Service / Web3
Launch a chain only if it earns its place.
Rollups and appchains on the OP Stack, Arbitrum Orbit, ZK stacks or Cosmos SDK, with sequencing, bridging, fees and decentralisation planned honestly.
[ 01 ]The short answer
What is Layer 2, Rollup and Appchain Development?
Rollup and appchain development is launching a dedicated blockchain for one application or ecosystem, usually as an Ethereum layer 2 built on a stack such as the OP Stack, Arbitrum Orbit or a ZK stack, or as a sovereign chain. A dedicated chain gives control over fees, throughput and sequencing revenue. It also adds bridges to secure, liquidity to attract and decentralisation milestones to meet. We start by testing whether an existing L2 would do, then build and operate the chain if not.
What you get
- Chain architecture decision record
- Deployed testnet and mainnet
- Bridge and explorer setup
- Node operations and monitoring
- Decentralisation milestones
[ 02 ]What we build
The pieces, built to last.
- 01
Chain launch
OP Stack, Arbitrum Orbit or ZK stack deployments, with Rollup-as-a-Service where it saves time.
- 02
Sequencing
Sequencer setup, fee policy, and a plan for shared or decentralised sequencing.
- 03
Bridges
Canonical bridges and fast withdrawals with multiple verifiers, never a single point of failure.
- 04
Custom gas and precompiles
Your own gas token or chain-level features your app needs.
- 05
Interop
Intent-based cross-chain flows so users do not have to think about which chain they are on.
- 06
Decentralisation roadmap
Fault or validity proofs and permissionless exits, staged and published.
[ 03 ]Where it pays off
Where it earns its keep.
- 01
High-throughput apps
Games, social and trading that would congest a shared chain.
- 02
Ecosystems
A home chain for a protocol family with shared liquidity.
- 03
Enterprises
Chains with permissioned participation and public settlement.
- 04
Fee and revenue control
Capture sequencing revenue and set fees for your users.
[ 04 ]How we deliver
Four steps, one team, start to finish.
The same people scope it, build it and stay after launch. Timings are typical for a first release; we agree yours after the deep dive.
- 01Week 1
Threat model and spec
Who can move money, under what conditions, and what happens when a key, an oracle or a bridge fails. Written down before code.
- 02Weeks 2 to 8
Build with invariants
Contracts or programs with unit, fuzz and invariant tests, least-privilege roles, timelocks and rate limits from the first commit.
- 03Weeks 6 to 10
Review and testnet
Internal review, an independent audit where value is at stake, and a public testnet with monitoring wired in.
- 04Ongoing
Mainnet and watch
A staged launch with caps, live alerting on admin actions and outflows, and a rehearsed incident plan.
[ 05 ]Stack
Tools we reach for.
Chosen per project, and we work in yours. Nothing here is a lock-in: you own the code and the accounts.
- OP Stack
- Arbitrum Orbit
- ZK Stack
- Polygon CDK
- Cosmos SDK
- Celestia
- EigenDA
- Conduit
- Caldera
- Blockscout
[ 06 ]Further reading
Problems we found, and how we would solve them.
- Interoperability3 min read
Fifty chains, one user: building across Ethereum's L2s
ProblemLiquidity and users are scattered across more than fifty L2s, each a silo with its own balances, bridges and trust assumptions, and few have reached full decentralisation.ProposalBuild chain-abstracted apps: smart accounts with unified balances, intent-based transfers filled by solvers (ERC-7683), canonical bridges only for large or slow moves, and every route capped by value at risk.Read the proposal - DeFi security3 min read
In 2026, DeFi lost more to keys than to code
ProblemMost stolen value now flows through compromised private keys, thin multisigs, single-verifier bridges and governance powers with no delay, which a code audit does not cover.ProposalAssume a key will be stolen: split and timelock admin powers, rate-limit outflows, delay collateral listings, require several independent verifiers, and wire monitoring that can pause before the treasury empties.Read the proposal
[ 07 ]FAQ
Questions buyers ask.
Usually not. Most applications are better served by deploying on an existing L2. A dedicated chain makes sense at sustained high volume, for custom fees or features, or for an ecosystem. We will tell you which applies.
It describes who can stop withdrawals or change the rules. Very few L2s have reached the highest stage. We publish a plan and keep to it.
Through canonical bridges for security and intent-based routes for speed. Our article on L2 fragmentation covers the design.
[ 08 ]More Web3 services
- Smart Contract DevelopmentContracts that do exactly what they promise.
- Solana Program DevelopmentSub-second apps on the fastest major chain.
- dApp DevelopmentOnchain apps people actually enjoy using.
- DeFi Protocol DevelopmentFinancial protocols that survive real markets.
- Smart Contract Security AuditFind the flaw before an attacker does.
- Real-World Asset TokenizationAssets that settle in minutes, not days.
- Stablecoin and Crypto PaymentsGlobal payments that settle in seconds.
- Wallets and Account AbstractionSelf-custody without the seed-phrase pain.
- Cross-Chain and InteroperabilityOne product across every chain your users use.
- Zero-Knowledge Proof DevelopmentProve it without revealing it.
- Onchain AI Agents and Agent PaymentsAgents that can earn, pay and be trusted.
One company at a time