New: Smart Contract Security Checklist (pre-launch) is live. Grab the PDF
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Blockchain native product team

Your Web3 product, shipped. No bullshit.

& Stop negotiating with audit firms.
We are your e2e blockchain dev team, delivering battle-tested code so you can focus on your business, not your tech stack.

Solutions

We take care of blockchain development from concept to scale

Our squads ship production-grade protocol components, integrations and experiences. Choose the track you need or let us design the bespoke mix that accelerates your roadmap.

Enterprise

Enterprise Solutions

Bring your company to the next level with innovative blockchain infrastructure, custom governance and verifiable data trails.

  • DAO & governance platforms
  • Blockchain micropayments
  • Supply chain & traceability
Integration

Blockchain Integration

Expand the possibilities of your business by connecting wallets, bridges and on-chain data to your existing products.

  • Centralized & hybrid exchanges
  • Decentralized marketplaces
  • CRM / ERP blockchain integrations
Ecosystems

Blockchain Ecosystems

Launch new protocols or extend existing networks with validators, on/off ramps and aligned token economics.

  • Token launches & vesting
  • Custom L1 / L2 deployments
  • Cross-chain bridges & messaging
Dev Tools

Developer Tooling

Attract external builders with SDKs, documentation and testing sandboxes that make shipping on your chain effortless.

  • SDKs & API gateways
  • CLI / IDE extensions
  • Analytics dashboards & explorers
Proof

Recent Web3 security-first builds on testnet

Audited protocols trust us to ship secure smart-contract systems before production.

Social proof · Results

Hover to animate · Click for modal
Solana zk bridge demo validating replay-safe proofs in the testnet explorer

Replay attacks + cross-chain state integrity

Solana zk bridge replay hardening

Live zk proof attestation run showing how we gate relayers, enforce guardian quorums and block replay windows before mainnet.

Solana testnet
zk bridge
Guardian quorum
45s proof window
Dual attestor quorum live
View Solana testnet
EVM Sepolia security demo catching oracle manipulation on-chain

Oracle manipulation + double withdrawals

EVM Sepolia oracle failover drill

Collateralized debt position replay with forced oracle deviation to prove double-withdrawal and oracle manipulation defenses hold.

Sepolia
CDP monitoring
Circuit breakers
3 feeds cross-checked
Auto pause < 400ms
View EVM Sepolia
IPFS tree traversal demo validating DAO vote integrity

Anonymous vote fraud + oracle proofs

IPFS vote ledger integrity sweep

Anonymous vote audit trail pushed through IPFS Merkle proofs to surface tampering, replay signatures and fraud attempts.

IPFS
Merkle proofs
DAO governance
Tree depth: 42
0 mismatched hashes
View IPFS tree

How we work · Security process

Phase 1

Threat-model capture

Shadow-fork runs that push oracle drift, zk proof expiry and cross-chain relayer swaps before auditors see the code.

  • • Oracle chaos triggers every 15 minutes
  • • Replay signatures recorded + diffed
  • • Guardian + sequencer quorum monitored

Phase 3

Ship room instrumentation

We wire Grafana, Prometheus and custom dune boards so these same checks stay live after go-live.

  • • Endpoint SLOs + alert routing rehearsed
  • • Contracts + off-chain agents traced

Phase 2

Security process clips

Stacked GIF thumbnails captured from the same testnet runs your launch plan relies on.

Arbitrum sequencer monitoring dashboard with failover alerts

Sequencer uptime + force inclusion paths

Arbitrum sequencer failover test

Sequencer liveness probe simulating downtime scenarios to validate L2-to-L1 force-inclusion paths and delayed inbox processing.

StarkNet fuzzing results showing edge case coverage

Cairo edge cases + arithmetic safety

StarkNet Cairo contract fuzzing

Automated fuzzing campaign targeting Cairo smart contracts for arithmetic overflows, reentrancy patterns and felt252 edge cases.

Optimism bridge invariant monitoring with proof validation

Bridge invariants + withdrawal proofs

Optimism bridge invariant checks

Cross-domain messenger validation ensuring L1-L2 message integrity, withdrawal proof verification and challenge period enforcement.

Captions feed straight into the launch readiness doc so phase reviewers see evidence, not promises.

Live demos · Interactive carousel

See our security work in action

Each demo shows real testnet transactions. Hover to preview or click to explore the full implementation.

Schedule security review
Solana zk bridge demo validating replay-safe proofs in the testnet explorer

Replay attacks + cross-chain state integrity

Solana zk bridge replay hardening

Live zk proof attestation run showing how we gate relayers, enforce guardian quorums and block replay windows before mainnet.

