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Build a Vertical SaaS Tax Workflow Platform (Phase 1 of 3) - Long-Term Partnership Opportunity **Project Overview** We are an established US accounting and tax firm building a vertical SaaS platform to serve other accounting firms in our industry. We have a three-phase roadmap and are starting with Phase 1, but we want a developer who understands the full vision so the foundation supports all three phases. We are looking for a long-term development partner across all three phases. This posting is for Phase 1. **The Full Three-Phase Vision** Phase 1 (this engagement): Build a tax workflow platform that replaces gettruss.io. See full feature requirements below. Please review [login to view URL] thoroughly before bidding. Phase 2 (future engagement): Build tax intake and preparation capabilities that take client data and produce Drake Tax backup files for direct import into Drake with the return pre-started. Phase 3 (future engagement): Layer in AI-powered firm intelligence connecting CRM, email, phone, and document storage so the platform has contextual knowledge of every client relationship. **Phase 1 Scope: Tax Workflow Platform** The platform must replicate the core functionality of gettruss.io. At a minimum, this includes: End-to-end tax workflow with four stages: Intake, Workpaper, Prep, and Delivery, all visible from a single dashboard. Intake module: zero-login client links for document collection, AI-powered intake checklists that build client-specific to-dos using prior-year data, bulk client engagement letter generation with merge fields, custom forms where answers drive downstream workflow. Document handling: clients can bulk upload tax documents. The system must automatically convert any format (JPG, PNG, HEIC, etc.) to PDF, auto-rotate to correct orientation, auto-rename files based on content (W-2, 1099, K-1, etc.), and auto-split multi-document PDFs into the correct individual files routed to the correct project tasks. Workpaper module: instant combined and bookmarked PDFs in tax-return order, in-browser annotation with tick marks, stamps, and notes, full audit trail of every action, AI-powered extraction and de-duplication, secure sharing. AI assistant: an in-platform AI side panel that can read uploaded client documents, prior tax returns, and client emails, answer tax research questions (with optional web research mode), analyze returns and flag unusual items or year-over-year changes, search across all documents by form, dollar amount, SSN, or pattern, draft client emails with full project context, and send drafts through connected email accounts. Prior-year backup imports: the ability to ingest a Drake backup file (and potentially other tax software backups) and automatically create contacts, entities, and projects in our platform based on the prior-year data. Delivery module: auto-built branded delivery packets, built-in e-signature for engagement letters, 8879s, and other tax authorization forms, integrated payment and invoicing at delivery, K-1 distribution with per-recipient tracking, encrypted secure file sharing via magic links. Communication: notifications inbox that triages uploads, tasks, comments, signatures, and invoices in one view, automated client nudges and reminders, internal team comments and collaboration. Mobile and desktop: a mobile scanner app that lets clients scan documents directly into project tasks, a desktop application for offline access. Integrations: must support direct import/export workflows with major US tax software including Drake, UltraTax, Lacerte, CCH Axcess, CCH ProSystem fx, ProSeries, ProConnect, ATX, and GoSystem. Multi-tenancy: firm-level workspaces with role-based permissions, multi-tenant architecture from day one, designed to scale to thousands of firm tenants. Architecture: API-first design so Phase 2 (intake-to-Drake-backup generation) and Phase 3 (firm intelligence) can extend the platform without rework. **Security and Compliance Requirements (Non-Negotiable)** This platform will store highly sensitive client information including Social Security numbers, tax returns, financial accounts, and bank information. The platform must be built to meet: SOC 2 Type II compliance standards (we will pursue the audit; you must build to those controls). AES-256 encryption at rest and TLS in transit for all data. Full audit logging of every action by every user. Role-based access controls and principle of least privilege. US-only data residency for all client data. IRS §7216 compliance for taxpayer data handling. Secure file sharing via expiring magic links without requiring client account creation. Bank-grade authentication including MFA for firm users. Regular automated security scanning and penetration test readiness. Demonstrated experience building SOC 2 compliant SaaS is required. If you have not built to SOC 2 controls before, please do not bid. **What We Are Looking For in a Developer or Team** Demonstrated experience building multi-tenant SaaS platforms (links to live products required). Demonstrated experience building to SOC 2 compliance. Experience building AI-integrated applications including document analysis, RAG, or LLM-powered features. Experience in US tax, accounting, or financial services industries strongly preferred. Strong written English communication. Ability to work on a milestone-based fixed-price contract. **Budget and Engagement** Budget: under $25K USD for Phase 1, fixed price. We are aware this is an aggressive budget for the scope described. We are open to bids from solo developers, small teams, or offshore agencies that can deliver to this budget. We are also open to phased milestone deliveries where we pay as features complete rather than one lump sum. If you believe the budget is unrealistic for the full scope, you may bid on a reduced MVP scope and explain what you would defer to a follow-up engagement. The right partner will have the opportunity to bid on Phase 2 and Phase 3 with separate scopes and budgets. **What to Include in Your Bid** Links to two or three SaaS platforms you have built, ideally in regulated industries. Confirmation of SOC 2 build experience with examples. Your recommended tech stack with reasoning. Estimated timeline for Phase 1. Proposed milestone breakdown. If you believe the budget requires a reduced MVP, explain what you would include and what you would defer. Any questions about scope or our existing tech stack (we use Zoho CRM, Zoho Mail, Zoom Phone, and Zoho WorkDrive as our backend systems).
Project ID: 40464429
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149 freelancers are bidding on average $16,033 USD for this job

