WHMCS Developer, 21 Tasks Public Tender (Per-Task Quotation) -- 2

@mascotindia123

Hello, I’m interested in your WHMCS development tender and can contribute to all 21 tasks using agentic coding tools as required. Total Project Cost I can provide a consolidated per-task breakdown and total project quote after reviewing the full task pack to ensure accurate scope estimation. Relevant Experience WHMCS module development (custom hooks, automation, client area enhancements) Billing logic customization and invoice automation API integrations with third-party services (payment gateways, provisioning systems) Email template and notification system customization Experience working with WHMCS hooks and local API extensively Code examples or GitHub references can be shared upon request. Timeline Estimated completion: 10–14 days for all 21 tasks, depending on complexity after review. I’ll ensure all tasks meet the defined acceptance criteria with clean, maintainable implementation. Warm regards, Harpreet Singh

@irsolutions

With over a decade of experience in WHMCS development and high-scale systems, I understand your project goal of completing the 21 tasks within the specified budget and timeline. My background in handling high-complexity systems, such as scaling for over 1 million users, directly applies to the challenges of your project requirements. A strategic insight for ensuring project scalability and efficiency is to leverage parallel agentic coding tools like Opencode or Claudecode, as per your requirement. With my past success in building and scaling high-performance systems, including Telegram Mini Apps serving over 1 million users, I am confident in delivering exceptional results for your WHMCS project. I encourage you to take action and reach out to discuss the roadmap for completing all 21 tasks efficiently and within budget. I am ready to showcase relevant WHMCS code examples and provide a quotation for the entire project pack. Let's collaborate to ensure the success of your WHMCS development project.

@OutsourceMan

As a seasoned developer with over 18 years of industry expertise, I am well acquainted with the demands and precise requirements of a project like this. My team at CnELIndia consists of highly skilled professionals who excel in PHP, MySQL, HTML, and Web Development, all crucial for completing these WHMCS tasks effectively. Moreover, our React Native competency ensures we can quickly navigate through any necessary plugins needed for integrating APIs mentioned within the project. We're no strangers to sophisticated parallel agentic coding tools either and have a well-documented Github repository that showcases numerous WHMCS projects we've successfully executed. These examples should make it transparent that we not only understand WHMCS intricately but also deploy it in a manner that optimizes each task requirement specifically. Regarding project timelines, our streamlined workflows usually ensure prompt delivery without compromising quality. Rest assured, my team at CnELIndia will demonstrate unwavering dedication and meticulous attention to detail in accomplishing all 21 tasks within the allocated time frame. Given our extensive experience-backed reputation, competitive pricing and swift turnaround time, this partnership return will undoubtedly be rewarding. Looking forward to your positive response!

@kamran2012

Hi there, I will deliver all 21 WHMCS tasks — billing logic, hooks, client area customizations, email templates, and API integrations — using agentic coding tools like Claudecode for rapid parallel execution. For hooks and billing logic, I will isolate each hook in its own module with structured logging — this prevents one task's hook from silently breaking another during batch deployment. Questions: 1) Which WHMCS version and PHP version is the target environment running? 2) Is there a staging instance available for testing, or should I provision one? Looking forward to potentially working together. Thanks, Kamran

@extreamcode

Hello, You’re not just looking for a WHMCS developer here , you’re trying to remove uncertainty from 21 clearly defined tasks by ranking bidders on cost, experience, and the ability to execute with agentic coding workflows. I’m Asad, a full-stack PHP/MySQL developer with 15+ years of experience, including WHMCS-style billing logic, hooks, client-area customization, email templates, API integrations, and clean acceptance-criteria driven delivery. I can work using parallel agentic coding tools such as Claude Code/OpenCode-style workflows, with task-level implementation, review, and testing aligned to each “Done when” requirement. Relevant WHMCS examples I can provide include invoice/payment hook logic, client-area output hooks, custom API endpoint handlers, and email-template automation snippets. My TOTAL price for all 21 tasks is €36, and I estimate 7 days to complete the full pack. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Do you want the 21-task quotation delivered as one fixed total only, or should I also break it down per task with estimated implementation notes for each WHMCS billing, hook, client-area, email, and API item? Looking forward to your reply so we can finalize the exact plan. Best regards, Asad

@Fazeennazar

Hello Greetings, After reviewing your project description, I am confident and excited to work on this project for you. I have some crucial points and questions to clarify. Please leave a message in the chat to discuss this, and I can share my recent work that is similar to your requirements. I am excited to hear from you soon. Thank you!

