Services / Custom Software Development
Custom Software
built around your business
We design and build tailor-made software that fits how your business actually works — replacing spreadsheets, glue code and off-the-shelf tools that no longer keep up.
Overview
Know these growth barriers?
Problems we solve
Spreadsheet chaos
We build one coherent environment where your data stays organised, accessible and up to date.
Repetitive tasks
We replace repeatable manual work with automated flows and integrations.
Information flow
We map and streamline your processes so information moves freely across the company.
Errors
Automated systems cut the risk of mistakes and improve the quality of your data.
Scalability
We design flexible solutions that grow together with your business.
Costly processes
Manual work slows you down and adds cost — automation trims both and speeds things up.
Who It's For
You've outgrown spreadsheets
Manual files and disconnected tools can't keep up anymore.
The process is core to your business
It's how you make money — and generic tools force clumsy workarounds.
You need your tools to talk to each other
Your data sits in separate systems that don't connect.
You're planning to scale
You want software that grows with you — fully owned, no lock-in.
Proof, not just promises
- 120+
- Systems shipped to production
- 8 yrs
- Building custom software
- 94%
- Clients who come back for more
- 3 days
- To a first working version
What Can We
Build for You?
From a single internal tool to a full platform — custom software shaped around your processes, data and goals.
Web Applications
We build modern, high-performance web apps on Next.js and React — with a refined user experience and real value for your business.
- Dynamic content management
- Custom forms & information flows
- User & account management
- Third-party system integration
- Real-time updates
Mobile Applications
We build cross-platform mobile apps in React Native that cut delivery time and reduce rollout costs.
- iOS & Android from one codebase
- Native device feature integration
- Offline mode
- Push notifications
- Full analytics
Enterprise Applications
We design dedicated enterprise applications that streamline processes and boost organisational efficiency.
- Process automation
- Data management
- Access control
- Reporting & Business Intelligence
- Audit & compliance
Turn a note into a post
Ready to publishGrateful for the opportunity to attend AI DevSummit 2026 in 🇩🇪 Berlin and co-host a session with our partner doubleuprompt and the people who made it click: Kamil & Michael. 🤝 Alongside supporting the event, I also recorded several interviews with industry experts (and welcomed the first guest on our podcast, Juliet 🎙️), gaining real insight into AI-driven software and the future of how we build. A great experience connecting with founders and seeing innovation in action. Excited for what's next! ❤️🔥 Huge thanks to the doubleuprompt crew 🤝 #AIDevSummit #SoftwareHouse #AI #Innovation #doubleucode
System Integration & APIs
We connect the tools you already use and build the APIs that let your systems talk to each other.
- REST & GraphQL APIs
- Third-party & ERP/CRM integration
- Webhooks & event pipelines
- Data migration & sync
- Secure authentication (SSO, OAuth)
Legacy Modernisation
We rebuild or extend ageing systems on a modern stack, without disrupting the business that depends on them.
- Incremental rewrites
- Data extraction & migration
- API layer over legacy systems
- UX & performance overhaul
- Zero-downtime cutover
gateway5/5
Not sure what you need to build? Tell us the problem — we'll help you scope the right solution.
Contact Us
Custom Software
Across Industries
Fleet & delivery management system
A custom platform to plan routes, track deliveries and manage drivers — replacing a tangle of spreadsheets.
Patient scheduling & records platform
A bespoke system for appointments, records and billing, built around strict access control and compliance.
Back-office platform for a fintech
An internal operations tool with approvals, audit trails and integrations to core banking systems.
Production & inventory system
A tailored system connecting the shop floor, inventory and orders in real time for a manufacturer.
Connected device & telemetry platform
A platform to monitor hardware fleets in real time — device telemetry, alerts and remote configuration in one place.
Learning & student management platform
A tailored platform for courses, enrolment and progress tracking — connecting students, tutors and admins in one place.
Built once, runs everywhere. One system instead of the spreadsheets, inboxes and half-manual steps your teams run today — in every location and on every shift.
The impact, in numbers
$25M+
Revenue & savings unlocked for clients
40k+ hrs
Manual work removed every year
18×
Faster on the workflows we rebuilt
3.5×
Average first-year ROI
We had an idea for online learning, but we were handling every student by hand. doubleucode built a platform where enrolments, progress and reports run themselves — we just teach. Paperwork that used to take two days is now done in fifteen minutes.
