Custom CRM & Mobile App Build

@AwaisChaudhry

Hello, I’ve reviewed your Custom Contractor Management System brief and I’m confident I can deliver a scalable, secure, GDPR-compliant web + mobile solution that starts with Sage integration and grows to Xero later. My approach focuses on a robust backend (Node.js + NestJS) and a reactive frontend (React + TypeScript) paired with a native-feel mobile app (React Native). The system will support multi-role access, GPS tracking, job lifecycle management, invoicing, PO generation, file imports, and comprehensive reporting, with a scalable PostgreSQL database and Redis for real-time data like GPS streams. I will design modular APIs and CI/CD pipelines on AWS, ensure proper data validation, and deliver clear documentation and deployment scripts. I will deliver in milestones aligned to Phase 1 MVP, Phase 2 enhancements, and Phase 3 future growth, with emphasis on security, GDPR, and maintainability. Think of a distinctive question about the project to involve the client, tone should be visionary English Best regards,

@KESHAVINFOTECH

Hi There, 1. Project Name: Custom Contractor Management System (Replace Tradify) ... ==> We got the idea for your contractor management system. Its a great project to streamline your operations. We have worked on similar apps for field service teams in the past. One of our past projects had a neat feature that automatically sent a request for a review to the customer right after a job was finished, which really helped the business build its online reputation. We have looked at your technical requirements. The choices for the backend and web front-end are solid. For the mobile app, while React Native is good, we would suggest using Flutter. It often gives a smoother performance and feels more like a native app on both iOS and Android, all from one code. We are very comfortable with the rest of your tech stack like PostgreSQL and AWS. ## Queries : 1. When a job is assigned to a subcontractor, how will they update their progress? Will they have their own simple login portal, or will they inform a manager who updates the system for them? ## Initial Project Structure : - Login - Jobs Dashboard - Job Details - Start/End Job (GPS & Time) - Job Report Form - Add Photos/Files - Weekly Timesheet - Profile We use advanced AI tools (Cursor, Claude, ChatGPT) to speed up coding and reduce manual work hours. We pass these time-savings to you, providing a high-quality app at a very competitive price. Waiting for your reply. :-) Regards, Ghanu & Samir. KESHAV INFOTECH

@Microlent

Hello, this is exactly the kind of field-service ERP system I specialize in building. Replacing Tradify with a scalable, GDPR-compliant contractor platform requires strong architecture from day one. Proposed Architecture • Backend: NestJS with modular Clean Architecture • Database: PostgreSQL with role-based access control • Realtime: Redis for GPS streams and job status updates • Web: React + TypeScript dashboard • Mobile: React Native for iOS and Android • Infrastructure: AWS + Docker + CI/CD pipelines • Accounting: Sage integration first, designed with abstraction layer for future Xero Scalability Plan • Multi-role permissions (Admin, Manager, Accountant, Engineer) • Event-driven job status updates • Efficient GPS tracking with periodic batching • File upload pipeline with validation and duplicate detection • Secure storage aligned with GDPR requirements I have experience building CRM-style and operational systems with reporting engines, invoice workflows, and third-party API integrations. Estimated Timeline Phase 1 MVP: 12-16 weeks depending on integration complexity Milestone-based delivery with documentation and deployment scripts included. Let’s open the chat. I can outline the database schema and module breakdown before we proceed. Best, Jenifer

@OutsourceMan

Hello, Thank you for sharing the detailed scope. We have strong experience building custom ERP/CRM and field-service management platforms, and your contractor management system is very similar to systems we have developed for job tracking, mobile reporting, and invoicing. Our team can build the platform using your preferred stack: Backend: Node.js + NestJS Web: React + TypeScript Mobile: React Native (iOS & Android) Database: PostgreSQL with Redis for realtime GPS caching Infrastructure: AWS + Docker + CI/CD pipelines Proposed Approach Phase 1 – MVP • Engineer mobile app (job list, GPS tracking, job reports, timesheets) • Web dashboard (job management, subcontractor management, reporting) • Invoice module with Sage integration • CSV/XLSX import with validation for subcontractor invoices Phase 2 • Advanced reporting & analytics • Xero integration • Materials & procurement tracking Phase 3 • SaaS multi-company architecture • AI-assisted report summaries • Fleet & asset tracking The system will include secure role-based access, GDPR-compliant data handling, scalable architecture for 500+ engineers, and modular APIs for future expansion. Deliverables • Web dashboard + mobile apps • Full API & database architecture • AWS deployment with Docker & CI/CD • Complete documentation and handover support Estimated MVP timeline: 10–14 weeks, depending on final specifications. We would be happy to review workflows and prepare a milestone plan for development. Best regards, Raman

