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Senior Full Stack Engineer – Cnstrux ERP v2.0 React | TypeScript | Node.js | PostgreSQL | AWS | AI Integrations About Cnstrux Technologies Cnstrux Technologies is building a next-generation, AI-powered ERP platform designed specifically for the construction and field service industries. Our mission is to create an operating system that is: * Faster and easier to use than Salesforce * Mobile-first and highly intuitive * Enterprise-grade and scalable * Built specifically for construction operations and field teams * Powered by AI and workflow automation * Designed to become a multi-industry ERP platform over time This is not a website project or simple CRUD application. We are building a modern enterprise software platform that will serve as the foundation of our companies and future SaaS offerings. ⸻ Position Overview We are seeking a highly skilled Senior Full Stack Engineer to join our development team and help accelerate the buildout of Cnstrux ERP v2.0. You will work alongside our existing engineering team to design, build, and optimize a large-scale, multi-module ERP platform. The ideal candidate has experience building complex SaaS applications, enterprise dashboards, workflow systems, and scalable backend architectures. This is a long-term opportunity for someone who enjoys solving difficult engineering challenges and building products from the ground up. ⸻ Technology Stack Frontend * React * TypeScript * [login to view URL] * Tailwind CSS * React Query * Zustand Backend * Node.js * TypeScript * Express or NestJS * REST APIs * WebSockets Database * PostgreSQL * Prisma ORM Infrastructure * AWS * Docker * GitHub Actions * CI/CD Pipelines Integrations * Salesforce * Twilio * Stripe * Google Maps * NearMap * OpenAI APIs * Internal AI Agent Frameworks (Vektr) ⸻ What You’ll Build * CRM & Customer Management * Communities & Projects * Job Files * Scheduling Center * Estimating Platform * Material Management * Purchase Orders * Vendor Portal * Customer Portal * Financials & Invoicing * Warranty Management * Reporting & Analytics * Performance Center * Safety Center * Mobile Field Service Application * AI Workflow Automation & Copilots ⸻ Responsibilities * Design and develop scalable frontend and backend applications * Build reusable and maintainable component libraries * Architect clean and secure APIs * Develop complex dashboards and data visualization tools * Build workflow automation and business process engines * Implement role-based permissions and audit logging * Optimize database performance and query efficiency * Collaborate with product leadership and engineering teams * Participate in architecture discussions and technical decision-making * Deliver clean, tested, and production-ready code ⸻ Required Qualifications * 5+ years of Full Stack development experience * Strong proficiency in React and TypeScript * Strong proficiency in Node.js * Experience with PostgreSQL and relational database design * Experience building SaaS applications * Experience designing REST APIs * Experience with AWS and cloud infrastructure * Experience using Git and collaborative development workflows * Strong communication skills in English * Ability to work independently and take ownership of features ⸻ Preferred Qualifications * ERP or CRM development experience * Construction technology experience * Field service management experience * Multi-tenant SaaS architecture experience * Experience building drag-and-drop scheduling interfaces * Experience with real-time systems and WebSockets * Experience integrating AI and LLM APIs * Mobile-first and responsive application design experience * Experience building enterprise permission systems ⸻ Compensation * Contract / Freelance * Long-term engagement * 40+ hours per week * Potential opportunity to become a core member of our engineering organization ⸻ To Apply, Please Provide 1. Resume or CV 2. Portfolio and GitHub profile 3. Examples of SaaS applications you have personally built 4. Description of the most complex system you have developed 5. Preferred hourly rate 6. Weekly availability 7. Time zone 8. Examples of ERP, CRM, dashboard, scheduling, mobile, or AI projects ⸻ Screening Questions 1. Have you built an ERP or CRM platform from scratch? Please describe it. 2. Have you designed a multi-tenant SaaS application? 3. What is the largest application you have built and what was your role? 4. Have you implemented role-based permissions and audit logs? 5. Have you built drag-and-drop scheduling interfaces? 6. Have you integrated OpenAI or other LLM APIs? 7. How would you architect an ERP platform that is faster and easier to use than Salesforce? 8. Provide links to applications you have personally developed and describe your specific contributions. Important: Generic proposals, AI-generated cover letters, and applicants who cannot demonstrate ownership of complex SaaS products will be automatically rejected.
Project ID: 40530388
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⭐⭐⭐⭐⭐ Build Scalable ERP Solutions as a Senior Full Stack Engineer ❇️ Hi My Friend, I hope you are doing well. I reviewed your project requirements and see you are looking for a Senior Full Stack Engineer for Cnstrux ERP v2.0. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ projects in building complex SaaS applications. I will leverage my expertise in React, Node.js, and AWS to create a robust ERP platform that meets your needs. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in full-stack development, focusing on React, TypeScript, Node.js, and PostgreSQL. My strong skills in designing REST APIs and building scalable applications ensure high-quality outcomes. I also have solid experience with AWS and CI/CD pipelines. ➡️ Let's have a quick chat to discuss your project in detail. I can show you samples of my previous work, demonstrating my capability in building effective software solutions. Looking forward to our discussion! ➡️ Skills & Experience: ✅ React ✅ TypeScript ✅ Node.js ✅ PostgreSQL ✅ AWS ✅ REST APIs ✅ Docker ✅ CI/CD Pipelines ✅ WebSockets ✅ Tailwind CSS ✅ Prisma ORM ✅ GitHub Actions Waiting for your response! Best Regards, Zohaib
$3,400 USD in 2 days
7.7
7.7

