Futuristic solutions
Practical use of current platforms so the product stays useful after launch, not a one-off demo.
UK IT Agency
Mobile and web application
development expert
Custom web, mobile and software development for startups, SMEs and enterprises. One UK team, a written brief, and we keep the code and the delivery in the open.
Start a projectTechnical expertise
Web, mobile and software engineers who can choose a stack and defend it in the scope.
Domain knowledge
Healthcare, retail, logistics, finance and the other sectors listed on this site, not a generic pitch.
Skilled resources
Designers, developers and QA on the project as one team, not a chain of subcontractors.
Web and mobile development services to build future-ready apps
Mobile development
Native, cross-platform or PWA mobile apps from our UK IT agency. We choose the stack from the brief.
ExploreEmerging technology
SJ Technologies is a UK IT agency providing emerging technology alongside web and mobile development.
ExploreWeb development
Customer and staff web applications from our UK IT agency. We choose the tech stack from the requirement.
ExploreSoftware development
SJ Technologies is a UK IT agency providing software development alongside web and mobile development.
ExploreEcommerce solutions
SJ Technologies is a UK IT agency offering ecommerce solutions for online retail and trade.
ExploreOpen source customisation
SJ Technologies is a UK IT agency offering open source customisation for CMS and commerce platforms.
ExploreDelivered Web & Mobile Projects Across Industries
SJ Technologies’ web and mobile app work spans sectors, companies and geographies, with a written brief and a date you can hold us to.
Our process
How We Work
We start with a clear understanding of the brief, then design, build and release. One UK IT team, a written strategy, and a collaborative path from the first workshop through to launch and support.
Analyse
Industry expertise and research techniques to provide insights and develop a clear strategy.
Design
Create a beautiful, highly functional and intuitive design with your specific users in mind.
Develop
Fast, fluid development for web and mobile, on the platform and stack agreed in the brief.
Deliver
We bring products to market with proper support and optimisation for the final launch.
Healthcare Harbour Clinic Our Clients
Our clients speak for us
The diary is the same one reception sees. Patients book without calling, and we are not chasing a shared inbox for double-booked slots.
Daniel VantClient · UK
Latest News
Get the latest insights
Articles from the agency on custom software development, mobile apps, web applications, AI and related delivery.
Custom software development: when to build, what it costs, how to scope it
Custom software development is the right path when a product, a workflow or a set of integrations will not fit a package. Here is how a UK IT agency scopes, prices and delivers it.
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Mobile app development in 2026: native, cross-platform or a PWA
Mobile app development still starts with the same question: native iOS and Android, a cross-platform stack, or a progressive web app. The answer is the product, not the fashion.
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Web application development for business: architecture that lasts
Web application development is how most business software still ships: a browser product with a real backend, not a brochure site. Here is how to brief it so it can be run in three years.
Read moreGet in Touch
Are you looking to digitally transform your business?
Tell us about the web application, mobile app or software you need. We will reply within two working days.