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Project Overview: We are migrating an established SaaS platform from an outdated, legacy WordPress build to a high-performance, custom-engineered infrastructure. All 16 high-fidelity UI/UX layouts are already finalized in Figma. We are looking for an architect to build the "frontend shell" for SEO/Ads speed and the "backend engine" for secure data handling. Core Technical Scope: • Track 1 (Performance Frontend): Convert Figma designs into a 100% custom-coded environment. Objective: 95+ Mobile PageSpeed Score for optimized Ad-spend and SEO rankings. • Track 2 (Logic & Security): o Implementation of a custom pricing engine with dynamic percentage-based fee logic. o Development of a secure encryption vault for sensitive user credentials (AES-256). o Integration of a high-end REST API analytics dashboard. • Track 3 (Payments): Advanced integration of secure payment gateways for tiered subscription plans. Mandatory Technical Requirements: • No Page Builders: Zero reliance on Gutenberg, Elementor, or heavy plugins. • Security-First: Proven experience with OpenSSL and secure data transit. • Architecture: Ability to build modular, scalable PHP/JS that can handle high-volume data without performance lag. Note to Applicants: This is a high-confidentiality project. Shortlisted candidates will be required to sign a Mutual NDA before receiving the full Technical Mandate, Brand Identity, and Figma access.
Project ID: 40374618
110 proposals
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Active 23 days ago
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Hi, We’ve reviewed your migration scope. This is a full architecture upgrade, not just a rebuild. We can deliver within ₹45,000 in 8 days, focusing on performance, security, and scalability. Relevant Experience We’ve built custom SaaS systems, high-performance dashboards, and secure backend architectures including pricing engines, subscriptions, and API-first platforms. Approach Track 1 – Performance Frontend • Convert Figma to fully custom code (no builders) • [login to view URL] + SSR for SEO & ad performance • 95+ mobile PageSpeed via lazy loading, code splitting, caching Track 2 – Logic & Security • Dynamic pricing engine (modular, % logic) • AES-256 encryption vault (OpenSSL) • Secure APIs (token auth + rate limiting) • REST analytics dashboard Track 3 – Payments • Tiered subscriptions + webhook handling • Secure gateway integration • Retry + downgrade-safe billing logic Architecture • Backend: PHP / Node.js • DB: PostgreSQL / MySQL • API-first, Docker-ready Execution (8 Days) Day 1–2: Setup + architecture Day 3–5: Frontend + pricing Day 6–7: Security + payments Day 8: Testing + deploy We build systems that are fast, secure, and scalable under real load. NDA ready.
₹45,000 INR in 8 days
2.9
2.9
110 freelancers are bidding on average ₹58,298 INR for this job

With nearly two decades in the industry, CnELIndia brings a wealth of expertise to your SaaS infrastructure migration project. We understand the urgency and need for confidentiality in such ventures, and we value the safety of your data as much as you do. Our seasoned team has a thorough understanding of encryption techniques using OpenSSL, ensuring sensitive user credentials are in good hands. Your project will benefit from our vast experience in PHP and web development while building 100% customized environments from Figma designs, bypassing reliance on any page builders. Our relentless dedication to SEO optimization means we promise a mobile PageSpeed score of 95+, elevating your ad-spend efficacy and SEO rankings. We aim to redefine performance metrics and push boundaries with every project. Payment integration security is a non-negotiable aspect of any SaaS platform. Trust us to deliver by flawlessly integrating secure payment gateways for your tiered subscription plans. Your search for an experienced and highly-skilled full-stack architect ends here! Partner with CnELInda today to transform your WordPress legacy build into a secure, high-performing masterpiece that sets new industry standards for SaaS infrastructure.
₹56,250 INR in 7 days
9.1
9.1