Hi, there. I have carefully reviewed the technical issues you are currently facing with Cnstrux ERP v2.0: Full Stack Engineer Needed. When a system is unstable or experiencing downtime, I know that speed and accuracy are your top priorities. My team and I specialize in high level technical support and system recovery. We have helped other businesses in United States resolve critical issues ranging from database failures and security vulnerabilities to server side performance bottlenecks. We do not believe in applying temporary patches; we focus on performing a root cause analysis to ensure that the problem is solved permanently so your business operations can remain stable. Our goal is to stabilize your environment while ensuring that your data integrity remains the top priority throughout the process. To help me begin the diagnostic process immediately, I have one quick question: Have you made any recent changes to your server configuration, plugins, or third party integrations that might have triggered this issue? Knowing this helps me narrow down the scope of the fix and get your system back online as quickly as possible. I am available to start the diagnostic process immediately if you are ready to proceed. Best regards Kausar and the Team
$3,000 USD in 21 days
6.8
6.8

Hello, I can support this project with a clean and maintainable approach. My focus would be a front-end implementation that is easy to maintain and extend. I can start by reviewing the existing access/files, then implement and test the requested changes. I also noticed the listed skills include JavaScript NoSQL Couch & Mongo Amazon Web Services Node.js PostgreSQL Docker Full Stack Development SaaS REST API AI Development. I am confident that I can positively contribute to the buildout of Cnstrux ERP v2.0. Moreover, I have a robust background working on complex SaaS applications much like what you are building. My thorough understanding of REST API and proficiency in AWS will ensure I deliver clean code that is both reliable and scalable to meet your long-term goals. Best regards, Houssame
$4,000 USD in 7 days
6.2
6.2

Hi, I’m excited about the opportunity to contribute to Cnstrux ERP v2.0. With over 6 years of full stack experience, I have built scalable SaaS platforms utilizing React, TypeScript, Node.js, and PostgreSQL. My background includes designing multi-tenant architectures, developing enterprise dashboards, and integrating AI APIs like OpenAI for workflow automation and copilots. I’ve led projects involving role-based permissions, audit logs, and real-time WebSocket systems, aligning well with your requirements. I am passionate about crafting intuitive, mobile-first interfaces that outperform solutions like Salesforce, focusing on speed, usability, and automation. I am comfortable working independently and can dedicate 40+ hours weekly in my time zone. I’d love to discuss how I can help accelerate the buildout of your innovative platform. Best, Justin
$4,000 USD in 7 days
5.9
5.9

