Secure blockchain pilots, hardened for production.
7BlockLabs is a premier blockchain product studio dedicated to building production grade Web3 infrastructure for enterprises, brands, and protocols that cannot afford security failures or launch day chaos.
Unlike typical development shops that rely on freelancers, we operate as a dedicated, "audit ready" engineering pod, delivering battle tested smart contracts and scalable backend systems.
Our mission is to professionalize Web3 development by replacing the industry’s "hobbyist" standards with the rigor of safety critical software engineering.
We specialize in designing and shipping complex on chain architectures, including EVM and Solana smart contracts, cross chain bridges, and Zero Knowledge (ZK) proof systems.
Our technical pedigree is rooted in deep systems engineering; our team comprises senior engineers who have previously shipped large scale Rust infrastructure and critical systems at major firms like Arista Networks and Texas Instruments.
This expertise allows us to handle the "hard parts" of blockchain such as custody, oracle integrations, and threat modeling so your internal teams can focus purely on creative IP and business strategy.
Our engagement model is designed to eliminate vendor risk and ensure transparency. We work in fixed scope, 6–12 week pilots defined by clear requirements and measurable outcomes, not open ended consulting hours.
From day one, we build with the assumption that our code will be audited, providing comprehensive test suites, monitoring dashboards, and documentation that ensures a seamless handover.
We pride ourselves on building the "boring" infrastructure—such as reliable wallet lite onboarding and robust admin tools—that makes Web3 products actually function for mass market users.
By combining founder led delivery with milestone based billing and a post launch warranty, we offer a secure, predictable path from whitepaper to mainnet for organizations that demand integrity and uptime.
"7Block Labs deep technical expertise and connections within the Web3 blockchain ecosystem are impressive."
Jan 10, 2026
CTO, Engineering Company
Andrew Robbins
Other industries
London, England
1-10 Employees
Online Review
7Block Labs has developed and designed an app for an engineering company. The team has built the front- and backend using React, Next.js, Rust, and TypeScript, created a UX/UI, and written smart contracts.
7Block Labs has delivered the project without critical vulnerabilities, on time, and within budget. The team has also provided documentation, run books, and user screen recordings, and the app has 1,000+ active users and on-chain transactions. 7Block Labs is transparent and goes the extra mile.
BACKGROUND
Introduce your business and what you do there.
I’m the CTO of an engineering company. We focus on scaling zero knowledge proof applications on Solana and EVM chains.
OPPORTUNITY / CHALLENGE
What challenge were you trying to address with 7Block Labs?
We needed help with end-to-end development ownership, from architecting our entire app to writing legally compliant smart contracts.
SOLUTION
What was the scope of their involvement?
7Block Labs has been responsible for developing our app from scratch. The team has created legally compliant smart contracts and performed multiple rounds of audits, including third-party audits. 7Block Labs has also incorporated multiple versions of UI/UX design variations into the app's frontend development. Meanwhile, the backend development has gone ahead on its own path without any blockers. Finally, the team has integrated the frontend, backend, and smart contracts.
In terms of technologies, 7Block Labs has used Solana Anchor Rust smart contracts, backend systems in Rust and TypeScript, Next.js APIs, and React for the frontend. The team has also used GCP with KMS, cloud run instances, and multi-sig.
Moreover, 7Block Labs has linked the app on three different environments: a dev instance linked with DevNet, another one for testing, and the last one on MainNet. The team has also scoped the MainNet smart contract instructions to be gated to our company admins for two weeks to ensure a smooth launch before public access.
What is the team composition?
We’ve worked with 7Block Labs’ core team.
How did you come to work with 7Block Labs?
We found 7Block Labs through an online search, a referral, and Clutch. I had also worked with Jay in the past. We chose 7Block Labs over other options because they had high ratings, were close to my geographic location, and had pricing that fit our budget. Additionally, they had a great culture fit, good value for cost, and were referred to me. 7Block Labs’ company values aligned with ours, and they already had proven live MainNet projects.