Your PageSpeed bottleneck isn't the frontend - it's the WordPress core making 40+ database calls per page load. Migrating to a custom PHP architecture will eliminate plugin bloat, but if you're still using shared hosting or haven't implemented Redis object caching, you'll cap at 75 Mobile PageSpeed regardless of code quality. Before architecting the migration, I need clarity on two infrastructure constraints: 1. What's your current server environment? If you're on managed WordPress hosting, we'll need to provision a VPS with Nginx + PHP-FPM to hit 95+ scores. 2. Does your pricing engine need real-time calculations or can we cache fee structures? Dynamic percentage logic on every request will add 200-300ms latency without proper optimization. Here's the execution framework: - FIGMA TO CUSTOM PHP: Build a component-based templating system with lazy-loaded JavaScript modules, eliminating render-blocking resources that kill mobile scores. - AES-256 ENCRYPTION VAULT: Implement OpenSSL with key rotation and salted hashing for credential storage, ensuring zero plaintext exposure in your database. - PRICING ENGINE: Design a rules-based calculation layer with Redis caching to handle tiered subscriptions without querying the database on every page load. - REST API DASHBOARD: Integrate analytics endpoints with JWT authentication and rate limiting to prevent unauthorized access while maintaining sub-500ms response times. - PAYMENT GATEWAY: Set up Stripe with SCA-compliant checkout flows and webhook retry logic to achieve 99.8% transaction success rates. I've migrated 4 SaaS platforms off WordPress, including one that went from 62 to 97 Mobile PageSpeed after eliminating theme dependencies. I don't take on projects where hosting infrastructure isn't addressed upfront - let's schedule a 20-minute technical call to review your server specs and finalize the architecture before you commit budget.
₹50,630 INR in 21 days
7.2
7.2

As an Seasoned Full Stack Developer with over a decade of experience, I have successfully aligned business needs with technological solutions. My track record involves completion of over 100 projects just like yours. From the UI/UX & SEO optimization you need to the secure data handling your project necessitates using high-end REST API analytics dashboard, I have demonstrated, time and again, an ability to produce not just workable solutions but finely-tailored ones suited specifically to clients' requirements. My past projects have aligned my skills with various tasks such as logical system design like the implementation of custom pricing engines and development of secure encryption vaults as well as advanced payment gateway integration which can come in handy for your SaaS migration project. I am also adept at eCommerce development which I believe will be a big plus for integrating tiered subscription plans. What sets me apart is my dedication not just towards work but also towards long-term support. With your high-confidentiality project, I understand your need for non-disclosure, rest assured not only do I sign a Mutual NDA adhering to all your necessary clauses but I deliver my task quickly without compromising quality and strictly uphold clear communications throughout the project timeline
₹59,999 INR in 15 days
6.5
6.5

Hello, I appreciate you sharing your project details with me. I'm eager to assist in turning your ideas into reality. With over 8 years of experience as a full-stack developer, I specialize in building and optimizing scalable SaaS platforms that align seamlessly with business and performance goals. My background includes handling complex infrastructure migrations, translating Figma designs into production-ready applications, and ensuring high availability and performance across systems. I can work with you to architect and execute a high-performance SaaS infrastructure migration, ensuring minimal downtime, improved scalability, and optimized system performance. This includes clean code implementation from Figma, efficient backend architecture, API integrations, and deployment strategies tailored for reliability and growth. My approach focuses on maintainability, security, and seamless user experience throughout the transition. I look forward to the chance to work together and help make your project a success. Warm regards, Sush
₹40,000 INR in 7 days
6.4
6.4

Hi, Your project requires a performance-first and security-driven architecture, and that’s exactly where my experience fits. I can build a fully custom frontend (from Figma) optimized for 95+ PageSpeed, ensuring fast load times and strong SEO/ads performance without relying on page builders. On the backend, I’ll develop a modular and scalable system with a dynamic pricing engine, secure AES-256 encryption for sensitive data, and robust REST API integrations. I have solid experience handling secure data flows and implementing best practices using OpenSSL and modern backend standards. I can also integrate secure payment gateways for subscription models while maintaining performance and reliability under high load. Clean architecture, documentation, and long-term scalability will be a priority. I’m comfortable signing an NDA and proceeding with a high-confidentiality workflow. Let’s connect to review the technical mandate and begin. Best regards, TacticsSoft
₹56,250 INR in 7 days
5.9
5.9

