Hire the Best Apache OFBiz Developers
in India

❇️ Top 1% Upwork Talent | 🏆 Top Rated Plus | ✔️ 100% Job Success | ☀️ Available Immediately With 16+ years of experience, I operate at the intersection of AI-driven architecture, enterprise software engineering, and large-scale system design—helping organizations build, modernize, and scale mission-critical platforms. I specialize in designing and delivering high-performance CRM & ERP ecosystems, with deep expertise in Zoho CRM, Odoo, OFBiz, and Moqui, tailored for complex business environments. 🔷 Core Expertise ✔️ Enterprise Architecture & AI Integration Designing intelligent, scalable systems powered by modern AI-driven workflows and automation. ✔️ CRM & ERP Systems Leadership End-to-end implementation, customization, and optimization of enterprise platforms: Zoho CRM Odoo OFBiz / Moqui ✔️ Java & Microservices Excellence Java, Spring Framework, Microservices Architecture Struts2, JavaFX RESTful APIs & distributed systems ✔️ Full-Stack Engineering Frontend: HTML5, CSS3, JavaScript (ES6), ReactJS Mobile: React Native (cross-platform apps) ✔️ Database & Performance Engineering Oracle, PostgreSQL, MySQL, SQL Server Advanced Oracle PL/SQL for enterprise-grade systems 🔷 Delivery & Leadership Approach I bring a consultative, architect-level mindset to every engagement: 📌 Deep discovery & solution blueprinting upfront ⚡ Agile execution with fast iteration cycles 📊 Scalable, future-proof system design 💬 Clear, proactive communication throughout I am highly proficient with modern development workflows and tools including Git, JIRA, Redmine, Bugzilla, Basecamp, and Trello, ensuring seamless collaboration across distributed teams. 🔷 Availability 🕒 30–35 hours/week 🌍 Flexible across time zones 🤝 Strong communication & stakeholder alignment If you’re looking for a trusted technology partner who can architect and deliver robust, intelligent, and scalable enterprise systems, I bring both the strategic vision and hands-on expertise to make it happen. — Harkomal Singh

I’m a highly skilled Senior Full-Stack Developer with 14+ years of experience designing, developing, and managing enterprise-level applications. My goal is to utilize my knowledge, skills, and abilities to improve software performance and deliver high-quality solutions that meet customer needs through collaboration with talented engineers. I strive to deliver quality software while ensuring better performance in development. I have extensive expertise in leading the architecture and development of enterprise applications. I use AI-powered tools and modern technologies to speed up development, improve code quality, and deliver faster results. By integrating AI into workflows, I help businesses reduce development time, boost performance, and launch products quickly. I am dedicated to delivering solutions that go beyond expectations, with a strong focus on performance, efficiency, and continuous improvement. 