Hi - Elias here from Miami. The core challenge in developing a SaaS tax workflow platform lies in managing the complexity of tax compliance, which varies significantly across jurisdictions. This requires a robust architecture that can accommodate varying rules and regulations while ensuring data security and integrity. It's crucial to focus on scalability from the outset. As user demand grows, the system must handle increased workloads without degrading performance. Common pitfalls include poorly designed data models that can't adapt to changing tax laws and inefficient API integrations that lead to latency. Operationally, we need to consider state management and permissions rigorously, especially when sensitive financial data is involved. Caching strategies will be vital in enhancing performance, particularly for frequently accessed tax calculations. My approach would involve a microservices architecture, allowing for modular development and easier maintenance. Each service can be independently scaled and deployed, mitigating risks associated with monolithic designs. The hardest part will be ensuring the tax logic is both flexible and robust, accommodating changes without extensive rework. What are the key jurisdictions you anticipate needing support for initially? Looking forward to discussing this further.
$15,000 USD in 35 days
7.8
7.8

With over a decade of experience in full-stack architecture and high-scale systems, I understand the critical need for a Vertical SaaS Tax Workflow Platform to revolutionize your accounting and tax firm's operations. Your ambitious project goal of developing a comprehensive tax workflow platform aligns perfectly with my background in scaling systems for over 1 million users and handling high-security FinTech solutions. In developing your SaaS platform, a strategic insight I would recommend is implementing an API-first design to ensure seamless integration and scalability for future phases of the project. Drawing from my success in building Telegram Mini Apps serving millions of users, I am confident in delivering a platform that meets your complex requirements and exceeds expectations. I invite you to take action and discuss the roadmap for your project further. Please feel free to reach out to me to explore how we can collaborate to bring your vision to life seamlessly and securely.
$16,000 USD in 75 days
7.5
7.5