@corpmember29

Hello, I’ve carefully reviewed your Contractor Management System requirements and fully understand the scale, architecture, and long-term vision (500+ engineers, Sage → Xero integration, SaaS-ready foundation). With 10+ years of experience building CRM/ERP and field-service platforms using Node.js, React, React Native, PostgreSQL, Redis, and AWS, I can deliver a secure, scalable, GDPR-compliant solution in structured phases. Architecture Approach: Backend: Node.js + NestJS (modular, domain-driven structure) Web: React + TypeScript Mobile: React Native (shared logic, optimized performance) Database: PostgreSQL (relational integrity for jobs, invoicing, payroll) Realtime/GPS: Redis + WebSockets Infrastructure: AWS + Docker + CI/CD pipelines Phase 1 (MVP Focus): • Engineer mobile app (GPS tracking, job reports, timesheets) • Web dashboard (job management, reporting, live map view) • Subcontractor module (POs, CSV/XLSX upload with validation) • Quote → Job → Invoice workflow with Sage integration System will include RBAC, encrypted storage, audit logs, file validation handling, push/email notifications, and clear API documentation. Code will follow clean separation of concerns and be milestone-delivered with full documentation and deployment scripts. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. I eagerly await your positive response. Thanks.

@Julian29

Hello, Custom CRM & Mobile App HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT With 15+ years of proven experience building scalable CRM, ERP, and field-service platforms, I clearly understand your requirement to replace Tradify with a secure, GDPR-compliant contractor management system designed to scale from 9 to 500+ engineers. The goal is to deliver a robust, cloud-based contractor ecosystem that unifies job management, GPS tracking, subcontractor control, and accounting integration under a scalable architecture. -->> NestJS + PostgreSQL backend architecture -->> React web dashboard with RBAC -->> React Native engineer app (GPS + job reports + timesheets) -->> Sage integration (Xero-ready structure) -->> CSV/XLSX invoice import with validation -->> AWS Dockerized CI/CD deployment My approach will focus on clean layered architecture, scalable database design, secure API integrations, Redis-powered real-time GPS tracking, and milestone-based agile delivery with structured documentation at every phase. I would begin with architecture mapping and wireframes to validate dashboard and mobile flows before moving into MVP backend and app development to ensure long-term scalability and clean separation of concerns. Let’s connect in chat as I have several key technical questions regarding Sage API scope, GPS polling frequency, and projected data growth so we can architect this correctly from day one. Thanks & regards Julian

@Rekhathakur

Hello I have thoroughly reviewed your project description and am confident in my ability to assist you in completing it successfully. I believe it would be highly beneficial to delve deeper into the specifics of the job to determine the most effective way forward. I am open to scheduling an interview at your convenience, and I genuinely appreciate the chance to collaborate with you on this project. Your response is eagerly anticipated, and I'm excited about the prospect of working together. Thank you for considering my proposal. Looking forward to your prompt reply! Best regards Rekha!!!

@DeveloperStation

Hi there, We’ve built similar systems that manage multiple roles, such as managers, technicians, and customers, with features like job scheduling, invoicing, and payment integrations. Our solutions are designed to be scalable and secure, with a strong focus on delivering a seamless user experience. As a full-stack developer with 15 years of experience, I’ve worked extensively with both front-end and back-end technologies. I’m equally comfortable with server management and CI/CD pipelines, ensuring that every aspect of your project is handled by a dedicated expert. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m looking forward to hearing more about your exciting project. Best, Adil

@kanika6665

Hello, I am thrilled to propose my services for the development of your Custom Contractor Management System, encompassing a full web platform, mobile applications, and a robust database setup to streamline your operations efficiently. With over a decade of experience in SEO and digital marketing, I am confident that my expertise in strategic planning and execution can be leveraged to create a tailored solution that meets your requirements. I envision developing a scalable, secure, and GDPR-compliant system that seamlessly integrates with Sage and Xero, supporting job management, subcontractor supervision, GPS tracking, invoicing, and detailed reporting functionalities. In collaboration with my team, we will meticulously craft the backend and frontend structures, mobile applications, and a reliable database architecture aligned with your specifications and technical requirements. Our approach prioritizes transparent communication, milestone-driven progress, and a commitment to delivering high-quality, innovative solutions. What is the preferred timeline you have in mind for the project completion? Looking forward to discussing this further with you. What is the preferred timeline you have in mind for the project completion?

