Full-Stack Developer Needed for Existing SaaS Platform – Apple Wallet / PassKit Experience Required

@Microlent

Hello, I am Dr. Rajesh Rolen, PhD in Computer Science & Engineering, with experience of over 20+ years in Android, SaaS, Backend Development, Full Stack Development As a preferred freelancer in the top 1%, I have done 400+ projects here on freelancer.com, I have 4.9 ratings out of 5 on average, which showcases my quality of work and timely delivery. Key Highlights: - Free Hosting Support on the Cloud or any desired platform. - Free 3 months of post-delivery support to ensure that our client doesn’t face any challenges after the launch of the project. - Free Dedicated tester on projects to ensure quality delivery, so clients don’t need to act as a tester. - 10+ Years experience UI/UX team to ensure intuitive UI. Portfolio: https://www.freelancer.com/u/Microlent Please open the chat and send me a message, so we can have a more detailed discussion about the project to give you the project timeline and cost. Thank you for considering my services. I look forward to engaging in a productive conversation and understanding how I can be of assistance in bringing your project to life. Regards Rajesh Rolen

@Herculesz

Hi, this is a takeover and audit problem first, not a rebuild, and that distinction matters because Apple Wallet implementations usually fail at tenant boundaries, signing ownership, and update infrastructure rather than UI. The real risk here is migration safety and data integrity across pass identifiers, certificates, business isolation, and deployability after the current team exits. I’ve done similar work stepping into live products, reviewing code and system boundaries, and turning a vague handoff into something independently buildable and maintainable. I would first validate repositories, environments, credentials, signing assets, and the pass issuance/update path before touching feature work. The closest relevant project here is Custom Feature Development & Integration, where I performed an initial code walkthrough, identified system friction points, and defined implementation and handoff strategy inside an existing product. That maps well to your audit-first requirement. I usually structure this kind of review by separating tenant configuration, pass generation/signing, update delivery, and dashboard/admin controls, then checking where those boundaries leak. The main tradeoff is preserving the current platform while tightening isolation and operational visibility enough to support long-term maintenance. If useful, I can start by outlining the highest-risk review areas for the Wallet and multi-business architecture. Thanks, Hercules

@sharmarahulraman

WALLET PROJECT Hi, I have experience with full-stack SaaS development, API integrations, databases, mobile apps, dashboards, and cloud deployments, and I understand that this project requires a proper technical takeover and audit—not a rebuild from scratch. I can review the complete codebase, database, infrastructure, deployment setup, authentication, QR logic, notifications, and especially the Apple Wallet/PassKit architecture, including ".pkpass" generation, Pass Type IDs, certificates, signing, identifiers, multi-business separation, and pass update workflows. I can also review the Google Wallet implementation and identify technical debt, bugs, and security issues. A few questions: - Which backend/framework and cloud infrastructure is currently being used? - Will the complete source code, Apple Developer credentials/certificates, and deployment access be available during the audit? - Do you have a defined deadline for completing the initial takeover? I’m available for ongoing development after the audit and can provide a clear audit report with prioritized issues, recommendations, and a roadmap before major changes begin. Initial audit: I can provide the exact timeframe and fixed price after reviewing the repository size and infrastructure details.

@zeeshan5121472

WALLET PROJECT — Your main requirement is to take over and audit the existing SaaS platform, with particular focus on the multi-business Apple Wallet/PassKit architecture, certificates, Pass Type IDs, pass signing, and Wallet updates. With 9+ years of full-stack and mobile development experience, I can review the existing iOS, Android, backend, dashboards, database, deployments, and Wallet/Google Wallet integrations to identify risks before further development. I’ll verify the complete handover, audit the Wallet implementation and multi-tenant separation, document issues and technical debt, and provide a clear roadmap for ongoing development.

@mrresearcher99

WALLET PROJECT Hello, I have 10 years of experience taking over existing SaaS platforms, reviewing full-stack codebases, and stabilizing mobile, web, backend, database, and deployment environments. I can begin with a structured technical audit rather than making assumptions or rebuilding working components. My review will cover multi-tenant business separation, Pass Type IDs, serial and grouping identifiers, pass generation and signing, certificate configuration, update infrastructure, Apple Wallet integrations, Google Wallet, QR logic, push notifications, customer flows, access control, and deployment readiness. I will also examine the loyalty stamp layout and identify architectural risks, technical debt, duplicate-card issues, and missing credentials or assets. My preferred backend approach is Node.js with REST APIs and a relational database where appropriate. I can provide a written audit, prioritized roadmap, and takeover documentation before ongoing development begins. Best regards

@Hammadhassan21

WALLET PROJECT Hey there! The key here is auditing the existing PassKit architecture before changing anything, especially the multi tenant separation around passTypeIdentifier, serialNumber, signing certificates, business branding, and the update flow. I’d verify these pieces end-to-end rather than treating the Wallet integration as simply a .pkpass generator. I can take over the existing iOS, Android, backend, dashboards, database, deployment setup, and credentials, then document what’s working, what’s fragile, and what needs correction before new development begins. If you share the current stack and repository structure, I can quickly assess the architecture and identify the safest path forward. Would you like me to start with a technical audit before making any changes? Checkout my portfolio https://www.freelancer.com/u/Hammadhassan21 Best regards, Hammad Hassan

