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Senior Full Stack Developer – Enterprise Business Management Platform Project Overview We are seeking an experienced Full Stack Developer to complete the development of an enterprise SaaS platform designed for companies that provide field and on-site services. The platform is intended to replace multiple disconnected systems by providing a single solution for managing the entire business operation—from customer acquisition to service delivery, invoicing, reporting, and long-term customer relationships. The application will support multiple independent companies (multi-tenant architecture), each operating under its own branding, users, permissions, and data while sharing the same cloud infrastructure. This is a large-scale commercial software project that combines desktop, mobile, web, and cloud technologies into a unified ecosystem. ⸻ Functional Scope The platform includes the following business areas: Executive Dashboard * Business KPIs * Revenue tracking * Operational metrics * Team performance * Financial summaries Customer Relationship Management (CRM) * Lead management * Sales pipeline * Customer database * Service history * Communication tracking Scheduling & Dispatch * Calendar management * Appointment scheduling * Technician assignment * Route planning * Recurring services * Real-time job status Field Operations * Work orders * Job management * Mobile workforce * GPS location tracking * Photos and job evidence * Digital signatures * Service completion Customer Management * Customer profiles * Multiple service locations * Documents * Service contracts * Customer communications Employee & Team Management * Employees * Teams * Roles * Permissions * Availability * Workforce assignments Inventory Management * Products * Equipment * Materials * Warehouses * Stock movement * Purchase orders * Supplier management Financial Management * Estimates * Quotes * Invoices * Payments * Expenses * Financial reports Marketing * Campaign management * Lead tracking * Website inquiries * Marketing analytics Customer Portal Customers must be able to: * View appointments * View invoices * Make payments * Submit service requests * Download documents * Review service history Website Management Each company must have: * Public website * Contact forms * Service request forms * SEO-ready pages * Custom branding Reporting The system should generate reports for: * Sales * Operations * Finance * Inventory * Employee productivity * Customer activity * Business performance Administration * Multi-company management * Role-based security * User administration * Subscription management * Audit logs * System configuration ⸻ Technical Architecture The solution consists of: * Desktop Application (Electron + Node.js) * Mobile Application (Flutter) * Backend REST API * AWS Cloud Infrastructure * SQL Database * Secure Authentication * File Storage * Notification Services All applications must communicate with the same centralized backend hosted on AWS. ⸻ Expected Deliverables The selected developer (or team) will be responsible for: * Backend development * Desktop application * Flutter mobile application * API integration * Database implementation * AWS deployment * Authentication & authorization * Testing * Technical documentation * Production deployment ⸻ Development Methodology * Agile Development * Weekly Friday progress meetings * Source code managed with Git * Clean Architecture * Modular design * Scalable codebase Estimated implementation time: 8–10 weeks Please provide: * Fixed-price proposal * Estimated development timeline * Team size (if applicable) * Similar enterprise SaaS projects completed * Technology recommendations (if any) * Suggested architecture improvements * Post-launch support options
Project ID: 40594521
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253 freelancers are bidding on average $7,157 USD for this job

A Warm Hello! We are readily available to start working on this project! We are confident to provide you unified, enterprise-grade business management platform for field service companies and this is exactly the type of large-scale SaaS solution our team specializes in delivering. We would be excited to partner with you to complete the development of this platform and help bring it to production with a scalable, secure, and future-ready architecture. We understand that the solution will centralize every aspect of business operations, including: - Executive dashboards with business KPIs and financial insights - Complete CRM and sales pipeline management - Intelligent scheduling and technician dispatch - Field workforce management with GPS, digital signatures, and work orders - Customer management and communication - Inventory and warehouse management - Financial operations including estimates, invoices, expenses, and payments - Marketing and lead tracking - Customer self-service portal - Website management with custom branding - Enterprise reporting and analytics - Multi-company administration with subscription management We would welcome the opportunity to discuss your current progress, review the existing codebase (if available), and provide a detailed milestone plan, fixed-price estimate, and implementation roadmap. We look forward to becoming your long-term technology partner. Best regards, Ana
$10,000 USD in 70 days
10.0
10.0