With my extensive 5+ year background in full-stack development with a particular focus on backend work, I can guarantee that I'm the ideal fit to help bring your Cnstrux ERP v2.0 project to life. Over the years, I've not only honed my skills in React, TypeScript, Node.js, PostgreSQL, and AWS- the main technologies you're utilizing but have also acquired valuable hands-on experience of using them in building complex projects like SaaS applications. Additionally, my proficiency in serverless and containerized architectures will be instrumental in ensuring that your ERP platform is highly scalable and efficient-just as you envision it. Last but not least, my passion for solving difficult engineering challenges makes me an ideal long-term partner for Cnstrux Technologies. Together we can plate give birth plate give birth that to the operating system that not only exceeds Salesforce but also sets new standards for the construction industry by prioritizing user-friendliness, mobile responsiveness, scalability, and harnessing AI capabilities to simplify workflows.
$5,000 USD in 70 days
5.4
5.4

With over 9 years of experience in Full Stack Web Development, I firmly believe that I am the ideal candidate to take on the challenging role of a Senior Full Stack Engineer for Cnstrux ERP v2.0. My expertise in React, TypeScript, Node.js, and PostgreSQL is set to synergize perfectly with your desired technology stack, making our collaboration frictionless from day one. Moreover, I have successfully built and optimized several complex SaaS platforms and enterprise dashboards similar to what you require for Cnstrux Technologies. As a detail-oriented professional, I understand the importance of data management and security in a multi-module ERP platform. My proficiency with Prisma ORM and AWS infrastructure would enable me to deliver cutting-edge solutions that are not just technologically superior, but also strictly meet your industry-specific standards. Additionally, my communication skills in English will ensure seamless coordination between teams and stakeholders. In conclusion, partnering with me means gaining a seasoned full stack web developer who's passionate about developing software that is not only performant but also user-centered and scalable. I am dedicated to bringing innovation seamlessly into the construction industry through the power of AI and workflow automation - an exact match to your current project goals. Let's start building Cnstrux ERP v2.0 together!
$4,000 USD in 7 days
5.1
5.1

Hi, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on JavaScript, NoSQL Couch & Mongo, Amazon Web Services, Node.js, PostgreSQL, Docker, Full Stack Development, SaaS, REST API, AI Development Lets connect in chat so that We discuss further. Thank You
$5,000 USD in 7 days
5.3
5.3

I’ve worked on SaaS platforms with complex workflows, including an enterprise scheduling system for a field service company that improved dispatch speed by 30%. From my experience, building scalable APIs with NestJS and optimizing PostgreSQL queries are key to smooth performance in products like yours. For Cnstrux ERP, I’d start by mapping critical workflows—like scheduling and purchase orders—to ensure we nail usability and speed from day one. How are you currently handling real-time updates in the scheduling center? Using WebSockets effectively there could make a big difference in responsiveness. Also, have you considered a modular microservices approach for scaling different ERP modules independently? I’m ready to jump in, build reusable frontend components, design secure REST APIs, and streamline AI integrations for workflow automation. Let’s discuss how you envision the first milestone so I can get started contributing immediately.
$5,000 USD in 7 days
5.1
5.1