I’ve handled migrations from legacy WordPress to custom-built platforms focusing on speed and security. For your project, I’ll start by translating your Figma designs into lean, hand-coded frontend components targeting a 95+ PageSpeed score on mobile, ensuring ad spend stays efficient and SEO rankings improve. On the backend, I’ll develop a modular PHP/JS architecture to support your custom pricing engine with dynamic fee calculations, plus a secure AES-256 vault for sensitive data, built with OpenSSL for strong encryption and data transit security. My approach keeps everything scalable and optimized for high-volume traffic. For payments, I suggest integrating payment gateways that support tiered subscriptions through tokenization, minimizing PCI exposure and improving user experience. Quick question: do you want real-time updates on your analytics dashboard, or is periodic batch data acceptable? Also, should the frontend shell support server-side rendering for SEO or rely on client-side hydration? Ready to sign the NDA and get started building out your fast, secure new platform.
₹56,250 INR in 7 days
6.1
6.1

****** High-Performance SaaS Platform Migration (Custom Architecture Build) ****** Hello, How are you? I've checked your requirement and you’re looking for a senior-level developer/architect to migrate an existing WordPress-based SaaS platform into a fully custom, high-performance, security-first system with optimized frontend rendering, scalable backend logic, and advanced payment infrastructure. • Full migration from legacy WordPress to custom architecture • Pixel-perfect conversion of 16 Figma UI/UX layouts • High-performance frontend optimized for 95+ Mobile PageSpeed • Fully custom-coded UI (no page builders or heavy plugins) • Modular, scalable PHP/JavaScript architecture • Custom pricing engine with dynamic fee calculations • Secure encryption vault for sensitive user data (AES-256) • Secure data transmission layer (OpenSSL standards) • REST API integration for analytics dashboard • Tiered subscription system with payment gateway integration • Subscription billing & recurring payment handling Note on NDA: Understood—this type of project is appropriately handled under NDA. I’m comfortable signing a mutual NDA before receiving Figma access and full technical documentation. Lets connect... Thanks
₹38,250 INR in 7 days
5.7
5.7

Hi there, I’ve built several custom SaaS platforms and high-performance PHP/JS architectures, including secure systems with encryption, APIs, and subscription payments. I can convert your Figma designs into a lightweight custom frontend (95+ PageSpeed) and build a scalable backend with secure AES-256 data handling and pricing logic. Experienced with OpenSSL, REST APIs, and payment gateway integrations without relying on page builders or heavy plugins. Happy to sign the NDA and review the full technical mandate to start immediately. Thanks
₹56,250 INR in 7 days
5.6
5.6

Hello, I can architect and build your SaaS platform with a performance-first frontend and a secure, scalable backend—fully aligned with your requirements. I have experience replacing legacy WordPress systems with custom PHP/JS architectures focused on speed, security, and long-term scalability. Here’s how I’ll approach it: • Convert Figma designs into a lightweight, custom frontend (no builders) targeting 95+ mobile PageSpeed • Build a modular backend with clean PHP architecture for high-performance data handling • Develop custom pricing engine with dynamic fee logic • Implement AES-256 encryption (OpenSSL) for secure credential storage • Integrate REST-based analytics dashboard • Set up secure subscription payments with tiered plans Key focus: • Zero bloat, fully custom codebase • Security-first architecture (data encryption, secure APIs) • Scalable structure for high traffic and future expansion I’m comfortable working under NDA and handling confidential systems. Ready to review the full technical mandate and begin immediately. GK
₹90,000 INR in 30 days
5.3
5.3

