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By Lumexo
Lumexo is a non-custodial financial platform built on Stellar that provides users with direct access to on-chain financial services, including asset management, trading, fiat on-ramps, and DeFi integrations.
This submission focuses on expanding Lumexo with a native mobile application that allows users to interact with the Stellar ecosystem directly from their mobile devices.
The mobile application will support both wallet creation and wallet connection, enabling users to securely access their accounts through a non-custodial wallet model where users retain control of their private keys.
Core wallet functionality will include viewing balances, sending and receiving assets, and accessing transaction history.
The application will also provide access to asset markets and token swaps within the Stellar ecosystem.
In addition, the wallet will integrate lending functionality through Blend, allowing users to access DeFi services directly from the application.
A fiat on-ramp will also be integrated through Mercuryo, enabling users to purchase crypto assets and fund their wallets directly from the mobile app.
The goal of this development is to simplify access to Stellar wallets, assets, and DeFi services through a secure and easy-to-use mobile application.
$140.0K
Lumexo was first publicly announced in July 2025 and has been under continuous development since then.
The web application officially launched on September 29, and the product has continued receiving improvements and updates since launch.
Current product usage based on internal logs:
600+ unique accounts connected to the web application
~1000 on-chain transactions executed through the app
10 fiat on-ramp transactions processed through Transak ($1000+ worth of XLM)
Website and application traffic analytics based on Cloudflare and Google Analytics reports:
~1,700 new users in the last 90 days
~11,800 total page views in the last 30 days
~10,000 page views on the Lumexo web app
Over 60% of Lumexo users access the platform from mobile devices, demonstrating clear demand for a native mobile application
Users accessed Lumexo from multiple global regions including the United States, Europe, and Asia.
Since the previous SCF application we have expanded integrations within the Stellar ecosystem:
Blend partnership and integration completed
Fiat on-ramp implemented through Transak
Lumexo has built an organically growing community since August 2025:
6,300+ followers on X, grown organically since August 2025 (~4M organic impressions)
240+ Discord members
373+ Telegram members
150+ blog posts published on the Lumexo blog covering product updates and Stellar ecosystem topics.
To support the long-term development of the project:
The operating company behind Lumexo has been incorporated in Estonia.
The Lumexo trademark has been registered with EUIPO
Supporting analytics, dashboards and verification links are available in the following document:
https://docs.google.com/document/d/1fk9GrMdX1xPcM96s7yomFy28DwG_pgPT1h7Gio807Cc/edit?usp=sharing
The document contains:
Cloudflare analytics
Google Analytics data
X analytics
Product links
Community links
Additional screenshots and supporting evidence.
The objective of this tranche is to build the first functional version of the Lumexo mobile wallet on React Native. This phase covers the complete core wallet experience: secure key management, WalletConnect compatibility via Stellar Wallets Kit, asset management, and core transaction flows.
Brief description: Build the core wallet infrastructure for the Lumexo React Native application and integrate Stellar Wallets Kit to enable Lumexo to function as a WalletConnect-compatible wallet, allowing users to connect their Lumexo mobile wallet to Stellar dApps and sign transactions directly from the mobile interface.
The deliverable covers two components:
Component 1 — Lumexo Native Wallet: Users can create a new Stellar wallet directly in the app. The 12-word mnemonic is generated client-side, encrypted locally using a password provided by the user, and never transmitted. Users can also import an existing wallet via secret key or seed phrase, which is equally encrypted on-device using the provided password. Transaction signing happens fully on-device.
Component 2 — Stellar Wallets Kit WalletConnect Integration: Lumexo integrates Stellar Wallets Kit to support WalletConnect, enabling users to connect their Lumexo wallet to Stellar dApps. When a dApp requests a transaction signature, the request appears in the Lumexo mobile interface where the user approves or rejects it. Lumexo acts as the signing authority throughout.
How to measure completion:
Users can create a native Lumexo wallet with encrypted local key storage on both iOS and Android
Users can import an existing wallet via secret key or 12-word seed phrase
Stellar Wallets Kit WalletConnect module integrated and functional in React Native
Lumexo mobile wallet connectable to a Stellar dApp via WalletConnect
Transaction signing request appears in Lumexo mobile interface and can be approved or rejected
Signed transaction successfully submitted to Stellar testnet
Screen recording demonstrating wallet creation and WalletConnect signing flow on testnet
Budget: $22,000
Utilization: Mobile application setup in React Native (built from scratch, no code shared with the existing web application), complete non-custodial key management system with hardware-backed storage, WalletConnect integration via Stellar Wallets Kit adapted for React Native, UI/UX design, development, and QA on both iOS and Android.
Brief description: Design and implement the mobile UI/UX for the core wallet experience, alongside the development of a new dedicated mobile backend built to support optimized API response times, real-time data delivery, and mobile push notification support. Key screens include dashboard with total balance and 24h change, asset list with prices and metadata, send flow with asset selection/recipient/amount/memo/confirmation steps, receive flow with QR code and address copy, and transaction history with filters — all connected to Stellar testnet.
