ten days. They rewrote the hero instead of arguing with me about it. It has beaten the old one every week since.
Greg TanakaVP Marketing, Ridgeway LegalRated 5 out of 5
Leads now reach our CRM and the duty solicitor's phone in the same minute. We used to find them in a shared inbox two days later. That gap was costing us real cases.
Marcus RendelFounder, Northbeam LogisticsRated 5 out of 5
Our dispatchers ran the whole depot off one shared spreadsheet that broke every Monday morning. Six weeks later they had a proper board. Nobody has opened that spreadsheet since.
Tobias LindqvistCTO, Verdal EnergyRated 5 out of 5
I have been burned by agencies before, so I kept the first contract deliberately small. We are three projects in now. The handover docs were good enough that my team took over without a call.
Daniel WeissOperations Director, Halden ManufacturingRated 5 out of 5
Eleven spreadsheets, gone. What sold me was that they spent two days on our factory floor before writing anything. The shift supervisors picked it up in an afternoon.
James OkoroEngineering Manager, Beacon FinancialRated 5 out of 5
I reviewed every pull request myself for the first month, expecting to find corners cut. I stopped after four weeks. My own team now writes tests the way theirs did.
Elena VasquezFounder, Terrace StudioRated 5 out of 5
I run a design studio and cannot read a line of code. They quoted in plain English and stuck to the number. That is the whole review, really.
Conor HylandGrowth Lead, Palladin SportsRated 5 out of 5
We were paying €6.40 a lead and the page was the bottleneck, not the ads. Same campaigns, new page, €2.90. I did not change a single keyword.
Owen MbekiHead of Demand Gen, Trestle SoftwareRated 4 out of 5
The first version underperformed our old page for about ten days. They rewrote the hero instead of arguing with me about it. It has beaten the old one every week since.
Greg TanakaVP Marketing, Ridgeway LegalRated 5 out of 5
Leads now reach our CRM and the duty solicitor's phone in the same minute. We used to find them in a shared inbox two days later. That gap was costing us real cases.
Priya RaghavanHead of Product, Cadence HealthRated 5 out of 5
I asked for a feature that would have taken three weeks. I got a call explaining why it was not worth building and what to do instead. That call saved us more than the retainer cost.
Amara OkonkwoMarketing Lead, FieldnoteRated 5 out of 5
Our old page converted at 1.2%. The rebuild sits at 3.4% on the same ad spend. I have stopped apologising for the link when I send it to press.
Sofia MarchettiCo-founder, Atlas RentalsRated 4 out of 5
We ran about a week late at the end. I heard about it the day it slipped, not the day it was due — which is more than I can say for the last two agencies we used.
Hana SatoProduct Owner, Mirai LearningRated 4 out of 5
Every Friday we got something we could actually click, not a status email. The time zone gap took a couple of weeks to settle, but after that I never had to chase anyone.
Rahul MehtaVP Engineering, QuantlyRated 5 out of 5
Eighteen months on, we are still adding to that codebase rather than working around it. Two engineers have joined since and neither needed hand-holding to ship.
Nadia BrekkeMarketing Director, Hallberg InteriorsRated 5 out of 5
Half our traffic is on phones and the old page took nine seconds to load on 4G. The new one is under two. Enquiries went up before we had touched the copy.
Isabelle FournierFounder, Maison ClairRated 5 out of 5
We had eleven days before the trade show. The page went live on day nine and we collected 340 emails at the stand. Nothing about it felt rushed.
Priya RaghavanHead of Product, Cadence HealthRated 5 out of 5
I asked for a feature that would have taken three weeks. I got a call explaining why it was not worth building and what to do instead. That call saved us more than the retainer cost.
Amara OkonkwoMarketing Lead, FieldnoteRated 5 out of 5
Our old page converted at 1.2%. The rebuild sits at 3.4% on the same ad spend. I have stopped apologising for the link when I send it to press.
Sofia MarchettiCo-founder, Atlas RentalsRated 4 out of 5
We ran about a week late at the end. I heard about it the day it slipped, not the day it was due — which is more than I can say for the last two agencies we used.
Hana SatoProduct Owner, Mirai LearningRated 4 out of 5
Every Friday we got something we could actually click, not a status email. The time zone gap took a couple of weeks to settle, but after that I never had to chase anyone.
Rahul MehtaVP Engineering, QuantlyRated 5 out of 5
Eighteen months on, we are still adding to that codebase rather than working around it. Two engineers have joined since and neither needed hand-holding to ship.
Nadia BrekkeMarketing Director, Hallberg InteriorsRated 5 out of 5
Half our traffic is on phones and the old page took nine seconds to load on 4G. The new one is under two. Enquiries went up before we had touched the copy.
Isabelle FournierFounder, Maison ClairRated 5 out of 5
We had eleven days before the trade show. The page went live on day nine and we collected 340 emails at the stand. Nothing about it felt rushed.
Priya RaghavanHead of Product, Cadence HealthRated 5 out of 5
I asked for a feature that would have taken three weeks. I got a call explaining why it was not worth building and what to do instead. That call saved us more than the retainer cost.
Amara OkonkwoMarketing Lead, FieldnoteRated 5 out of 5
Our old page converted at 1.2%. The rebuild sits at 3.4% on the same ad spend. I have stopped apologising for the link when I send it to press.
Sofia MarchettiCo-founder, Atlas RentalsRated 4 out of 5
We ran about a week late at the end. I heard about it the day it slipped, not the day it was due — which is more than I can say for the last two agencies we used.
Hana SatoProduct Owner, Mirai LearningRated 4 out of 5
Every Friday we got something we could actually click, not a status email. The time zone gap took a couple of weeks to settle, but after that I never had to chase anyone.
Rahul MehtaVP Engineering, QuantlyRated 5 out of 5
Eighteen months on, we are still adding to that codebase rather than working around it. Two engineers have joined since and neither needed hand-holding to ship.
Nadia BrekkeMarketing Director, Hallberg InteriorsRated 5 out of 5
Half our traffic is on phones and the old page took nine seconds to load on 4G. The new one is under two. Enquiries went up before we had touched the copy.
Isabelle FournierFounder, Maison ClairRated 5 out of 5
We had eleven days before the trade show. The page went live on day nine and we collected 340 emails at the stand. Nothing about it felt rushed.

Not sure which service fits yet?

Describe the goal, the workflow, or the rough idea. Leeonex will help you choose the right category and specialty — and what should come first.

No fake promises. Just clear product and engineering discussion.