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Protofire

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Blockchain development for Web3, DeFi & RWA

Protofire is one of the earliest blockchain engineering firms, building and operating production Web3 systems since 2016. We maintain Solhint, an open-source Solidity linter and security tool used by over a million developers, and we build within the Chainlink, Safe, The Graph, and Blockscout ecosystems.

We are a full-stack blockchain engineering partner. Our teams design, ship, and operate:

  • Min project size
    $1,000+
  • Hourly rate
    $25 - $49 / hr
  • Employees
    50 - 249
  • Locations
    Sunnyvale, CA
  • Year founded
    Founded 2016
  • Languages

8 Languages that we service

  • English
  • Spanish
  • Portuguese
  • Russian
  • Polish
  • French
  • Italian
  • Ukrainian

1 Locations

  • Sunnyvale , CA

Service Lines
Blockchain
90%
Custom Software Development
10%
Select Focus Area
Blockchain Focus
Smart Contract Development
30%
Decentralized Finance
20%
Ethereum Development
20%
Smart Contract Auditing
15%
Tokenization
15%
Industries
Financial services
55%
Information technology
35%
Business services
10%
Clients
Midmarket ($10M - $1B)
45%
Small Business (<$10M)
30%
Enterprise (>$1B)
25%

Pricing Snapshot

Min. project size $1,000+
Avg. hourly rate $25 - $49 /hr
Rating for cost 4.8 /5

Most Common Project Size

$10,000 - $49,999 based on 1 review
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000
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Overall Review Rating

4.8

  • Quality

    5.0 /5

  • Schedule

    4.8 /5

  • Cost

    4.8 /5

  • Willing to Refer

    5.0 /5
See all 2 Reviews

Protofire Reviews

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Custom Software Development for IT Company

Featured Review
  • Blockchain Custom Software Development DevOps Managed Services
  • Smart Contract Development Web3
  • $10,000 to $49,999
  • Oct. 2025 - Feb. 2026
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"We were impressed with Protofire's communication."

Jul 27, 2026
Chief Marketing Officer, Pharos Network
Michelle Kang
  • Information technology
  • Hong Kong
  • 51-200 Employees
  • Online Review

Protofire handled smart contract engineering and web3 infrastructure support for an information technology company. They deployed Safe multisig infrastructure on the client's testnet and provided documentation.

API Integration Services for AI Verification Company

  • Blockchain Blockchain Marketing Custom Software Development
  • Confidential
  • July 2026 - Ongoing
4.5
Quality
5.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"Their project management has been very professional."

Aug 4, 2026
CEO & Co-Founder, Dowsers
Patrick Azzopardi
Verified
  • Financial services
  • Paris, France
  • 11-50 Employees
  • Online Review
  • Verified

Protofire has integrated a static analyzer API into Solhint for an AI verification company. This task has enabled developers to automatically verify the security of their smart contracts.

Showing 1-2 of 2 Reviews

Our Story

We started Protofire in 2016 because serious blockchain teams needed engineers who would build real systems and stay to run them. We have kept that up through every market cycle since. We maintain Solhint, the open-source Solidity linter used by over a million developers, and we build and operate infrastructure across the Chainlink, Safe, and The Graph ecosystems. When chains, protocols, and finance teams need on-chain products that last, they come to us

What Sets Us Apart

Safe Guardians

Protofire has been a partner of the Safe team since 2017, contributed directly to its core codebase, and hold official Safe Guardian and Safe Wallet Partner status, which gives us quick PR-review access and close technical collaboration with the Safe core team.

Solhint

Our credentials include maintaining Solhint, the open-source Solidity linter used by 1M+ developers, and running a top-3 indexer in The Graph ecosystem.

Smart Contract Development

Protofire is a smart contract development company that has deployed 250+ projects since 2016, across Ethereum and 120+ EVM networks, Solana, and Cardano. We've built and maintained production contracts alongside Chainlink, MakerDAO, The Graph, Safe, Aave, and the Ethereum Foundation.

