Full Stack Developer for B2B SaaS

@webbookstudio

Hello, there. We can create a robust B2B SaaS solution with React, TypeScript, and AI integration. We have years of experience in website design, graphic design and logo design (photoshop, illustrator), banner design, brochure design, 3d design(Blender, 3d-max, WebGL). Please, review our experience here - https://www.freelancer.com/u/webbookstudio. We will be glad to chat with You and discuss your task. Waiting for Your reply! Best regards.

@n2rtechnologies

Hello, I am excited about the opportunity to collaborate on the ongoing development of your B2B SaaS product. My experience in building scalable applications aligns perfectly with your needs. I can contribute to enhancing user features, optimizing performance, and ensuring a seamless user experience. Understanding the complexities involved in B2B environments, I am committed to delivering robust solutions that meet your clients' expectations. I can assist in implementing the necessary integrations and improving the overall architecture to support your growth. Let’s discuss how I can help you achieve your project goals effectively. Regards, Nurul Hasan

@AwaisChaudhry

Hello, I’m Muhammad Awais, a full stack developer ready to help grow your B2B SaaS in the US market. I understand you already have a solid foundation and a modular, multi-tenant system. I will work across frontend and backend, respect existing architecture, and push features that improve performance, UX, and code quality while aligning with your SaaS business logic, roles, and permissions. I will design API-first features in React + TypeScript, with Tailwind for UI, and ensure smooth multi-tenant behavior. I have hands-on AI experience in real products and will integrate AI via reliable APIs, mindful of cost and production impact. I’ll focus on ownership and long‑term collaboration, not quick one‑offs, and will deliver incremental value with clear milestones. What is your top priority for the next release, and are there any non-negotiable constraints we should be aware of? Which tenant isolation model is in place today and what constraints exist for extending it across new features? Which performance bottlenecks are most urgent to address in the next release? What AI features are prioritized in the near term and which providers or budgets should I consider? How many tenants do you expect in the next 6–12 months and how is Stripe/billing integrated today? What is your CI/CD setup, release cadence, testing strategy, and deployment expectations? Best regards,

@webperfection123

Hi, What specific features or improvements are you currently prioritizing for your B2B SaaS product? I have a solid background in developing both frontend and backend features, particularly with React and TypeScript in multi-tenant architectures. With over 8+ years of experience in full stack development, and hands-on work integrating AI for automation and intelligent features, I am confident in my ability to enhance your existing codebase while respecting its architectural decisions. I’m also familiar with PostgreSQL and have experience with billing systems like Stripe. If you’re looking for someone to help evolve your product and take ownership of critical features, I would love to discuss further. Best Regards, Priyanka

@rahuliitm69

Hi there, I can step into your existing B2B SaaS codebase and work comfortably within its current architecture, focusing on extending features rather than reworking what already functions well. I have hands-on experience using AI in real products, including integrating AI APIs for automation, analysis, and productivity features, while keeping cost, performance, and reliability in mind for production systems. I will contribute across both frontend and backend, building React + TypeScript features, designing clean APIs, handling SaaS logic like roles, permissions, and tenancy, and improving UX and performance where needed. I can share relevant work privately and would request we connect once to discuss the current setup and long-term collaboration. Thanks, Rahul A.

@OutsourceMan

⭐⭐⭐⭐⭐ Hello Valuable Client, CnELIndia, led by Raman Ladhani, is well suited to collaborate on your evolving B2B SaaS platform for the U.S. market. We have strong experience working within mature codebases, respecting existing architecture, and incrementally improving systems in growth phases rather than greenfield builds. We will start with a structured onboarding to understand your current React + TypeScript stack, multi-tenant design, and SaaS business logic. From there, we’ll develop new frontend and backend features, enhance permissions and role management, and improve performance, UX, and code quality without disrupting ongoing development. Raman Ladhani brings hands-on expertise in integrating AI into real-world products—leveraging AI APIs for automation, analytics, and productivity while carefully managing cost, scalability, and production impact. Our team follows a full-stack mindset with strong API design, Tailwind-based UI development, and experience with PostgreSQL, Supabase, and Stripe-style billing flows. We focus on ownership, clear communication, and long-term collaboration to help your product scale reliably and intelligently.