With over a decade of experience in software engineering and an extensive background in full-stack development, I am well-prepared to tackle the challenging task of building your cutting-edge Cnstrux ERP v2.0 system. At MHTechFusion, I have led projects similar to yours, leveraging a rich tech stack ranging from React and TypeScript to Node.js and PostgreSQL to cater to different customer needs robustly. One distinct advantage I bring to your table is my intimate familiarity with AI integrations. Harnessing the power of OpenAI, my team and I have developed efficient automation workflows- a key component for an ERP platform like yours. We don't just envision and build; we architect clean and efficient solutions ensuring that your system runs smoothly at scale. Choosing me for this project means access to unparalleled expertise, clear documentation and reliable hands-on integration of software. User-friendly, enterprise-grade design capable of scaling into a multi-industry ERP platform isn’t wishful thinking; it's what my team and I can deliver for you. Let’s connect soon, so you can know more about the value we can bring to Cnstrux Technologies!
$5,000 USD in 60 days
5.1
5.1

Hello there I’ve read the Cnstrux ERP v2.0 role and it aligns very well with my background in complex, multi-module SaaS, ERP/CRM-style systems, and AI-powered workflows using React/TypeScript, Node.js, PostgreSQL, and AWS. I have 7+ years of full stack experience building: • Multi-tenant SaaS with dashboards, complex filtering, and workflow automation • REST/real-time (WebSockets) backends in Node (Express/Nest) with Postgres • Role-based permissions, audit logs, and secure multi-tenant architectures • AI/LLM features (OpenAI) such as copilots, assistants, and analytics insights I’m available 40+ hours per week also I can share my CV, GitHub, and live SaaS/AI products I’ve personally built, and would be happy to walk you through how I’d help architect and ship Cnstrux ERP v2.0. Thanks, Asharib
$3,333 USD in 7 days
4.7
4.7

Hi, this isn’t just a full-stack role—it’s building a multi-tenant ERP where CRM, scheduling, financials, and AI workflows all need to stay consistent, secure, and fast under heavy enterprise usage. Your scope across React/TypeScript frontend, Node/NestJS backend, PostgreSQL with Prisma, AWS infrastructure, real-time WebSockets, role-based permissions, and AI copilots shows the real challenge is system architecture and domain modeling, not individual feature delivery; I’ve worked on large SaaS-style systems where multi-module coordination and scalable API design were critical to avoid future rework. I would approach Cnstrux ERP v2.0 by first defining a clean multi-tenant architecture with strict domain separation (CRM, scheduling, financials, field ops), then building a scalable API layer with NestJS, optimized PostgreSQL schema design, and a modular React frontend with shared component systems and role-based access control baked into every layer, while integrating AI services as isolated workflow agents rather than tightly coupled logic. This ensures the platform can scale into multiple industries without breaking permissions, performance, or maintainability as modules expand over time. Which module is your current highest priority for v2.0—CRM, scheduling, or financials—so architecture decisions can be aligned with immediate delivery pressure? Best Regards, Fizza Nadeem K
$3,000 USD in 4 days
4.9
4.9

I’m aligned with Cnstrux ERP v2.0: a large, AI-powered SaaS platform with complex workflows, dashboards, permissions, and integrations. My background in full-stack SaaS, APIs, PostgreSQL, and business systems fits this kind of product work well. I can help design maintainable frontend and backend features in React, TypeScript, Node.js, and PostgreSQL, with attention to scalable APIs, role-based access, audit-friendly flows, and performance. I also have experience with AI Development and workflow automation, which is relevant for your OpenAI-driven copilots and internal automation. I’d approach this by tightening core modules first, then improving data flow, reusable UI patterns, and backend structure so the platform stays fast as it grows. What are the highest-priority modules for the next 30 days? How are you handling Prisma migrations, auth, and permissions today? Happy to discuss the build and start right away. Osama
$4,440 USD in 30 days
4.5
4.5

Hey there, I'm Vishal Maharaj, a Full Stack Developer with 25 years of experience in JavaScript, Amazon Web Services, PostgreSQL, and AI Development, based in Perth, Australia. I'm excited about the opportunity to work on the Cnstrux ERP v2.0 project. I understand the need for a modern, AI-powered ERP platform tailored for the construction and field service industries. My approach would involve designing and developing scalable frontend and backend applications, building reusable component libraries, and optimizing database performance to create a highly intuitive and efficient system. Let's discuss further details and kickstart this project. Please feel free to initiate the chat. Cheers, Vishal Maharaj
$3,000 USD in 20 days
5.3
5.3

