Android Payment App Development

@corpmember29

Hello!! {{{ I HAVE EXPERIENCE DEVELOPING NATIVE ANDROID PAYMENT INTEGRATIONS, NFC, SECURE API COMMUNICATION & POS SYSTEMS BEFORE AND I CAN SHOW YOU }}} I have carefully reviewed your requirements and understand the architecture between the Odoo POS PWA and the native Android payment application. I can build the native Android app with SumUp Tap to Pay SDK, secure device provisioning, terminal identity management, encrypted token storage, authenticated Odoo server communication and controlled SDK lifecycle. The payment flow will keep the amount authoritative on the server. The transaction ID will be passed through the intent, while the app securely fetches and validates the amount, converts it to minor units using BigDecimal, executes the NFC payment and reports the final outcome back to the backend. Deliverables will include the production Android application, attestation-compliant release build, unit tests for the payment flow, technical documentation, IT provisioning procedure and pilot support. I have 11+ years of programming experience and can handle the complete implementation with security, reliability and maintainability as priorities. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. Thanks, Christina

@ciss26

Hello there, Hope you are doing well I’m interested in building your native Android Tap to Pay application with SumUp SDK integration and the secure Odoo PWA → Android app → backend payment flow you described. The architecture is well defined, particularly the decision to treat the Odoo server as the authoritative source for transaction amounts rather than trusting values passed through the Android intent. I can implement this flow with security, reliability and auditability as the priorities. Proposed Implementation 1. Device Provisioning & Terminal Identity Secure one-time device binding Encrypted storage for terminal/device credentials Terminal status and guarded deprovisioning Correct SDK lifecycle management Non-blocking token provider with proactive refresh 2. Secure Request Validation Validate and authenticate the incoming transaction identifier Verify the caller/signature as required Fetch the authoritative transaction amount from the Odoo backend Use BigDecimal for accurate currency conversion to minor units Ensure the amount is never trusted from the intent 3. SumUp Payment Flow Initialize the SumUp Tap to Pay SDK correctly Handle SDK event streams Drive contactless-card and PIN flows Provide clear operator-facing status/error messages Support different currencies/locales through configuration Thanks & Regards Dheeraj K.

@Rajoriadares

Hello Client, Greeting of the day!!!! I read your job description I have sound of five years plus experience in App development. I have been DEVELOPED 35+ Apps, three taxi apps, Two socials apps and restaurant apps based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks Sr. Mobile Developer 

@Jennycreation

Hello there! My name is Priyanka and I lead an expert team of developers with 17+ years of Android, web, and window development experience. Your project description aligns perfectly with our specialty. We have extensive knowledge in Android App Development using Java, which is crucial for embedding SumUp's Tap to Pay SDK into your application. I'm confident we can seamlessly integrate your required functionalities and deliver top-tier code quality. One thing that sets us apart is our proficiency with dealing with complex interactions between different applications on the same device. We fully recognize that a Progressive Web Application cannot receive an Android activity result, such as what you will be using for the Odoo POS and your new payment app. Rest assured, we can effortlessly manage the intent handling, transaction identifier passing, and data fetching required by your project, guaranteeing smooth interaction between both apps. Moreover, protecting sensitive information is of utmost importance in payment-oriented applications. To address this,

@mehboobkatiyar

Hi, The architecture makes sense, especially keeping the **amount authoritative on Odoo rather than trusting anything passed through the intent**. I’d preserve that boundary and treat the Android app strictly as a secure payment terminal. I’d build this natively in **Kotlin**, with SumUp Tap to Pay/NFC integrated around a single SDK lifecycle. The areas I’d be particularly careful with are **caller signature validation, idempotent outcome reporting, token refresh, and crash/network recovery**. For payment results, I’d persist them locally before reporting to Odoo and retry until acknowledged, so a successful card charge can’t disappear because connectivity drops immediately afterward. The pilot should also include redacted diagnostics that let us trace a transaction without exposing card, token, or credential data. One question: is the **Odoo provisioning/payment API already implemented and documented**, or is the Android developer expected to define that contract as part of this scope? Regards, **Mehboob Katiyar**