@techplusintl

Hi there, ★★★ Website Design / API Development / Tailwind CSS Expert ★★★ 6+ Years of Experience ★★★ I will efficiently contribute to the ongoing development of your B2B SaaS product by leveraging my experience in full stack development and AI integration. Key steps include: 1. Review the existing codebase and architecture (4 hours) 2. Develop new frontend features using React and TypeScript (8 hours) 3. Implement backend features and API integrations (8 hours) 4. Optimize performance and improve UX based on feedback (6 hours) 5. Collaborate on AI feature integration and testing (4 hours) What I need from you: 1. Access to the existing codebase and documentation 2. Clear specifications for the features to be developed 3. Regular feedback and communication during the project I look forward to connecting at your convenience to ensure the project's success. Best Regards, TechPlus Team

@divumanocha

With over a decade of experience and as one of the top-rated experts in my field, I genuinely believe that I would be a perfect fit for your Full Stack Developer role. My tech stack includes React, TypeScript and API design and consumption - everything you need to continue developing and refining your B2B SaaS product. I have extensive experience maintaining existing codebases, respecting architectural decisions, and driving system evolution, which will be crucial to efficiently collaborating on your project. In addition to my expertise in your project's core technologies, AI is where I truly excel. Throughout my career, I have consistently demonstrated my ability to transform AI into practical use with automation, assistance, analysis, and productivity. I also possess a deep understanding of the costs, limitations, and impact of AI on production - a skill that will certainly be very valuable as we continue to improve your product. I'm tenacious about quality; hence regularly improving performance, user experience and code quality are second nature to me. While my skills match your project requirements impeccably well, I believe that our approach to work aligns too. I'm focused on ownership, responsibility and long-term collaboration. Thanks....

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Website Design, UML Design, User Interface / IA, AngularJS, Full Stack Development, API Development, Tailwind CSS, AI Development and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@Hammadhassan21

Hello, I hope you are doing well i will help you build and enhance your B2B SaaS product by contributing to both frontend and backend development within your existing React and TypeScript codebase, implementing new features while respecting the modular, multi-tenant architecture, handling roles, permissions, and core SaaS business logic, and integrating practical AI functionality for automation, analysis, and productivity, all while improving UX, performance, and code quality, delivering maintainable, production-ready solutions with Tailwind CSS styling and API integration, and ensuring long-term collaboration to help your product scale confidently in the U.S. market. PS: I can start from now and can deliver this project asap with your 100% Satisfaction with Unlimited Revisions. Please provide me a chat, I want to ask you some questions and can start from now Looking Forward to your Response. Best Regards, Hammad Hassan

@nikhilgarg96

With my extensive experience as a Full Stack Developer, proficiency in front-end leaning technologies such as React + TypeScript, and back-end mastery in languages like Node.js and Python, I am very confident I can cater to your requirements. Do you need assistance with developing new frontend & backend features, adhering to modular architecture within a multi-tenant structure, or engaging raw AI power for process automation and intelligent features? You have all these needs covered and more with me. I've got you covered on the `design` front too – be it creating ‘a vibrant yet professional appeal’ or an ‘easy user flow’. With tools like Figma and Photoshop in my arsenal, creating those aesthetically pleasing UI/UX designs is quintessential to my work process. My availability for flexible hours suits your remote collaboration style perfectly. Moreover, my consistency in building partnership for long-term success aligns with the kind of long-term relationship you seek, rather than just settling on 'one-off tasks'. So if reliability, ownership, and responsibility are pivotal characteristics you are looking for – then let's not waste any more time but connect ME and YOUR PROJECT NOW! Thanks....

@webozza

Hi there, I can help evolve your B2B SaaS product by developing new frontend and backend features with React + TypeScript. I’m experienced with multi-tenant architectures, role-based permissions, and real SaaS logic. I’ll also integrate AI features (automation, analysis, productivity) and improve performance, UX, and code quality when needed. I’ve worked with AI APIs (e.g., automation tools) and have a solid understanding of the cost and production impact. Let’s kick off with a quick chat—share the current product stage, any key AI features you’d like, and any integrations you’ve already implemented, and I’ll reply with a clear roadmap, timeline, and collaboration details. Best, Webozza