How to measure completion:
Dashboard showing total balance, 24h change, and asset breakdown functional on both iOS and Android
Send flow complete: asset selection, recipient address, amount, memo, and confirmation screen
Receive flow complete: wallet address display, one-tap copy, and QR code generation
Transaction history visible with pagination and type filters (Received, Sent, Pending, Orders)
All transactions successfully submitted and confirmed on Stellar testnet
Screen recording demonstrating all wallet flows functional on Stellar testnet
Budget: $20,000
Utilization: UI/UX design, frontend development and full implementation across all core wallet screens and functionality, new dedicated Go mobile backend (FCM push notifications, real-time data delivery, mobile-optimized API endpoints), infrastructure costs, and QA on both iOS and Android.
Total Tranche 1 Budget: $42,000 Estimated completion: 6 weeks from award
The objective of this tranche is to expand the Lumexo mobile wallet by integrating core Stellar ecosystem services directly into the mobile application. This phase focuses on integrating Blend lending protocol via its Soroban smart contracts, SDEX swap functionality, market data, and native Stellar liquidity pools.
Brief description: Integrate the Blend lending protocol into the Lumexo mobile application by connecting directly to Blend's Soroban smart contracts. All user actions — supply, borrow, backstop — are executed by invoking Blend's Soroban contracts directly from the mobile interface, with transactions signed on-device. The integration covers four main sections: Market, Dashboard, Backstop, and Web Application Improvements. The improvements built as part of this deliverable will also benefit the existing Lumexo web application.
Market — Users can browse all active Blend pools with key metrics including Total Supplied, Total Borrowed, Total Backstop, and APY. Users can supply and borrow assets from individual pools, with per-asset details showing APY, supplied amount, borrowed amount, and collateral ratio.
Dashboard — Users can monitor their personal lending positions across all pools, including total supplied, total borrowed, backstop balance, and net APY. Individual asset positions are visible with supply and borrow actions available inline.
Backstop — Users can manage their backstop positions including LP balance, backstop deposit, deposit more, exit pool, deposit to backstop, queue withdrawal, and withdraw — all executed by invoking Blend's Soroban contracts, with transactions signed on-device.
Web Application Improvements — The Blend integration on the existing Lumexo web application will also receive improvements as part of this deliverable, including: refined pool visibility and consistency across all views (Market, Dashboard, Backstop), pool status indicators (Active, On-Ice, Frozen) with warning banners for suspended pools, borrow capacity display, liquidation risk warnings, DeFi risk disclosures with terms acceptance on first Blend interaction, and UI/UX upgrades to improve the overall user experience.
How to measure completion:
Blend Market view displays all active pools with correct metrics on Stellar testnet
Users can supply assets to a Blend lending pool through the mobile interface
Users can borrow assets from a Blend lending pool through the mobile interface
Lending positions and balances visible in the Dashboard section
Backstop module functional: deposit, exit pool, queue withdrawal, and withdraw flows working
All Blend transactions successfully executed by invoking Blend Soroban contracts on Stellar testnet
Screen recording demonstrating supply, borrow, and backstop flows on Stellar testnet
Pool status indicators and warning banners visible on the Lumexo web application
Consistent pool visibility across Market, Dashboard, and Backstop views on the Lumexo web application
DeFi risk disclosures and terms acceptance implemented on the Lumexo web application
Budget: $30,000
Utilization: Full Blend Protocol integration built from scratch in React Native (Market, Dashboard, Backstop), web application improvements, and QA on both iOS and Android.
Brief description: Implement SDEX swap functionality, the full market experience, and native Stellar liquidity pool management into the Lumexo mobile application.
Swap — Users can swap any Stellar asset pair through the SDEX directly from the mobile interface, with live price preview, asset selector, and transaction confirmation before submission.
Market — Full market view with Hot Coins, Top Gainers, and Top Volume tabs. Asset list displays price, 24h change, liquidity, holders, volume, and market cap. Individual asset detail pages show token metadata, issuer address, about section, and asset status flags (revocable, clawback, immutable), with direct actions to swap or trade from the asset page.
Liquidity Pools — Users can browse all native Stellar liquidity pools with Total TVL, 24h Volume, Total Pools, and APY overview. Pool cards show TVL, 24h volume, holders, and APY per pair. Individual pool pages allow users to add liquidity, remove liquidity, view pool reserves, wallet LP share balance, and pool rewards APY. Users can also create new native Stellar liquidity pools directly from the mobile interface.
