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Seneca Safety Partners is looking for an experienced software development team or agency to design and build Sentinel from the ground up — a greenfield SaaS product that fills a clear, underserved market gap in contractor safety. The Problem Field contractors currently run Job Hazard Analysis (JHA) and lone-worker safety monitoring as two completely separate, disconnected tools — neither one tied to the actual work order that drives the job. Safety compliance suffers because workers forget to open yet another app. The Solution Sentinel is a single integrated plug-in that attaches directly to the work order management / CMMS system the company already uses. Hazard analysis and worker safety now happen inside the job itself. Required Features • Digital JHA Workflow – mobile-friendly creation & completion, review/approval process, full audit trail • Lone-Worker Monitoring – check-in timers, SOS/duress alerts, man-down detection, GPS/location tracking • Multi-Channel Alerting – tiered escalation across SMS, email, push, etc. • Supervisor/Admin Dashboard – audit-ready records, reporting, and compliance oversight • Integration Framework – clean, extensible layer for major work order and CMMS platforms Project Highlights • True greenfield build (web + responsive/mobile-first) • Strong product-market fit with immediate pilot customers ready to test • Founder has deep domain expertise helping contractors with ISNetworld, Avetta, Veriforce prequalification and safety programs We will share the full detailed Product & Technical Specification after an initial conversation. If you have solid experience building secure B2B SaaS workflow tools, real-time features, third-party integrations, and compliance-focused applications, please reply with: • Brief overview of your relevant experience • Suggested tech stack & high-level approach • Rough timeline and budget range for MVP
Project ID: 40596766
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351 freelancers are bidding on average $2,297 USD for this job

Hi Seneca Safety Partners, We understand you're looking to develop Sentinel, a SaaS solution that integrates Job Hazard Analysis and lone-worker safety monitoring into a single plug-in for work order management systems, addressing a significant gap in contractor safety. With our 17 years of experience in web and mobile development, including projects like a learning platform website and a music voting mobile app, we believe we can deliver a robust and secure B2B SaaS workflow tool. Our tech stack for this project could include PHP for the backend, JavaScript frameworks like React for the frontend, and integration with major work order and CMMS platforms via APIs. One question: are there any specific third-party integrations or compliance standards that Sentinel needs to adhere to from the outset? Feel free to message us to discuss the details! — Webbook Studio
$1,550 USD in 30 days
9.2
9.2

Hi — Elias here from Miami. I understand you're looking to develop a safety SaaS solution with a focus on reliability and user experience. Ensuring that your application meets safety standards while being user-friendly is vital for your business. What usually matters most here is how well the system scales under varying loads and integrates with existing processes. A common issue in systems like this is managing user permissions and workflows effectively, as they can get complex quickly. The tricky part is usually ensuring that the application is both secure and easy to maintain as new features are added. My approach would involve creating a modular architecture that allows for future expansion and easy integration with third-party services. This ensures stability and maintainability, which are crucial for a SaaS product's success. I have experience working on similar safety and compliance platforms, focusing on a seamless user experience while keeping technical debt in check. A few questions to better understand the scope: Q1 – What specific user roles and permissions do you envision in the system? Q2 – Are there any existing integrations or third-party services we should consider? Q3 – What are your scaling expectations as the user base grows? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$2,500 USD in 10 days
8.8
8.8

Hello, We understand Seneca Safety Partners is looking for a team to build Sentinel, a critical greenfield SaaS solution integrating Job Hazard Analysis and lone-worker safety directly into existing CMMS platforms. This innovative approach promises to significantly enhance contractor safety compliance by streamlining workflows and eliminating disconnected tools. We are keen to leverage our expertise in secure B2B SaaS, real-time systems, and robust integration frameworks to bring Sentinel to life. I’m Waqas from Eclairios, a professional software engineer with over 7 years of experience in app and web development. I have successfully completed 128 projects, earning a 5.0 rating from satisfied clients. I specialize in mobile apps (Android, iOS, Flutter), website development, custom APIs, and backend solutions. My goal is to deliver high-quality, scalable solutions that meet your business needs. Why hire me? ★ 100+ Projects Completed with 5-star rating. ★ 3 months of free post-launch support ★ Expertise in advanced technologies and systems Let’s connect and discuss how I can help you with your project. Best regards, Waqas
$1,744 USD in 7 days
8.4
8.4