Solana testnet
zk bridge
Guardian quorum
45s proof window
Dual attestor quorum live
View Solana testnet
EVM Sepolia security demo catching oracle manipulation on-chain

Oracle manipulation + double withdrawals

EVM Sepolia oracle failover drill

Collateralized debt position replay with forced oracle deviation to prove double-withdrawal and oracle manipulation defenses hold.

Sepolia
CDP monitoring
Circuit breakers
3 feeds cross-checked
Auto pause < 400ms
View EVM Sepolia
IPFS tree traversal demo validating DAO vote integrity

Anonymous vote fraud + oracle proofs

IPFS vote ledger integrity sweep

Anonymous vote audit trail pushed through IPFS Merkle proofs to surface tampering, replay signatures and fraud attempts.

IPFS
Merkle proofs
DAO governance
Tree depth: 42
0 mismatched hashes
View IPFS tree
Arbitrum sequencer monitoring dashboard with failover alerts

Sequencer uptime + force inclusion paths

Arbitrum sequencer failover test

Sequencer liveness probe simulating downtime scenarios to validate L2-to-L1 force-inclusion paths and delayed inbox processing.

Arbitrum
Sequencer
L2 rollup
Failover < 12s
Force-include tested
View Arbitrum Sepolia
StarkNet fuzzing results showing edge case coverage

Cairo edge cases + arithmetic safety

StarkNet Cairo contract fuzzing

Automated fuzzing campaign targeting Cairo smart contracts for arithmetic overflows, reentrancy patterns and felt252 edge cases.

StarkNet
Cairo
Fuzzing
12k iterations
3 edge cases caught
View StarkNet Sepolia
Optimism bridge invariant monitoring with proof validation

Bridge invariants + withdrawal proofs

Optimism bridge invariant checks

Cross-domain messenger validation ensuring L1-L2 message integrity, withdrawal proof verification and challenge period enforcement.

Optimism
Bridge security
Invariants
7-day challenge
100% proof coverage
View OP Sepolia
Polygon checkpoint validation with signature verification

Checkpoint finality + validator consensus

Polygon PoS checkpoint validation

Heimdall checkpoint submission monitoring with validator signature aggregation and Bor block finality verification.

Polygon
PoS
Checkpoints
256 block epochs
2/3+ signatures
View Polygon Amoy
Avalanche subnet security dashboard with warp message traces

Subnet isolation + warp messages

Avalanche subnet security audit

Custom subnet validator set rotation testing with warp message verification and cross-subnet communication security.

Avalanche
Subnets
Warp
4 validators rotated
0 invalid warps
View Fuji testnet

Hire 7BlockLabs

Build, audit and launch with a partner that shares your conviction

We plug in as your blockchain product squad—whether you need a sprint to MVP, hands-on support post raise or an extended core team.

Expertise

Technical breadth that lets you move fast without compromise

Our engineers bring experience across chains, languages and tooling stacks so we can launch and iterate with the best fit technology—not force-fit a favourite.

Ethereum
BNB Chain
Polygon
NEAR
Solana
Avalanche
Arbitrum
Optimism
Aurora
Aptos
Sui
TON
Polkadot
Cosmos
Secret Network
StarkNet
Process

A cooperation model built for clarity and momentum

Structure and communication that keep every engagement transparent. We keep you close to critical decisions without adding overhead.

  1. Our product leads and blockchain architects refine requirements with you, highlighting technical risks, opportunities and measurable outcomes.

  2. We shape a delivery roadmap, resource plan and target architecture so every stakeholder understands the path to mainnet.

Collaboration

Engagement models built around your roadmap

Whether you need a sprint team for a critical launch or an embedded unit to scale long-term, we tailor engagement to your operating rhythm.

Project-Based

Best for: Clear requirements, strict deadline

Fixed scope and timeline to deliver a well-defined MVP or feature set.

  • Fixed deliverables
  • Predictable budget
  • Weekly demos
  • QA & release support
Typical start: 1-2 weeks
Talk to us

Dedicated Team

Best for: Growing products & ongoing delivery

Cross-functional squad that scales with your roadmap and velocity goals.

  • Engineers + PM/Designer
  • Capacity on demand
  • Sprint rituals
  • Velocity metrics
Typical start: 1-2 weeks
Talk to us

Retainer / Support

Best for: Post-launch iterations & upkeep

Flexible monthly bucket for improvements, audits, maintenance and on-call support.

  • Monthly hours
  • Priority support
  • Bug SLA
  • Ad-hoc features
Typical start: 1-2 weeks
Talk to us

Unsure what works best?

