# 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. - [HubSpot Development](https://celestify.com/hubspot-development): Custom HubSpot themes, reusable modules, HubL development, HubDB and complete website builds for marketing teams, HubSpot partners and agencies. ## Products - [Products overview](https://celestify.com/products): Full catalogue of Celestify's commercial software products. - [DNN Magic Link Authentication](https://celestify.com/products/dnn-magic-link-authentication): Say goodbye to the days of forgotten passwords, risky password management, and tedious security questions. Introducing the DNN Magic Link Authentication Provider. - [DNN Magic Link Authentication — documentation](https://celestify.com/products/dnn-magic-link-authentication/docs): Installation, configuration and usage documentation. - [Revolut Pay for Ecwid](https://celestify.com/products/revolut-pay-for-ecwid-lightspeed): Revolut Pay for Ecwid allows you to accept payments via Revolut in your Ecwid by Lightspeed storefront. In order to use this payment gateway you need a Revolut Merchant account. - [Revolut Pay for Ecwid — documentation](https://celestify.com/products/revolut-pay-for-ecwid-lightspeed/docs): Installation, configuration and usage documentation. - [Revolut Gateway for WHMCS](https://celestify.com/products/revolut-gateway-for-whmcs): Revolut Gateway for WHMCS allows you to accept credit card payments via Revolut in WHMCS. In order to use this payment gateway you need a Revolut Merchant account. - [Revolut Gateway for WHMCS — documentation](https://celestify.com/products/revolut-gateway-for-whmcs/docs): Installation, configuration and usage documentation. ## Case studies (proof) - [Case studies overview](https://celestify.com/customer-stories): Real client engagements and the outcomes Celestify delivered. - [A social app for discovering events, booking tickets, and finding your crowd](https://celestify.com/customer-stories/social-event-discovery-app): A social app that helps people find local events, meet others with the same interests, and book tickets fast, with smart suggestions built in. - [Web development that powers marketing: more traffic, more leads](https://celestify.com/customer-stories/perry-weather-web-development-for-marketing): We built lead magnets, geo‑targeted content blocks, and reusable CMS components so marketing could ship fast while engineering focused on core product. Built for speed, easy editing, and growing traf… - [Revolut Pay for Lightspeed (Ecwid) stores](https://celestify.com/customer-stories/revolut-pay-for-lightspeed-ecwid-stores): Simple Revolut Pay and card payments for Lightspeed (Ecwid) stores. - [All-in-one SaaS platform for measuring and managing social sustainability](https://celestify.com/customer-stories/social-sustainability-platform): Comprehensive platform powered by AI agents that helps financial institutions track, measure, and rebalance their asset portfolios towards better ESG scores - [AI powered import for handwritten attendance sheets](https://celestify.com/customer-stories/ai-powered-import-for-handwritten-attendance-sheets): AI + OCR feature that turns handwritten audit meeting sign‑in sheets into clean, verified digital attendance in Web QMS within minutes. ## Company - [Celestify](https://celestify.com): Homepage. - [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): We're looking for a Full Stack TypeScript Developer who can own end-to-end features, architect scalable solutions, and drive quality across our products and client projects. - [React C# .NET Developer](https://celestify.com/jobs/react-csharp-dotnet-developer): We're seeking a React C# .NET Developer to join our team and help build robust, scalable applications using modern web technologies. - [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. - [The AI models are the easy part](https://celestify.com/blog/the-ai-models-are-the-easy-part): AI is already changing how products get built. The opportunity is real, and so is the work behind it: good engineers are what turn AI into systems that perform, scale, and make commercial sense. - [ Is it worth building? The question that replaced "Can we build it?"](https://celestify.com/blog/is-it-worth-building-the-question-that-replaced-can-we-build-it): AI has made shipping software nearly free, so teams ship more than ever. The problem is that more features rarely mean more value, they mean more maintenance, more complexity, and more to support. Th… - [A year ago, agencies sold coding](https://celestify.com/blog/a-year-go-agencies-sold-coding): Today, everyone can code. AI has made building software ridiculously accessible, but that's also created a new set of problems. - [The next generation of SaaS will be invoked](https://celestify.com/blog/the-next-generation-of-saas-will-be-invoked): AI assistants are changing how users interact with SaaS. This article explains what that shift means for product design, integrations, permissions, and distribution. - [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): While IT is often seen as a 'weightless' industry, its pulse is surprisingly tied to the global energy market. In this post, we dive into personal research on how oil price volatility silently dictat… - [Fast Code, Bad Decisions: The New Software Crisis](https://celestify.com/blog/fast-code-bad-decisions-the-new-software-crisis): AI tools have made writing code the easy part. The hard part is knowing what to build, in what order, and why. Planning is now the skill that separates fast teams from teams that just build fast. - [Why "Everything in One Place" is Winning in 2026](https://celestify.com/blog/why-everything-in-one-place-is-winning-in-2026): The architecture is the bug. In 2026, the 'Distributed Monolith' has become a cautionary tale of over-engineering. We explore why the industry is shifting back to the 'Rule of One', and how consolida… - [Top 10 Software Buzzwords of 2025, Decoded](https://celestify.com/blog/top-10-software-buzzwords-of-2025-decoded): From vibe coding to AI agents and RAG, these are the 10 software buzzwords that defined 2025, explained simply for teams building real products with AI. - [3 Awesome SaaS Apps and their Open Source Alternatives to Grow your Business](https://celestify.com/blog/3-awesome-saas-apps-and-their-open-source-alternatives-to-grow-your-business): We explore open source alternatives to Zapier, Airtable, and Calendly, and how switching can give you more control, better value, and a stronger foundation for growth. - [Introducing Fractional CTO as a Service: The Key to Unlocking Your Business Potential](https://celestify.com/blog/introducing-fractional-cto-as-a-service): As a business owner, you're undoubtedly familiar with the many roles you play to keep your company thriving. Your responsibilities can often overshadow your ability to maintain a strategic focus on y… - [7 Tips to Protect your DNN Website from Ransomware](https://celestify.com/blog/7-tips-to-protect-your-dnn-website-from-ransomware): Ransomware has been a critical security issue since 2018 and is constantly evolving, making it increasingly difficult to detect as malware. We have taken this opportunity to share our experience and… - [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): Are you evaluating a CMS to use for a new website in 2020? Here are 8 reasons why DNN Platform is a perfect choice. ## 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. - [Blog RSS feed](https://celestify.com/blog/feed.xml): Machine-readable feed of new blog posts. - [Full text of every blog post](https://celestify.com/llms-full.txt): Single-file plain-text export of all published articles.