I’m a senior full-stack developer with strong experience in custom SaaS architectures, high-performance frontends, and secure backend systems. I can build your platform from Figma into a fully custom, lightweight frontend (no page builders) optimized for 95+ mobile PageSpeed, ensuring fast load times and strong SEO/ads performance. On the backend, I have hands-on experience with secure data handling (AES-256/OpenSSL), custom pricing engines, REST API integrations, and scalable PHP/JS architectures designed for high-volume environments. I can also implement robust subscription billing systems with secure payment gateway integrations. I’m comfortable working under NDA and can take ownership of both the frontend shell and backend engine, delivering a clean, modular, and production-ready system. Ready to review your Figma designs and technical mandate.
₹56,250 INR in 7 days
5.4
5.4

Hi, As per my understanding: You are migrating a SaaS platform from a legacy WordPress setup to a custom-engineered infrastructure. You need a high-performance frontend based on 16 finalized Figma designs with a focus on SEO and speed, alongside a robust backend. The core logic involves a dynamic pricing engine, an AES-256 encryption vault for sensitive data, and a REST API analytics dashboard. This project demands a clean, builder-free architecture to ensure scalability and top-tier security for tiered subscriptions. Implementation approach: 1. Frontend Engineering: I will develop a 100% custom-coded frontend using modern JS and optimized CSS to ensure a 95+ PageSpeed score, avoiding all page builders to minimize bloat and maximize ad-spend efficiency. 2. Security & Backend: I will implement a secure PHP/JS backend using OpenSSL for data transit and AES-256 for the credential vault, ensuring high-volume data handling without performance lag. 3. Feature Integration: I will build the custom pricing engine with the required fee logic and integrate the subscription payment gateways using secure API protocols. 4. Analytics: I will develop a high-end REST API dashboard to provide real-time metrics while maintaining the modularity and scalability of the entire system. A few quick questions: 1. Are you leaning toward a specific stack like React/Node.js or custom PHP for the backend engine? 2. Does the existing WordPress data need to be migrated into the new encryption vault?
₹37,500 INR in 20 days
5.4
5.4

**DO NOT PAY ME UNTIL I COMPLETE! :)** Hello my valuable client :) My profile is new over here but I have 7 years of experience in this field. I have completely understood about your project. Also I will provide you free maintenance on your project for 1 year after project completion. I can definitely complete this in your timeframe. Give me one chance to prove myself. Hit the chat button to get started. If you will not like my work then you dont need to pay me any money so dont worry and have faith in me :) I am eagerly waiting for your message.
₹45,000 INR in 7 days
4.5
4.5

Hey, I understand the need for a Senior Full-Stack Architect to lead the migration of an established SaaS platform to a high-performance infrastructure. With all 16 UI/UX layouts finalized in Figma, my approach involves converting designs into a custom-coded environment for optimal performance, implementing logic and security measures, and integrating secure payment gateways. My proficiency in WordPress, Website Design, Figma, HTML, and Web Development equips me to handle the frontend and backend aspects of this project effectively. I have experience in building secure data handling systems, custom pricing engines, and secure payment gateways. Best Regards, Sana
₹37,500 INR in 7 days
4.2
4.2

Hey, I liked your project, Senior Full-Stack Architect: High-Performance SaaS Infrastructure project and believe I can help you with the project. With my background in PHP, JavaScript, Website Design, I'm confident I can meet your requirements. Would be glad to go over specifics if you're interested.
₹37,500 INR in 7 days
4.7
4.7

With over a decade of experience as a web and software developer, my expertise lies in translating complex requirements into scalable, reliable, and high-impact digital systems. This resonates perfectly with your project's need for a high-performing SaaS platform with a stringent focus on security and speed. My understanding of modern tech stacks, smart architecture, and future-ready solutions ensures that I can build the frontend shell for optimal SEO/Ads performance as well as the backend engine for secure data handling. Notably, your project explicitly mentions zero reliance on page builders like Gutenberg and Elementor – an area where I excel. I believe in creating tailor-made digital solutions without over-dependence on these types of plugins. Moreover, my knowledge and experience with OpenSSL guarantee that your migration will prioritize data security at every stage.
₹50,000 INR in 5 days
3.9
3.9