Having developed a diverse portfolio of successful applications and websites over my 7-year career, I am certain I am the right person to lead this project. My skills in HTML, MySQL, PHP, and Website Design are directly applicable to the scope of this project. I bring extensive SaaS experience, having previously built multi-tenant platforms from scratch. In terms of backend development, API integrations, and database implementation, I am well-versed in the essentials needed to make your system run seamlessly and efficiently. Furthermore, my familiarity with AWS and its associated services will ensure a smooth cloud infrastructure implementation. Security will be paramount but is no concern with my well-researched SSL Certificates application. I am a firm believer of Agile methodology as it allows for adaptability in unexpected surges as seen in COVID-19 pandemic. This translated into simplicity of using Git as my source code manager -ensuring a smooth contribution even from other developers during the development process. Having an elegant end product free from technical debt and any security issues is etched as one of my highest priorities - so clean architecture and modular design will be fully integrated into your platform.
$10,000 USD in 90 days
9.6
9.6

With over a decade of experience in full-stack architecture and high-scale systems, I understand the critical need for an enterprise SaaS platform for On-Site Services Management. Your goal of streamlining business operations through a centralized solution aligns perfectly with my background in developing high-complexity systems for over 1 million users in FinTech and health sectors. To ensure scalability and security for your project, I recommend leveraging a modular design approach coupled with clean architecture principles. As evidenced by my successful development of Telegram Mini Apps serving a vast user base, I am well-equipped to handle the intricacies of managing multiple independent companies within a shared cloud infrastructure. I encourage you to reach out to discuss the roadmap ahead and how my expertise in full-stack development, Flutter mobile applications, AWS deployment, and secure authentication can contribute to the seamless delivery of your enterprise platform. Let's collaborate to bring your vision to life efficiently and effectively.
$8,000 USD in 60 days
9.2
9.2

Hi there, We understand you're looking for a senior full-stack developer to complete an enterprise SaaS platform for managing on-site services, aiming to integrate multiple business operations into a single solution. Our team at Webbook Studio has experience with similar large-scale projects, such as developing a learning platform website and a website for an electric bike company, both utilizing PHP, custom design, and WordPress. We're proficient in technologies like Node.js, Flutter, and REST API, which align with your project's requirements. We'll deliver a scalable, secure, and well-documented solution, including backend development, desktop and mobile applications, API integration, and AWS deployment. One question: Are there any existing brand guidelines or design preferences that need to be incorporated into the platform's UI/UX? Feel free to message us to discuss the details! — Webbook Studio
$5,300 USD in 30 days
9.3
9.3

With over a decade of full-stack development experience, I am confident in delivering exceptional results for your enterprise business management platform. By utilizing a multi-tenant architecture, we will streamline operations for field service providers while ensuring data isolation and cost efficiency. Our solution will encompass desktop, mobile, web, and cloud technologies to create a unified ecosystem focusing on executive dashboards, CRM, field operations, inventory management, and marketing. The technical architecture includes a Desktop Application (Electron, Node.js), Flutter mobile app, robust REST API, secure authentication, AWS cloud infrastructure, SQL database, file storage, and notification services. Following an Agile methodology, we anticipate an 8–10 week implementation timeline with a focus on user experience, security, and performance. Our team of experts will handle backend development, desktop/mobile apps, API integrations, database management, AWS deployment, testing, documentation, and production deployment. Let's discuss your requirements in a virtual meeting to align our technological recommendations with your business goals and provide post-launch support for your platform's success.
$9,000 USD in 5 days
8.9
8.9

Hi — Elias here from Miami. I understand you’re looking to develop a SaaS platform for managing on-site services, which is crucial for streamlining operations and enhancing customer satisfaction. The real technical challenge often lies in scalability and integrations. As your user base grows, maintaining performance without sacrificing reliability becomes essential. Additionally, ensuring smooth integration with existing systems can complicate the architecture. What usually matters most is how well permissions and data flow are managed across different user roles. To address these challenges, I would design the system with a modular architecture, allowing for future expansion and easier maintenance. Implementing RESTful APIs will ensure seamless integrations. Focusing on state management will help in effectively managing user sessions. I have experience with similar platforms that required robust backend solutions and scalable architectures, ensuring optimal performance as user demand increases. A few questions to better understand the scope: Q1 – What specific user roles do you envision within the platform? Q2 – Are there existing systems you need to integrate with? Q3 – What scaling expectations do you have for user growth over the next year? Happy to discuss details and suggest the best technical approach. Looking forward to hearing from you.
$8,000 USD in 26 days
8.4
8.4

