In Episode 4 of Stellar Dev Diaries, we present how a reliable and secure cross-border payment system is built in DeFi, and we accompany the Freelii team as they face the challenges of moving money at scale using blockchain.
In this episode, we review the technical design of Freelii's payment system and the key decisions to put it into production: how to handle real money, real users, and real risks; solving cross-border payments for influencer houses, remote teams, and digital businesses; why they chose Stellar for its speed, low fees, and anchor ecosystem; the use of policy signers to execute automated and secure transactions without user interaction; the difficulty of testing without a sandbox and how they combined testnet with their own tools; and the serverless backend architecture with Upstash queues to ensure reliable transaction execution.
Featured topics: risk management · international payments · policy signers and automation · testnet testing · serverless architecture · Upstash queues
If you are interested in building on Stellar, find developer documentation at https://developers.stellar.org and learn how to design systems that handle real money securely and scalably.
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At Q2BSTUDIO, we combine experience in custom development, Web3 and DeFi platform integration, and cybersecurity practices to support projects from idea to mainnet deployment. Our solutions include artificial intelligence consulting, implementation of AI agents to automate processes, and Power BI dashboards for visualization and reporting.
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Follow the Freelii team as they move toward the mainnet launch and check out Episode 4 to see how production systems that handle real money are launched and what best practices you can apply in your projects.
