Decentralized finance (DeFi) replaces parts of the financial system with smart contracts: lending without a bank, trading without a broker, yield without a fund manager. It also means that the contract is the institution. If the logic is wrong, or an attacker can manipulate a price, funds can be lost in a single transaction.
SemBricks develops DeFi in two layers. We build the protocol contracts themselves, and we build the off-chain tools that users, treasuries and trading teams need to work with DeFi safely: dashboards, monitoring and position management.
DeFi Protocol Development
- Vaults and yield strategies: contracts that pool deposits and put them to work, with clear share accounting and withdrawal rules.
- Staking and reward distribution: lock-ups, reward rates and fair distribution, including vesting for team and investor tokens.
- Lending and collateral logic: collateral ratios, interest models and liquidations that hold up when markets move fast.
- Fee and treasury mechanisms: protocol fees, buybacks and treasury management under multisig control.
- Integrations with existing protocols: building on top of established DEXs and lending markets instead of reinventing them.
DeFi Tools and Dashboards
- Yield dashboards: one view of positions, APY and rewards across protocols and chains.
- Liquidity monitoring: tracking TVL, pool depth and price impact, with alerts when conditions change.
- Position management: monitoring and adjusting lending, farming and LP positions, including health factors and liquidation risk.
- Automation: rebalancing, compounding and protective actions through on-chain automation and trading tools.
Where DeFi Goes Wrong
Most DeFi losses are not exotic. They come from a short list of patterns that we design against from the start:
- Price manipulation: a protocol that reads a spot price from a single pool can be tricked with a flash loan. Robust oracles, time-weighted prices and sanity checks prevent this.
- Accounting errors: rounding in share calculations, first-depositor attacks on vaults and reward calculations that drift over time.
- Liquidation failures: liquidations that become unprofitable or impossible in a crash, leaving the protocol with bad debt.
- Admin and upgrade risk: keys that can drain or change the protocol, held by one person. We put them in a multisig behind a timelock.
- Composability surprises: unexpected behaviour of the tokens and protocols you integrate with, such as fee-on-transfer or rebasing tokens.
Every DeFi contract we write gets thorough tests, including fuzz and invariant tests on the accounting, and is prepared for an independent audit. See smart contract audit support.
Frequently Asked Questions about DeFi Development
Do we need our own protocol, or can we build on existing ones?
Often you can build on existing protocols, which is faster and safer: their contracts have been audited and battle-tested. A new protocol makes sense when your product needs logic that does not exist yet. We will help you decide.
Which chains do you build DeFi on?
Mainly Ethereum and EVM chains such as Base, Arbitrum and Polygon, where most DeFi liquidity lives, and Solana for high-volume use cases.
Can you build dashboards for protocols we did not build?
Yes. Yield dashboards, liquidity monitoring and position management work on top of any protocol with public contracts. We read the on-chain data directly or through indexers.
How do you test DeFi contracts?
With unit tests, fuzz and invariant tests on the accounting, and tests on a fork of mainnet so integrations with real protocols and real prices are covered before deployment.
Who owns the code?
Ownership of the source code is set out in the contract, and the code can be fully yours, including documentation and tests.
Can you sign an NDA?
Yes, we sign an NDA on request before discussing details.
See also our overview of blockchain and web3 development.
Discuss Your DeFi Project
Building a protocol, or need better tools to manage DeFi positions? Tell us what you have in mind and we will help you shape it safely.
Book a free call about your DeFi project
DeFi Liquidity Monitoring: Pools, Depth and Early Warnings
DeFi liquidity monitoring: pool depth, price impact, liquidity removals, stablecoin pool imbalance and lending utilisation, with alerts.
DeFi Position Management: Monitoring and Automation
Custom DeFi position management: monitor health factors and liquidity ranges, get alerts, and automate rebalancing and deleveraging with safe permissions.
DeFi Yield Dashboard Development
Custom DeFi yield dashboards: positions across protocols and chains, real yield versus incentives, net returns after costs, risk signals and alerts.