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I already have roughly 70 % of a mystery-box web app built with HTML, JavaScript, Java, and Node.js. I now need a developer who can complete the remaining core features so we can launch. Key tasks • Extend my existing custom authentication system so users can register or log in, then view a personal dashboard that shows their username, email, recent activity, and full transaction history. • Implement a secure deposit flow. Users must be able to load funds via credit/debit card and cryptocurrency; the balance should update instantly and be stored safely for play. • Build the probability logic for each box. For example, the “Apple” box might give an iPhone 17 at 0.1 %, lower-tier Apple accessories at various midsized odds, and an iPhone cable at 40 %. Every box needs configurable drop rates that can be edited from the backend and served accurately to the frontend. I will provide: – Current codebase and architecture overview – Existing UI components and database schema – Sample box data and probability tables Deliverables I expect: 1. Fully functional profile page integrated with the current UI 2. Deposit module wired to the payment gateways and our wallet logic 3. Provably fair, test-covered drop-rate engine, integrated end-to-end 4. Clean, well-commented code pushed to our private Git repository If you have solid Node.js experience, payment integration skills, and an eye for game-style probability mechanics, let’s discuss the timeline and your quote.
ID do Projeto: 40163849
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109 freelancers estão ofertando em média €506 EUR for esse trabalho

I have extensive experience in Java, JavaScript, HTML, Node.js, making me a perfect fit for the "Finalize Mystery Box Gambling Site" project. I am confident in my ability to complete the remaining core features efficiently and effectively. Once we discuss the full project scope, I am open to adjusting the budget to align with your needs. My priority is to deliver high-quality work within your budget and timeframe. Let's kick off this project and bring it to completion. Please review my 15-year-old profile to see the quality of work I have delivered over the years. Your satisfaction is my top priority, and I am ready to start working right away to showcase my dedication to this project. Looking forward to discussing the details with you.
€525 EUR em 10 dias
8,6
8,6

✅⚽Poker ♣Casino ♣Gambling ♣sports betting ♻Metamask ♻Blockchain Expert⚽✅ Hello I have reviewed your project requirements, and I can confidently say that I have the skills and experience necessary to complete this project with utmost proficiency. With over 9 years in the industry, I have successfully delivered more than 200 projects, many of which involved complex Laravel development. I have successfully developed and launched numerous online Mystery Box ,casino games, ranging from poker, blackjack, slots roulette, Limbo, Crash, Plinko, CSGO, sports bet, and more. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. I would love the opportunity to discuss how we can bring your vision for the site together with our range of skills and experiences. NOTE: Please ignore the budget for now, we will discuss over chat. Thanks & Regards Kajal
€750 EUR em 7 dias
8,1
8,1

Hello, thank you for the detailed brief. I’d be very glad to help you finish the remaining 30% of your mystery-box web app and get it launch-ready, while keeping the code clean, secure, and easy for your team to maintain. If you select me, I would first review your current architecture, database schema, and UI components, then extend your existing auth so users can register/login and see a dashboard with profile details, recent activity, and full transaction history. For the deposit flow, I can implement a secure card + crypto top-up process with proper validation, webhook handling, and reliable balance updates (including clear logging and safeguards against double-processing). For the box logic, I can build a backend-editable drop-rate engine with strong test coverage, deterministic rounding rules, and end-to-end integration so the frontend always receives accurate odds and results. From my past work, I’ve built production web systems with Node.js/JavaScript and databases (including an ERP-style project and eCommerce platforms), so I’m comfortable with transactional history, APIs, and maintainable backend logic.
€500 EUR em 7 dias
7,6
7,6

Hi, We’ve developed several web apps with custom user dashboards and payment integrations, including a product that handles credit card payments and crypto deposits. We also have extensive experience with web3 technologies, having built multiple products that utilize wallets and smart contracts. For your project, we can extend your existing authentication system to support multiple login methods, including social logins. We can also implement a secure deposit flow that updates user balances in real-time and integrates with your wallet logic. Let’s schedule a 10-minute introductory call to discuss your project in more detail and ensure I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best regards, Adil
€499,78 EUR em 7 dias
7,1
7,1