Hello, Thank you for considering my team, Miracles Software, for your Sentinel project. We understand that you need a seasoned company with strong capabilities to build a ground-up SaaS platform as innovative and critical as Sentinel. With over a decade of experience in web and software development, we have sharpened our skills in creating secure B2B SaaS workflow tools, real-time features, third-party integrations, and compliance-focused applications- all foundational to what you're looking for in Sentinel. Your immediate pilot customers awaiting testing demonstrates how your vision perfectly aligns with market needs, mirroring our own philosophy at Miracles Software. We are known for producing impactful digital solutions that not only meet but exceed customer expectations by providing them with high-functioning, reliable products. To give you a brief overview of our suggested tech stack and high-level approach; we'd utilize PHP for the backend to handle the core business logic, Android for the mobile-first solution, integrating neatly with your existing work order management/CMMS systems. For location tracking and multi-channel alerting, we can employ GPS mechanisms and leverage SMS/email/push accordingly. Last but certainly not least is our Founder's deep domain expertise. He has spent years helping contractors like Seneca Safety Partners navigate complex safety programs - something invaluable when it comes to dealing with compl Thanks!
$1,600 USD in 12 days
8.6
8.6

Hello, I'm Omer, and I empathize with the challenges facing contractors when it comes to job safety. My extensive experience building large scale, compliant, and secure B2B SaaS workflow tools makes me a great fit for the Sentinel project. To begin with, my knowledge of developing mobile applications utilizing Flutter (which provides exceptional cross-platform compatibility) combined with a robust backend using REST APIs would set a solid technological foundation for Sentinel. Given that the app requires strong real-time features and seamless third-party integrations for efficient hazard analysis and worker safety monitoring, my familiarity with Firebase's clean, reliable API and cloud services should prove beneficial. Moreover, my expertise in employing location services maps and databases such as MySQL or SQLite particularly aligns with your requirement of GPS/location tracking and data audits. Creating Sentinel is not just about coding, it’s about combining technology with a deep understanding of contractor safety protocols. As the founder, I have years of experience assisting contractors navigate safety programs and prequalification standards such as ISNetworld and Avetta; this unique perspective will significantly contribute to developing a product that truly meets industry demands. Let’s collaborate on your safety innovation!
$6,500 USD in 30 days
8.9
8.9

Interesting project, I will build Sentinel as a mobile-first SaaS platform where the digital JHA workflow and lone-worker monitoring (check-in timers, SOS alerts, GPS tracking) all live inside the work order itself, eliminating the "open another app" problem your contractors face today. On a recent B2B safety workflow build, tying alerts directly to the parent record instead of a separate module cut missed check-ins significantly. I will architect Sentinel the same way. Questions: 1) Which CMMS platforms (e.g., Fiix, UpKeep, eMaint) do your pilot customers use, so I can scope the integration layer for MVP? 2) For man-down detection, are you targeting native mobile sensors only, or also wearable hardware integrations? Looking forward to potentially working together. Thanks, Kamran
$1,664 USD in 25 days
8.7
8.7

Hi, I reviewed the Sentinel brief and the main requirement is to build a greenfield SaaS that unifies JHA and lone-worker safety inside the work order. I will deliver a mobile-first SaaS/web solution with a Digital JHA Workflow, Lone-Worker Monitoring, Multi-Channel Alerting, and an admin dashboard, all connected through a clean Integration Framework. The system will be built with a scalable Software Architecture to plug into major work order/CMMS platforms, with GPS/location, check-in timers, SOS alerts, audit trails, and secure, audit-ready records. Expect quality, responsive support, and clean, manageable code with an easy admin experience and reliable releases. Let’s discuss here now.
$1,500 USD in 30 days
8.5
8.5

Hi, I understand you need a secure B2B SaaS platform like Sentinel that combines digital JHA workflows, lone-worker safety monitoring, real-time alerts, and CMMS integrations into one seamless solution, and I am confident I can help you build it from the ground up. I can develop a complete greenfield SaaS product with a mobile-first interface, digital JHA creation and approval workflows, audit trails, GPS-based worker monitoring, SOS/man-down alerts, and a powerful admin dashboard for compliance reporting. The system will be designed with scalability, security, and future integrations in mind. The project will include responsive web and mobile-friendly development, secure backend architecture, API development, testing, deployment support, and full source code delivery. I can also help define the MVP roadmap and prepare the product for pilot customers. Please check out my profile to review my past projects and portfolio: https://www.freelancer.com/u/Hammadhassan21 I am available to start immediately. Let’s discuss your detailed product specification, MVP scope, timeline, and budget range to get started. Thanks.
$1,500 USD in 14 days
7.9
7.9

Hello, I can help with your "Sentinel: Safety SaaS Solution Development" project. I develop clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, mobile app development, android, software architecture, software development, web development, api development, saas, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. I provide clean commits and clear documentation. Could 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.
$1,800 USD in 36 days
8.0
8.0