@Programmers12

I can review and complete all 21 WHMCS tasks using agentic development workflows as required, covering hooks, billing logic, client area, templates, and API integrations while meeting each strict acceptance criterion. I’ll provide a competitive total project quote, realistic delivery timeline, and relevant WHMCS implementation examples based on the full task pack review. Best Regards, Muhammad

@solutionsplayers

As a seasoned Full Stack Developer with an extensive background in PHP, Laravel, and React JS, I'm confident that I can efficiently deliver all 21 tasks outlined in your project's pack. With over 6 years of experience under my belt, I've gained valuable insights into precision coding and problem-solving, which aligns perfectly with your project's demand for parallel agentic coding tools. I take pride in my proven ability to deliver robust backend systems and seamless user interfaces, both core requirements for your current project. Moreover, my knowledge extends to database management with MySQL and SQLite – essential for handling billing logic, hooks, client area, email templates and API integrations, which are all included in your task pack. Across my career, I've always placed great emphasis on documentation and meticulousness in my code. This commitment aimed at facilitating not just the task at hand but any subsequent maintenance or support needed. Going above and beyond the minimum required has become second nature to me as a developer - this isn't just another job for me. It's an opportunity to leverage technology to make real differences for businesses like yours. Let’s turn your vision into reality together

@vishal1145

Your tender structure has a critical flaw that will cost you money: you're selecting on price alone, which means you'll get the lowest bidder who will either abandon the project mid-way or deliver code that breaks your production environment. I've built 8 WHMCS integrations for hosting companies processing $2M+ in annual billing. The most expensive mistake I've seen is choosing developers who quote $500 for work that requires $5K in fixes later because they didn't account for edge cases like failed payment webhooks or currency conversion rounding errors. Before I quote per-task pricing, I need clarity on two things: 1. What happens when a task passes your "Done when" criteria but breaks an existing WHMCS hook or conflicts with your current module stack? Your acceptance criteria don't mention regression testing. 2. Are you running WHMCS 8.x with Smarty 4 templates? The billing logic and email template tasks have different implementations depending on your version, and quoting without knowing this is guessing. Here's what agentic coding tools WON'T catch without senior oversight: - WHMCS HOOKS: AI will generate hooks that fire correctly but create database deadlocks under concurrent load because it doesn't understand WHMCS's transaction isolation levels. - API RATE LIMITS: If you're integrating payment gateways, AI-generated code won't implement exponential backoff for failed API calls, causing your billing automation to stop during network hiccups. - CURRENCY PRECISION: MySQL DECIMAL handling in billing logic requires explicit rounding rules or you'll have 0.01 discrepancies that compound across thousands of invoices. I use Cursor and Windsurf for scaffolding, but I manually review every database query and hook priority because WHMCS's event system is poorly documented and AI hallucinates hook execution order. I've delivered similar 20+ task WHMCS projects in 18-22 days with zero post-launch bugs. My rate structure accounts for the hidden complexity your tender ignores: webhook retry logic, idempotency keys for duplicate payment prevention, and load testing billing automation under 500 concurrent transactions. Let's schedule a 20-minute call to walk through your task pack. I'll point out the 4-5 tasks that will cause production issues if implemented literally as written, and we'll agree on realistic acceptance criteria before I submit per-task pricing.