Hello, I’m a Node.js full-stack developer experienced in wallets, payment integration, and probability-based game mechanics. ✅I can complete your mystery-box app by: ⭕Extending auth & building a secure user dashboard with activity and transaction history ⭕Implementing card & crypto deposits with instant balance updates ⭕Building a provably fair, configurable drop-rate engine fully tested and integrated All code will be clean, documented, and pushed to your repo. After reviewing your current code, I can provide a timeline and quote to get you launch-ready. Best regards, Canws
€500 EUR em 7 dias
7,5
7,5

Hello, I'm Asma, Graphic Designer and Web Developer with 10 years of experience working with clients and agencies from around the world. Creative problem solver with a passion for creating visually appealing and user-friendly digital solutions. I love building luxurious brands and designing captivating visual identities. I've worked with clients in lifestyle, property, fashion, hospitality, and luxury sectors. 24/7 Support & Faster Response . #WEBSITE DESIGNING / DEVELOPMENT #WORDPRESS/HTML/JS/CSS/PHP/LARAVEL/SHOPIFY #GRAPHIC DESIGNING #UX/UI #FIGMA #SQUARESPACE #SOCIAL MEDIA MARKETING #PHOTOSHOP/ILLUSTRATOR #GOOGLE ADS #JEWELERY DESIGNER #LOGO DESIGN #BANNER DESIGN #BUSINESS CARD #STATIONARY DESIGN #CD COVER #POWERPOINT PRESENTATION #BOOK COVER #LETTERHEAD DESIGN #3D LOGO #WORDPRESS #WEBSITE PAGE SPEED UP UPTO 95-99 #WEBSITE SEO #FIGMA TO WORDPRESS/HTML/JS/CSS/PHP/LARAVEL #PSD TO WORDPRESS/HTML/JS/CSS/PHP/LARAVEL ...... ETC :)
€500 EUR em 3 dias
6,9
6,9

Hi there! ? I’m a Full-Stack Developer and Digital Solutions Expert with 12+ years of experience in Website Design, Web Development, Mobile App Development, AI Integration, Automation, and Digital Marketing. I have reviewed your project description and am confident in completing the remaining core features for your mystery-box gambling site to help you launch successfully. I specialize in Node.js development, payment integrations, and game-style probability mechanics, which align perfectly with your requirements. I will extend the custom authentication system, implement a secure deposit flow supporting credit/debit cards and cryptocurrency, and build the probability logic for each box with configurable drop rates. This will provide users with a personalized dashboard, secure fund loading, and an engaging gambling experience. Let's discuss the timeline and your quote to bring this project to life. What are your preferred milestones for completion?
€570 EUR em 6 dias
6,9
6,9

Hi there, I’ve reviewed your 70% complete mystery-box app and I’m confident I can finish the core features for a secure, scalable launch. With Node.js backend experience, payment integration (cards and crypto), and a game-style probability engine, I will: - Extend authentication to a full profile with username, email, recent activity, and full transaction history. - Implement a secure deposit flow with card and crypto gateways, instant balance updates, and safe persistence. - Build a configurable drop-rate engine for each box with backend-editable odds, provably fair results, and end‑to‑end test coverage. - Deliver clean, well-commented code to your private Git repo, plus tests for wallet flows, deposits, and drop logic. Deliverables align with your list: 1) profile page, 2) deposit module, 3) provably fair engine, 4) clean code with tests. Timeline: about 14–21 days, depending on gateway choices. Budget: 600 EUR. Next steps: confirm gateway preferences (cards and crypto) and any KYC/AML needs; I’ll set up a staging environment and deliver a 1st milestone by day 7. Best regards,
€250 EUR em 7 dias
6,5
6,5

Hello, I am a Web Developer with 15+ years of experience, specializing in building simple to complex websites, e-commerce, membership, and portal systems. I always deliver top-quality work and ensure client satisfaction. My core expertise is in Angular development, where I create scalable, secure, and high-performing web applications with clean architecture and responsive UI. I recently worked on OpenAI API integration for auto-generated articles, images, and social sharing, showing my ability to adopt the latest technologies. If you are looking for a dedicated Angular expert who combines experience with innovation, I’d be glad to work on your project.
€250 EUR em 7 dias
6,3
6,3

Hello alyxoukos, We went through your project description and it seems like our team is a great fit for this job. We are an expert team which have many years of experience on Java, JavaScript, iPhone, HTML, Node.js, Game Development, Web Development, Backend Development, Frontend Development, Database Management Lets connect in chat so that We discuss further. Regards
€250 EUR em 7 dias
6,2
6,2