@mrresearcher99

Hello, Your contractor management platform aligns well with my experience. I have 5+ years in full-stack development, building scalable web and mobile systems using React, React Native, Node.js, PHP, and cloud deployments. Relevant experience Built CRM/ERP and field-service style applications Implemented real-time GPS tracking, timesheets, and job workflows Strong mobile expertise (Android, iOS, React Native, Flutter) Experience with AWS, Docker, CI/CD, and secure role-based systems Worked on invoicing, reporting, and third-party integrations Approach: I’ll follow your NestJS + React + React Native architecture, design a scalable PostgreSQL schema, use Redis for live GPS performance, and build a robust CSV/XLSX validation pipeline. Sage integration will be production-ready and Xero-ready for Phase 2. Estimated MVP timeline Architecture & setup: 1 week Core modules: 5–7 weeks Testing & deployment: 1–2 weeks I work milestone-wise with clean documentation and am ready to start immediately. Let’s discuss Phase 1 priorities. Best, Bhargav

@royalwebraisers

Hi, As per my understanding, you need a scalable contractor system replacing Tradify: React Native mobile for engineers (GPS/jobs/timesheets), React web dashboard, NestJS/PostgreSQL backend, Sage invoicing, subcontractor tools—all AWS-deployed, phased MVP first. Implementation approach: - NestJS API with Prisma for PostgreSQL, Redis realtime GPS, JWT roles. - React dashboard + React Native apps (Expo), file uploads/CSV validation. - Sage integration via API, Docker/AWS deploy with CI/CD milestones. I'll share my portfolio on your first message. Excited for this build. Queries: 1. Sage API version/details? 2. MVP timeline goal? 3. Current engineer count/tech setup? Best regards,

@khurshid040462

Hello, I’m excited about your project to build a Custom Contractor Management System. With over five years of experience in developing scalable applications using Node.js, React, and PostgreSQL, I’m well-equipped to handle both the backend and frontend components required for your system. My approach will include creating a robust web dashboard for managing jobs, subcontractors, and invoicing, while ensuring that the mobile app provides instant access to job lists and GPS tracking for engineers. I suggest implementing real-time notifications to keep all users updated, enhancing task completion rates. In a previous project, I successfully built a similar system for a logistics company, which streamlined their operations and improved reporting efficiency. I anticipate this project can be completed in 12 to 16 weeks, depending on feedback cycles. Best regards, Khurshid Ahmed

@skyfinley

As an experienced digital systems architect and seasoned full-stack developer, I am confident in my ability to deliver on the unique challenges of your contractor management system project. With a history of successful projects spanning over two decades, I am no stranger to complex builds. In particular, my skills in Node.js, React, and PostgreSQL align perfectly with your needs for the backend web component of your CRM system. In addition, my mastery of AWS and Docker ensures that your application will be hosted securely and efficiently. Furthermore, I understand the importance of scalability in your application and can weave elements into the project from its earliest stages that don't sacrifice quality or security but keep future expansion squarely within a well-thought-out plan. Having built numerous CRMs and field service apps over the years, including leveraging API integrations such as Sage and Xero, I have gained deep insights into providing a smooth user experience in complex multi-role environments like yours. Finally, one aspect that sets me apart is my dedication to clear communication and ongoing support. Through fast delivery times and performance-oriented mentality, I ensure successful deployment at every stage. My strong English skills not only aid in effective communication but also enable me to provide thorough documentation – something you emphasized as paramount. Trust me to bring all these capabilities t