Greetings! I'm a seasoned Full Stack Developer with 8+ years of experience, having worked with 100+ clients on various enterprise-level projects, including SaaS platforms and multi-tenant architectures. My specialization lies in developing scalable and secure solutions using Node.js, Electron, and Flutter, with a strong focus on AWS cloud infrastructure and SQL databases. I've delivered similar projects, ensuring seamless integration and high-performance capabilities. To tackle this project, I'll employ an Agile development methodology, with weekly progress meetings to ensure transparency and timely delivery. My approach involves: * Conducting a thorough analysis of the project requirements and creating a detailed roadmap * Designing a modular and scalable architecture, with a focus on clean code and secure authentication * Developing the backend REST API, desktop application, and Flutter mobile application, with API integration and database implementation * Deploying the solution on AWS, with secure file storage and notification services * Conducting thorough testing, including unit testing, integration testing, and performance testing * Providing technical documentation and ensuring a smooth production deployment I'll work closely with you to ensure that the solution meets your expectations, providing regular updates and demonstrations. My goal is to deliver a high-quality, scalable, and secure SaaS platform that exceeds your business needs. Best regards, M H B
$10,000 USD in 18 days
7.8
7.8

Hi there, We are excited about the opportunity to work with you on developing your website. With strong experience in both front-end and back-end development, We can build a robust, scalable, and user-friendly platform that supports all the core features you’re looking for and tailored as per your requirement. Why Us? • 10+ years of experience in full-stack development • Built several website in all kind of domain platforms (portfolio available on request) • Strong grip on user flows, admin control, and clean UI/UX design • Expertise in PHP, JavaScript, MySQL, HTML/CSS, Laravel and modern frameworks Timeline & Estimate: Depending on final scope after the detail discussion with you We’d love to discuss your vision further and share relevant portfolio examples. Let’s build something powerful together! Looking forward to your response. Best regards, Vishal Nasit
$5,000 USD in 35 days
8.0
8.0

Hello, I can help with your "SaaS Platform for On-Site Services Management" project. I develop clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, website design, mysql, html, agile development, full stack development, flutter, rest api, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. You'll get clean commits and clear documentation. Can we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$8,000 USD in 158 days
7.6
7.6

⭐⭐⭐⭐⭐ Build Your Enterprise Business Management Platform with a Full Stack Expert ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for a Senior Full Stack Developer for your enterprise SaaS platform. Look no further; Zohaib is here to assist you! My team has successfully completed 50+ similar projects for business management platforms. I will use Agile methods to ensure timely delivery and provide ongoing support within the same budget. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in full stack development, focusing on SaaS platforms, API integration, and cloud solutions. My expertise includes database management, user authentication, and mobile application development. Additionally, I have a strong grip on AWS and other relevant technologies to deliver a seamless solution. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I'm looking forward to our conversation! ➡️ Skills & Experience: ✅ Full Stack Development ✅ API Integration ✅ AWS Cloud Solutions ✅ Database Management ✅ Mobile App Development ✅ User Authentication ✅ Agile Methodology ✅ UI/UX Design ✅ Testing & Debugging ✅ Modular Architecture ✅ Technical Documentation ✅ Performance Optimization Waiting for your response! Best Regards, Zohaib
$6,000 USD in 2 days
7.8
7.8

You're building SaaS Platform for On-Site Services Management, where the real delivery risk is usually in the workflow details, not just the feature list. I have handled similar systems where the important part was turning a broad brief into a reliable working version. My approach would be to first define the input schema, generation rules, and output validation, then build the workflow around those controls so AI output stays consistent. For this project, I would focus especially on: - Input workflow design, prompt/control rules, and output validation - Backend processing, file/document generation, and dashboard usability - Scalable cloud structure, API boundaries, and error handling If helpful, I can map the input-to-output workflow and where validation should sit before implementation. Best, Dr. Syafiq
$7,500 USD in 21 days
7.6
7.6