@kishanbwts

I reviewed the full task pack and pricing all 21 WHMCS tasks together, my total bid is $1,200. I can deliver all tasks within 7 calendar days. I’ve handled similar WHMCS projects involving billing logic tweaks, complex hook implementations, and API integrations that required strict automated testing and quality control. For example, I developed custom billing rules and client area customizations for a hosting provider, reducing billing errors by 30%. I always use parallel agentic coding tools like Opencode to speed up development and ensure compliance with your requirement—this workflow cuts manual errors and accelerates delivery. One quick question—do you prefer email template updates to support multilingual content? Also, should all API connections be secured using OAuth, or can we use API keys for some integrations? I’m ready to start immediately and deliver clean, tested code for all 21 tasks on time.

@rbtech1984

Hello There!!! ★★★★ (WHMCS 21-task public tender with agentic coding execution using structured delivery) ★★★★ Project understanding: You are looking for a WHMCS dev to complete 21 fixed-scope tasks, quoted per task, with selection based on total cost + experience. Work includes billing logic, hooks, client area, email templates, API integrations and strict “done when” criteria using agentic tools like Opencode/Claudecode. Services mentioned here based on project details ⚜ WHMCS module dev (billing logic, hooks, automation) ⚜ Client/admin area customization with secure PHP/MySQL ⚜ API integrations & external service connectivity ⚜ Email templates & workflow customization ⚜ Payment/invoice logic improvements ⚜ Performance tuning & clean architecture fixes ⚜ Agentic coding workflow (Opencode/ClaudeCode based delivery) I have strong exp in WHMCS, PHP, API and hosting systems, done billing + automation work before. I will review full task pack first, then execute using agentic coding setup, deliver in structured batches with testing and Git commits, ensuring each “done when” is fully met (little typo in comms sometimes but clean code). My quote: approx €18 per task (full pack competitive), timeline 7–10 days for all 21 tasks. Let’s discuss if you want fast structured delivery and long-term WHMCS support. Warm Regards, Farhin B.

@Tanmoy236

Greetings! I specialise in WHMCS development and customisation, with over 9 years of experience building billing logic, hooks, client area modifications, email templates, and API integrations using agentic coding tools for efficient, accurate delivery. Here's how I can help: - Complete all 21 tasks to strict acceptance criteria across billing logic, WHMCS hooks, client area customisation, email templates, and API integrations — every deliverable verified against your "Done when" specifications - Use parallel agentic coding tools including Claude Code throughout the entire project — fully compliant with your mandatory development requirement and significantly accelerating delivery across the full task pack - Apply deep WHMCS architecture knowledge including module development, hook points, API calls, and database interactions to ensure every task integrates cleanly without conflicts - Deliver all 21 tasks within a competitive timeline with clear per-task progress tracking so you always know exactly where the project stands I have reviewed the task pack link and am ready to submit a detailed per-task price breakdown with a competitive total project cost. Could you confirm the pack is currently accessible with the provided password, as I want to ensure I am quoting against the complete and final task specifications before submitting my full breakdown and total project quote?

@AZTURK1

Hi there, I reviewed the WHMCS Role Pack and the 21 task acceptance criteria (billing logic, hooks, client area, API integrations). I will deliver using agentic parallel coding tools (OpenCode/Claudecode flows) as required and apply my WHMCS and PHP automation experience to ensure reproducible outputs. - Deliverable 1: Implement and test each WHMCS hook/module change for all 21 tasks with commit-tagged Git branches and automated unit/integration runs - Deliverable 2: Provide configured email templates, API integration endpoints, and DB migration scripts (MySQL) for each task - Deliverable 3: Produce CI pipeline artifacts from agentic tools and deployment runbook - Risk/Quality control: staged deployment + backup checkpoint and post-fix validation for each task Skills: ✅ WHMCS ✅ PHP ✅ MySQL ✅ Hooks & API integrations ✅ CI/CD, containerized deployment ✅ Automated agentic coding (OpenCode/Claude) Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I am available immediately; Do you want me to run the agentic toolchains directly against your staging server or deliver tested code and CI artifacts for you to deploy? Best regards,

@ashinnd84

Hello there, we are a team of Full Stack Web and Mobile App Developers. Please, send me a message to discuss the work and finish in no time. Thanks Ashish Kumar.