How to measure completion:
Users can swap Stellar assets through the mobile interface on Stellar testnet
Swap transactions successfully submitted and confirmed on Stellar testnet
Market view displays asset list with all metadata and correct price data
Asset detail page shows token info, issuer, asset status, and direct swap action
Liquidity Pools view displays all pools with correct TVL, APY, and volume data
Users can add and remove liquidity from an existing pool on Stellar testnet
Users can create a new native Stellar liquidity pool on Stellar testnet
Screen recording demonstrating swap, liquidity add/remove, and pool creation on Stellar testnet
Budget: $12,000
Utilization: Full implementation of SDEX swap, market data screens, and native Stellar liquidity pool management for the React Native mobile application, and QA on both iOS and Android.
Total Tranche 2 Budget: $42,000 Estimated completion: 6 weeks from the completion of Tranche 1
The objective of this tranche is to bring the Lumexo mobile wallet to Stellar mainnet, integrate Mercuryo's fiat on-ramp solution, and deploy the full production infrastructure required to support real users. This phase marks the public launch of the Lumexo mobile application on both iOS and Android.
Brief description: Integrate Mercuryo's fiat on-ramp solution into the Lumexo mobile application, enabling users to purchase cryptocurrency using fiat payment methods directly inside the mobile wallet. The integration includes embedding Mercuryo's SDK into the React Native application, implementing the required KYC flow, and supporting transaction flows for purchasing XLM and other supported Stellar assets directly into the user's Lumexo wallet.
How to measure completion:
Mercuryo SDK successfully integrated into the Lumexo React Native application
Users can purchase XLM and supported Stellar assets using fiat payment methods through the mobile interface
KYC flow embedded and functional within the mobile application
Transactions successfully processed through Mercuryo infrastructure
On-ramp flow tested and validated within the mobile application on mainnet
Screen recording demonstrating a complete fiat to crypto purchase flow on mainnet
The budget includes a mandatory third-party integration fee required by Mercuryo to enable the on-ramp service for the Lumexo platform, alongside development costs for embedding the SDK, implementing the KYC flow, and building the transaction flows within the mobile application.
The mobile application will use Mercuryo for fiat on-ramp functionality, as required for SCF-funded projects, alongside the current Transak integration on the web platform
Budget: $26,000 (includes $10,000 mandatory Mercuryo third-party integration fee + $16,000 development)
Utilization: Mercuryo SDK integration into React Native, KYC flow implementation, fiat-to-crypto transaction flows, UI/UX design, and QA on both iOS and Android.
Brief description: Deploy the Lumexo mobile wallet to Stellar mainnet and build the production infrastructure required to support live users. This includes final production build preparation, app store submissions for both iOS and Android, backend infrastructure configuration for mainnet operations, and implementation of monitoring, logging, and alerting systems to ensure reliable wallet operations in production.
How to measure completion:
Lumexo mobile wallet successfully deployed and connected to Stellar mainnet
Application submitted and approved on both Apple App Store and Google Play Store
All wallet operations — create, import, send, receive, swap, Blend lending, liquidity pools, and Mercuryo on-ramp — functioning reliably on Stellar mainnet
Backend production infrastructure operational with monitoring and logging implemented
Monitoring and alerting systems active for critical wallet operations
At least 500 real users complete wallet creation and execute transactions on Stellar mainnet after launch
Screen recording demonstrating complete end-to-end wallet functionality on Stellar mainnet
Budget: $30,000
Utilization: Mainnet migration and full regression testing across all wallet operations, production build preparation and app store submissions for iOS and Android, backend infrastructure configuration for mainnet, security hardening, production monitoring and alerting, UX refinements based on testnet feedback, and QA on both iOS and Android.
Total Tranche 3 Budget: $56,000 — Estimated completion: 6 weeks from the completion of Tranche 2
dSerban — Co-Founder
Entrepreneur with a background in finance and economics, experienced in developing and supporting technology-driven initiatives. dSerban focuses on strategic thinking, sustainable financial concepts, and identifying opportunities within the evolving digital economy.
Osid — Co-Founder
Experienced developer with a strong background in building efficient and reliable systems. Osid specializes in software architecture, performance optimization, and solving complex technical challenges, with extensive hands-on experience in blockchain and distributed technologies.
Invictus — Senior Developer
Senior developer and infrastructure engineer with a mastery of backend architecture and mobile app development. Fluent in Python, JavaScript, and Go, Invictus combines deep software engineering expertise with blockchain experience to design robust systems, optimize performance, and build highly scalable, complex technical solutions.
Moses — Community Manager
Community manager with solid experience in crypto and DeFi ecosystems. Moses focuses on community growth, user engagement, and effective communication, helping cultivate an informed and active community around emerging financial technologies.
Katruzzy — Community Manager
Community manager with strong experience in crypto and DeFi communities. Katruzzy focuses on user support, community engagement, and maintaining open communication channels while helping build trust and long-term participation within the ecosystem.
Their dedication and shared vision have brought together collaborators and contributors from different fields, creating a balanced mix of technical expertise, strategic thinking, and community insight. This combination of perspectives helps ensure that the project evolves in a way that remains practical, transparent, and aligned with real user needs.
dSerban
By Lumexo
Lumexo Native App