@TechizeBuilder

Dear Client, I read "Android Payment App Development" carefully and understand you need a POS that keeps the counter moving quickly and never loses a sale. My hands-on experience with Java, Mobile App Development, Android, Odoo, Payment Gateway Integration, Android App Development, API Development aligns directly with what you need. I've built POS systems with barcode scanning, receipt printing, inventory sync, shift/cash management and sales reports — including offline mode so billing never stops. A few quick questions to get us started: 1. Is this for retail, restaurant, or another business type? 2. Which hardware should it work with — receipt printer, barcode scanner, cash drawer? 3. Do you need offline mode with automatic sync when the internet returns? Thanks & Regards, Deepak

@KarthikTechCon

Hi, I'm Karthik, with over 15 years of experience in Android app development. I understand your need for a native Android payment app that integrates with SumUp's Tap to Pay SDK, transforming a sales phone into a card terminal. My approach involves creating a seamless connection between your Odoo POS and the payment app, ensuring secure transaction handling without exposing sensitive data. I will ensure the app handles provisioning, SDK lifecycle management, payment execution, and outcome reporting, as specified. Deliverables will include a production-ready application, an attestation-compliant build, comprehensive unit tests, and a clear technical readme. I focus on market neutrality, allowing for currency and locale customization. Additionally, I will provide support during the pilot phase to guarantee smooth operations. I am confident in delivering a high-quality solution within your budget of ₹95,000. Let’s discuss how we can move forward. Looking forward to your response! Best, Karthik

@technologiesit

As a Full Stack Developer and an experienced Odoo developer, I'm Vimal Kumar, and I'm a perfect fit for your Android Payment app that integrates with the Odoo POS system. With over 8 years of experience in API Development, Java, and mobile app development, I have the expertise in building complex systems that involve data interchanges between separate applications. I understand the intricacies of working within the limitations of a progressive web app (PWA) and with SumUp's Tap to Pay SDK. Handling seven areas of work you've specified is well within my wheelhouse: from provisioning and terminal identity to payment execution, transaction UI, and outcome reporting. My deep understanding of software architecture combined with my Java proficiency will ensure efficient communication between Odoo POS and the payment app, eliminating any possible discrepancies in transaction amounts. I pride myself on my commitment to clean code, security, scalability, and on-time delivery. Working closely with me means not only receiving a robust production application but a comprehensive list of deliverables like unit tests, technical readme, and clear procedural documentation to make life easier for your IT operations team. Moreover, I provide reliable long-term support after project completion to further solidify your payment solution.

@santoshkumars17

With my 5+ years of experience in API development, mobile app development, and payment gateway integration, I am confident that I can deliver an exceptional Android Payment App for your project. I understand the intricacies involved between the Odoo POS and the native Android app, proficient at creating robust, reliable solutions that flow seamlessly. Having worked with various technologies including React Native and Flutter for mobile app development, I can ensure a smooth integration of SumUp's Tap to Pay SDK into your system; performing NFC card reader functionalities directly on the sales phone through ingeniously crafted interfaces. Additionally, from provisioning to diagnostics, I possess valuable skills and experience in fulfilling each of the seven areas of work you've outlined. I am accustomed to handling complex projects with high accuracy, efficiency and I prioritize clean code for ease of maintenance. Lastly, my dedication to on-time delivery and constant communication make me an ideal choice. Let's turn your idea into a functional reality together.

@sparkbrains

Hi, I can build this Android Tap-to-Pay terminal application with a strong focus on payment security, transaction reliability, and clean Odoo integration. My approach is to use native Kotlin + the SumUp Tap to Pay SDK, with the Odoo PWA passing only the transaction ID via Intent. The app will independently fetch the authoritative amount from the authenticated backend, convert it safely to minor units, and execute the payment through the SDK. I will implement: Secure terminal provisioning, device binding and encrypted credentials Caller/request validation and secure amount handling SDK-driven card/PIN transaction flow with clear error handling Durable offline outcome queue with retry/acknowledgement Four distinct transaction outcomes and server-side POS reconciliation Configurable currency/locale handling Redacted diagnostics and batched uploads Unit tests, attestation-compliant release build, IT provisioning guide and technical documentation I will also ensure SDK initialization, token refresh, and lifecycle handling are non-blocking and production-safe. Timeline: 3–4 weeks for the production MVP and pilot readiness. Question: Do you already have the Odoo backend endpoint/API contract and SumUp merchant/developer credentials available? Warm Regards, Manu The price will be given after the final discussion!

