Hire the Best Java Developers
in the United Kingdom

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Rating is 4.8 out of 5.
4.8/5
Based on 331 client reviews
Mauro M.

London, United Kingdom

$30/hr
5.0
4 jobs

Organised, Trustworthy and Passionate Software Engineer with almost 20 years experience building highly scalable Web Applications. Grown from Junior Developer to Team Leader as permanent employee within big and small Organisations, I faced all the steps of the SDLC and the challenges of working cross teams, startup environments, obsolete code, customer technical support, hardware replacement, solo developer, release manager. Below a list of skills and services I provide: - Microservices - Old school Monolithic web apps - Troubleshooting and bug fixing - Infrastructure Design and Setup from basic to highly scalable systems - Requirements gathering and Kanban Board management - Team and Project management using Agile methodologies - Coding at night to reach the deadline I'm very looking forward to helping your business grow while I take care of the tech behind it. Your success is my success, get in touch!

  • Java
  • Software Architecture & Design
  • Spring Boot
  • Web Development
  • Web Application
  • Software Development
  • SQL
  • Portlets
  • Java Servlet API
  • REST API
  • Spring MVC
  • MySQL
  • PHP
  • Laravel
  • JavaScript
Pranay T.

East Grinstead, United Kingdom

$60/hr
5.0
19 jobs

I am a Senior Software Engineer with over 12 years of experience specializing in high-scale, resilient systems. My career is defined by taking full ownership of complex technical challenges, from designing high-concurrency backend services to architecting modern, modular frontends. I have a proven track record of delivering value in both high-growth startups and large-scale multinationals like Cisco, Skyscanner, and Kindred Group. Technical Focus - Backend & Systems: Expert in the Java ecosystem (Spring Boot, Reactive Spring, Hibernate, Security). I also specialize in building high-concurrency services using Go (Golang) for real-time event processing and Node.js for secure API layers. - Frontend Architecture: Core expertise in React, Redux, and Next.js using TypeScript. I focus on Micro Frontend architectures to create reusable, modular components that improve performance across large applications. - Infrastructure & DevOps: Deeply experienced in AWS (EKS, Lambda, S3, RDS). I manage container orchestration via Kubernetes and ArgoCD, and I design robust CI/CD pipelines using GitHub Actions and AWS CodePipeline. - Data & AI: Experienced with PostgreSQL, MySQL, and DynamoDB (utilizing Global Tables for cross-region replication). I have hands-on experience integrating Generative AI/LLMs into production backend workflows via gRPC and REST. Key Professional Impact - Payments Specialist: Managed end-to-end payment lifecycles using Stripe Connect, implementing secure subscriptions and 3DS authentication to mitigate fraud and ensure seamless user experiences. - At Cisco ThousandEyes: Developed high-scale backend systems utilizing Java, Spring Boot, and Kafka to handle massive data streams. - At Skyscanner: Integrated Generative AI for traveler search, managed EKS cluster migrations, and built a secure, cross-region Payment Gateway platform using Java, Dropwizard, and DynamoDB. - At Kindred Group: Designed a Micro Frontend architecture that unified style components across multiple applications, significantly improving loading performance. - Specialized Projects: Built an asynchronous IoT testing service in Go handling millions of WebSocket events and managed complex payment lifecycles using Stripe Connect. I prioritize building for long-term maintainability and performance. If you need an engineer who can bridge the gap between complex backend logic, scalable infrastructure, and a seamless frontend experience, let’s talk.

  • Java
  • Spring Boot
  • Spring Framework
  • Redux
  • ExpressJS
  • React
  • Node.js
  • JavaScript
  • MongoDB
  • HTML5
  • Front-End Development
  • MySQL
  • Stripe
  • Web Design
  • Back-End Development
Atul G.

London, United Kingdom

$50/hr
5.0
4 jobs

PROFILE I'm a full-stack developer with 4+ years' experience delivering clean, maintainable code in fast-paced teams. I've worked across React, Node.js, Next.js, and TypeScript, building reliable and production-ready features. I run a coding tutorials youtube channel, I frequently present at client stake holder meetings, and have impeccable communication skills.