A Warm Hello! We are readily available to start working on this project ! vertical SaaS ecosystem for accounting and tax firms is both ambitious and strategically compelling. We understand that Phase 1 is not simply a standalone workflow product, but the architectural foundation for a much larger intelligent tax operations platform that will evolve into automated tax preparation workflows and AI-powered firm intelligence. We specializes in building secure, scalable SaaS platforms for regulated industries, including finance, operations, and document-intensive workflows. We have experience architecting multi-tenant systems, AI-assisted automation platforms, and compliance-ready infrastructures designed for long-term extensibility. Recommended Phase 1 MVP Includes: • Multi-tenant SaaS architecture with firm-level workspaces • Role-based authentication and MFA • Intake → Workpaper → Prep → Delivery workflow dashboard • Secure client upload portal with magic links • AI-assisted document classification and renaming • PDF normalization, rotation, and document splitting • Workpaper assembly and bookmarked PDFs • Internal collaboration/comments/tasks • Notification center and workflow reminders • Audit logging and activity tracking • Zoho CRM / Zoho Mail integration layer • API-first backend architecture • SOC 2 aligned infrastructure and security controls • Foundational AI assistant with document Q&A and semantic search We will look forward for your reply. Best regards, Ana
$20,000 USD in 70 days
8.1
8.1

Hi, I will architect Phase 1 as a multi-tenant tax workflow platform — Intake, Workpaper, Prep, and Delivery modules — with SOC 2-ready controls, AES-256 encryption, US-only data residency, and an API-first foundation that supports Phases 2 and 3 without rework. For the tech stack, I recommend React frontend, Node.js/Python backend, PostgreSQL with row-level security for tenant isolation, and AWS GovCloud for US-only residency. Document processing — auto-conversion, rotation, AI-based renaming and splitting — will use a pipeline combining Textract and a fine-tuned classification model so W-2s, 1099s, and K-1s route accurately at scale. Send me a message and we can go over the details. Best regards, Kamran
$11,340 USD in 30 days
6.5
6.5

Hello! This is James from Hollywood, and I’m excited about the opportunity to work on your SaaS Tax Workflow Platform. I've carefully read your project description and believe I can deliver a solution that meets your needs, especially with my 15 years of experience in web development and SaaS platforms. To ensure I fully understand your vision, could you please clarify the following questions? 1. What specific tax compliance features are you looking to prioritize in Phase 1? 2. Are there particular APIs or third-party integrations you have in mind? 3. Can you share your timeline expectations for each phase of the project? I have a strong background in building scalable software, including custom APIs, security measures, and AI integrations. I've worked on similar projects, such as developing a tax compliance dashboard for a financial services startup and an automated workflow platform for a small e-commerce site. My approach involves breaking the project into clear milestones, ensuring each phase is robust and aligned with your business goals. I’m committed to clear communication and delivering production-ready code without shortcuts. I look forward to the possibility of collaborating with you on this long-term partnership. Let’s chat about how we can make your vision a reality!
$15,000 USD in 35 days
5.7
5.7

Hello, Having thoroughly reviewed your project for developing a comprehensive SaaS Tax Workflow Platform, we're excited about the opportunity to partner with you. Your vision for a multi-phase, AI-enhanced platform aligns perfectly with our extensive experience in crafting intelligent, scalable, and secure applications. We've previously developed multi-tenant SaaS platforms with AI integration, much like your proposed system. Our deep expertise in building SOC 2 compliant platforms ensures that your platform will meet all security and compliance requirements, including AES-256 encryption and role-based access controls. With over eight years of experience and a proven track record of top-rated results, we excel in AI-first product development, automation, and web platforms. Our skills in n8n workflows, LLM integration, and secure endpoints using FastAPI and Vector DBs will be instrumental in creating a robust, end-to-end tax workflow system. We invite you to message us with more details. We are eager to provide a detailed, tailored proposal within 24 hours, addressing your specific needs and showcasing our recommended tech stack and milestone breakdown. Looking forward to the opportunity to collaborate. Best regards, Puru Gupta
$20,000 USD in 50 days
5.0
5.0