@ambientinfotech

Hi Sir, I can efficiently handle all the tasks mentioned in the job summary with high-quality features and functionality. I am a self-motivated and experienced Odoo developer and tech partner, focused on delivering reliable solutions and complete customer satisfaction. I assure you of 100% quality work and timely delivery. Let’s connect to discuss further. Thanks, Deva

@fullstack0407

I read your job post, I am confident that I am the best fit for your Android Payment App Development project. My extensive skills in Android, mobile app development and API integrations match perfectly with the technical requirements and unique features your project demands. I have a comprehensive understanding of implementing diverse payment gateways into mobile applications, including renowned entities like PayPal and Stripe, which aligns seamlessly with embedding SumUp's Tap to Pay SDK into your app. Moreover, my experience in provisioning and terminal identity management ensures that the app will be both secure and user-friendly throughout the transaction process. Additionally, I have a proven track record in building progressive web apps, which gives me a unique perspective and problem-solving ability when it comes to this specific PWA-native app interaction scenario. My proficiency in Backend technologies like Node.js and Python further ensures that your backend service credentials are safeguarded during the device binding process. Along with delivering a productive application, I'll also provide a detailed technical readme along with support through the single-till pilot phase to ensure all aspects of your project is taken care of efficiently. Let's revolutionize your Odoo POS system together!

@tyronet2

You need the Android app to act as a trustworthy payment terminal while treating Odoo—not the launching PWA or device intent—as the authority for amount and transaction state. I’d build it natively in Kotlin using the SumUp Tap to Pay SDK, Coroutines/Flow, Room, WorkManager, Android Keystore, certificate-digest caller verification, and Play Integrity where supported. Provisioning will bind each approved device to a backend terminal record, while short-lived credentials and a non-blocking token provider prevent secrets from being embedded. Each request will fetch the amount from Odoo, convert currency safely with BigDecimal, enforce idempotency, drive the SDK event stream, and record success, decline, cancellation, and indeterminate outcomes separately. A durable outbox will retry signed result posts until acknowledged, without ever storing card data. Logs will redact tokens and payment details, and tests will cover amount conversion, replay protection, lifecycle recovery, and reporting. Which SumUp SDK version, launch market/currency, Odoo API contract, and pilot Android device model are already approved?

@ssquare489

Your server-authoritative payment design is the right foundation, especially the rule that the intent carries only a transaction ID and that every SDK outcome is persisted before delivery to Odoo. I’d preserve that boundary exactly and focus the Android app on reliable payment execution and recovery. I’d build this natively in Kotlin with a clear separation between provisioning, SumUp SDK lifecycle, request validation, payment state, and outcome delivery. My two priorities would be clean implementation and integrations: EncryptedSharedPreferences for the device token, caller package + signing-certificate verification, BigDecimal-only amount conversion, single SDK initialization, cached non-blocking AuthTokenProvider logic, and Room + WorkManager for the durable retry queue across restarts/reboots. That directly reduces the risk of duplicate charges or a successful payment being lost before Odoo acknowledges it. I’d also cover the four distinct outcomes exactly as specified, process-death restoration, attestation-aware operator errors, redacted diagnostics, market-neutral configuration, exhaustive payment-path tests, signed release builds, and the IT provisioning/readme handover. A relevant example is Restaurant POS Rescue, where I worked on a POS/payment integration layer around an existing operational system and legacy database constraints.

@TechWagger2026

With over 14 years of experience, I specialize in full-stack web and mobile development, making me a perfect fit for your Android Payment App project. I am proficient in key technologies like MERN/MEAN, HTML5, CSS, Bootstrap, JavaScript and most importantly Android, Java & API Development which are vital to successfully incorporate SumUp's Tap to Pay SDK into your Progressive Web App. One of the highlights of my career has been developing similar card terminal applications for various clients across different industries including eCommerce and Payment Gateways. I bring not just the technical expertise to apply the SumUp's SDK but also a deep understanding of payment security mechanisms and how to integrate with external APIs efficiently. Equipped with these past experiences and my demonstrated problem-solving abilities, I confidently assure you that I will be able to create an Android application using SumUp's Tap to Pay SDK that fits seamlessly into your Odoo POS and has both airtight security measures and an intuitive user interface. With me onboard, you can rest easy knowing your Android Payment App will be transformed into a seamless transaction processing powerhouse in no time at all. Let's chat further about how we can make this happen.