@mahig47

Hello! As per your project post, you’re looking to build a full Custom Contractor Management System to replace Tradify, that manages engineers, subcontractors, job workflows, GPS tracking, timesheets, invoicing, and financial reporting within one unified ecosystem. The goal is to streamline daily field operations, improve financial visibility, and support growth from 9 engineers today to 500 plus in the future, while ensuring security, GDPR compliance, and accounting integration with Sage first and Xero later. My focus will be on delivering a complete web and mobile ecosystem featuring job management with file attachments and status tracking, subcontractor assignment with PO generation and invoice tracking, quote to job to invoice workflows, recurring and deposit invoicing, CSV and XLSX validation imports, GPS tracking with live map and route playback, engineer job reports with photos and materials tracking, timesheets with weekly summaries, profit and material usage reports, and role based access for Admins, Managers, Accountants, and Supervisors. I specialize in Node.js with NestJS for structured backend services, React with TypeScript for robust dashboards, React Native for production ready mobile apps, and PostgreSQL with Redis for scalable data and realtime handling. Let’s connect to review your detailed specifications and define a phased roadmap that ensures stability at launch while supporting rapid growth. Best regards, Nikita Gupta.

@mobiappsoftware

Hello, I will develop your CONTRACTOR MANAGEMENT SYSTEM MOBILE APPLICATION for Android and IOS both platforms with Web admin panel. I am Tulsiram. I have 10 years of experience working as Native and Crossplatform mobile application developer. I am understood your requirements. I am glad if we are working together. If you interested then let's connect. I will provide you Daily updates ,source code after development completed, 1 Year maintenance Support in following Steps: I will available daily 10-12 hours in Working days for you. I will provide you regular updates according to which modules we will decided. After approval each module by you then i will provide your complete source code of your project and will shift on your Domain. Thanks

@technologiesit

As a seasoned developer with over 10 years in the field, my team and I have honed our skills to perfectly align with your project requirements. Our proficiency in Node.js, React, PostgreSQL, and AWS makes us an excellent fit for your full contractor management system. We have extensive experience in building CRM/ERP/field service apps which aligns perfectly with the scope of this project. Moreover, we excel not only in development but also in design. This means when we deliver your solution it would not just boast of functionality but also maintain a high level of aesthetics ensuring positive user engagement. Working along with you hand-in-hand and providing you with utmost satisfaction is what drives us and I truly believe this project offers immense possibilities for mutual growth. So let's join hands to build a dynamic and robust contractor management system that will take your business to new heights.

@rbtech1984

Hi There!!! ★★★★ ( Custom CRM & Mobile App Build ) ★★★★ I understand you need a full custom contractor management system to manage engineers, subcontractors, jobs, timesheets, invoicing, and GPS tracking, scalable for 500+ users, secure and GDPR-compliant, with Sage integration first and Xero later. The project covers web dashboard, mobile apps, invoicing, subcontractor module, and reporting with real-time GPS tracking. Services mentioned here based on project details ⚜ Web dashboard development with job, client, and subcontractor management ⚜ Mobile app for engineers with GPS, job reports, timesheets, and photo uploads ⚜ Subcontractor module with POs, invoice tracking, and reminders ⚜ Invoicing system with Sage integration and PDF export ⚜ File upload/import with CSV/XLSX validation ⚜ Reporting: job summary, timesheets, GPS history, profit analysis ⚜ Deployment on AWS with Docker, CI/CD, push/email notifications, GDPR compliance With 9+ years experience building CRM/ERP and field service apps, I deliver clean architecture, scalable design, and robust API integrations. I will use Node.js + NestJS, React + TypeScript, React Native, PostgreSQL, Redis, and AWS for real-time features. Let’s collaborate to build a high-quality, fully functional system. Warm Regards, Farhin B.

@pinkeegupta

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native, and for web and backend on react js and node js, Python Django , java spring boot and php CodeIgniter mvc. Please consider me and initiate a chat for further detailed discussion. Regards, Anju

@santoshkumars17

The vast scope and complexity of your project requires an exceptional developer, well-versed across multiple technologies, who not only meets the technical proficiency but can also deliver seamlessly across all the phases. I firmly believe my 5+ years of professional experience as a Full Stack Web and Mobile App Developer make me a suitable candidate. Having worked extensively with Node.js and React Native, I possess strong expertise in building scalable, real-time web applications like the one you're seeking to create. Integration is at the core of my development experience, be it dealing with Payment gateways, Database Management or APIs for platforms like Sage/Xero. Moreover, my strategic and structured approach towards application development makes me highly reliable for delivering phased projects like yours on time. My skillset combined with my discipline in creating thorough documentation and providing full technical support makes me an ideal fit to lead the team in building a custom contractor management system. To sum it up, I offer the combination of technical skill, experience and passion to turn your idea into reality