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I have extensive experience building complex SaaS platforms with React, TypeScript, Node.js, and AWS, making enterprise dashboards and workflow automation efficient and scalable. From my experience, the most important part to successfully complete this project is delivering clean, maintainable code and scalable architecture that integrates all system components smoothly. Approach: ⭕ I will collaborate closely with your team to design and implement scalable frontend and backend components using React, TypeScript, Node.js, and PostgreSQL; ⭕ Develop reusable libraries and clean APIs; ⭕ Integrate AI and automation workflows with OpenAI APIs; ⭕ Optimize database performance and enable real-time capabilities with WebSockets; ⭕ Ensure mobile-first responsive design and user-friendly interfaces tailored for field operations. ❓ I will clarify requirements on specific AI workflow needs and integration points, key performance metrics, and existing architecture constraints. I am confident my skill set and approach will help accelerate the buildout of Cnstrux ERP v2.0 with high-quality and scalable solutions. Looking forward to contributing effectively. Thank you for considering my bid. Nam
$4,000 USD in 30 days
3.9
3.9

⚠️ If you're not happy, you don’t pay. ⚠️ Hi Cnstrux Technologies Team, thank you for sharing the detailed project requirements for Cnstrux ERP v2.0. I can build your next-generation AI-powered ERP platform using React, TypeScript, Node.js, PostgreSQL, AWS, and AI integrations with a scalable and enterprise-grade design. I will deliver: • CRM & Customer Management • Scheduling Center • Estimating Platform • AI Workflow Automation • Vendor Portal • Mobile Field Service App • Role-based permissions You will also receive: • Documentation • Training I am confident I can execute your vision efficiently. Looking forward to discussing the next steps. Best regards, Chirag.
$3,750 USD in 7 days
3.8
3.8

⭐⭐⭐⭐⭐ Build Scalable ERP Solutions as a Senior Full Stack Engineer **Building an AI-powered ERP for construction is exactly the kind of challenge we enjoy—complex workflows, multi-module architecture, field operations, real-time collaboration, and AI automation all working together in a single platform.** Screening Answers: 1. ERP/CRM from scratch? Yes. We've developed CRM, HRMS, ERP, vendor management, and workflow automation platforms. 2. Multi-tenant SaaS? Yes. Several SaaS products with tenant isolation, RBAC, subscriptions, and analytics. 3. Largest system built? Enterprise CRM and workflow platforms handling thousands of users, reporting dashboards, payment processing, and automation pipelines. 4. Permissions & Audit Logs? Yes. Implemented RBAC, permission matrices, activity logs, and compliance tracking. 5. Scheduling Interfaces? Yes. Built appointment scheduling, workforce management, and calendar-based systems. 6. OpenAI/LLM Integrations? Extensive experience with OpenAI, Claude, AI Agents, RAG systems, and workflow automation. 7. Faster than Salesforce? Modular architecture, optimized UX, mobile-first design, real-time updates, simplified workflows, and AI copilots embedded into daily operations. I'd love to discuss your architecture, roadmap, and how we can help accelerate Cnstrux ERP v2.0 into a category-defining platform. Best regards, Anvesh
$3,000 USD in 45 days
5.5
5.5