@webnsoftindia

--- WHMCS Development – Full 21-Task Batch Implementation (Agentic Coding Workflow) --- Experienced WHMCS developer available to execute all 21 tasks using agentic development tools (Opencode/Claude Code or equivalent) as required. Key Features: Billing logic customization, hooks development, client area enhancements, email template automation, and API integrations with strict “Done When” criteria compliance. Total Project Price: $650 (fixed for full 21-task pack, optimized for bulk delivery efficiency). Timeline: 8–10 days for complete delivery including testing and refinements. Thanks

@AnumFatima210

Hello, I came across your project WHMCS Developer, 21 Tasks Public Tender (Per-Task Quotation) -- 2 and I am very interested in working with you. I have reviewed your requirements and fully understand the scope and expectations. I specialize in PHP, Website Design, MySQL, HTML, Agile Development, Software Development, Web Development, API and have successfully delivered similar projects before. I am committed to delivering high-quality work with reliability, clarity, and professionalism. I work transparently throughout the project so progress, deadlines, and expectations stay clear at every stage. I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Regards, Anum

@techsty2014

Interesting project, I will work the 21-task pack using Claude Code for parallel agentic execution as required, scaffold the module/hook structure once, then iterate tasks concurrently against your acceptance criteria. Quote per-task + total once I review the full pack. One angle: parallel agents stub all 21 WHMCS modules in hours, then run task changes concurrently. Without agentic tooling, 21 sequential WHMCS tasks burn weeks. With it, the bottleneck shifts from coding speed to QA against the "Done when" criteria, which is exactly where you want it. Questions: 1) Total budget cap, or lowest-bid-wins regardless? 2) Acceptance: automated tests or manual review? 3) WHMCS version (8.x) and PHP target? Looking forward to your response. Best regards, Faizan

@markupdudes

Hi, I have carefully reviewed your public tender for WHMCS development involving 21 detailed tasks. With extensive experience exceeding 10 years on Upwork and a strong track record in PHP and WHMCS customizations, I am confident in delivering high-quality work using parallel agentic coding tools like Opencode or Claudecode to ensure efficiency and adherence to your strict acceptance criteria. I will provide relevant WHMCS code samples and GitHub links demonstrating my expertise in billing logic, hooks, API integrations, and client area customizations. I understand that price is the primary factor, and I will offer a competitive total price for all 21 tasks. I estimate completing all tasks within 10 days, ensuring clear communication throughout. I look forward to contributing to your project with precision and speed. Could you clarify if any of the 21 tasks have dependencies that might affect the sequential or parallel development process? Best regards,

@mayankinnovative

Hi, As per my understanding: You have a structured WHMCS development tender with 21 predefined tasks, strict “done when” criteria, and a selection model primarily based on lowest total cost plus verified experience. You also require the use of agentic coding tools (like Opencode/Claudecode) instead of traditional workflows. Implementation approach: I will review the full task pack and break down each task into atomic deliverables, estimating effort per task and optimizing execution using agentic coding tools for speed and consistency. Each module (billing logic, hooks, client area, email templates, API integrations) will be developed and validated against acceptance criteria in parallel streams to reduce total timeline. Code will follow WHMCS standards with clean hooks, modular structure, and full compatibility. Testing will be done per task to ensure “done when” compliance before final delivery of the complete pack. A few quick questions: 1. Should deployment/testing be done on your WHMCS instance or local/staging? 2. Any WHMCS version constraints we must adhere to? 3. Do you require documentation per task or a combined final doc? 4. Will API credentials be provided upfront for integration tasks? 5. Any deadline expectation for full completion? I can share relevant WHMCS hook/module samples during discussion.