@InterconnectBPO

WALLET PROJECT I can help ensure a seamless transition and thorough audit of the existing SaaS platform, focusing on the critical Apple Wallet integration and multi-business functionality. I understand the emphasis on a complete technical takeover, including reviewing the source code, dashboard configurations, and verifying project assets. This audit is essential for maintaining a robust and scalable infrastructure. My expertise encompasses full-stack development with a strong background in Apple Wallet and PassKit, including .pkpass management, REST APIs, and cloud deployment. I have successfully taken over projects from previous teams, ensuring continuity and quality. I am ready to provide a comprehensive audit and support ongoing development. Regards, Jp

@OutsourceMan

I am a senior Full-Stack Developer with extensive experience auditing, refactoring, and maintaining complex multi-tenant SaaS platforms, specifically leveraging deep Apple Wallet (PassKit) and Google Wallet architectures. Takeover & Audit Methodology Asset & Environment Verification: Audit repository, build pipelines, production/staging environments, database schemas, and credential handovers (Apple Developer Program, Pass Type Certificates, App Store Connect API keys, webhooks). PassKit Multi-Tenant Architecture Review: Audit passTypeIdentifier, serialNumber, and groupingIdentifier separation per business entity to prevent cross-tenant collisions. Core SaaS & API Inspection: Audit REST/GraphQL endpoints, multi-tenant database isolation, QR code payload integrity/security, customer registration/duplicate check logic, and push notify systems. Audit Deliverable: A detailed technical debt ledger, security vulnerability report, bug backlog, and structural roadmap before commencing Phase 2 features. Experience Highlights Hands-on setup of Pass Type IDs, Apple Developer Certificates, dynamic CSR/PEM certificate rotation, and App Store Connect API automation. Tech stack proficiency: Node.js/Python/Go/Laravel backends, React/Vue dashboards, native/React Native mobile, SQL/NoSQL databases, AWS/GCP hosting. Looking forward to discussing your platform's specific architecture!

@rbtech1984

WALLET PROJECT We can perform a complete technical takeover and audit of your existing SaaS platform, focusing deeply on multi-tenant Apple Wallet PassKit architecture, certificates, and code stability. To plan the handover smoothly: * Do you currently have full access to the Git repositories and server hosting? * Are the Apple Developer certificates and Pass Type IDs ready for review? * Which backend stack is the platform currently running on? Our audit thoroughly inspects pass signing, multi-business isolation, and database structures to ensure seamless independent maintenance. Having handled complex PassKit integrations and project handovers, transforming existing codebases into stable products is our strength. Would you be open to a quick chat to discuss the takeover? Best regards Farhin B

@CodeAnchors

Hello, I hope this message finds you well. I have reviewed your project requirements for a Full-Stack Developer with Apple Wallet/PassKit experience to take over your existing SaaS platform. My expertise lies in Full Stack Development, Apple Wallet integration, backend development, and database management, making me a suitable candidate for this project. In terms of execution, I follow a structured approach encompassing requirement confirmation, controlled planning, clean implementation, testing, and milestone-based transparency to ensure efficient project delivery. You can view my portfolio here: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ To better understand your priorities, could you please share more insights into your primary business goal with this project? I believe a direct discussion would help in finalizing the project scope seamlessly. Best regards, Muhammad Anas Khan

@XanvraTECH

Hello, I am a seasoned Full-Stack Developer with expertise in Android, Backend Development, and Full Stack Development. I have a strong understanding of the project requirements for the Full-Stack Developer position with Apple Wallet / PassKit experience. I am well-equipped to review the existing system, conduct a technical audit, and ensure a seamless takeover. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I suggest a follow-up discussion to delve deeper into how I can contribute to the project's success. Best regards, Warda Haider

@denisSolution

Hello, I'm Denis, a full-stack developer with experience in multi-tenant SaaS platforms and Apple Wallet/PassKit integrations. I’ll perform a thorough audit of your system with special focus on Wallet architecture. The audit covers: verifying separation between businesses (passTypeIdentifier, serialNumber, groupingIdentifier), ensuring correct certificate and Pass Type ID usage, and confirming stamp icon configurations meet Apple’s requirements. I’ll review your App Store Connect API setup for Pass Type IDs and certificate management, then check pass generation, signing, and update infrastructure. I’ll also assess customer flow, QR logic, push notifications, and security across the stack. I recently resolved a similar issue where Wallet cards were incorrectly grouped across tenants. By reviewing the pass generation flow and adjusting serialNumber patterns, we restored proper separation without rebuilding the frontend. My approach starts with a sync on requirements, followed by a systematic code review across iOS, Android, backend, and dashboards. I’ll verify build, deployment, and hosting setups, document technical debt, and provide a clear path to independent maintenance. Key risks include incomplete handover assets or unclear Apple Developer account access, which we’d handle by requesting missing credentials upfront and documenting any blocking issues. I can start working right away. Let’s connect to discuss the details. Thanks, Denis