Quick Facts

Multilingual Team

10 years in business

Team Breakdown

Smart Contract & Protocol Engineering (30)
DeFi & On-chain Finance (15)
Infrastructure & DevOps (15)
Dew Point Labs (Safe, Uniswap, Blockscout) (10) +4 Teams

Tools and Technology

Google Meet
ClickUp
Notion
Google Drive
BambooHR
Fireflies.ai
GitHub
Calendly
Figma
Vercel
Loom
Slack

Commonly Asked Questions

We build and operate the financial infrastructure that protocols and institutions run on. That covers the whole lifecycle of on-chain finance, across many primitives and the systems that tie them together. Lending markets on audited Aave v3 contracts, tokenized funds are all active areas for us right now. We also take on work that sits further out on the edge of the category. Embedded leverage and autonomous agent liquidity for prediction markets, parametric protection for tokenized RWAs used as collateral, compliance-ready privacy infrastructure with selective disclosure, and cross-border stablecoin settlement corridors for banks and payment providers. The common thread is engineering that produces a real economic outcome: deeper liquidity, usable token utility, or a market that can finally absorb institutional capital. The clients we work best with usually have a token or an asset that exists but isn’t doing enough economic work yet, and a specific structural problem behind it. A PoS chain with idle staked capital. An RWA issuer with no compliant secondary market. A prediction market that goes quiet between events. A payments company defending a corridor against same-day settlement. There’s a second category we take on constantly: running the systems after they ship. Once a protocol or an institution has live money on public infrastructure, someone has to handle monitoring, incident response, and upgrades on systems where mistakes are expensive and there’s no rollback. We provide that as a managed function for teams whose engineers shouldn’t be the ones carrying the pager. We’re less interested in one-off feature work or generic development. The projects that fit us are the ones where the architecture directly shapes whether the system earns trust and scales.

We’ve deployed across 60+ networks since 2016, spanning EVM chains, Cosmos-based PoS networks, and app-specific L2s. That includes established ecosystems like Ethereum, Arbitrum, Base, BNB Smart Chain, Optimism, and Gnosis Chain, as well as newer chains where we help bootstrap the financial layer from the start. Our work tends to go deep in a few ecosystems rather than spreading thin. We’ve contributed to Aave, Balancer, MakerDAO, Safe, Optimism, and the Ethereum Foundation, and we maintain 30+ Chainlink integration repositories. We’re chain-agnostic by design, so the right answer for a given project depends on where your liquidity, users, and collateral actually live, not on a network we happen to prefer.

Building in-house makes sense when the infrastructure is your core differentiator. For most teams, a lending market, an LST, or an OTC venue is not that. It’s commodity plumbing that still carries a real, recurring cost: security audits, oracle operations, liquidity bootstrapping, 24/7 liquidations, risk parameterization, and tail-risk liability that never goes away. The trap is underestimating the operational side. Shipping the contracts is the visible cost. Running them safely, around the clock, against motivated attackers, is the one that compounds. When you buy proven infrastructure, you keep your senior engineers on the product that actually sets you apart and move to launch in weeks rather than quarters. When the architecture genuinely is your edge, we’ll tell you to build it, and help you build it well.

We’re an engineering partner that architects and operates financial infrastructure. An audit reviews whether an existing system is safe. A development agency builds to a spec you hand them. We start from the economic problem, design the system that solves it, ship it to production standards, and in many cases keep running it afterward. That end-to-end ownership matters most on high-stakes financial systems, where the design itself determines whether the system holds up once real capital and real adversaries arrive. Security and reliability run through everything we do because institutional money demands it, and they serve a larger goal: infrastructure that makes an asset productive and an ecosystem deeper.

Yes. Most of the risk in an on-chain system shows up after launch, so operating it is a core part of what we do. Deploying to mainnet exposes a set of problems that don’t exist in development: there’s no rollback on a bad upgrade, counterparties are adversarial, and the attack surface runs across validators, RPC, indexers, oracle feeds, and liquidation bots. We offer managed on-chain operations as a dedicated function: 24/7 monitoring, incident response, and key and upgrade operations, run inside a pre-agreed authority matrix so everyone knows who acts, with what permission, in what order. We integrate with the detection tooling you already use rather than replacing it, and you keep the product, the funds, and the regulatory perimeter throughout. It’s the difference between an alert firing and someone actually answering it correctly at 3am.

Locations (1)

830 Stewart Dr., Suite 119 Sunnyvale, CA, United States 94085

16 - 20

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