Smart contract engineering
Solidity and EVM contracts for tokens, escrow, access control, and settlement, with unit tests, fuzzing, and explicit upgrade or immutability decisions.
Blockchain
Ship on-chain products that survive contact with production.
We build the contracts, the wallets, and the operational layer around them, so token flows, permissions, and audits are designed before mainnet, not after the first incident.
L0Edge / CDN
L1API gateway
L2Tenant runtime
L3Data plane
L4Observability
01The work
On-chain systems with the same operational discipline as the rest of your stack.
Blockchain work fails when teams treat a contract as a demo and leave custody, indexing, keys, and upgrades as afterthoughts. Codeaxes starts with the business transaction: who can mint, transfer, pause, or settle, and what happens when a transaction reverts. We implement Solidity or permissioned-chain contracts with automated tests, then wrap them in APIs, indexers, and operator consoles so finance, support, and compliance can see state without reading a block explorer. Gas, finality, and key management are part of the architecture, not launch-week surprises.
02Problems
What this service is for.
01
A token or NFT pilot exists, but nobody owns keys, upgrades, or incident response.
02
Smart contracts were written without tests, and a mainnet change would be irreversible.
03
Users cannot complete a flow because wallets, gas, and KYC sit outside the product.
04
On-chain events never reach CRM, billing, or internal ledgers, so finance reconciles by hand.
05
Permissioned consortium members cannot agree on identity, settlement, or data visibility.
06
Security review stalls because threat models, admin roles, and pause switches are undocumented.
03Capabilities
What we actually deliver.
Wallets and account flows
Custodial, non-custodial, or embedded wallet UX with recovery, spending limits, and clear signing prompts that operators can support.
Token and NFT product surfaces
Mint, transfer, royalty, and allowlist flows wired to your product, not a disconnected mint page that never talks to the rest of the business.
Indexing and off-chain systems
Event indexers, APIs, and databases that keep CRM, dashboards, and support tools in sync with chain state.
Permissioned and consortium chains
Hyperledger or private EVM networks when public settlement is the wrong fit, with identity, channels, and operational runbooks for member orgs.
Security and launch operations
Threat models, admin role design, pause switches, monitoring, and coordinated testnet-to-mainnet checklists with third-party review when the risk warrants it.
- ▹ Contract architecture with roles, upgrade policy, and failure modes documented
- ▹ Tested smart contracts plus deployment scripts for testnet and mainnet
- ▹ Wallet and product UI for the flows users actually complete
- ▹ Indexer and API layer that exposes chain events to internal systems
- ▹ Key management and admin runbooks, including incident and pause procedures
- ▹ Launch checklist covering gas, monitoring, and post-deploy verification
04Workflow
How this engagement runs.
01
Transaction design
We map the business event to on-chain state, who signs, who can reverse, and which data must stay off-chain for privacy or performance.
02
Contract and threat model
Roles, invariants, and upgrade strategy are written before implementation, then encoded as tests that fail if those invariants break.
03
Build and integrate
Contracts, indexers, and product surfaces ship together so a successful transaction is visible in the app, not only on a block explorer.
04
Testnet rehearsal
Load, failure, and admin drills run on testnet, including key rotation and pause, before any mainnet value is at risk.
05
Mainnet and operate
Staged deploy, monitoring, and a named owner for incidents, with a path to iterate without surprising token holders or partners.
05Fit
Industries and stack.
Industries
7 sectors
- Fintech
- SaaS
- Media
- Logistics
- Healthcare
- Ecommerce
- Manufacturing
Typical stack
Tools we actually operate
06Use cases
Where this shows up in production.
Programmable settlement between partners
Escrow and release rules live in contracts, while invoices and exceptions still appear in the operator console finance already uses.
Membership or access tokens
On-chain entitlements gate product features, with off-chain identity so support can restore access without exposing private keys.
Supply-chain attestation
Shipment or batch events are hashed on-chain, with rich documents stored off-chain and linked for auditors who need both.
Internal treasury dashboard
Multi-sig policy, spend limits, and labeled transfers so finance sees chain activity in the same language as the rest of cash operations.
- Contracts with tests and an explicit upgrade or freeze policy
- Product UX that does not assume every user is a crypto-native
- Off-chain systems that keep operations, support, and finance in the loop
- Launch rehearsal on testnet before real value moves
- A threat model you can show a security reviewer without improvising
07Work
Related case studies.
Fintech and Financial Services
LedgerKit
LedgerKit required onboarding that felt fast to applicants while giving risk and ops teams defensible case files, not screenshots scattered across email.
- TypeScript
- Node.js
- PostgreSQL
Applicant clarityStatus page aligned to actual pipeline stage
Open study
Ecommerce and Retail
Harbor Commerce
Harbor Commerce needed a headless storefront and inventory layer that kept web, mobile, and marketplace channels aligned through peak promotional periods.
- TypeScript
- Next.js
- Shopify Hydrogen
Catalog consistencySingle source across web, app, and marketplace feeds
Open study
SaaS and Technology
Northline Analytics
Northline needed one analytics workspace model for self-serve teams and enterprise accounts without maintaining parallel codebases or fragile permission hacks.
- TypeScript
- Node.js
- PostgreSQL
Provisioning timeHours → minutes for standard enterprise workspaces
Open study
Logistics and Mobility
RouteWise Mobility
RouteWise built a dispatch platform that prioritizes exceptions, supports dispatcher overrides, and keeps drivers productive when connectivity is unreliable.
- TypeScript
- Go
- PostgreSQL
Dispatcher focusExceptions surfaced before routine stop noise
Open study
08FAQ
Questions about Blockchain.
Do you only work on public Ethereum?
No. We choose public EVM chains, L2s, or permissioned networks based on settlement needs, privacy, and who must operate the infrastructure. The product and the chain are decided together.
Can you audit our existing contracts?
We review architecture, tests, and admin roles, and we harden what we find. For high-value mainnet code we coordinate an independent specialist audit rather than treating an internal review as a substitute.
How do you handle keys and custody?
We design for the custody model you need: user-held wallets, embedded wallets, or institutional custody. Secrets never live in the repo, and admin keys have documented rotation and dual-control where the risk requires it.
What if we already have a token and need a real product around it?
That is a common engagement. We inventory the live contracts, then build indexing, wallets, and operator tools so the token is usable inside a product, not only tradable.
Do you build production blockchain products or only prototypes?
We ship contracts, wallets, and the off-chain systems around them, with tests and an upgrade or freeze policy. A demo contract without keys, indexing, or incident runbooks is not a complete engagement.