Lean Epay payment gateway

@shrec

Hi, I can help build the payment gateway with a strong focus on reliability and security across web, mobile, and POS. I have experience with backend/API development, payment integrations, authentication, encryption, and transaction workflows. I can structure the backend for cards, crypto, and bank transfers, provide clean APIs/SDK integration, and include 2FA, fraud controls, secure key management, transaction monitoring, and a lightweight admin dashboard. I’d be glad to review the expected payment flows and compliance requirements before getting started. Best, Ivane

@starttechno

I’d model the card, cryptocurrency, and bank-transfer flows behind one transaction API first, then expose the same status and webhook contract to web checkout, mobile SDKs, and POS terminals. This keeps reconciliation, refunds, key management, and audit logging consistent across every channel. I’ll build the PHP/JavaScript backend, 2FA, encrypted payment data, risk rules and transaction monitoring, plus a minimal admin dashboard for keys and reporting. The delivery will include integration-ready web/mobile/POS components, API documentation, sandbox test transactions for all three methods, and an audit-ready security setup in 7 days. Which POS terminal model should the first adapter target? Muhammad Saad

@installerpoint

As a seasoned Senior Full-Stack Engineer, I bring the deep technical expertise required to build your robust and secure payment gateway. My proficiencies with unprecedented languages like PHP (Laravel), Node.js and Python allow me to handle the expansive scope of this project confidently. Moreover, my abilities with REST & GraphQL APIs signal my knack for building efficient and scalable backends, just like you require. When it comes to handling sensitive user information securely, my skills as a Technical Architect come into play. Over the course of my 10+ years in the industry, I have developed a keen sense of security and compliance that is essential for your project- two-factor authentication, encryption, and fraud detection being some of the pillars. In addition to engineering proficiency, my commitment towards clear and concise communication ensure we are always on the same page to deliver the best possible output. The high-stress payment processing industry mandates diligent tracking of transactions;

@raphaelokekeze

Building a scalable back-end that unifies traditional credit cards, cryptocurrency, and bank transfers while maintaining sub-second processing and strict security is the trickiest part of this build. To tackle this, I will architect a modular API-driven structure in PHP and JavaScript that cleanly isolates each payment method while keeping transaction logging and fraud detection centralized. With over 15 years of experience building and securing web and software systems, I am well-equipped to deliver the robust security layer you require, including end-to-end encryption, two-factor authentication, and compliance reporting. I will ensure you walk away with clean API documentation and a minimal admin dashboard so you can easily track transactions and manage keys, allowing another developer to integrate within a few hours. Let's get this done. My bid is $120.67 for delivery in 1 days. Send a message to discuss the architecture and kick off the build.

@DeveloperStation

Hi, A payment gateway spanning cards, crypto, and bank transfers across web, mobile, and POS is really three integration surfaces sharing one secure core, so I'd build the transaction engine and key management first, then layer SDKs per platform. One question up front: for cards, do you want direct PCI scope on your side, or do we route through a provider like Stripe so most compliance stays off your servers? That choice changes the whole security and audit picture. We've built multi-currency payment flows and instant-win transaction handling on a competitions platform with fraud-resistant logic. DrawDash: provably fair competitions with multi-currency support. Given no history yet, we can start with a milestone on the back-end engine so you only release on working test transactions. Which payment method should we prove out first? Adil

@Herculesz

Hi, This project demands a secure, scalable backend capable of handling multiple payment types across web, mobile, and POS environments. The main engineering risk lies in integrating robust security measures like two-factor authentication and fraud detection seamlessly into transaction flows while maintaining compliance and performance. I typically design systems with clear separation between payment processing, security layers, and API management to ensure maintainability and auditability. Given the multi-platform SDK requirement, careful abstraction of platform-specific integrations is critical. I recommend separating the fraud detection logic into a modular service that can be updated independently and implementing end-to-end encryption with strict key management. Compliance reporting should be baked into transaction logs for traceability. Systems like this require rigorous testing on all platforms to validate transaction integrity and security before production rollout. I would first validate your POS environment requirements and compliance scope to tailor the architecture accordingly. Thanks, Hercules

@kamransiyal9

HI! I am an expert web programmer. I have a lot of work experience in Laravel, Codeigniter, PHP, Wordpress, JavaScript, HTML, Vuejs, Reactjs, React Native, and MySQL. I can start right away. I want to discuss this project in detail. Please contact me to discuss more regarding this project. For more details Chat with me