Hello! I am glad to say that I have already developed an On-Site Services & Operations Management Platform that enables multi-tenant service providers to manage field workforce dispatch, CRM, and end-to-end service delivery through a unified ecosystem. The system supports multi-tenant branding, role-based security, automated invoicing, inventory tracking, and field management while providing a scalable foundation across web, mobile, and desktop. My approach would begin with structuring the multi-tenant architecture on AWS, followed by building the centralized REST API to power your Electron app, Flutter mobile app, and client web portals. I will focus on implementing dispatch workflows, inventory control, executive reporting, and tenant-specific website management. I specialize in Electron, Node.js, Flutter, SQL, REST APIs, AWS, and multi-tenant SaaS architecture. To ensure we align on the platform's core functional logic, I have a few key questions: Let's connect to discuss your requirements and build a reliable enterprise platform. Best regards, Nikita Gupta
$5,000 USD in 45 days
6.9
6.9

Hi, I'm interested in your project "SaaS Platform for On-Site Services Management". I have relevant experience and can deliver quality results within your timeline and budget. I'd love to discuss the details. Please feel free to reach out.
$5,000 USD in 7 days
6.8
6.8

Hi there, I am excited about the opportunity to collaborate on developing your SaaS platform for on-site services management. With extensive experience in building comprehensive enterprise solutions, I am confident in delivering a robust platform tailored to your requirements. My expertise spans PHP, MySQL, HTML, and the full stack development needed to integrate desktop, mobile, web, and cloud technologies seamlessly. I understand the need for a multi-tenant architecture that supports independent companies while maintaining a centralized infrastructure. My approach will focus on scalable, modular design, ensuring the platform can manage everything from CRM and scheduling to financial management and reporting efficiently. I have successfully completed similar SaaS projects and am well-versed in Agile methodologies, ensuring smooth progress and communication throughout the development process. For the technical architecture, I propose leveraging Electron for the desktop app, Flutter for the mobile app, and REST APIs for backend communication, all hosted on AWS. This will ensure a responsive and secure system that meets all functional scope areas, from executive dashboards to customer portals. I am committed to not only delivering a high-quality product but also providing post-launch support to ensure your platform's success. Looking forward to the opportunity to bring this vision to life. Best Regards, Efanntyo
$7,500 USD in 60 days
6.7
6.7

Hello!, I am a Florida-based senior software engineer(frontend, backend, ecommerce, etc) and I read your SaaS Platform for On-Site Services Management description carefully. This is the kind of platform I enjoy building because it needs to be practical, reliable, and easy for real teams to use. I have about 15 years of experience with PHP, MySQL, HTML, REST APIs, Agile development, full stack architecture, and Flutter apps. I’ve built SaaS platforms, dashboards, workflow systems, and internal business tools where clean structure and maintainability matter. My approach would be: 1. confirm roles and workflow 2. map the core modules and data model 3. build the backend/API foundation 4. develop the web app and Flutter client 5. test, refine, and deploy in phases I pay close attention to details, and that usually makes the difference between a basic build and a system that actually works well in production. Relevant work includes service management dashboards, job dispatch systems, field operations portals, and CRM-style SaaS tools. Could you please clarify the following questions to help me better understand the project? 1. What are the main user roles and permissions? 2. Do you already have a defined workflow for scheduling, service tracking, and reporting? 3. Should this be web-first with Flutter as a companion app, or built together from day one? If we align on scope early, I can help deliver a solid platform without wasted time. -James
$8,500 USD in 27 days
6.5
6.5

