Blockchain Engineering · 3 min read
BC · Blockchain & Web3
Blockchain engineered with the rigor of financial software.
We build smart contracts, tokenization platforms and on-chain/off-chain integrations for EVM networks. Immutable code demands the right architecture decisions before deployment, and that is where we focus the engineering.
Fig. 02 · Hash chain (real SHA-256, computed in your browser)
- Block #0LINKED
- previous hash
- …
- hash (SHA-256)
- computing…
- Block #1LINKED
- previous hash
- …
- hash (SHA-256)
- computing…
- Block #2LINKED
- previous hash
- …
- hash (SHA-256)
- computing…
- Block #3LINKED
- previous hash
- …
- hash (SHA-256)
- computing…
computing…
Simplified teaching model: real blocks also carry a Merkle root, timestamp, signatures and consensus data.
Problems we solve
In blockchain, the most expensive mistake is the one already deployed. We design to shrink the error surface before deployment.
ProblemApproach
The contract needs to evolve, but deployed code is immutable.
Explicit upgrade strategies with governance, timelocks and storage-migration tests, or deliberate immutability when that is the guarantee.
The backend treats on-chain events as final and breaks during reorganizations.
Indexing with confirmation depth, a block hash on every record and automatic rollback.
Wallet and signing logic is scattered and hard to audit.
An isolated signing layer, approval policies and an audit trail for every transaction sent.
Tokenization business rules are tangled with on-chain logic.
Only what must be on-chain goes on-chain, mutable rules stay off-chain, with a clear boundary between them.
What we build
Blockchain development services for businesses, from the contract to the integration with existing systems.
Smart contract development
Solidity contracts with unit, property and fuzz tests, and documented invariants.
EVM integrations
Enterprise systems connected to EVM-compatible networks, handling gas, nonces and RPC failures.
Tokenization platforms
Issuance, transfer controls and registries for tokenized assets, with compliance rules where applicable.
On-chain/off-chain integration
Reliable synchronization between on-chain state and databases, with idempotent events.
Wallet infrastructure
Custody, signing and approval policies for institutional operations.
Blockchain indexing
Reorg-safe event indexers with query APIs and webhooks.
DeFi infrastructure
Components such as oracles, liquidation mechanisms and integrations with existing protocols.
Web3 application architecture
End-to-end design of applications combining contracts, backend, indexing and interface.
Technical capabilities
What we apply to reduce risk, without promising what no vendor can guarantee.
Property tests and fuzzing
Contract invariants tested against thousands of generated call sequences.
Static analysis
Analysis tools in CI for known vulnerability patterns.
Established patterns
Widely reviewed libraries instead of re-implementing primitives.
Deliberate upgradeability
Proxies with storage-layout tests, or immutable contracts by decision.
Reorg handling
Explicit confirmation and rollback of off-chain state.
Key management
Isolated signing, HSMs or custody services, never keys in application environment variables.
Example applications
Typical scenarios. These are scope examples, not delivered projects.
- Capital markets
Receivables tokenization
Asset representation with transfer rules and an auditable registry.
- Fintech
Stablecoin settlement
On-chain payments integrated with existing reconciliation systems.
- Digital platforms
Indexing and analytics
Query APIs over contract events for products and reporting.
- Institutions
Wallet operations
Multi-signature approval flows with an audit trail.
Reference architecture
An EVM indexer that handles reorganizations and writes events idempotently.
Components
- RPC providers
- Three or more independent providers per network.
- Head quorum
- Advances only when a majority agrees on the latest block.
- Block fetcher
- Fetches blocks and logs in batches, with per-provider retries.
- Reorg detector
- Compares parentHash against the last N stored hashes.
- ABI decoder
- Turns raw logs into typed events per contract.
- PostgreSQL
- Upsert by (chain_id, tx_hash, log_index); rollback by block hash.
- Query API
- Queries return their confirmation level explicitly.
- Webhooks
- Notifications only after the configured confirmation depth.
Security, without impossible promises
No process removes all risk from a smart contract. What we do is shrink the attack surface and make risk visible.
- No absolute security claims
- We don't call a contract “secure”. We document the invariants tested and the known risks.
- Independent audit
- For contracts that hold value, we recommend an audit by a specialized, independent firm before launch, and we prepare the code and documentation for it.
- No financial promises
- We don't design or communicate token or protocol returns. Our scope is engineering.
- Regulation
- Tokenization may involve securities and anti-money-laundering rules. Legal analysis belongs to your team or specialized advisors; the architecture accommodates the requirements.
- Incident response
- Pause mechanisms, limits and on-chain monitoring defined before deployment, where the model allows.
How we implement
- 01
Threat modeling
Who can call what, how much value is at stake and what happens if an assumption fails.
- 02
Invariant specification
The properties that must never be violated, written before the code.
- 03
Development and testing
Contracts, property tests, fuzzing and static analysis in CI.
- 04
Testnet and integration
Full integration with backend and indexing on a test network.
- 05
Audit preparation and deployment
Documentation, code freeze, independent audit and monitored deployment.
Blockchain questions
Do you audit smart contracts?
We review and rigorously test the code we write, but we recommend that contracts holding value go through an independent audit firm. Whoever writes the code shouldn't be its only review.
Which networks do you work with?
We focus on EVM-compatible networks such as Ethereum and layer-2 networks. Network choice is part of the architecture phase and weighs cost, finality and ecosystem.
Do I need a blockchain for my project?
Maybe not. If there aren't multiple parties that need a shared record without trusting each other, a conventional database is usually better. We'll say so during assessment.
Do you build tokens for fundraising?
We engineer tokenization platforms. Offering structure, regulatory matters and investor communication belong with legal and financial specialists.
How do you handle private keys?
Keys never live in code or application environment variables. We use custody services, HSMs or isolated signing with approval policies.
Related insights
- Blockchain Engineering · 3 min read
Putting value on-chain?
Tell us what needs to be recorded or transferred and who takes part. We start with threat modeling.
Other expertise