I understand you need a developer to build the core tax workflow functionality for your vertical SaaS platform, specifically Phase 1, with an eye on the full three-phase roadmap for accounting firms. I recently developed a similar core workflow engine for a legal tech startup, streamlining their case management process by 30%. My approach for Phase 1 will involve building a modular backend using Python/Django and PostgreSQL, with a RESTful API for future frontend integration. This will include user authentication, task assignment, document management hooks, and status tracking, all designed for extensibility to support future phases of client onboarding and reporting. Given the long-term vision, how will client data from this initial tax workflow phase integrate with the planned client onboarding and reporting modules in Phases 2 and 3? Ready to start as soon as you confirm scope.
$17,148 USD in 21 days
5.2
5.2

Hi there, Building a robust, secure Vertical SaaS Tax Workflow Platform comes with the challenge of ensuring seamless integration and compliance, especially when handling sensitive client information. This can lead to inefficiencies and security vulnerabilities without the right expertise. With my extensive experience in creating multi-tenant SaaS platforms and building towards SOC 2 compliance, I will ensure your project's foundation is solid across all phases, starting with Phase 1. Here are my questions: 1) Could you specify any preferred tech stack or are you open to recommendations? 2) Are there existing integrations that must be maintained or reconfigured with your current Zoho systems? Let’s discuss your project now!
$10,000 USD in 50 days
5.1
5.1

⭐⭐⭐⭐⭐ Build a Vertical SaaS Tax Workflow Platform for Accounting Firms ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you are looking for a developer to build a tax workflow platform. You don't need to look any further; Zohaib is here to help you! My team has successfully completed over 50 similar projects focused on SaaS development. I will ensure the platform meets all specifications while staying within your budget. ➡️ Why Me? I can easily build your tax workflow platform as I have 5 years of experience in developing SaaS applications, specializing in tax software and workflow solutions. My expertise includes API integration, document handling, and user interface design. I also have a strong grip on security compliance, ensuring your platform meets SOC 2 standards. ➡️ Let's have a quick chat to discuss your project in detail. I can provide samples of my previous work and show you how we can achieve your goals effectively. ➡️ Skills & Experience: ✅ SaaS Development ✅ API Integration ✅ Document Management ✅ User Interface Design ✅ Security Compliance ✅ Multi-Tenant Architecture ✅ Workflow Automation ✅ Data Encryption ✅ AI Integration ✅ Tax Software Knowledge ✅ Project Management ✅ Communication Skills Waiting for your response! Best Regards, Zohaib
$12,000 USD in 2 days
5.2
5.2

I understand you're looking to build a robust vertical SaaS tax workflow platform, and I have extensive experience developing similar, scalable applications for regulated industries, including a recent project that involved integrating complex compliance logic and automated reporting for a financial services firm. My approach for Phase 1 will focus on establishing a solid, modular foundation that readily accommodates your full three-phase vision. Technically, I propose utilizing a modern, cloud-native stack. We'll leverage a microservices architecture built with Node.js (or Python, depending on your preference) for backend services, ensuring scalability and independent deployment. For the frontend, React with TypeScript will provide a dynamic and maintainable user interface. We'll implement a robust PostgreSQL database for data persistence, employing efficient indexing and query optimization. CI/CD pipelines with GitHub Actions and Docker will ensure rapid, reliable deployments. My initial plan involves defining core entities (clients, tax years, tasks), building secure authentication and authorization, and developing the foundational workflow engine with state management. To ensure alignment and address potential architectural nuances early on, I'd like to ask: What are your immediate priorities for the core workflow engine's flexibility, and how do you envision user roles and permissions evolving across the subsequent phases? I'm confident my technical expertise and strategic approach can deliver a high-quality Phase 1 that sets you up for long-term success. Let's schedule a brief call to discuss your specific requirements in more detail.
$17,299 USD in 21 days
4.6
4.6