  • Java
  • Web Development
  • Node.js
  • React
  • TypeScript
  • JavaScript
  • Git
  • Contentful
  • Netlify
  • Deployment Automation
  • System Deployment
  • CI/CD
  • Docker
  • Web Application
  • Product Development
Muhammad Ahsan M.

Sheffield, United Kingdom

$14/hr
5.0
4 jobs

Hi, I’m Muhammad Ahsan, a Senior Android Mobile Application Developer with 5+ years of hands-on experience building secure, high-performance native Android applications, with a strong focus on banking, financial, and enterprise-level mobile solutions. I have worked on production-grade mobile banking apps used by real customers, including projects for UBL Digital, JS Bank, Allied Bank AMC, Alfalah AMC, and other financial institutions. My work involves security-focused development, performance optimization, and building scalable Android apps that meet strict compliance and reliability standards. 🔹 What I Specialize In Native Android App Development (Java & Kotlin) Banking & FinTech mobile applications Secure authentication & financial workflows RESTful API integration Firebase Realtime Database MVVM architecture Performance optimization & bug fixing Maintaining and upgrading live apps on Play Store 🔹 Professional Experience I am currently working as a Senior Mobile Developer at Veripark, where I: Develop and customize mobile banking applications for different financial clients Maintain and enhance existing Android apps available on app stores Build reusable components to reduce development time Troubleshoot complex issues in live production apps Collaborate remotely with international teams while meeting strict deadlines Previously, I worked as a Software Engineer at M3 Technologies, where I: Developed native Android applications using Java Participated in requirements gathering and technical analysis Supported change management and controlled releases Managed client expectations and delivery timelines 🔹 How I Work Clear and professional communication Strong attention to detail Focus on clean, maintainable code Responsible with timelines and commitments Comfortable working independently or with distributed teams I understand that financial and enterprise apps require stability, security, and accuracy, and I take full ownership of the quality of my work.

  • Java
  • ARCore
  • Kotlin
  • Web Service
  • RESTful API
  • Firebase Realtime Database
  • Android App Development
  • Model View ViewModel
  • FinTech Consulting
  • JSON
Muhammad Haroon Saeed C.

London, United Kingdom

$3/hr
4.9
23 jobs

With 14+ years of software engineering experience, I design and build Salesforce and e-commerce systems that help businesses automate operations, improve revenue processes, and scale efficiently. I specialize in connecting Salesforce with modern AI capabilities and e-commerce platforms like Shopify to create fully integrated, automated business systems. My focus is not just development, but delivering end-to-end solutions that remove manual work and improve business performance. I work with companies that need scalable CRM architecture, intelligent automation, and seamless integration across sales, service, marketing, and commerce systems. --- What I Build **Salesforce Solutions** • Sales Cloud & Service Cloud automation • Commerce Cloud (B2C / B2B) implementations • Revenue Cloud (CPQ & Billing) • Custom Apex, Lightning Web Components (LWC), and enterprise workflows • End-to-end CRM architecture and optimization **AI Automation & Agentic Systems** • AI-powered CRM assistants and copilots • Autonomous AI agents for sales and support workflows • Retrieval-Augmented Generation (RAG) systems for enterprise knowledge • Multi-step AI workflow orchestration across business tools **E-commerce & Integration Systems** • Shopify integrations with Salesforce • Multi-system CRM and e-commerce synchronization • API integrations with ERP, WMS, and third-party platforms • White-label dashboards and internal operational tools --- Technical Expertise Salesforce (Sales Cloud, Service Cloud, Commerce Cloud, Marketing Cloud, Data Cloud, CPQ), Apex, LWC, MuleSoft, REST/SOAP APIs, Node.js, React, Python, OpenAI, vector databases, AWS, Docker, and cloud-native architecture. --- Why Clients Work With Me • 14+ years of enterprise software engineering experience • Strong focus on business outcomes and automation ROI • Experience building scalable, production-grade architectures • End-to-end delivery from system design to deployment --- If you're looking to connect Salesforce, AI, and e-commerce into one automated and scalable system, I can help design and implement it end to end. Salesforce Developer, Salesforce Commerce Cloud, SFCC, Headless Ecommerce, Salesforce Sales Cloud, Salesforce Service Cloud, Salesforce Marketing Cloud, Salesforce CPQ, Data Cloud, MuleSoft, Apex Developer, LWC Developer, AI Automation, AI Engineer, AI Developer, OpenAI, GPT-4, Claude AI, Gemini AI, LLM, RAG, Retrieval Augmented Generation, AI Agents, AI Chatbot, Conversational AI, Machine Learning, Generative AI, Prompt Engineering, LangChain, CrewAI, Semantic Search, Vector Database, Pinecone, FAISS, Qdrant, AI SaaS, SaaS Development, Claude Agent, AI Agent Development, Autonomous AI Agents, Multi-Agent GoHighLevel, GHL, Funnel Automation, Sales Funnels, High-level Automation, CRM Integration, Zapier, Make, n8n, Workflow Orchestration, Database Design, PostgreSQL, MySQL, MongoDB, Node.js, React.js, Next.js, Python, TypeScript, JavaScript, SaaS Automation, White Label Solutions, Enterprise AI