👉Core Technical Expertise ➡️ Backend Expertise I design and build high-scale, reliable, production-grade systems with full ownership of architecture, performance, and security. ✅ Core Technologies 🔹Node.js (NestJS), Java (Spring Boot, Hibernate), .NET Core 🔹Build low-latency, high-throughput systems with clean architecture ✅ Distributed Systems & Architecture 🔹Design microservices & monolithic systems for scalability 🔹Strong understanding of scalability, fault tolerance, and system design 🔹Experience with high-traffic and real-time systems ✅Security & Data Protection 🔹Implement JWT, OAuth2, RBAC 🔹Apply secure coding and encryption practices ✅Data & Performance 🔹PostgreSQL, MSSQL optimization 🔹ORM: Hibernate, LINQ, Prisma, TypeORM, Mongoose, Sequelize 🔹Focus on caching and performance tuning ✅ Engineering Excellence 🔹Clean architecture, SOLID principles 🔹Testing, debugging, code review, monitoring 🔹Scalable, maintainable code ✅Additional Experience 🔹Eclipse RCP desktop apps 🔹AI integration for automation and efficiency ➡️ Frontend & UI Development I build modern, responsive, high-performance applications with a strong UX focus. ✅Core Technologies React, Angular, Next.js, Vue.js ✅UI Architecture & Design 🔹Design component-based, scalable frontend systems 🔹Strong in responsive design, cross-browser compatibility, and accessibility 🔹Create intuitive UI aligned with business goals ✅UI Frameworks & Styling 🔹Quasar, Vuetify, Material UI 🔹Build clean, consistent, visually appealing UI ✅Performance Optimization Optimize for fast load times, SEO, and smooth interactions. Use lazy loading, code splitting, and efficient rendering ✅AI-Enhanced UI Development Use AI tools to speed up development and improve UI quality. Implement personalisation and data-driven improvements ✅Engineering Excellence Focus on clean code and reusable components. Experience in testing, debugging, and monitoring Build scalable, maintainable frontend solutions ➡️ Mobile Application Development 🔹Native: Java, Kotlin, Swift 🔹Cross-platform: React Native, Xamarin 🔹App Store & Play Store deployment ➡️ Databases & ORM MongoDB, MySQL, PostgreSQL, MSSQL, Oracle, Firebase, SQLite ➡️ API Design & Integrations Build RESTful APIs with clear contracts, versioning, and backward compatibility Integrate with external services, payment systems, and third-party APIs while ensuring resilience and observability Manage complex application states using modern state management libraries Integrate frontend applications with REST APIs and third-party services efficiently 👉Domain Expertise : Healthcare |E-commerce |E-Governance |E-learning |Social Networking |SaaS |PaaS |CRM |Lead Generation |Survey |Games |Accounting |IT Networks |Cloud Computing |E-Education |Retail |Advertisement |Hotel Management |Finance |Forex |Trading |Stock Exchange |Real Estate |Insurance |Payment Technology |Food Industry |Business Appointments 👉 Project Management & Tools 🔹 Agile Delivery Work in Agile/Scrum for smooth, flexible, on-time delivery with continuous improvement 🔹 Issue Tracking & Debugging Use Jira, Bugzilla, and Mantis to track, manage, and resolve issues with focus on code quality 🔹 Version Control & Collaboration Manage code using Git and SVN for secure, structured team collaboration 🔹 API Development & Testing Design, test, and manage APIs using Postman for reliability and performance 👉Why Choose Me? 🔹 End-to-End Ownership Handle frontend, backend, and database for a seamless process 🔹 Solution-Oriented Solve real business problems with scalable solutions 🔹 Reliable Delivery On-time delivery with production-ready quality 🔹 Clear Communication Timely updates and transparent communication 🔹 Successful Delivery Rate 100%+ delivery with high client satisfaction 🔹 Leadership & Collaboration Lead teams and collaborate for successful outcomes 👉Let’s Connect! Looking for a developer to bring your vision to life? Let’s collaborate and build something amazing. Message me, and I’ll respond quickly.

