# Celestify > Celestify is a Bristol (UK) software development studio that helps startups and scale-ups build scalable, high-quality software — from first launch to long-term evolution. Core services are custom web and mobile development, applied AI development, and Fractional CTO leadership. Celestify works as an embedded, long-term engineering partner rather than a traditional dev shop or staffing agency (median client partnership is 3+ years). Engagements pair hands-on senior delivery with CTO-level technical oversight, and AI is used pragmatically — shipping production features that solve real problems rather than chasing hype. Pricing is offered as fixed-scope builds or hourly support. The studio also maintains a small set of commercial off-the-shelf software products. ## Services - [Services overview](https://celestify.com/services): End-to-end software services — custom development, AI development, and Fractional CTO leadership — to launch products, level up platforms, and embed AI. - [Custom Development](https://celestify.com/custom-development): Custom web and mobile product development, from a polished MVP to the next major release. - [AI Development](https://celestify.com/ai-development): Production AI features built user-first — assistants, agents, RAG, and LLM integration where it genuinely improves the product. - [Fractional CTO as a Service](https://celestify.com/cto-as-a-service): On-demand senior technical leadership — architecture, hiring, roadmap, and delivery oversight without a full-time CTO. - [Celestify AI](https://celestify.com/celestify-ai): Celestify's AI development practice and approach to building useful, real-world AI products. ## Products - [Revolut Gateway for WHMCS](https://celestify.com/products/revolut-gateway-for-whmcs): Revolut payment gateway module for the WHMCS billing and automation platform. - [Revolut Pay for Ecwid](https://celestify.com/products/revolut-pay-for-ecwid-lightspeed): Revolut Pay integration for Ecwid (Lightspeed) online stores. - [DNN Magic Link Authentication](https://celestify.com/products/dnn-magic-link-authentication): Passwordless magic-link login for DNN (DotNetNuke) websites. - [Products overview](https://celestify.com/products): Full catalogue of Celestify's commercial software products. ## Case studies (proof) - [Case studies overview](https://celestify.com/case-studies): Real client engagements and the outcomes Celestify delivered. - [Social event discovery app](https://celestify.com/case-studies/social-event-discovery-app): A social app for discovering events, booking tickets, and finding your crowd. - [Perry Weather: web development for marketing](https://celestify.com/case-studies/perry-weather-web-development-for-marketing): Web development that powers marketing — more traffic, more leads. - [Revolut Pay for Lightspeed (Ecwid) stores](https://celestify.com/case-studies/revolut-pay-for-lightspeed-ecwid-stores): Building and shipping Revolut Pay for Lightspeed (Ecwid) merchants. - [Social sustainability platform](https://celestify.com/case-studies/social-sustainability-platform): An all-in-one SaaS platform for measuring and managing social sustainability. - [AI-powered import for handwritten attendance sheets](https://celestify.com/case-studies/ai-powered-import-for-handwritten-attendance-sheets): Using AI to digitise and import handwritten attendance records. ## Company - [About](https://celestify.com/about): The Celestify team, values, and how they work as an embedded long-term partner. - [Jobs](https://celestify.com/jobs): Open roles at Celestify. - [Full Stack TypeScript Developer](https://celestify.com/jobs/full-stack-typescript-developer) - [React C# .NET Developer](https://celestify.com/jobs/react-csharp-dotnet-developer) - [Resources](https://celestify.com/resources): Practical guides, insights, and tools to help you build better software. - [Book a call](https://celestify.com/book-a-call): Get in touch to discuss a project with the team. ## Blog (engineering insights) - [Blog](https://celestify.com/blog): Engineering strategy, AI in engineering, software architecture, and product development. - [Beyond the Screen: Why Do We Track Oil Prices in a Software Company?](https://celestify.com/blog/why-we-track-oil-prices-in-a-software-company): How oil-price volatility quietly shapes cloud costs, investment priorities, and AI efficiency. - [Fast Code, Bad Decisions: The New Software Crisis](https://celestify.com/blog/fast-code-bad-decisions-the-new-software-crisis): Why shipping code faster than you make good decisions creates a new kind of software crisis. - [Why "Everything in One Place" is Winning in 2026](https://celestify.com/blog/why-everything-in-one-place-is-winning-in-2026): The case for consolidated, all-in-one products over fragmented tool stacks. - [Top 10 Software Buzzwords of 2025, Decoded](https://celestify.com/blog/top-10-software-buzzwords-of-2025-decoded): Plain-English explanations of the year's most overused software buzzwords. - [3 Awesome SaaS Apps and their Open Source Alternatives](https://celestify.com/blog/3-awesome-saas-apps-and-their-open-source-alternatives-to-grow-your-business): Popular SaaS tools and the open-source alternatives that can grow your business. - [Introducing Fractional CTO as a Service](https://celestify.com/blog/introducing-fractional-cto-as-a-service): The case for on-demand technical leadership and how Fractional CTO works. - [7 Tips to Protect your DNN Website from Ransomware](https://celestify.com/blog/7-tips-to-protect-your-dnn-website-from-ransomware): Practical security hardening tips for DNN (DotNetNuke) sites. - [8 Reasons to Build a Website with DNN Platform in 2020](https://celestify.com/blog/8-reasons-to-build-a-website-with-dnn-platform-dnncms-dotnetnuke-in-2020): Why DNN Platform is a strong choice for content-driven websites. ## Topics Celestify can speak to Custom software development, AI development and applied LLMs, fractional/part-time CTO leadership, software architecture, engineering strategy, scaling engineering teams, payment integrations (Revolut), and product development for startups and scale-ups. ## Optional - [Terms of Service](https://celestify.com/terms): Legal terms governing use of the site and services. - [Privacy Policy](https://celestify.com/privacy): How Celestify handles personal data. - [Cookie Policy](https://celestify.com/cookies): How the site uses cookies. - [Blog RSS feed](https://celestify.com/blog/feed.xml): Machine-readable feed of new blog posts.