@sagarjain4010

Hi, I understand you’re building a real B2B SaaS product that’s already in use and still evolving. I’m comfortable working inside an existing system, learning the codebase, and improving things step by step without disrupting what’s already working. I can handle everything from planning, coding, testing, to deployment and happy to long-term work . I can build new React + TypeScript features, work with APIs, handle roles, permissions, and multi-tenant logic, and improve performance and UX when needed. I’ve also used AI in production for automation and intelligent features, with a clear understanding of costs, limits, and real-world impact. I’d like to clarify a few things 1 Which areas need the most help right now: frontend features, backend logic, or AI work? 2 How is multi-tenancy currently handled (DB-level, schema-based, or app-level)? 3 Do you already have AI features in production, or are these planned? I’m interested in a long-term collaboration, taking ownership and contributing consistently as the product grows. Happy to discuss details and ready for call Best, Sagar

@mascotindia123

Hi, I’m a full-stack developer with strong experience working on evolving B2B SaaS products built on React and TypeScript, comfortable contributing to established codebases and architectures. I regularly build and maintain multi-tenant systems with real permissions, roles, and production-grade business logic. I would be glad to help scale and refine your product for the U.S. market. Ready to begin immediately and deliver efficiently. I will provide you daily progress updates with proper communication along with 100% quality of work. Please review my portfolio and let me know your availability so we can discuss the project scope and begin work as soon as possible via CHAT. With gratitude and best wishes, Harpreet Singh

@Apurva510

With my extensive 7+ years of experience and expertise in Full Stack Development, I am confident that I'm the perfect fit for your B2B SaaS project. My vast understanding of MEAN/MERN stack, AI, and proficiency in React/Typescript align seamlessly with the project's technical requirements. I have precisely worked with an existing codebase, respecting architectural decisions while refining systems, which is exactly what you need. Furthermore, my hands-on experience with AI and integrating AI APIs in real products equip me to bring valuable insights to implement featureswith practical use of AI - an aspect particularly highlighted by your project. Additionally, I have worked on multi-tenant systems before and am familiar with billing/payment integration via Stripe - covering two of the additional skill preferences. Thanks....

@Rekhathakur

I'm Rekha from WellSpring Infotech, and I understand the critical need for a solid development process in a maturing B2B SaaS product like yours. With more than 10 years of experience delivering customized and scalable solutions across various sectors, including Healthcare, eCommerce, Fintech, Real Estate, and proptech, we are confident in our ability to contribute to your project's growth and refinement phase. Our proficiency in React + TypeScript and API design and consumption aligns perfectly with your project requirements. In addition to a strong full-stack mindset, we also have experience in utilizing AI in real products; integrating AI APIs for automation or intelligent features; and balancing the cost, limitations, and production impacts of this technology – all of which are essential aspects of your project. Having successfully built multi-tenant systems like yours before, we bring an added level of expertise that will enable us to maintain your platform's modularity while enhancing performance, improving UX/UI where needed, and ensuring code quality. Thanks....

@wpexpert0141

Hi there, I’ve reviewed your B2B SaaS requirement and this fits well with my experience working on mature, multi-tenant products where the focus is on evolving an existing codebase—not starting from scratch. I’m comfortable respecting established architecture while incrementally improving features, performance, and UX. How I can contribute: • Build and extend frontend features in React + TypeScript within a modular SaaS setup • Develop and consume APIs while handling roles, permissions, and core SaaS logic • Integrate AI features responsibly for automation, assistance, and productivity (cost-aware, production-safe) • Continuously improve code quality, performance, and user experience A few quick questions: • How is tenancy currently handled (schema-based, row-level, workspace-based)? • What kind of AI use cases are already live vs planned? I’m interested in a long-term collaboration and happy to start with a focused scope to align expectations quickly. Best regards, Shiv

@phpxpert89

Hello there, I have reviewed the requirements for the Full Stack Developer role for the B2B SaaS project and understand the need for someone proficient in React, TypeScript, API design, and AI integration. I am well-equipped to work within an existing codebase, enhance system architecture, and implement new features to improve performance and user experience. To give you a better idea of my capabilities, I invite you to review my portfolio: https://www.freelancer.pk/u/phpxpert89 If you are interested in discussing this project further, please feel free to initiate a chat. Best regards.

@Techislandsllc

Hello Vitor M., We went through your project description and it seems like our team is a great fit for this job. We are an expert team which have many years of experience on Website Design, UML Design, User Interface / IA, AngularJS, Full Stack Development, API Development, Tailwind CSS, AI Development Lets connect in chat so that We discuss further. Thank You