I’m a hands-on enterprise software professional with 14+ years of experience building scalable, process-driven solutions using leading AI, RAG, AI Agents, Agentic AI workflows implementation and collaboration, Vector DB, Graph DB, BPM platforms like Camunda 7 BPM, Camunda 8 BPM (Zeebe), Flowable BPM, Activiti BPM, and JBPM with Spring boot micro services and Python. I’ve helped clients design, automate, and optimize complex business processes for banking, insurance, government, and finance sectors. 💼 What I Do Best ✅ AI & LLM Integration | Intelligent Automation | RAG | Agentic Workflows | N8N (AI Autumation) | Airtable - AI-powered chatbot assistants using OpenAI GPT models, Claud and Ollama (Mistral, Llama), Claud with Python FastAPI, Claude and OpenAI Agents SDK. - Semantic search pipelines using vector db(FAISS and Qdrant), Graph DB(Neo4j), enabling Retrieval-Augmented Generation (RAG) for high-relevance contextual responses. Voice agent platform(RetellAI). - Built custom AI agents with tool usage and memory, orchestrated using LangChain /Langgraph / Agentic frameworks(CrewAI) for multi-step automation tasks and N8N AI workflow automation. - Seamlessly integrated AI assistants into Business Process Management (BPM) workflows (e.g., Camunda) to optimize decision making and automate repetitive user interactions. - Automated agentic workflows for tasks like retrieve incident status, details, cancellation requrest, get incident details via email, create incident, text summarization for form fields, document summarization, incident triage, ticket classification, and knowledge base augmentation. -Auto email responder using, email notifications, whatsapp notifications, SMS, telegram notifications using multi agents workflows. ✅ Business Process Automation - Camunda 7 / Camunda 8 (Zeebe) / Flowable / JBPM / Activiti BPM - Process modeling (BPMN), DMN, and custom workflow engines - Drools, Zen(GoRules) rule engine and complex decision automation ✅ Backend & Microservices Development - Java (Spring Boot, Spring Security, JPA, Hibernate) - Python (FastAPI) for high-performance APIs and AI integrations - RESTful API design, OAuth2, JWT, Keycloak-based security ✅ ETL Tools - Apache NiFi - Apache Airflow ✅ DevOps & Cloud Deployments - Docker, Kubernetes (EKS, ECS) - CI/CD with Jenkins, GitHub Actions - AWS (EC2, S3, Lambda, CloudWatch, API Gateway etc.) ✅ Integrations & Messaging - Apache Kafka (Confluent), RabbitMQ, Apache Camel - Elasticsearch, Apache Solr, Lucene for advanced search - Payment gateways: Stripe, Razorpay, PayPal, Moneris ✅ Frontend Capability (with expert UI/UX team) - Angular, ReactJS, NodeJS - PSD/XD to responsive HTML, Tailwind, Material UI 🎓 Corporate Trainings & Mentorship I offer professional training programs (remote/onsite) on: - Camunda 7 / Camunda 8 (Zeebe) - Flowable / Activiti / JBPM - Elasticsearch ✅ Why Clients Work With Me - Deep domain knowledge in AI + BPM + Microservices - Strong architecture, documentation & code quality - Proven track record delivering enterprise-grade systems - Ability to lead full project lifecycle — from POC to production 💬 Let’s connect and discuss how I can automate and optimize your business with smart workflows, secure APIs, and cloud-native systems.

I am a senior developer with 21 Yrs. of experience ( 12+ Yrs with JPMorgan and rest with Deloitte, HCL and other) in Java/J2ee, Python, Rest API, SOAP API, javascript, OAuth, SSO, Kafka, SpringBoot, HTML, CSS, PHP, Web Design, Web Development, React, Redux, Angular, e-commerce, Wordpress, Shopify, JPA, Cloud, AWS, Azure, GCP, Private cloud, JBPM, n8n, Oracle BPM, JMS, Hibernate, Struts, Spring Batch, ESB, Base44, Playwright, Selenium, JavaFX, Lisp, Prolog, Weka , OpenAI, Different Web as well as Application Servers, different Operating Systems and DBMS Tools, SQL, NoSQL, PostgreSQL, Mongo, Cassandra, MYSQL, Oracle, Supabase, AI, NLP, OpenAI, agent development, Wordpress, php , CI/CD, Agile and various open-source tools, technologies and frameworks. Some of the domains I have worked on are Banking, finance, Trade, Crypto, HR, Insurance, Learning, NLP, Healthcare, System architecture, Developers Tooling, Document management, AI, DevOps, Cloud, GCP, Hubspot, Quickbook, PandaDoc, Stripe, web3, Blockchain, etc. ********************************************************************* Experience Summary: Freelancing || Freelancing || Present Toyow || Solution Architect || Sep 24 to JAN 25 JPMorgan || Vice President || (Around 12 Yrs. Total) Deloitte || Senior Consultant/Specialist Senior || Jun 13 to Jun 15 HCL || Onsite/Offshore Dev lead || Sep 06 to May 10 Birla Soft Ltd || Software Engineer || Jan 06 to Sept 06 GIIT || Developer || Feb 05 to Oct 05 ************************************************************************* Some of the applications are as below: - Document generation system - Online translation system using NLP - Library management system - HRMS System - Networking system - Tools for Developer and Operate to build and deploy their applications. - Workflow as a service - Workflow Platform for Mutual Fund NAV processing (Fund accounting) - Prediction analysis for SLA miss. - A real time dashboard for fund processing - Messaging Platform supporting MQ, SFTP, REST, Kafka, FIX, - Trade instruction manager - Customer support system for Bank operators - Platform for Tokenization Assets using Blockchain - A social Media application - A insurance management Platform - Applications developed on Base44 - Loan record reports - OCR for healthcare reports and data processing. - ChatBot for Patient enquiry. - Coin analysis using AI (openAPI integration). - A Platform for affiliate marketing. - CI/CD for Gitlab and AWS.

