Next-Gen Builders Harness Concordium’s Privacy-Preserving Tech

Concordium
November 3, 2025
At Encode London 2025, hackathon participants explored fresh ways to weave selective disclosure and payment logic into cutting-edge applications.

The Encode London 2025 Hackathon lit up Shoreditch, London, from 24 to 26 October in Shoreditch, London, gathering up to 300 innovators to shape the next wave of Web3 and AI applications.

As Gold Sponsor and long-term supporter of Encode since 2021, Concordium empowered dev teams to explore how verifiable identity, privacy, and accountability can coexist in real-world use cases without compromising user experience. 

With 4 challenge tracks, it was a hackathon that not only brought challenge to the developers, but also valuable feedback about Concordium tech – feedback that feeds directly into Concordium’s renewed focus on building its developer community, now a key priority for the chain's growth.

Building with Trust: A Concordium Workshop

As part of the event, Dragos Danciulescu, a Developer Relations Engineer, and Doris Benda, a Senior Engineer hosted a workshop titled “Intro to Concordium.” Participants learned the essentials of developing on Concordium, and where to find documentation to support their novel ideas.

Throughout the hackathon, Concordium’s booth buzzed with energy. The team provided ongoing mentorship and technical guidance to developers on how the Concordium ID layer and verify and pay features can make their solutions come to life, and on how to fulfill the requirements of Concordium challenges. Of course, there was also a steady supply of Redbull, branded water bottles, and t-shirts to keep builders going strong. 

Over 250 hackers committed to the challenges, and 19 teams submitted their solutions to our 4 Concordium tracks.

Solving Real-world Issues: Concordium Challenge Tracks

Contenders could choose from four Concordium-powered tracks combining verifiable identity with Protocol-Level Token (PLT) payments:

  1. Next-Gen E-Commerce Plugin — a Shopify or Magento extension verifying buyer age and enabling PLT-based checkouts.
  2. Location-Verified Payments for Businesses — geo-based settlements for logistics, gig work, and event services.
  3. Responsible Gambling Tools — privacy-preserving identity checks and spending limits for gaming platforms.
  4. Identity & PLT Integration — an open track inviting teams to embed Concordium features in any type of project.

Teams spent the weekend coding, testing, and refining their ideas – all racing toward a $15,000 prize pool including CCD rewards, Concordium-branded Ledger devices, and merch. 

And The Winners Are…

1st Place – Proctora

Proctora brought on-chain transparency to online exams by solving a major issue in digital education: identity fraud and data exposure. Using Concordium’s zero-knowledge proof verification, NFT vouchers, and blockchain certificates, the team built a fully verifiable system where students can prove their identity, register for exams, and receive tamper-proof certificates without revealing personal data.

2nd Place – VeriLoan

VeriLoan introduced trust-as-a-service for decentralized lending. The project combined Concordium’s identity layer with Envio’s HyperIndex reputation data to generate verified lending reports. Lenders can assess borrowers confidently without accessing secondary private information, improving both compliance and capital efficiency.

Bonus Prize – Blockbet

Blockbet tackled responsible gaming by embedding verified identity, smart contract automation, and behavioral analytics into a betting platform. It enables transparent, privacy-preserving oversight and ensures only verified users can participate while maintaining full auditability through PLT payments.

Key Takeaways

The Encode London 2025 Hackathon revealed growing enthusiasm for verifiable identity and PLT stablecoin integrations. Developers’ feedback will shape future updates to Concordium’s developer tooling and documentation.

The event proved on key insight: 

Privacy and compliance can thrive together without compromising usability.

The energy on the floor reaffirmed that this generation builders are ready to deliver trustworthy, transparent, and privacy-preserving Web3 applications powered by Concordium’s Smart Money infrastructure

BIG CONGRATS to the winners, and a warm thank-you to all participants, organisers, and partners for a weekend of creativity and collaboration. Concordium will continue supporting this community through future hackathons, developer programs, and open resources. This is just one out of many hackathons to come.

Keep building. Explore our Docs, GitHub, and Discord.

Join the Concordium Community, follow us on X.