Hire the Best API Integration Freelancers
in the United Kingdom

Most of my work starts when a business has outgrown spreadsheets, fragile automations, and disconnected tools and needs reliable systems that hold up under real daily usage. I specialise in business process automation, API integration, and internal system development, connecting CRMs, databases, automation platforms, and third-party tools with clean logic and predictable behaviour. No constant fixes. No surprise failures when volume increases. I work end to end from mapping the operational problem to designing the workflow, building the automation, testing edge cases, and staying available after delivery. Full ownership throughout, not just at handoff. My work covers workflow automation, CRM integration, data pipeline development, internal tooling, and AI-powered process automation used as part of the system, not dropped in as a feature. I run an agency setup handling both one-off system builds and ongoing retainer-based engagements. I work best with founders, operations managers, and growing teams who need dependable backend systems instead of constant firefighting. If your internal workflows are unpredictable, fragile, or just taking up too much of your team's time that's exactly the kind of problem I work on. Happy to talk through what you're working on.

Is your CRM, ERP, or eCommerce platform losing data every time it syncs? I integrate the systems your business runs on Stripe, HubSpot, Shopify, QuickBooks, Salesforce, and POS platforms so they exchange data reliably under real transaction volume. Most of what breaks isn't bad theory. It's a pipeline nobody wants to touch, or a "connected" system quietly dropping records with no logging or retries to catch it. What I've built: Stripe-to-ERP billing sync with automated reconciliation Event-driven Shopify → HubSpot order and customer sync Multi-terminal POS reconciliation feeding a forecasting engine If that's not your problem, I'm probably not the right fit no hard feelings. If it is: tell me what's breaking, or invite me to your job post, and I'll send back a short Loom on exactly how I'd approach it. No call, no coding test, no pitch theater. If it turns out you need less work than you think, I'll tell you that too.

I'm a highly skilled Web App Developer with 5+ years of experience building efficient, scalable, and dynamic web applications. My expertise lies in crafting robust web solutions that deliver seamless user experiences while meeting project goals. What Sets Me Apart: Technical Expertise Customer Service Languages & Frameworks: PHP, Python, JavaScript, Node.js, React.js Database Management: MySQL, MongoDB, PostgreSQL Skilled in designing optimized databases and implementing complex queries for efficient data handling. API Integration Third-Party APIs: Extensive experience with Stripe, PayPal, AWS, Google Cloud, and more. Ensure smooth data flow and enhanced functionality through seamless API integration. CRM Integration Expertise in Shipstation, HubSpot, Zapier, Zoho CRM Automate workflows and improve customer engagement through streamlined CRM integration. Security

