Stellar Build-A-Thon Kolkata is a 24-hour, in-person hackathon held in Kolkata, India, from January 24–25, 2026. The event takes place at Offbeat CCU and is focused on building real-world applications on the Stellar blockchain, including projects using Soroban smart contracts. Participants work in teams with access to technical workshops, live demos, and hands-on mentorship, developing use cases such as payments, DeFi, wallets, remittances, and on-chain utilities. The hackathon is supported by Rise In and includes prizes, ecosystem swag, and follow-on opportunities for top teams.