@hassans5

Hi, I’m Hassan, a Senior Full-Stack & Mobile Developer with 4+ years of experience in iOS, Android, back end, APIs, and production applications. I can take over your existing SaaS project and start with a complete technical audit covering the code base, database, deployment, security, and especially Apple Wallet/Pass Kit, .pk pass, Pass Type IDs, certificates, signing, multi-business cards, and pass updates. I’ll provide a clear audit report with prioritized issues and recommendations before any major development begins. I’m also available for ongoing maintenance and development after the takeover. Best Regards, Hassan

@invoketech

((WALLET PROJECT)) Hello, I have hands-on experience with projects having similar features. I have 9+ years of Full-Stack experience and can take over your existing SaaS, audit the complete architecture and specifically review the multi-tenant Apple Wallet/PassKit implementation. Key Features --> Audit iOS, Android, backend, dashboards, database and deployment --> Review Pass Type IDs, certificates, .pkpass signing and serial/grouping logic --> Validate business-specific Wallet cards, branding and pass updates --> Review App Store Connect API, Google Wallet, QR and push notification flows --> Identify security issues, bugs, technical debt and deployment gaps --> Provide a clear audit report with fixes and a maintainable handover plan Working Flow: Code handover --> Full audit --> Wallet architecture review --> Issue report --> Fixes --> Deployment validation I’m comfortable working with existing codebases and taking ownership after another development team. I can also continue with ongoing development and maintenance, with 2 years of support after completion. Let’s discuss in chat as I have some queries to ask regarding the project to proceed further.

@ykarora26

With extensive Full-Stack development expertise and specific Apple Wallet/PassKit skills, I understand the need for a seamless transition to take over your existing SaaS project. My similar past work includes successfully auditing and taking over complex systems. How can we ensure a smooth handover process to maintain project integrity and functionality? Regards, Yogesh Kumar

@toriquldev123

Hello Dear, I’m an experienced full-stack and mobile developer with 10+ years of experience building scalable web and mobile applications. I understand you need a ready-made forex trading simulation app for iOS and Android, including simulated trading, generated market data, accounts, and order matching. I have strong experience with React Native, Flutter, Node.js, APIs, databases, and real-time application development. I can review the existing codebase, verify the architecture and device compatibility, and provide complete source code with setup and build documentation. Could you share a demo or brief overview of the existing application and its current technology stack? Best Regards, Md Toriqul Islam

@ZohaibRoy

⭐⭐⭐⭐⭐ Full-Stack Developer for Apple Wallet & PassKit Integration ❇️ Hi My Friend, I hope you're doing well. I’ve reviewed your project details and see you're looking for a Full-Stack Developer with strong Apple Wallet and PassKit experience. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed over 50 similar projects in SaaS platforms. I will conduct a thorough audit of your existing system, ensuring everything is in order before any new development. ➡️ Why Me? I can easily handle your project with my 5 years of experience in Full-Stack Development, focusing on Apple Wallet, PassKit, REST APIs, and mobile applications. My expertise includes backend development, database management, and cloud deployment. I have a strong grip on other relevant technologies, ensuring a smooth transition and future development. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing this with you! ➡️ Skills & Experience: ✅ Full-Stack Development ✅ Apple Wallet / PassKit ✅ .pkpass Management ✅ Pass Type IDs ✅ App Store Connect API ✅ Wallet Certificates ✅ REST APIs ✅ Backend Development ✅ Database Management ✅ Web Dashboards ✅ iOS Development ✅ Android Development ✅ Firebase / Push Notifications ✅ Git / GitHub ✅ Cloud Hosting & Deployment Waiting for your response! Best Regards, Zohaib

@mughiraaa

“WALLET PROJECT” Hello, I have already completed similar SaaS and loyalty platform projects involving Apple Wallet, APIs, dashboards, and multi tenant systems. I have strong full stack experience and can quickly review the existing codebase, understand the current architecture, and identify exactly what needs attention. I can focus closely on the PassKit setup, pass identifiers, certificates, signing, business separation, wallet updates, stamp icons, Google Wallet, QR flows, authentication, and backend integrations before any major changes are made. How are the current Apple Wallet passes generated and updated, and do you already have the Pass Type IDs and certificates available for the takeover? I’d be happy to review the handover and discuss the audit approach in a quick meeting. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira

@longngoc2307

==== Hi - Truong here>>>>>>>>>>>>>>>> "APPLE WALLET / PASSKIT TAKEOVER" — you need to safely take over the existing SaaS and verify the multi-business Wallet architecture before making changes. I would audit the current iOS, Android, backend, database and dashboards first, then trace the complete Wallet flow: pass generation, signing, Pass Type IDs, certificates, identifiers, business separation and pass updates. This avoids rebuilding working parts while exposing issues that could affect existing customers. I would also check the loyalty stamp layout, QR flow, duplicate prevention, push notifications, Google Wallet and production/staging setup. The first step should be a documented audit with clear fixes and priorities before development continues. Which Apple Developer/App Store Connect assets will be included in the handover, and is there a staging environment where Wallet creation and updates can be tested safely? Looking forward to working with you.