Pasjonaci IT
Learning platform for students
We design smart factories, so our own processes had to keep up. We got a system that ties production, inventory and orders into one place — no more ten spreadsheets and guessing where we stand.
Smart Factory Design
Production & inventory system
We came with an idea for an app that scans a business card and instantly tells you who you're talking to. The first working version was on phones in a few weeks — we tested it in real meetings before anyone else would have finished the brief.
Kardlyfy
Mobile app — business-card scanning & company insights
How our collaboration works
01
First contact
We check whether we can help you.
02
Online consultation
We learn the problem and match the right solutions.
03
Order
You accept the terms and we kick off the project.
Choose Your
Development Approach
Three simple ways to work with us. Pick the one that fits your project — and if you're not sure, we'll help you choose.
Our Estimation Process
Discover & Understand
We start with a focused conversation about your business objectives, the people you serve, and the constraints you're working within. Together we define what a successful outcome actually looks like.
Analyze & Prepare
From there, our team maps out the requirements, the technical scope, and the trickier parts of the build. That work feeds a concrete proposal covering the roadmap, timeline, and the pricing models that fit best.
Present & Refine
Then we sit down and walk you through it. We explain the thinking behind each recommendation and refine the plan around your feedback, iterating until you're fully confident in the direction.
Fixed Price
Best for
- Smaller projects
- You already know what you want built
- Requirements that won't change much
- A one-off delivery
One agreed price for a clearly defined project — you know the full cost before we start.
Ballpark
Projects start around ~$8k.
Key benefits
- You know the full price up front
- Everything we'll deliver is written down
- No surprise costs
- A fixed deadline
Flexible – Pay as you go
Best for
- Longer projects where the plan may shift
- You're still figuring out the details
- You want to adjust priorities as you go
- Trying out and testing new ideas
For projects that will evolve. You pay for the hours we actually work and can change direction anytime.
Ballpark
You're billed only for time worked — from ~$30/hr.
Key benefits
- Change what's being built whenever you need
- Decide as you go, no rigid plan
- Pay only for work that's done
- See exactly where the hours go
Dedicated Team
Best for
- Large, ongoing products
- You want a team that feels in-house
- Continuous improvement over time
- A long-term partnership
Your own developers working only on your product — like an in-house team, without the hiring.
Ballpark
Billed monthly — one dedicated developer from ~$4.8k/mo (~$30/hr).
Key benefits
- Manage the team like your own staff
- They learn your business deeply
- Scale the team up or down anytime
- A committed, long-term partner
- More consistent quality and speed
Not sure which approach is right for your project? Schedule a consultation with Kamil.
Frequently Asked
Questions
Can't find the answer to your question? Just send me an email:
Ask me a questionWhat is custom software development?
It's building software tailored to your specific business — your processes, data and goals — instead of adapting your business to an off-the-shelf product. You get exactly the features you need and full ownership of the result.
When does custom software make more sense than off-the-shelf?
When existing tools force awkward workarounds, can't integrate with your systems, or don't scale with you. Custom software pays off when the process is core to your business and a generic tool holds it back.
Do I own the code?
Yes. At the end of the engagement we hand over the full repository and documentation. The code is yours, on a standard, portable stack with no lock-in.
Can you work with our existing systems?
Absolutely. We integrate with the tools and databases you already use, build APIs on top of legacy systems, and migrate data safely with minimal disruption.
What support do you offer after launch?
We provide ongoing maintenance, monitoring, new features and technical support, and can scale the system further as your business grows.
Is my data safe?
Yes. We build on enterprise-grade infrastructure from providers like Microsoft, Amazon and Google, follow security best practices and recognised certifications, and keep everything GDPR compliant.
How can I be sure it will work for us?
Before we build anything, we study how you actually work. In the discovery phase we create prototypes and run tests that show — in your own environment — exactly how the solution will behave, so there are no surprises later.
Will the investment pay off?
We only take on projects that make financial sense. We start with the work that returns the most value first, and we never build something just for the sake of it — every part has to earn its place.
How long does it take to build?
It depends on how complex the processes involved are. Longer projects are broken into smaller stages, and every one to two weeks we ship a working module you can start using right away.
Do I need to be technical to use it?
Not at all. Most of our software is used by people with no technical background, so we design it to be easy for anyone. You also get clear instructions and hands-on support after launch.