@AnumFatima210

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum

@codefusion53

Hi I can architect and build this as a modular multi-channel payment platform with a secure API layer supporting cards, bank transfers, and cryptocurrency across web, mobile, and POS environments. The backend would be designed around tokenized payment flows, provider adapters, webhooks, transaction state management, key management, audit logs, 2FA, encryption at rest/in transit, fraud scoring, retries, idempotency, and role-based admin access. I would also create reusable SDK/API components for web and mobile, plus a POS integration layer where terminal APIs permit it. Because card acquiring, banking rails, crypto settlement, PCI scope, KYC/AML, and POS certification depend heavily on country and chosen providers, I would first define the compliant architecture and integrate licensed processors rather than attempting to act as the regulated processor itself. Deliverables can include the scalable backend, admin dashboard, SDKs, API documentation, test environment, security controls, and end-to-end transaction testing for all supported methods. Best, Justin

@sufyanasmat38

Hello, I have experience building secure payment systems, REST APIs, web and mobile integrations, and transaction management platforms. I can develop a scalable gateway supporting cards, cryptocurrency, and bank transfers across web, mobile, and POS, with 2FA, encryption, fraud detection, secure key management, compliance-ready logging, and an admin dashboard. I’ll also provide clean API documentation, SDK integration, testing, and deployment support so developers can integrate quickly. I can start immediately and would be happy to discuss the required payment providers and POS integrations.

@denisSolution

Hi, I'm Denis, a full-stack developer specializing in payment processing systems and integration layers. I understand your project: building a unified payment gateway handling cards, crypto, and bank transfers across web, mobile, and POS with built-in security. The core challenge is architecting a backend that abstracts these payment methods into a single reliable API while providing clean SDKs and UI components. The key is designing around a transaction state machine that handles retries, reconciliation, and audit trails naturally. My approach: 1. Requirements review to clarify payment processors and crypto networks 2. Design core transaction engine and API structure 3. Build security layer with encryption, 2FA, and fraud detection 4. Implement SDKs for web and mobile, then POS integration 5. End-to-end testing across all payment methods and security audits Critical technical considerations include fraud detection scoring (real-time, velocity checks, ML signals) that doesn't block legitimate transactions, and ensuring crypto transaction finality is handled correctly. Main risks are third-party API limitations and crypto integration complexity—both manageable with clear specifications and thorough testing. I'm ready to start immediately. Let's discuss the details. Thanks, Denis.

@rbtech1984

Hello!! A secure, scalable payment gateway handling cards, cryptocurrency, and bank transfers across web, mobile, and POS with strong security is exactly what you need. * Which payment providers should be connected? * Which POS devices should be supported? * Do you already have the required compliance requirements? A unified backend, secure APIs, 2FA, encryption, fraud detection, transaction tracking, admin dashboard, SDK components, and clear documentation will be delivered with thorough testing. Relevant payment gateway and API projects have been completed before, with a strong focus on secure transactions and smooth integrations across platforms. Let us discuss your requirements in chat and get started. Best regards Farhin B

@toriquldev123

Hello There! I’m Md Toriqul Islam, an experienced full-stack developer specializing in secure payment systems, APIs, web/mobile integrations, authentication, encryption, and scalable backend architectures. I understand you need a production-ready payment gateway supporting cards, cryptocurrency, and bank transfers across web, mobile, and POS, with 2FA, encrypted transaction flows, fraud detection, compliance reporting, APIs, SDKs, and an admin dashboard. I am skilled in Node.js, TypeScript, REST APIs, secure authentication, encryption, payment integrations, webhooks, SDK development, and scalable databases. I have some questions: 1) Which CRM are you currently using, and do you already have the required API/integration credentials? 2) Do you have a preferred WordPress builder such as Elementor, Divi, or Gutenberg? 3) How many landing pages are you planning to build after the pilot page? I can build this with a modular API-first architecture and ensure each payment method and platform is thoroughly tested before production deployment. Looking forward to hearing from you. Best regards, Md Toriqul Islam

@bcosley

Hi, You're aiming for a payment gateway that handles cards, crypto, and bank transfers across web, mobile, and POS with strong security and auditability. I've worked on similar payment flows, focusing on end-to-end security, fraud controls, and developer-friendly docs. I'll start by validating the current flows, pinning the data model, and building a minimal core that routes three methods, then add adapters for web, mobile, and POS. Security and compliance reporting will be designed in from day one. One technical risk: crypto settlement and KYC across channels can create timing gaps and reconciliation work. Two clarification questions: What is the preferred key management and rotation policy for production keys across platforms and how should audits be captured? Do you want a single unified API with adapters for cards, crypto, and transfers, or separate APIs per method, and what's the rollout sequencing? If we're aligned, I can outline the implementation plan before we get started. Best regards, Brandon

