Web3 · Engineering
DeFi Protocol Development
Most DeFi protocols fail at the mechanism, not the code: an interest-rate curve that runs insolvent, an AMM that bleeds liquidity to arbitrage, a liquidation path that never fires. DeFi protocol development services turn that mechanism design into a live, audited product. We engineer the lending markets, AMM pools, perpetual exchanges, and yield vaults that hold real money, plus the keepers and oracles that keep them solvent.
- 1 monthYield + banking moduleOrbitXpay
- 4Hacken audit roundsNeemo Finance
- EVM · Solana · CosmosChains we ship on
In short
What is DeFi Protocol Development?
DeFi protocol development services are an on-chain financial engineering practice for protocol founders that ships audited lending, AMM, perpetual, and yield-vault mechanisms with the keepers and oracles that keep them solvent. Our Neemo Finance lending and AMM contracts cleared four separate Hacken audit rounds on Astar. For OrbitXpay we delivered yield protocols and a banking module in one month.
What we deliver
Concrete artefacts, not capabilities
- 01
Core mechanism contracts: lending, AMM, perp, or vault logic.
- 02
Oracle integration with fallback feeds and circuit-breaker thresholds.
- 03
Keeper infrastructure for liquidations, settlements, and rebalancing.
- 04
Subgraph or indexer powering health metrics and frontend data.
- 05
Mainnet deployment scripts, multisig handover, and a parameter runbook.
Key concepts
Key terms, defined
- Constant-product market maker
- A constant-product market maker is an automated market maker that prices a swap so the product of its two pool reserves stays constant: x times y equals k. Each trade moves reserves along the curve, and the price is the ratio of reserves. Larger trades against a thin pool incur more slippage, which is the basis of AMM price discovery.
- Health factor
- A health factor is the ratio of a borrower’s collateral value, weighted by its liquidation threshold, to the value they have borrowed. A health factor above one means the position is solvent; at or below one the position becomes liquidatable. Lending protocols read this value continuously to decide when keepers may seize and repay collateral.
- Liquidation
- Liquidation is the process by which a lending or perpetual protocol closes an undercollateralised position to protect solvency. A keeper or liquidator repays part of the debt and seizes collateral plus a bonus. Reliable liquidation depends on a fresh oracle price and a keeper that fires before the position goes underwater.
- Yield vault
- A yield vault is a smart contract that pools deposits and routes them into a strategy that earns return, then distributes that return to depositors as share appreciation. Vaults abstract gas and rebalancing away from the user. The core risks are strategy failure, oracle manipulation on the share price, and the keeper that triggers compounding.
How we work
Engagement phases
Mechanism spec
We translate the economic intent into a written specification: interest-rate curves, collateral factors, the constant-product or stableswap invariant, funding-rate logic, liquidation incentives, and fee splits. Each parameter carries a stated range, a rationale, and a failure mode. The spec becomes the engineering brief and the first document the external auditor reads.
Contracts & off-chain
We build the mechanism contracts against the spec while the keepers, indexer, and oracle layer go in parallel. Property-based tests assert the invariants that matter: solvency, accounting conservation, and role isolation. Fork tests replay the protocol against historical mainnet state, so liquidation and settlement paths are exercised before mainnet, not after.
Audit & hardening
The contract suite goes to a firm chosen with you. We respond to findings within 48 hours and ship fixes against a second-round review. Our Neemo Finance lending and AMM contracts cleared four separate Hacken audit rounds on Astar. Oracle assumptions, keeper failure modes, and admin-role boundaries are documented for the auditor before review opens.
Launch & operate
Mainnet deployment runs from a reviewed script. We verify sources on the explorer, transfer admin to your multisig, and start keeper and indexer services under monitoring. After launch we run incident response on a defined SLA, ship parameter changes through governance, and hand over runbooks. For OrbitXpay we delivered yield protocols and a banking module inside one month.
Tech stack
What we build on
- SolidityLanguage
- VyperLanguage
- FoundryTesting
- ChainlinkOracles
- PythOracles
- The GraphIndexing
- GelatoKeepers
- TenderlyMonitoring
- SlitherStatic Analysis
- SolidityLanguage
- VyperLanguage
- FoundryTesting
- ChainlinkOracles
- PythOracles
- The GraphIndexing
- GelatoKeepers
- TenderlyMonitoring
- SlitherStatic Analysis
Scope
When this fits and when it doesn't
| This fits when | This doesn't fit when |
|---|---|
| You have a lending, AMM, perp, or vault mechanism and need the contracts, keepers, and oracles built together. | You want to fork an existing AMM or lending market and rebrand it without economic review. |
| External audit is part of the launch budget, and solvency under stress is a hard requirement. | The token needs a launchpad or sale mechanic, not an operating financial protocol. |
| The protocol has a definable oracle source, liquidation model, and admin-role boundary. | Off-chain keeper and indexer work is expected to be handled by a separate vendor. |
Related work
Shipped engagements
- Live project
OrbitXpay: on-chain yield and banking module
Yield protocols and an integrated banking module delivered in one month, pairing DeFi mechanism contracts with a user-facing balance and payments layer.
View live project - Live project
Neemo Finance: Astar lending and AMM protocol
Lending and AMM contract suite for a DeFi protocol on Astar that cleared four separate Hacken audit rounds before mainnet.
View live project
Related services
Adjacent engagements
- Web3
Smart Contract Development
Solidity, Vyper, and Move contracts engineered for third-party audit, with tests and monitoring.
- Web3
Liquid Staking & Restaking Vaults
LST and LRT vault systems with restaking, validator routing, and risk controls.
- Web3
Tokenomics Design
Token supply, distribution, emissions, and governance modelling stress-tested against on-chain behaviour.
Frequently asked questions
DeFi protocol development services build the on-chain financial mechanism a protocol runs on: lending markets, AMM pools, perpetual exchanges, or yield vaults. The work covers the mechanism specification, the contracts that enforce it, the oracles that price collateral, and the keepers that handle liquidations and settlements. We engineer for third-party audit from the first commit rather than retrofitting it later.
Most protocols ship to mainnet 12 to 20 weeks from a written spec. The mechanism spec and threat model take 2 to 3 weeks. Contracts and off-chain infrastructure run 6 to 10 weeks in parallel. External audit and hardening add 4 to 6 weeks depending on findings. For OrbitXpay we delivered yield protocols and a banking module inside one month against a tightly scoped mechanism.
We ship across EVM chains, Solana, and Cosmos. Chain choice follows the protocol: liquidity depth, oracle availability, transaction cost, and the wallet ecosystem your users already hold. We do not push founders toward a chain we prefer. For protocols that must live on more than one chain, we engineer for it from the spec rather than retrofitting a bridge later.
Solvency is engineered into the mechanism, not bolted on. We model interest-rate and funding curves so the protocol stays collateralised under stress, integrate oracles with fallback feeds and circuit breakers, and run keepers that liquidate before a position goes underwater. Property-based tests assert solvency as an invariant, and fork tests replay the liquidation path against real historical market moves.
You do, with our recommendation. We have worked with Hacken across four audit rounds on the Neemo Finance lending and AMM contracts and can introduce firms whose specialism matches your mechanism, whether that is lending, AMMs, or perpetuals. We do not bundle audit cost into our fee or take a referral cut. The audit is a separate line item paid directly to the firm.
Last reviewed · Reviewed by Metaborong engineering team
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