  • Ecommerce Website Development
  • Salesforce
  • Mobile App
  • Web Application
  • API Development
  • Python
  • LangChain
  • Vector Embedding
  • AI Chatbot
  • OpenAI API
  • Supabase
  • React
  • n8n
  • SaaS Development
  • Generative AI
Liam W.

London, United Kingdom

$450/hr
5.0
17 jobs

🚀 15+ Years Experience | 10x Engineer | Trusted by Fortune 500 Companies | Expert in Microservices & API Integration Projects 🏆 Delivered 20+ enterprise Java and SDLC projects with a typical 20% to 50% improvement in DORA metrics (deployment frequency, lead time, MTTR, change failure rate) ⭐️ I am a highly skilled Java Developer and DevOps Engineer with 15+ years experience in Back-End Development, specializing in Microservice Architectures and bespoke API Integration. I build robust, scalable production or MVP solutions and lead complex projects with a focus on clean code and solution quality. 🛠️ What I Offer 💼 Value Delivery - I blend technical expertise with business insights to deliver real value fast. 🚀 Startup MVP Development - From idea to viable products in fast-paced environments. 🔄 Spring Boot Microservices - Crafting modular services that scale effortlessly. 🏗️ Monolith-to-Microservices - From legacy application to cloud-ready architecture, with up to 85% improved resource utilization and 60% faster feature time-to-market. 🔧 Enterprise Modernization - Revitalizing outdated systems with cutting-edge technology. ⚡ Core Expertise ✅ TDD/BDD/ATDD - Test-Driven Development is at the core of how I work with clients. ☁️ Microservices & Cloud - Resilient systems using Docker, Kubernetes, AWS, GCP & Azure. 🔄 CI/CD Pipelines - Reliable deployments using e.g. Jenkins, GitLab CI and GitHub Actions. 🔌 REST API Development & Integration - Building secure, high-performance web services. 🔗 Third-Party API Integration - Payment gateways, social media, maps, AI agents and more. 📊 Agile Development - Transparent, adaptive planning and iterative requirement discovery. ⚙️ Software Automation Solutions - Specialist tools and techniques to streamline the SDLC. 🤝 Why Work With Me? I consistently deliver projects on time and within scope, from lean startup apps to large enterprise systems. My collaborative approach ensures solutions align with your business goals and user needs. Having worked as a hands-on developer, software architect, team lead, and startup co-founder, I effectively bridge technical and business discussions while staying current with the latest technologies. 🌟 My Goal To build long-term partnerships by delivering quality results with professional service. If you need a dedicated Back-End Development partner to architect Microservices, integrate complex APIs, or streamline your DevOps pipeline, let's discuss how I can contribute to your project's success! 📈 💰 Investment Levels - Emergency Advisory: $450/hour (minimum 1 hour) - Architecture Review & Value Stream Mapping: $10,000-15,000 fixed price - Digital Transformation Projects: Custom pricing starting at $25,000 📅 Currently booking for Q2 2026 If you're facing scaling challenges or need senior technical guidance, let's discuss how I can accelerate your path to success.

  • Java
  • Spring Boot
  • Agile Software Development
  • API Development
  • Kubernetes
  • DevOps
  • API Integration
  • Clean Architecture
  • Domain-Driven Design
  • API Framework
  • REST API
  • Back-End Development
  • Minimum Viable Product
  • Automation
  • AI Consulting

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