Hello, I understand you’re looking for an experienced developer to finalize and productionize your mystery box gambling web app by completing the remaining core systems and ensuring everything is secure, accurate, and launch-ready. I have strong hands-on experience with Node.js, JavaScript, Java-based backends, and game-style probability systems, and I’m comfortable stepping into existing codebases to extend functionality cleanly without breaking established architecture. For this project, I would integrate a complete user flow on top of your custom authentication system, including a secure profile dashboard showing user details, recent activity, and full transaction history. I would implement a robust deposit system supporting both card payments and cryptocurrency, ensuring balances update instantly and are stored safely. The probability engine would be built as a configurable, backend-driven module with precise drop rates, provably fair logic, and test coverage to guarantee accuracy and transparency for every box type. All work would follow clean coding standards, with clear comments and structured commits pushed to your private Git repository. The goal is to finalize the remaining 30% efficiently, align everything end-to-end, and deliver a stable, auditable system ready for launch and future scaling. Thanks Asif
€750 EUR em 5 dias
6,4
6,4

Hi, I can step in and finish the remaining 30% of your mystery-box web app by extending the existing codebase—no rewrites, just clean, secure completion so you can launch confidently. How I’ll handle each task Auth & Dashboard: Extend your custom auth to deliver a secure user dashboard showing profile data, activity logs, and full transaction history, integrated with your current UI and schema. Deposits: Implement a secure deposit flow for credit/debit cards and crypto, with instant balance updates, proper validation, and safe storage tied to your wallet logic. Probability Engine: Build a provably fair, configurable drop-rate system (per box, editable from backend), fully tested and accurately served to the frontend. What you’ll get Working profile/dashboard page End-to-end deposit module (cards + crypto) Tested, fair probability logic integrated across backend/frontend Clean, commented code pushed to your private Git repo I have strong Node.js experience, payment gateway integrations, and game-style probability mechanics. Once I review your repo and sample data, I can confirm timeline and a fixed quote. Ready to start when you are.
€250 EUR em 4 dias
6,2
6,2

I am Wahab, an experienced Unity Game Developer, AR/VR Specialist, and AWS DevOps expert with a knack for crafting immersive gaming experiences. Although my previous roles may not exactly align with web development(Key tasks of the project), my years of working in game development have honed my skill in JavaScript and Node.js to a great extent. Thus, ensuring a significant overlap between your project requirements and my technical competencies. Moreover, as an individual who firmly believes in pushing technological boundaries, I am perfectly suited to handle the task of integrating complex payment gateways seamlessly. My long-standing experience in deploying applications on AWS will further guarantee that this intricate deposit flow operation is handled securely and efficiently. Additionally, probability mechanics play an integral part in both game development and your mystery-box gambling site. Given my game design expertise, I bring an innate ability to construct and implement these systems accurately to ensure provably fair drop rates for each box. Working together would not only unite our shared vision for innovation but also guarantee clean and well-commented code throughout your project. So let's capitalize on the opportunity to embark on this journey together where I can contribute my experience with JavaScript and Node.js while expanding my knowledge base in web development to deliver excellent results for you.
€500 EUR em 7 dias
6,4
6,4

Hi I can complete and harden your mystery box platform so it is launch ready with secure user accounts deposits and provably fair box logic. I am comfortable stepping into an existing Node and JavaScript codebase and finishing core systems without rewriting what already works. I will extend your current authentication flow to support full user profiles with a clean dashboard showing account details activity and transaction history integrated into your existing UI. For payments I will implement a secure deposit system supporting cards and crypto with proper validation balance updates and safe wallet handling. For the mystery boxes I will build a configurable probability engine where drop rates are managed from the backend and delivered accurately to the frontend. The logic will be deterministic testable and auditable so odds are enforced exactly as defined. I will include clear tests and comments so the system remains transparent and maintainable. All work will be committed cleanly to your private repository and aligned with your current architecture so you can move straight into launch. Best, Justin
€500 EUR em 7 dias
5,8
5,8

As a seasoned web developer and a dedicated professional, I can confidently assure you that engaging my services would not only produce the desired results but also ensure an enjoyable process. My experience in backend and frontend development, particularly in Node.js, aligns seamlessly with the skillset required for your project. I have solid expertise in game-style probability mechanisms which is directly relevant to your need for configuring drop rates from the backend and serving them accurately to the frontend. Best Regards Harvinder
€266 EUR em 2 dias
6,0
6,0