Book a 15-min scoping call
Team

The leadership guiding protocol, product and growth

Our leads pair venture-backed experience with deep protocol engineering roots. Every engagement taps into founders who have shipped and scaled web3 products.

Jay K

Jay K

Founder & CEO

Insights

From audits to growth loops — learnings from the 7BlockLabs crew

We document the frameworks, checklists and hard-earned lessons that shape how we build blockchain products with our partners.

Blockchain DevelopmentNov 30, 202512 min read

Onchain Billing for Staking APIs: Lessons from 2025’s Developer Platforms

Short summary: In 2025, staking APIs finally moved billing onchain. This post distills what actually shipped (and worked) across Coinbase, Figment, Kiln and the EigenLayer ecosystem—plus concrete integration patterns, code-level examples, a

Read article
Blockchain TechnologyNov 30, 202513 min read

verifiable data solutions for RWAs: From Source Documents to Onchain Proofs

A practical, end-to-end playbook for taking real‑world documents and data (identity, ownership, cash flows, NAV, trade docs) and turning them into verifiable, machine‑checkable proofs on public chains—using modern attestations, privacy-pres

Blockchain StrategyNov 30, 202511 min read

enterprise blockchain consulting: Building a Two-Year Roadmap with KPIs and Guardrails

Decision-makers’ guide to standing up an enterprise-grade blockchain program in 24 months—complete with outcome-driven KPIs, regulatory guardrails, and technical milestones that reflect 2024–2025 realities.

BlockchainNov 30, 202510 min read

How Can Token Design Consultants Help with Tokenomics?

> Summary: Token design consultants bridge economics, regulation, and market mechanics to turn a token from an idea into a sustainable, compliant, and liquid asset. In 2025, that means modeling incentives, de‑risking launches, aligning with

Blockchain DevelopmentNov 30, 202510 min read

DEX Development Services, Polygon CDK, and Func TON Development: Choosing a Tech Stack

A concise guide for founders and product leaders deciding between launching a DeFi appchain with Polygon CDK or building natively on TON with FunC—complete with 2025-era capabilities, concrete design patterns, and implementation playbooks.

Blockchain TechnologyNov 30, 20259 min read

Web3 API Essentials: How Dapps Talk to Chains in 2025

In 2025, production-grade dapps rely on a richer, faster, and more standardized Web3 API stack than even a year ago. This guide distills what actually changed (and why it matters), and shows concrete patterns you can ship today across reads

Blockchain TechnologyNov 29, 202514 min read

verifiable data vendor: How to Run a Proof-of-Concept Without Biased Metrics

> Summary: Most blockchain proof-of-concepts for “verifiable data vendors” quietly fail because they benchmark the wrong things and let vendors optimize to vanity metrics. This playbook shows decision‑makers how to run a 30‑day, bias‑resist

Decentralized FinanceNov 29, 202512 min read

Intavallous Token Utility: Designing Tokens for Long-Term DAO Value

A practical, interval-based framework for turning a token into durable DAO value. We combine current best practices from leading protocols (Curve, Optimism, Arbitrum, Uniswap, Lido, Aave, EigenLayer, Gitcoin) with implementation-ready param

Blockchain TechnologyNov 29, 202512 min read

Putting It Together: A 2025 Reference Stack (EIP-7702 + Intents + x402 + Private Proving)

Short summary: A concrete, production‑ready stack for 2025 that pairs EIP‑7702 smart EOAs, ERC‑7683 intents/OIF, HTTP‑402 payments (x402), and private proving—complete with architectures, code patterns, and rollout playbooks for startups an

Ethereum DevelopmentNov 29, 202511 min read

EIP-7691 Cost Curves: Modeling Blob Fee Volatility for App Teams

> Summary: EIP-7691 doubled Ethereum’s target blob capacity and retuned the fee update curve, changing how blob base fees rise and fall block-to-block. This guide shows decision‑makers how to model the new cost dynamics, quantify volatility

FAQ

Answers to common questions about partnering with 7BlockLabs

Can’t find what you’re looking for? Reach out and we’ll share more context on how we work and what we can ship together.

FAQ

Your blockchain questions, answered

Quick, straightforward answers about our blockchain development services, tech stack, locations, and post‑launch support.

Contact

Tell us about the product you want to ship

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7BlockLabs

Full-stack blockchain product studio: DeFi, dApps, audits, integrations.

7Block Labs is a trading name of JAYANTH TECHNOLOGIES LIMITED.

Registered in England and Wales (Company No. 16589283).

Registered Office address: Office 13536, 182-184 High Street North, East Ham, London, E6 2JA.

© 2025 7BlockLabs. All rights reserved.