Hi, this is an ambitious but very well framed Phase 1 and it fits the kind of vertical SaaS I build. I have led multi tenant, SOC 2 oriented platforms in financial and compliance contexts, including document heavy workflows, full audit trails, role based access, US only residency and AES 256 plus TLS everywhere. I have also shipped AI features around document analysis, RAG search, anomaly detection and email drafting, so the in app assistant and intake automation are very natural extensions of my past work.
$15,000 USD in 7 days
4.2
4.2

hi, i have reviewed the details of your project. we have experience building secure multi tenant saas platforms, api first systems, and ai driven document workflows, and we can support you in building phase 1 of this platform. we can design a solid foundation with a clean api architecture so future phases like drake integration and ai intelligence can be added without rework. for phase 1, we would focus on building the core workflow dashboard, intake system, document automation pipeline, workpaper module, secure delivery flow, and basic ai assistant integration with a scalable backend structure built for compliance and multi tenancy. we have worked on systems involving sensitive data handling, encryption standards, and structured workflow automation, and we can align the build with soc 2 style requirements including audit logs, mfa, and secure access control. can we schedule a quick meeting to discuss the project in detail. it will help us understand your current stack and expectations better and give you a clear plan, timeline, and milestone breakdown. i will also share our portfolio during the chat. mughira
$15,000 USD in 7 days
3.8
3.8

Hey there, Passionate about taking on your SaaS Tax Workflow Platform Development project. I'm Vishal Maharaj, a seasoned Web Developer with 25 years of experience in Perth, Australia. I understand the need for a comprehensive tax workflow platform that integrates various stages seamlessly. My approach involves building a secure, AI-powered platform with multi-tenancy support and robust integrations for a streamlined workflow. Let's discuss further details and kickstart this project. Feel free to initiate the chat. Cheers, Vishal Maharaj
$15,000 USD in 60 days
2.6
2.6

Hi, I’ve reviewed the Phase 1 requirements and understand this is much more than a workflow application it is the foundation of a multi-tenant tax SaaS platform with future AI and tax-preparation automation capabilities. My approach would be API-first from day one, ensuring that workflow management, document processing, AI services, integrations, and future Drake backup generation can be added without major rework. Key areas I can help with: • Multi-tenant SaaS architecture • Secure document management and audit logging • AI-powered document workflows and search • REST/GraphQL API development • Role-based permissions and compliance-focused design • Integration planning for tax software and Zoho ecosystem For a project of this scope, I recommend starting with a technical discovery and architecture phase to define the MVP, milestones, and compliance requirements before implementation. I would be happy to discuss the roadmap, preferred tech stack, and how Phase 1 can be structured to support Phases 2 and 3 efficiently. Best regards, SH.
$15,000 USD in 7 days
2.7
2.7

Hey! With a reputation for transforming ideas into high-performing, reliable digital products, I genuinely believe I'm an excellent fit for your project. The depth of my experience in web and mobile app development, skill with SaaS platforms, and business automation solutions can significantly contribute to the success of this vertical Tax Workflow Platform. Over 5 years, 80+ businesses have entrusted me with their projects. Each time, I've not only built apps but helped businesses reach their goals, just as you're aiming for a full three-phase product envision. My Full-Stack Development expertise (MERN Stack inclusive), proficiency in AI-powered systems (essential for Phase 3), and API-first design approach make me well-suited to extend and fortify your product while ensuring long-term success. On top of my technical skills, my client-oriented approach centered around clear communication, on-time delivery, and aiming to build solutions that will tangibly grow your business aligns well with your values. Believing that it's not just about completing the project but actually building something that moves your business forward is parallel to our shared objectives. I am ready to leverage my experience and skills for your project's success now and throughout the entire three-phase journey.
$15,000 USD in 15 days
2.2
2.2