How much have you invested with them?
We’ve spent a little over $100,000.
What is the status of this engagement?
We started working with 7Block Labs in January 2025, and our engagement is ongoing.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
7Block Labs has delivered 0 critical vulnerabilities, 100% production uptime without any dedicated maintenance time slots, 100% on-time delivery, and 100% within the budget. The team has also helped in locking 32K worth of assets safely on-chain. Moreover, we have 1,000+ on-chain transactions. 7Block Labs has handed over run books, documentation, and user screen recordings when a user uses the interface.
In the audit iterations, 7Block Labs has very keenly tracked the gas spent in Solidity contracts and compute units and priority fees in anchor contracts. The team has finally handed over the best versions of smart contracts without any security issues. 7Block Labs has also taken into account what pieces of code should live in Next.js TypeScript API routes and what should live in Rust backend servers to give the best performance.
How did 7Block Labs perform from a project management standpoint?
7Block Labs always delivers on time for the sprint goals. The team is very transparent about what’s not working and what the blockers are. 7Block Labs also tells us how much time it will take to resolve the blockers, which gives us a proper timeline of feature delivery and sprint goals. We communicate via virtual meetings, emails, and messaging apps.
What did you find most impressive about them?
7Block Labs’ deep technical expertise and connections within the Web3 blockchain ecosystem are impressive. When we have any blockers related to other technologies we’re using, the team not only tries to resolve the issue but also brings in people from outside within a day to get the issue resolved. To be honest, they did more than what I ask for.
Are there any areas they could improve?
After the project delivery, I asked 7Block Labs for fundraising requests. Their fundraising team was evolving at that time, so I had to wait for more than the expected time to get started with them.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Smart Contract Dev for Blockchain Infrastructure Dev
Blockchain
Confidential
Oct. - Dec. 2025
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"7Block Labs’ expertise in the field was impressive."
Jan 7, 2026
CTO, Engineering
Rohith R
Other industries
Paris, France
1-10 Employees
Online Review
7Block Labs developed zero-knowledge proof-based Solidity smart contracts for a blockchain infrastructure provider. The team created deployment scripts and a sample internal MVP DApp.
7Block Labs implemented all of the required functionality and ensured 100% test coverage, resulting in zero critical issues from security audits and internal MVP integration with smart contracts. The team leveraged their expertise in the field to deliver the project ahead of schedule.
BACKGROUND
Introduce your business and what you do there.
I’m the CTO of EVM L2s Faucet, a company that provides RPCs Infra and L2 test networks faucet.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire 7Block Labs to accomplish for EVM L2s Faucet?
We hired 7Block Labs for smart contract development.
SOLUTION
What was the scope of their involvement?
7Block Labs handled everything from the start, including gathering our requirements. The team delivered zero-knowledge proof-based Solidity smart contracts, tests, a sample internal MVP DApp, deployment scripts, and knowledge transfers to our internal team.
What is the team composition?
We worked with 7Block Labs’ project manager.
How did you come to work with 7Block Labs?
Someone referred 7Block Labs to me. We chose them because they were close to our geographic location, their pricing fit our budget, they were a great culture fit, and they offered good value for the cost.
What is the status of this engagement?
We worked together from October–December 2025.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
7Block Labs delivered before the expected deadline. We had zero critical issues, 100% test coverage, zero bugs from the security audit, zero issues from the internal MVP integration with smart contracts, and 100% functionality implementation as we discussed in the discovery call. We tracked these outcomes through team observations, feedback, and specific metrics from our security audit.
How did 7Block Labs perform from a project management standpoint?
7Block Labs delivered before time.
What did you find most impressive about them?
7Block Labs’ expertise in the field was impressive. They delivered the sprint goals completely every two weeks.
Are there any areas they could improve?
No, everything was good.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
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