We build and support complex software and help organisations adopt AI with confidence.
Ruby on Rails engineering, fractional CTO support and practical AI consulting for businesses, non-profits and government agencies.
For 17 years, we have built and maintained digital services for businesses, regulated organisations and government. We can work alongside your team or take responsibility for delivery and ongoing support.
Speak to our senior team about your software or AI plans. We’ll help you assess your options and decide what to do next.
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Where do you need help?
Start with your priority
Choose the service that fits the decision or delivery problem in front of you.
AI consulting and business automation
Assess the workflow, data and consequences of mistakes before committing to a build. Test whether AI is useful, then plan its integration and human oversight.
Technical decisions need an owner
Get experienced help with technology choices, delivery priorities and technical risk. Define the leadership gap alongside the people already responsible for your software.
An existing Rails application needs attention
Take over support, plan an upgrade or make an application easier to maintain. We can work with your team or an outgoing supplier. Planning a new application? Explore Rails development.
Why Bit Zesty?
Why work with us?
A senior product, design and engineering team for complex software, practical AI and the long-term support needed to keep both delivering value.
17 years of complex delivery
We build new digital services, improve inherited systems and provide ongoing support. Read how we took over and maintained the Serious Readers Rails application.
Security and quality built in
We are ISO 27001 and Cyber Essentials Plus certified, and have delivered services to the GOV.UK Service Standard. Review our technical assurance.
Our Awards
We have won the top industry awards for our work (BIMA GOLD, iF Design Gold Awards, GOV.UK Top 75 Service), and we are proud of our achievements.
One experienced team
Work with senior product, design, engineering, QA and DevOps specialists who can integrate with your team or take responsibility for delivery.
Practical AI adoption
We identify where AI can create measurable value, test the idea quickly and integrate successful solutions into secure, maintainable production systems.
150+ applications delivered
We have built or maintained over 150 applications, from focused prototypes to complex enterprise systems.
Client Success Stories
Case studies
We've been helping organisations to achieve their goals since 2009. Here are some of our latest and greatest projects.
View all case studies
Easol
Staff augmentation to extend the development team for an events e-commerce platform
Worked alongside the EASOL development team to improve performance, develop new features and upgrade their Ruby on Rails application. For some customers, their site loaded in half the time.
Business and Financial ServicesE-commerce
Serious Readers
Supporting, maintaining and improving a bespoke Ruby on Rails e-commerce website.
We took over support and maintenance of a bespoke Ruby on Rails e-commerce site for Serious Readers, improving the stability and performance of the site.
E-commerceB2C (Business to Consumer)
Talking Tables
Rewriting custom Shopify app to enable seamless syncing with an Enterprise Resource Planning (ERP) software
We created and maintained a bespoke Shopify application to sync customer and order data between their e-commerce platform and Enterprise Resource Planning (ERP) software.
E-commerceB2C (Business to Consumer)
GOV.UK Trade Tariff
Making GOV.UK Trade Tariff (import/export tool) 3x faster and 10x cheaper to maintain
We rebuilt the complex tool to help users find the information they need easily. We continue to support it, and it now serves more than two million page views a month while meeting government digital standards.
Government and Charities
King's Awards for Enterprise
Streamlining the application process for the UK's most prestigious business awards
Through in-depth research, we rebuilt the service. The improvements met stringent government standards and made it easier for thousands of organisations to apply for the awards.
Government and CharitiesBusiness and Financial ServicesSXT
Reducing the spread of STIs, with a patient-friendly digital partner notification tool
Working closely with doctors and other health professionals, we developed a new digital service for SXT. The platform lets patients discreetly notify their partners about a potential infection, and helps clinics to meet their KPIs.
Health and Wellness
We deliver tangible results for our clients
237%
improvement in a clinic partner-notification KPI within four months
3x / 10x
faster to use and cheaper to maintain the GOV.UK Trade Tariff
3,500+
Certificate of Sponsorship numbers issued in under two months without increasing headcount
2x
faster page loads for some Easol customers, whose sites loaded in half the time
Our awards
How we can help
Complex software and practical AI services
Build something new, modernise or support an existing system, apply AI to a defined problem, or add experienced specialists to your team.
Tech stacks
Technologies we support
We specialise in modern open source technologies that power web and mobile applications. Each of our developers, on average, has ten years of experience in our core technology stack. Our expertise is focused on, but not limited to:
Ruby on Rails
React Native
ReactJS
Node.js
Vue.js
Shopify Hydrogen
Python & Django
PostgreSQL
MySQL
Elixir & Phoenix
MongoDB
Elasticsearch
"Bit Zesty has smart people who get up to speed very quickly. They have really listened effectively to what we do and brought forward exciting and innovative proposals for our online service. They have helped me and my team think of things in a different way. An impressive, professional team who are really easy to work with."
Linda Stephens
The Secretary to the King's Awards for Enterprise
Media Coverage
Our clients' applications have been featured in major media outlets.
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Do you need help with your application?
At Bit Zesty, we specialise in building and maintaining bespoke software and integrating AI into existing applications.
Looking to build an application, but unsure of the price? Keen to discuss our experience, processes and availability?