Hi, I've built 20+ B2B SaaS platforms with mobile workflows, real-time alerts, and third-party integrations, including compliance-focused safety tools for contractors, so this fits directly in my experience. I'll design a single-page web app with a mobile-first React frontend, a Laravel backend for secure user management, and a PostgreSQL database storing work orders, JHAs, and lone-worker records with full audit trails. The mobile app will sync GPS, check-ins, and SOS events in real time via a dedicated API, while the supervisor dashboard generates compliance reports and handles tiered escalation through SMS and email. I'll implement OAuth2 for secure third-party integrations with existing CMMS platforms and add rate limiting to ensure reliability during peak usage. I can review the detailed spec and begin immediately.
$1,500 USD in 30 days
7.8
7.8

My Specialization: SaaS Development, Laravel, React, Node.js, PostgreSQL, Real-Time Applications, Mobile-First Development, API Integrations, Cloud Architecture I will architect and develop Sentinel as a secure, scalable SaaS platform with real-time safety monitoring, workflow automation, CMMS integrations, and an extensible foundation for future enterprise growth. Questions: 1. Which CMMS or work order platforms should be supported during the initial MVP release? 2. Will Sentinel initially be delivered as a responsive web application only, or should native Android and iOS applications be included? Do you have specific compliance requirements such as OSHA, ISO 45001, SOC 2, HIPAA, or regional privacy regulations that should influence the system architecture? 3. Do you already have wireframes or detailed product specifications, or would discovery and UI/UX design be included as the first project phase? Let's discuss and go ahead. I am available immediately. Once you inbox me, I will also show you my related work samples. Awaiting your response. Regards Kuldeepak
$3,000 USD in 15 days
7.6
7.6

Sentinel needs a secure SaaS architecture connecting mobile-first JHA workflows with lone-worker monitoring and CMMS integrations. I’ll build modular APIs with Laravel, React, PostgreSQL, and real-time WebSockets for alerts, GPS, SOS, audit trails, and scalable integrations. I’ve developed workflow-driven platforms with role-based dashboards, automated notifications, and third-party API integrations. Estimated timeline: 10–21 days Budget: $2500 Let's discuss and get started. Ajharul
$2,500 USD in 7 days
7.5
7.5

Hello, I am very interested in the Sentinel: Safety SaaS Solution Development project. I understand the need for an integrated solution like Sentinel to streamline contractor safety processes and compliance. With my expertise in Mobile App Development, PHP, Android, Software Development, Web Development, API Development, and Software Architecture, I am confident in my ability to design and build this greenfield SaaS product effectively. I have experience in developing secure B2B SaaS workflow tools, real-time features, third-party integrations, and compliance-focused applications. My approach will involve creating a digital JHA workflow, lone-worker monitoring features, multi-channel alerting, supervisor/admin dashboard, and a robust integration framework. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I would love to discuss this project further and share insights on how I can contribute to the success of Sentinel. Best regards, Warda Haider
$1,500 USD in 12 days
7.0
7.0

Hello! As per your project post, you are looking to build Sentinel Greenfield SaaS platform that unifies digital Job Hazard Analysis, lone worker safety monitoring, and work order management into a single integrated solution. The platform will help contractors improve safety compliance by embedding hazard assessments, real time worker monitoring, GPS tracking, and automated alerts directly within existing CMMS and work order systems through a scalable web and mobile first architecture. My approach would begin with a detailed discovery and technical planning phase, followed by designing a scalable SaaS architecture, developing the digital JHA workflow, implementing lone worker monitoring with GPS, SOS, and man down detection, building supervisor and admin dashboards, integrating multi channel notifications, and creating a flexible integration framework for major CMMS platforms. I specialize in React.js, Node.js, Laravel, PostgreSQL, REST APIs, SaaS platform development, workflow automation, GPS and geolocation services, cloud deployment, and enterprise system integrations. My focus will be on delivering a secure, scalable, and compliance ready safety platform with seamless integrations, intuitive workflows, and reliable real time monitoring. Let's connect to discuss your requirements and build a secure, production ready contractor safety SaaS platform. Best regards, Nikita Gupta
$1,500 USD in 45 days
7.0
7.0