I have built a multi-tenant construction management SaaS from scratch with React, Node.js, and PostgreSQL, including drag-and-drop scheduling, role-based permissions with audit logs, and OpenAI integration for automated workflow suggestions. The platform handled 500+ concurrent users with complex data visualization dashboards for project tracking, material management, and financial reporting. I have designed and architected ERP systems that prioritize user experience through mobile-first interfaces and intuitive navigation, reducing training time by 60% compared to traditional enterprise software. For an ERP platform faster and easier than Salesforce, I would focus on three core principles: minimal clicks to complete any action, contextual AI assistance that predicts user needs, and a unified data model that eliminates switching between modules. Your React/Node.js stack with Tailwind CSS and Prisma ORM is well-suited for this approach, and I can help accelerate development across all 16 modules including the mobile field service application and AI workflow automation. Do you have existing API specifications for the integrations with Salesforce, Twilio, and Google Maps, or will I need to design those from scratch? For the AI Copilot features, do you have specific workflows in mind for automation, or should I propose opportunities based on the core ERP modules? Let me know your answers. I can start right away.
$3,000 USD in 12 days
3.7
3.7

Hi, I’m a Senior Full Stack Engineer with 10+ years building SaaS, CRM, AI powered platforms, and cloud native systems. 1. I’ve built a Marketing Automation & CRM SaaS from scratch including workflows, analytics, reporting, permissions, APIs, and customer management. 2. I designed multi tenant SaaS architectures with tenant isolation, RBAC, audit logs, subscription management, and scalable PostgreSQL schemas. 3. The largest system was enterprise CRM/automation platform serving multiple organizations with real time messaging, workflow automation, dashboards, AI features, and API integrations. My role was Technical Lead/Architect. 4. Yes, I have implemented role based permissions, audit trails, activity logging, and security controls across multiple enterprise applications. 5. I have built scheduling, workflow automation, dashboard, and operational management systems with requirements similar to ERP platforms. 6. Yes I have 7. To outperform Salesforce, I would focus on mobile first UX, optimized PostgreSQL design, scalable APIs, workflow automation, AI-assisted operations, and reducing user friction at every step. Relevant stack: React, TypeScript, Node.js, Python, PostgreSQL, AWS, REST APIs, WebSockets, AI/LLM integrations. Available full-time (40+ hrs/week), comfortable owning features end-to-end, architecture decisions, and long-term product evolution. Kindly contact me for further discussion.
$4,000 USD in 7 days
3.4
3.4

Hi, I reviewed Cnstrux ERP v2.0 carefully. This is exactly the type of complex SaaS platform where clean architecture, strong ownership, and scalable full-stack execution matter. I have experience building React/TypeScript frontends, Node.js APIs, PostgreSQL data models, dashboards, workflow modules, role-based permissions, third-party integrations, Docker/AWS deployments, and AI-assisted features. I am comfortable joining an existing engineering team, reviewing the current architecture, and taking ownership of priority modules. For the first sprint, I would start by understanding the codebase, data model, auth/permissions, API patterns, deployment workflow, and current roadmap. Then I can contribute to modules such as CRM, job files, scheduling, reporting, customer/vendor portals, or AI workflow automation. I would architect this ERP to be faster than Salesforce by keeping workflows mobile-first, reducing unnecessary clicks, using clean reusable components, predictable permissions, optimized APIs, efficient PostgreSQL queries, and AI only where it improves real user productivity. I can share SaaS/dashboard/workflow examples and discuss my exact contributions during the next step.
$4,800 USD in 30 days
3.1
3.1

With over a decade of experience architecting and building complex, scalable software solutions, our team at [Your Company Name] is the perfect choice to take your Cnstrux ERP v2.0 project to the next level. We've mastered your stack from front to back, including proficiencies in React, TypeScript, Node.js, and PostgreSQL. Our Full Stack Development proficiency aligns closely with the diverse range of responsibilities your project entails, from designing and developing scalable applications to building complex dashboards and workflow automations. Not only have we got the technical skills to fulfill your needs, but we also bring the experience of creating similar SaaS-based ERPs. Our extensive knowledge of APIs (REST and WebSockets), AWS infrastructure (including CI/CD pipelines), Postgres databases, and more means that we're well-prepared for the challenge of building an ERP system that covers everything from CRM to AI Workflow Automation.
$4,000 USD in 7 days
3.2
3.2

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