✔Expert in Java ✔5000+ Hrs worked on Upwork ✔16+yrs Experience ✔Problem Solver Sun Certified Java Programmer with 16+ Years of Professional Experience in Enterprise Application Development. I have excellent Coding Skills and follow Industry Standards to code Scalable Applications that can be deployed on Cloud or On-Premises or Container or Kubernetes or Hybrid Platform. ✅I specialize extensively in Java: ✓ Back-End Frameworks: Spring Boot, Spring, Hibernate, JPA, JSP, Servlets, Java ✓ Front-End Frameworks: Angular, ReactJS, JQuery, and JavaScript ✓ Other Frameworks: Apache Storm, Hadoop, JPPF, ElasticSearch, Hazelcast, Spring Cloud ✓ Cloud Computing: AWS, Google Cloud, Digital Ocean, and Heroku ✓ Security: OAuth2, OpenID Connect, JWT, LDAP, X.509, Kerberos, Social Logins, SSO ✓ Databases: MS SQL, MySQL, Oracle, PostgreSQL, MongoDB, HBase ✓ CI/CD and monitoring: CI/CD using Gitlab, CI using Jenkins and Bamboo, Kubernetes ✓ Agile Methodology: Scrum and Kanban using project management tools like Jira, Pivotal Tracker, Gitlab, etc. ✅My core competence lies in providing End-to-End Solutions to Enterprise Application Development for the Financial, Marine, and Telecom domains. ✅ How can I help you ✓ I can handle your all end-to-end requirements analysis, development & delivery so you can focus on your sales & operations ✓ I can extend/develop your MVP product to production-ready ✓ I can develop products from scratch until the final delivery and support with maintained code quality and proper code coverage ✓ I can choose the right technology stack and tools for your solution based on real needs and can save costs ✓ I can manage the team, do code reviews, handle CI/CD and releases, support live systems ✓ I can understand and implement the most difficult parts of software systems ✅ Expert Areas ✓ Java-based back-end frameworks like Spring Modules (Spring MVC, Spring Security, Spring AOP, Spring Rest, Spring Data/JPA) ✓ Microservice & Cloud native architecture for developing SaaS-based system ✓ RDBMS (MySQL, PostgreSQL, Oracle) ✓ Docker, Kubernetes, OpenId, SSO, SAML, ✓ Graph/Document Databases MongoDB and DynamoDB ✓ Microservices-based architecture implementation with Spring boot, Spring Integration, and Apache Camel ✓ AWS experience with Serverless, RDS, SQS, SNS, SES, S3, VPC, Cloudformation, ECS, Lambda, Cognito and EC2 ✓ AWS API implementation experience ✓ Queue-based implementations with RabbitMQ, ActiveMQ, SQS, and SNS ✓ Test-driven development implementation with unit and integration test cases with JUnit/TestNG + Mockito + Spring ✓ Database integration frameworks like JDBC/Hibernate/Sprint Data (ORM) and Spring Mongo ✓ REST-based Web Service/API implementation with Spring REST ✓ CI/CD implementation with (Bamboo + Jenkins + Maven + Nexus + GIT(Bitbucket/Gitlab/Github) ✓ Payment Gateways implementations like Stripe with Debit/Credit Card Integration ✓ Solr/Lucene/ElasticSearch search engine integration ✓ Agile Methodology ✓ Experience with implementing very complex queries with MySQL DB ✓ Java-based Servers Tomcat/JBoss ✓ Repositories like Git, SVN