Hi, You’re close to launch, but the hardest parts remain, secure auth, real-money deposits, and fair probability logic that won’t break under scrutiny. I can help you finish the remaining 30% cleanly and make the app production-ready without rewriting what already works. I have developed similar solutions completing partially built Node.js web apps involving custom authentication, user dashboards, wallet logic, and transaction-heavy flows. How I’d approach your core tasks: Extend your existing auth to support profile + activity + transaction history without breaking current sessions Implement card + crypto deposit flows with instant balance updates and secure wallet storage Build a provably fair, backend-driven drop-rate engine with configurable odds, test coverage, and deterministic outcomes served to the frontend Quick questions to clarify: Which payment providers are planned for cards and crypto? Do you want drop-rate configuration via an admin UI or config-only initially? If this aligns, share the repo and architecture overview and we can lock scope quickly. Sourabh
€500 EUR em 7 dias
6,2
6,2

✋ Hi there. I can complete and stabilize your mystery box site by finishing the core logic, payments, and user flow so it is ready for launch and real users. ✔️ I have solid experience working with Node.js, Java backends, custom auth systems, and game style web apps with balances and transactions. In a previous project, I finalized a loot box style platform with user dashboards, wallet history, and backend controlled drop rates, including testing to confirm odds matched the config. ✔️ For your project, I will extend your current auth flow to support full user profiles with dashboard data pulled from your existing database. I will integrate card and crypto deposits into your wallet logic so balances update instantly and safely, and fit cleanly into your current UI. ✔️ I will build a clear probability engine where each box has editable drop rates from the backend and reliable results on the frontend, with tests to verify fairness. The code will stay readable, commented, and pushed to your private repo as requested. Let’s chat to review your current codebase and agree on the next steps. Best regards, Mykhaylo
€500 EUR em 7 dias
5,5
5,5

Warm greetings! I specialize in completing and hardening partially built web apps, especially game-style platforms that combine wallets, payments, and probability-driven mechanics. With over 9 years of experience across Node.js, Java, JavaScript, and secure transaction systems, I focus on finishing strong—clean logic, safe funds handling, and launch-ready stability. Here's how I can help: * Extend your existing authentication to deliver a full user dashboard (profile data, activity logs, and complete transaction history) * Implement a secure deposit flow supporting credit/debit cards and crypto, wired directly into your wallet logic with instant balance updates * Build a provably fair, backend-driven drop-rate engine with configurable probabilities per box and test coverage * Integrate all features end-to-end with your current UI, database schema, and architecture * Push clean, well-documented code to your private Git repository for easy review and future scaling To scope this precisely, a few quick questions: which payment providers are you targeting for cards and crypto, do boxes require server-side seed/nonce logic for fairness verification, and is there a fixed launch deadline you’re aiming for?
€500 EUR em 7 dias
5,2
5,2

Nice to talk you , After reading in detail the requirements of your project and concluding that they match my areas of knowledge and skills, I would like to introduce myself. My name is Anthony Muñoz and I am the lead engineer for DS Pro IT agency. I have worked for over 10 years in Backend and software development and have successfully done multiple jobs. It will be a pleasure to work together to make your project a reality. Please feel free to contact me. I´m looking forward to working with you. I really appreciate your time and remain attentive to any request or question. Greetings
€902 EUR em 7 dias
5,7
5,7

I am Sumit Joshi from Sacesta Technologies. I will complete your app by hardening auth, implementing a compliant deposit flow, and delivering a provably fair drop rate engine with tests and clean Git history. Recommended stack • Keep Node.js plus Java, add a clear API contract and validation • Ledger based wallet storage with idempotent webhooks • Card payments via a PCI compliant provider and crypto via a compliant gateway, with audit logs Core build • Register and login updates plus a dashboard showing profile and full transaction history • Deposits with instant balance updates, retries, and failure handling • Drop tables managed in backend, accurate odds served to UI, provably fair verification for users Deliverables • Profile and dashboard integrated with your current UI • Deposit module wired end to end with logs and test coverage • Drop engine with unit and integration tests • Documented code pushed to your private repo Relevant work • Built payment and wallet style flows plus real time systems like FileChannels Question • Which providers are you using for cards and crypto, and do you need KYC or geo restrictions at launch? Regards, Sumit Joshi
€500 EUR em 7 dias
5,8
5,8

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