@artiboria

As a seasoned web developer with over #nb# years of experience, I am confident that I have the necessary skills to deliver a robust, scalable, and secure payment gateway solution for your business. My expertise in PHP, Laravel, and WordPress is especially relevant to this project as they form the foundations of most secure and trusted payment gateways. I have built several high-converting websites and eCommerce platforms which have helped my clients achieve their business goals. My deep understanding of the latest security measures including the implementation of Two-factor authentication, end-to-end Encryption, and smart Fraud detection means that I can deliver a solution that is not only robust but keeps your customers' data safe at all times. Additionally, my vast experiences with payment gateway integrations across various platforms such as Shopify, WooCommerce, among others gives me unique insight into the intricacies of these systems. This will help me deliver a product that seamlessly drops into your web apps, native mobile apps, and POS terminals without sacrificing user experience or functionality. So let me maximize your Epay ambitions even further by choosing me for this task.

@sharmin283

In transforming your Lean Epay concept into reality, let me iterate my proficiency across a range of vital domains. With my proven ability to design and build solutions for complex systems, I am confident in crafting an agile and scalable back-end that can harmoniously handle Credit/Debit cards, Cryptocurrency, and Bank transfers across all intended channels. Leveraging my expertise includes not only providing robust security layers that embody Two-factor authentication, end-to-end Encryption, and smart Fraud detection but also ensuring compliance reporting is enabled, leaving no room for compromise. Beyond the back-end, I specialize in providing frictionless front-end or SDK components that drop into web apps, native mobile apps, and common POS terminals seamlessly. This ensures you receive an integrated system capable of functioning cohesively across multiple environments. Additionally, I'm fully skilled in crafting minimal admin dashboards with clean API documentation. This will enable you to stay on top of transactions while easily managing keys- a essential aspect of building trust with your customers.

@krupnovdenis

Hello! We can build a payment gateway for your web, mobile, and POS flows. 1. Do you already have a preferred payment processor or provider stack? 2. Which payment method should we prioritize for the first release? — About us We are dZENcode – a full-cycle IT company for digital product development: from design and programming to integrations and post-release support. We build projects from scratch and also work on existing solutions that need further development, improvements, or technical support. You can find detailed information about our services and rates on our official website: https://dzencode.com. Please review it – after that, we can discuss the details and agree on the next step. ⚠️ After clarifying all details, we will define the scope, the suitable cooperation format – task-based, outsourcing, or outstaffing – and the final cost. Projects are guaranteed to reach release with us: • 10+ years providing IT services; • 90+ in-house specialists; • 250+ public reviews since 2015; • We support products under SLA after launch; • We work under NDA and a company contract!

@Tanmoy236

Hi There! I specialize in secure payment API development, with 9+ years of experience building scalable transaction systems across web, mobile and POS environments. Your key challenge is making cards, crypto and bank transfers work reliably across three platforms without compromising security. I’ll architect the backend and APIs, integrate 2FA, encryption and fraud controls, provide web/mobile/POS SDK components, compliance-ready reporting, transaction admin and clear developer documentation, with end-to-end testing for each payment flow. Which payment providers or acquiring partners are you planning to use for cards, crypto and bank transfers?

@AndrewJSMAN

I've built multi-method payment processors before—Stripe integrations, crypto payment flows, and POS terminal connectivity—so this architecture is straightforward. I'll structure the backend on Node.js or PHP (depending on your existing stack) with isolated service layers for card processing, blockchain transaction handling, and bank transfer orchestration, then implement 2FA via TOTP/SMS, AES-256 encryption at rest and in transit, and rule-based fraud detection flagging velocity anomalies and geographic mismatches. The SDKs will be framework-agnostic—REST API with webhook support for web/mobile, native Android/iOS bindings, and a lightweight POS terminal module using socket communication. Admin dashboard pulls from a transaction ledger database with key rotation, compliance audit logs, and real-time settlement tracking. I'll validate everything end-to-end: test card charges, mock crypto confirmations, simulated bank ACH flows across all three platforms, then run security penetration testing and generate integration docs that let another developer wire it in a few hours. I can start immediately. Thanks, Andrii.