🏆 𝗧𝗼𝗽-𝗿𝗮𝘁𝗲𝗱 𝗽𝗹𝘂𝘀 𝗲𝘅𝗽𝗲𝗿𝘁 𝘄𝗶𝘁𝗵 𝟭𝟬𝟬% 𝗝𝗦𝗦 🎖𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗶𝘁𝗵 𝗼𝘃𝗲𝗿 𝟭𝟯 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 🔗 API Development: Google Ads API, Google Analytics API, Facebook API, Bing Ads API, LinkedIn API, Yahoo Gemini API, Twitter API, Apple Search Ads API, OpenAI and AI Design and API Integration, WhatsApp API with Gallabox, WhatsApp Automation with Gallabox 💻 PHP Laravel SaaS Projects developed in PHP/Laravel/MySQL 🛠️ AWS Certified Solutions Architect 🌍 Managed global teams and executed projects with precision, developing resilient and scalable applications 🌟 Led tech teams on UK National Lottery, GVMS, HMRC, and Universal Credit projects, contributing to successful government initiatives 💼 Previous clients include: Verizon, Pfizer, BT 𝗠𝘆 𝘀𝘁𝗮𝗰𝗸 𝗹𝗶𝘀𝘁 𝗶𝗻𝗰𝗹𝘂𝗱𝗲𝘀 🛠️ ✔PHP Development ✔Laravel Framework ✔MySQL/PostgreSQL/MongoDB/Airtable ✔API Development and Integration ✔ Custom API development using PHP and Laravel. ✔WordPress ✔SaaS Products ( C2C, B2B, App Design, Prototypes, MVP) ✔Amazon Web Services (AWS) ✔Cloud ✔Google Cloud Platform (GCP) ✔Docker ✔ OpenAI and AI Design and API Integration 𝗔𝗣𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆: ➡️Adwords (Google Ads), Bing Ads ➡️Amazon Ads and Facebook Ads. (REST) ➡️ Twilio ➡️CRMs like Zoho, SugarCRM ➡️Payments like PayPal, stripe, Braintree ➡️ Invoicing -Xero, QuickBooks. ➡️ Amazon MWS (SP API) ➡️ OpenAI/ AI API ➡️ WhatsApp API with Gallabox Press the 🟢 "Invite" 🟢 button on my profile and let's communicate. I am easy and simple to speak with. ⚡ I've finished dozens of projects in Digital Marketing Software. Specialized in Google Ads, Amazon Ads, and Meta Ads. Automated reporting, bid management, and budget optimization. Also, PHP Laravel SaaS Projects developed in PHP/Laravel/MySQL with several pricing tiers and user types. Integrations with Google Ads API, Google Analytics, Google Business and all deployed as docker containers in Google Cloud/AWS. ⏰ 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆: 𝗖𝗼𝗻𝘁𝗿𝗮𝗰𝘁-𝗯𝗮𝘀𝗲𝗱 | 𝗙𝘂𝗹𝗹-𝘁𝗶𝗺𝗲 | 𝗣𝗮𝗿𝘁-𝘁𝗶𝗺𝗲 I respond fast, work well on my own, and love teamwork. I aim for top-notch results and want a lasting partnership. Feel free to reach out anytime 💬 𝗛𝗮𝘃𝗲 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 𝗼𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗻𝗲𝗲𝗱𝘀? 𝗜'𝗺 𝗵𝗲𝗿𝗲 𝘁𝗼 𝗵𝗲𝗹𝗽. 𝗥𝗲𝗮𝗰𝗵 𝗼𝘂𝘁 𝗳𝗼𝗿 𝗮 𝗳𝗿𝗲𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝘁𝗼 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁.

I run Optimisare Ltd, a UK-based software engineering company that builds reliable, scalable digital systems. My earlier Upwork activity was in a different field; today, my work is fully focused on software delivery through Optimisare Ltd. How we work: We start with a free consultation for any client - new or returning - to identify the best way to implement your project and maximise automation or efficiency. We don’t simply take requirements as given; if needed, we work with you at no cost until the technical approach is clear and you’re ready to proceed. I act as your primary point of contact, managing communication, requirements, planning and delivery, while our engineering team handles implementation and architecture. We turn ideas and specifications into production-ready software with a clean structure and maintainable code. What we build: • Web applications, admin panels, dashboards, portals • Backend systems, REST/GraphQL APIs, microservices • SaaS platforms with roles, permissions, billing and subscriptions • Integrations with CRMs, ERPs, payment systems and third-party APIs • Automation tools, data processing pipelines, bots and background services • Mobile apps (iOS, Android, cross platform) • Desktop applications for Windows, macOS and Linux • System modernisation, refactoring and architecture design Technologies we use: We select the right stack for each project, including: C#/.NET, Java, Python, JavaScript/TypeScript, Go, PHP, Kotlin, Swift React, Angular, Vue ASP.NET, Node.js, Spring, Django/FastAPI PostgreSQL, MySQL, SQL Server, MongoDB, Redis Containers, CI/CD, automated testing, cloud deployment. Project scale - from small utilities to full enterprise platforms: • automation scripts, chatbots, connectors • web apps with databases and admin panels • APIs, microservices, mobile apps • dashboards, reporting systems, user portals • e-commerce, booking, logistics and workflow systems • multi-module SaaS platforms and corporate systems

I am a full-time Elance software developer with 30 years experience. In that time I have developed hundreds of individual solutions each with their own specific requirements and problems. I am still here after 30 years because I get things done. I am not moonlighting. This is my fulltime job. You will get my full attention. I specialise in developing and using APIs and building custom tools that move data between them. I have worked on many of the popular APIs including merchantos,selleractive,fitbit,workflowmax,box,hermes,capsule,google,afflow,infusionsoft,cratejoy,chartmogul,pipedrive,salesforce,zillow,airtable,crunchbase,connectwise,freshdesk,pensionpro,handshake,dnagenotek,zoho,1ticket,skybox,mailchimp,hubspot,pipelinedeals,belimo,xero,zapier,hubplanner, channel advisor, taxjar and many others