Hello, I have carefully reviewed your project requirements and understand you are seeking a reliable professional who can deliver a well-planned, high-quality digital solution with clarity, commitment, and long-term value. I am a full-stack developer and digital solution consultant with 4+ years of freelance experience, passionate about building scalable, user-friendly, and business-oriented web and mobile applications. My approach to work is structured and transparent, ensuring the final output aligns exactly with the client’s expectations. Why I’m a strong fit for your project: Hands-on experience in MERN Stack, PHP, Laravel, HTML, WordPress, Shopify, and modern UI design. Application development for Android and IOS in Flutter Strong background in website design, graphics, and customer-centric interfaces Proven ability to manage projects end-to-end, from planning and development to deployment and support Experience working with clients who value quality, timelines, and clear communication I focus on clean code, intuitive design, and performance optimization, ensuring the solution is reliable, secure, and easily scalable. I believe in honest commitments, realistic timelines, and delivering exactly what is promised. I want to discuss your goals further and clarify any details needed before moving ahead. Thank you for your time and consideration. Looking forward to the opportunity to work together. Best regards, Arshiya
₹50,000 INR in 7 days
3.9
3.9

As a seasoned Full-Stack Architect, I have spent the last decade specializing in Web and Software Development with a strong focus on quality assurance. Over the years, I have taken a security-first approach using OpenSSL for data transit ensuring utmost data security, a core requirement for this project. In line with this, I am adept at developing robust systems that are both modular and scalable with the ability to handle high-volume data with no performance lag. My skill set is thoroughly aligned with your Track 1 front-end needs. With Figma being the design point for your project, I can expertly convert these designs into a 100% custom-coded environment, optimizing page speed for better SEO rankings and efficient ad-spend management. Moreover, I have vast experience building in PHP/JS coupled with extensive knowledge of CSS and HTML making me well-suited for creating the 'frontend shell' you seek. Lastly, I understand the importance of confidentiality within projects of this nature and methodologies. Having worked on various custom platforms including SaaS solutions, I've ensured utmost privacy for all my clients. Please feel free to share any additional details about your project so we can delve into how I'll make
₹56,250 INR in 7 days
4.0
4.0

Hello, I can build your SaaS platform with a custom high-performance frontend shell and secure backend engine. I’ll convert your Figma layouts into a 100% clean-coded, PageSpeed-optimized system (95+ mobile) with no page builders. The architecture will be modular, scalable, and built for high-volume performance. I will deliver: • Figma to pixel-perfect custom frontend • Dynamic pricing engine (percentage logic) • AES-256 secure credential vault • REST API analytics dashboard • Secure subscription payment integration • SEO-safe, fast-loading structure I follow strict security standards and can work under NDA. Best regards, Atul
₹56,250 INR in 7 days
5.2
5.2

I’ve read your requirements carefully, and I can help you migrate and rebuild your SaaS platform into a high-performance, security-first custom system based on your existing Figma designs. I specialize in building modular, scalable PHP/JS architectures without page builders, focusing on speed, clean code, and long-term maintainability. My approach will be to convert all 16 UI/UX screens into a fully custom frontend shell optimized for 95+ PageSpeed (mobile-first), while building a secure backend engine with proper encryption (AES-256 level security practices), REST API integrations, and a scalable structure for high-volume data handling. I will also implement a robust pricing engine with dynamic fee logic and integrate secure subscription-based payment gateways for tiered plans. The system will be fully modular, performance-optimized for SEO/ads, and built with security best practices (secure data transit, hardened endpoints, and structured access control). I’m comfortable working under NDA and can start immediately after reviewing the full technical mandate. Best regards, W3loop
₹56,250 INR in 7 days
3.6
3.6

★★★★★★ START NOW ★★★★★★ Message me so we talk in detail.. Hello, I can Fix Missing Text on Corporate Pages perfectly !! I placed bid after checking your requirements. If you want you can ask me any questions regarding your requirement. I'm interested in working on your project. And don't worry about work. First, check my work if you are happy Then pay me. Please let me know if you require any detailed information. Waiting for your reply. I hope you respond to me. Thanks Govind
₹37,500 INR in 7 days
3.5
3.5

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