Hi, I’m Jitendra from Invoke Tech. I’ve recently worked on similar multi-tenant SaaS platforms involving document-heavy workflows, AI-assisted processing (RAG pipelines), secure role-based access systems, and API-first architectures designed for future scaling and integrations. For this Phase 1 build, I would propose a modular SaaS architecture (Node.js/NestJS or Django backend + PostgreSQL + S3-compatible storage + React frontend) with strict multi-tenancy from day one. Core modules like Intake, Workpaper, Delivery, and AI Assistant can be built as independent services so future Phase 2/3 (Drake integration + AI firm intelligence) plug in without refactoring. For AI, I would implement a secure RAG layer with document parsing, indexing, and controlled LLM access. Security would be designed around SOC 2 controls from the start—RBAC, audit logs, encryption (AES-256/TLS), MFA, and isolated tenant data boundaries with US-region deployment (AWS/Azure). I also have experience implementing document workflows with OCR, file classification, and structured extraction similar to tax/financial use cases. For Phase 1, I’d recommend an MVP-first approach under budget: Intake + Document Processing + Workpaper + Basic AI Assistant + Multi-tenant core + Secure Delivery module. Advanced Drake backup ingestion and deep AI intelligence layers can be planned for Phase 2. THANK S INVOKE TECH
$15,000 USD in 35 days
4.6
4.6

I have read through your full three phase vision carefully and I understand the foundation built in Phase 1 must support everything that follows. I recommend React frontend, Node Express backend, PostgreSQL with row level tenant isolation, and AWS US regions for data residency. This stack supports your API first requirement and integrates cleanly with Zoho CRM, Mail, and WorkDrive. I have built multi tenant SaaS platforms in regulated industries and understand SOC 2 controls including AES 256 encryption, full audit logging, role based access, MFA, and expiring magic links. I will build to those controls from day one. For Phase 1 within the $25K budget I propose a milestone based MVP covering the core workflow dashboard, intake module with zero login client links, document handling with auto convert and auto rename, workpaper module, delivery module with e-signature, and the AI side panel with document reading and email drafting. Timeline estimate is 16 to 20 weeks across four paid milestones. Please share access to your Zoho stack and I can begin architecture planning immediately. Muthu
$15,000 USD in 20 days
0.4
0.4

Hi , You need an expert in SaaS, API Development, Tax Compliance, Web Development, AI Development and Security, and I have a tailor-made solution ready for you. Your project brief instantly reminded me of a recent client who faced similar challenges, and I know exactly how to execute this flawlessly for your specific needs. To ensure we hit the ground running, I have three quick questions: Are there any additional technical details or constraints not mentioned in the brief? What is the primary hurdle currently blocking your progress on this? What is your strict timeline for completion? Why trust me with your project? The Record: 250+ Projects. 6+ Years. 100+ consecutive 5-star reviews. The Standard: Zero misses. I don’t just finish the job; I guarantee flawless execution. The Availability: Full-time freelancer, online 9 AM - 9 PM EST. My biggest "heavy-hitter" projects are kept off my public portfolio to protect client confidentiality. Click 'CHAT', and I’ll immediately send over relevant, private samples so you can see the standard of my work firsthand. Best regards, Salikeen Studio
$10,000 USD in 5 days
0.0
0.0

Hi, I came across your project "SaaS Tax Workflow Platform Development" and I'm confident I can help you with it. About Me: I'm a full stack developer and agency owner with over 8+ years of experience in API Development, Web Development, SaaS. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak
$15,000 USD in 7 days
0.0
0.0

Building a Vertical SaaS Tax Workflow Platform sounds like an exciting challenge. I see you're looking for someone experienced in web development, tax compliance, and API development for this phase of a long-term partnership. With around 10 years of experience, I’m confident I can help you create a solution that not only meets your security needs but also streamlines tax workflows effectively. Your goal of establishing a solid foundation for future phases is something I resonate with. Some similar things I've built: a regional booking platform for a tutoring company, an internal CRM for a property agency, and a React Native field-reporting app. Let’s discuss how we can bring your vision to life. Could you please clarify the following questions to help me better understand the project? Q1: What specific tax compliance regulations should the platform adhere to in your target region? Q2: Are there any specific integrations you foresee needing with existing systems or third-party services? Q3: What features do you envision for Phase 1, and how do you see them evolving in future phases?
$15,000 USD in 99 days
0.0
0.0

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