@softhunters

Hi, I can develop the native Android payment application integrating SumUp Tap to Pay SDK with your Odoo POS workflow, focusing on security, transaction reliability and clean separation between the PWA and payment app. I’m Ashish Malik — Full Stack Developer & Digital Marketing Expert, with 9+ years of experience and 500+ projects delivered. I can handle: ✅ Native Android + SumUp Tap to Pay SDK integration ✅ Secure device provisioning, terminal identity and encrypted tokens ✅ Intent validation using transaction ID while keeping the amount server-authoritative ✅ Authenticated Odoo API integration and minor-unit conversion ✅ Payment flow, PIN/card events and actionable error handling ✅ Durable local outcome queue with retry and server acknowledgement ✅ Configurable currency, locale and formatting ✅ Redacted diagnostics and batched reporting ✅ Unit tests, production build and technical documentation I’ll focus on SDK lifecycle, authentication, token refresh, transaction states and failure recovery to ensure reliable POS/payment synchronization even during connectivity issues. I can also handle the provisioning procedure and support the single-till pilot through deployment and validation. Available to start immediately with clearly defined development milestones. Best Regards, Ashish Malik Full Stack Developer & Digital Marketing Expert

@tyagi5011

With a solid background in Android App Development and over 6 years of experience, I believe I am the ideal candidate for your Android Payment App Development project. Having worked on diverse projects like e-commerce apps, video calling apps, and social media platforms, I have honed my skills to deliver robust, secure, and high-performing applications - qualities which are essential for your payment app. I understand the complexities and precise execution required in embedding third-party APIs like SumUp's SDK to ensure smooth card transactions. My proficiency in Mobile App Development means that I can address any potential hurdles and navigate through the process seamlessly. Moreover, my software architecture skills have enabled me to create intuitive user interfaces for enhanced user experience - something your project heavily relies on. Additionally, my expertise doesn't end at development; I take pride in delivering comprehensive solutions through attestation-compliant release builds, thorough unit testing, proper documentations, and by providing ongoing support post-launch. You'll be in safe hands as we work together to transform your vision into an exceptional Android Payment App. Let's connect and begin this exciting journey!

@tranquilai

Hi, I reviewed the attached SOW and understand that the scope is specifically the native Android payment application, not the Odoo POS or backend. We can deliver this for ₹1,20,000 within 13 days. Our approach: • Native Android with Kotlin 1.9+ • SumUp Tap to Pay on Android SDK integration • Device provisioning and terminal identity • Encrypted device-token storage • Secure SDK token lifecycle and background refresh • Intent validation with package + signing certificate verification • Server-side authoritative amount retrieval • BigDecimal minor-unit conversion with proper rounding • Payment execution and SDK event handling • PIN/card-present flows and actionable error mapping • Process-death/state restoration • Durable outcome queue with retry and acknowledgement • Correct handling of done, failed, cancelled and result-unknown/pending states • Market-neutral currency, locale and formatting • Redacted diagnostics and separate diagnostic upload • Unit tests for payment and amount-conversion paths • Attestation-compliant release build • Technical documentation and provisioning guide • Support through the single-till pilot We understand the critical requirement that an uncertain transaction must never be treated as a failure, and that payment outcomes must survive app restarts and device reboots. The acceptance criteria in the SOW will be followed against a physical NFC device and SumUp sandbox.

@chetanprajapat

A native Android application that turns the sales phone into a card terminal, embedding SumUp's Tap to Pay SDK to read contactless cards over NFC. No separate card reader. How it fits. Two applications on one device. The Odoo POS is a Progressive Web App, built separately, and launches this app when the operator selects the card payment method. How the flow works. A PWA cannot receive an Android activity result, so the two apps never exchange the outcome directly. The POS passes a transaction identifier by intent. The app fetches the authoritative amount from the Odoo server over its own authenticated call, runs the payment through the SDK, and posts the result back to the server — which then updates the payment line in the POS. The amount never travels in the intent, so nothing on the device can set the price. What it does. Seven areas of work: Provisioning and terminal identity — one-time device binding with backend service credentials, encrypted device token, terminal status screen, guarded deprovisioning SDK lifecycle and token supply — single initialisation, a non-blocking token provider, proactive background refresh Request validation and amount conversion — caller signature verification, payload fetch, BigDecimal conversion to minor units Payment execution and transaction UI — starting the transaction, driving present-card and PIN screens from the SDK event stream, mapping errors to actionable operator messages \\\