❇️ Senior Solution Architect & Full-Stack Engineering Leader | 🌍 16+ Years Experience | 🚀 100+ Global Projects Delivered I specialize in architecting and delivering high-performance, scalable, and intelligent software systems for startups, scale-ups, and enterprise clients worldwide. With over 16 years of hands-on experience, I operate across the full technology spectrum—combining modern frontend frameworks, robust backend architectures, and cloud-native infrastructure to transform complex ideas into production-grade applications. My core strength lies in designing end-to-end solutions—from rapid MVP development to large-scale enterprise platforms, with a strong focus on performance, scalability, and user-centric design. 🔷 Core Expertise ✔️ Enterprise Architecture & Full-Stack Leadership Designing scalable, maintainable systems across web, mobile, and cloud environments. ✔️ Frontend Engineering Excellence React.js, Next.js, Angular, TypeScript Modern UI systems (MUI, Bootstrap) High-performance, responsive, and interactive interfaces ✔️ Backend & API Architecture Node.js (Express, LoopBack), Java (Spring), Python (Django) REST & GraphQL (Apollo) APIs Distributed systems & microservices architecture ✔️ Geospatial & Advanced Mapping Systems CesiumJS (3D Globe), OpenLayers, ArcGIS, Google Maps, Mapbox Real-time geospatial data visualization and processing ✔️ Database & Data Engineering Relational: Oracle, PostgreSQL, MySQL, SQL Server NoSQL: MongoDB, Elasticsearch, AWS DynamoDB High-performance querying and data modeling 🔷 Cloud & DevOps Expertise ✔️ Cloud-Native Architecture AWS (Primary): Lambda, API Gateway, S3, Cognito, Kinesis, Athena CI/CD pipelines using CodePipeline, CodeBuild, CodeDeploy Elastic Beanstalk & serverless application deployment ✔️ Multi-Cloud Capabilities Google Cloud (App Engine, Compute Engine, Cloud Functions) Microsoft Azure (Pipelines, Boards, Repos) ✔️ Version Control & Collaboration GitHub, GitLab, Bitbucket, AWS CodeCommit, Azure Repos 🔷 Integrations & Enterprise Systems ✔️ API Integrations (Extensive Experience) PayPal, Stripe, Zoom, QuickBooks, Twilio, SendGrid, WhatsApp (Meta), Uber, Lyft, Zapier, Expensify, and more. ✔️ Authentication & Security (SSO / OAuth) Auth0, Okta, AWS Cognito, Firebase, Azure AD, and major social platforms. ✔️ CRM, ERP & CMS Systems Zoho, Odoo, Apache OFBiz, HippoCMS ✔️ Data Visualization & Reporting Power BI, Jasper, BIRT, Sisense, Highcharts, Recharts, Chart.js, AMCharts 🔷 Delivery Approach I bring a solution architect’s mindset to every engagement: 📌 Deep technical discovery & architecture planning ⚡ Agile, milestone-driven execution 📈 Scalable, future-ready system design 💬 Clear, consistent stakeholder communication I partner with organizations that require precision, scalability, and long-term reliability in their technology stack. If you’re looking for a senior architect who can lead, design, and deliver complex systems end-to-end, I bring the expertise and execution discipline to turn vision into reality. -- Nikhil Mahajan