I understand the challenge of unifying multiple disconnected systems into one seamless SaaS platform supporting multi-tenant operations. In a recent project for a mid-sized service company, I helped deliver a platform with integrated CRM, scheduling, mobile workforce management, and invoicing under one backend, streamlining their workflows and improving data consistency. For your solution, focusing on a robust API layer with strict tenant data isolation is key. I suggest implementing role-based access control early to secure sensitive operations across companies. Also, considering AWS Lambda for some backend functions could improve scalability and cost-efficiency over a purely server-based approach. Could you share which parts are already developed and where you see the biggest blockers? This will help me plan the final 8-10 week delivery accurately. I plan a modular approach keeping the architecture clean for easy future maintenance. I can handle backend, desktop (Electron), and Flutter mobile development, providing end-to-end integration, testing, and documentation. Post-launch support is also an option to ensure smooth operations. Ready to start immediately and deliver your enterprise platform on time.
$5,000 USD in 7 days
6.1
6.1

Hi, I’ve worked on similar SaaS platforms where the main challenge is building a scalable foundation that supports multiple businesses, users, and workflows without creating future limitations. Your field-service platform requires careful architecture across CRM, scheduling, mobile operations, customer portals, inventory, and financial modules. I would recommend a modular backend API with a strong multi-tenant data structure, secure role permissions, and shared services connecting Electron, Flutter, and web applications. My approach would start with architecture planning, database design, authentication, and core business modules before expanding into mobile, desktop, AWS deployment, and reporting features. I’ll provide clean source code, documentation, testing, and deployment support. I’d like to discuss your current development status, existing codebase, and MVP priorities to suggest the best milestone plan and timeline. Best Regards, Fizza Nadeem k
$5,000 USD in 10 days
6.2
6.2

With over a decade of experience building software solutions for more than 500 companies and a track record of delivering quality work, my team and I are highly equipped to handle the complex nature of your project. Our services cover a broad spectrum in the development space that spans from creating chatbots to deploying complete data pipelines, extending to include SaaS platforms. We have been pivotal in integrating AI into different systems successfully. From our collective knowledge and experience, we see several opportunities for your project architecture that can streamline performance and enhance scalability. Our development methodology aligns perfectly with your requirements. We are experienced in Agile Development, employing clean architecture and modular design processes that guarantee efficient codebase management. Being active contributors on Slack, our team exhibits real-time problem solving by closely working with clients. This trait has made us notorious for our prompt responses; you'll never have to wait for extended periods to get a question answered or issue resolved.
$7,500 USD in 7 days
6.0
6.0

As a senior full stack developer with a specialization in Flutter and extensive experience in creating complex web applications just like the one you are seeking to develop, I am confident that my skills, industry knowledge, and meticulous approach will make me a valuable addition to your project. Over the last decade, I’ve successfully completed numerous enterprise SaaS projects with multi-tenant architecture, personalised branding, and tailored user permissions. By applying my expertise in languages such as HTML and PHP alongside my familiarity in MySQL databases, I'm fully capable of handling the scope of your project. Combined with my experience working on distributed systems and multilayered architectures in cloud deployments, I'll ensure a secure and scalable backend implementation optimizing every component's functionality. Moreover, having worked with Agile methodologies for several years has provided me an innate understanding of how to organize teams and schedules effectively to adhere to tight timelines. This means that not only I can provide you with the technical expertise needed but also ensure efficient communication during the development process. It would be an honor to leverage my skills and contribute to building such mission-critical software that will significantly improve business operations for companies providing on-site services. Let's get started!
$5,000 USD in 30 days
5.5
5.5

Hi, Before any timeline or price means anything here, the critical question is what "complete the development" actually covers - what's already built, what's partially built, and what exists only in spec. An enterprise platform at this scope takes a team months; the delta between what's done and whats needed is the only thing that produces a real estimate. The stack you've described is the right one - Laravel or NestJS backend, Flutter mobile, Electron for desktop, AWS infrastructure, multi-tenant data isolation per company. I've built multi-tenant SaaS platforms with role-based permissions, field operations workflows, and mobile plus web surfaces. The architecture decisions (shared schema vs separate databases per tenant, how real-time GPS sync works with the backend, offline-first mobile approach) are where complexity lives. Share what's already built and the current codebase state - that's where any honest scope conversation starts. Q1- Of the modules listed (CRM, Dispatch, Field Ops, Inventory, Finance), which are fully functional today and which are only partially built? Q2- Is the multi-tenant isolation already implemented at the database layer, or is that part of what still needs building?
$10,000 USD in 55 days
5.4
5.4

Miami, United States
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