Hello!, This is James from Hollywood... I read your Sentinel: Safety SaaS Solution Development post carefully, and I understand you’re looking for a serious team that can design a reliable safety-focused SaaS platform, not just “build screens.” My background is 15+ years in full-stack development, software architecture, PHP, API development, Android, and SaaS products, so I’m confident I can help turn this into a stable, practical system that’s easy to maintain and scale. My approach would be: 1. Review the workflow, user roles, and safety requirements 2. Define the architecture, API structure, and data model 3. Build the web platform with clean admin/user flows 4. Add mobile support where needed, with testing and deployment 5. Final QA, security checks, and handoff with documentation Relevant work I’ve handled includes: - SaaS ops dashboard for a logistics team - Android field service app with API sync - PHP-based client portal for a compliance workflow - Internal safety reporting tool with role-based access Could you please clarify the following questions to help me better understand the project? 1. What are the core user roles and the most important actions each role must perform? 2. Do you already have wireframes, branding, or must the UI/UX be created from scratch? 3. Should this start as a web app only, or do you want Android support in the first phase too? If you want, I can help shape the scope so you get the right MVP first, then expand it the smart way.
$2,500 USD in 10 days
7.1
7.1

Hi, I reviewed your project and would be happy to help. I have relevant experience, communicate clearly, and focus on delivering high-quality work on time. I have similar exp already. I can start immediately and will keep you updated throughout the project. Please share any additional requirements, and we can discuss the best approach. Looking forward to working with you. Best regards, Ivane C
$2,250 USD in 7 days
7.2
7.2

The part that makes or breaks Sentinel is the escalation loop, and your spec already nails why: a missed check-in or man-down can't be judged on the worker's device. A phone that dies or loses signal mid-shift is exactly when the alert matters most, so the countdown and missed-check-in detection have to live server-side, with the device only reporting check-ins against it. Android makes this harder than it looks. Doze and per-OEM battery killers will suspend a background timer, so a foreground service reporting to a server-authoritative scheduler is the only shape that holds up. Same reason push alone isn't enough: FCM/APNs are best-effort, so SMS (Twilio-class) failover with acknowledgment tracking is the floor, not a later phase. On the WOMS side I'd build the generic REST + webhook connector with field mapping and prove it against one real system, polling where webhooks don't exist, instead of chasing pre-integrations. Backend I lean PHP/Python (I've built integration-heavy tooling in both), API-first, with an append-only audit log from day one so records stay audit-ready. Two calls worth making early: native vs React Native for the monitoring app, and whether 911/monitoring-center is in the MVP or it's supervisor-only escalation. Both change the mobile build. Happy to walk through how I'd de-risk the alerting on a quick call.
$3,000 USD in 15 days
7.2
7.2

Hi there, I am excited about the opportunity to collaborate on the development of Sentinel, a cutting-edge SaaS solution to enhance contractor safety. With over a decade of experience in building secure B2B SaaS platforms and workflow tools, my team and I are well-equipped to bring your vision to life. We understand the critical need for integrating JHA and lone-worker safety monitoring directly into existing work order systems. Our approach will focus on creating a seamless, user-friendly solution that ensures safety compliance without disrupting current workflows. By leveraging technologies such as PHP, along with robust mobile app frameworks for Android, we will deliver a comprehensive, responsive platform. Our proposed tech stack includes PHP for backend development, ensuring scalability and security, alongside modern front-end technologies for an intuitive user interface. For real-time features and multi-channel alerting, we will integrate reliable APIs and scalable cloud services, ensuring prompt and efficient communication. We are committed to delivering a high-quality MVP that is ready for pilot testing, leveraging our expertise in third-party integrations and compliance-focused applications. Our team is eager to contribute to Sentinel's success and provide a solution that meets your exact needs. Looking forward to discussing how we can turn Sentinel into a market-leading product. Best Regards,
$2,250 USD in 20 days
6.9
6.9

Hi, I'm interested in your project "Sentinel: Safety SaaS Solution Development". 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.
$1,500 USD in 7 days
6.7
6.7

As a seasoned full-stack developer with significant experience across a wide range of technologies including PHP and SaaS, I'm confident in my ability to deliver an exceptional solution tailored specifically to Seneca Safety Partners' needs. My expertise in web and mobile development combined with my versatile API integration skills make me well-suited for this project. Moreover, my familiarity with real-time features and compliance-focused applications aligns perfectly with Sentinel's prime focus – the seamless merger of job hazard analysis and lone-worker safety monitoring into a singular, inclusive tool for reliable safety compliance. Having been involved in building secure B2B SaaS workflow tools throughout my career, I have encountered similar challenges faced by field contractors and successfully implemented effective solutions that have taken performance and maintainability into account. Notably, I take great pride in ensuring a clean architecture that guarantees smooth future developments.
$1,500 USD in 7 days
7.1
7.1

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