“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
Blockchain development. Built for production.
We are a blockchain development company with an in-house team. We design the architecture and build your product, from smart contracts to the user experience.
They trust Metlabs with their blockchain projects
Why now
The new rails are already in production.
Major financial institutions are no longer testing blockchain. They are deploying it to move assets and payments. The question for your company is not whether it will arrive, but which infrastructure to enter with. We build that layer for your product.
Services
Blockchain development services
Blockchain development means designing, building and taking to production a product whose rules and records live on a blockchain network, from the smart contracts to their integration with the company's systems. We organize it into three service families, each with its own page.
Connect your operations
Represent assets and rights
Methodology
How we build your blockchain product
Four phases, each with a concrete deliverable. We decide what belongs on-chain before writing code, and nothing reaches production without testing and review.
We define the use case, dependencies and risks, and decide which part of the product should live on-chain. You leave with a prioritized scope and a roadmap.
We choose the network, the permission model and the product flows, and prototype the screens to validate them against your operations before building.
Our in-house team builds contracts, backend and interface in iterations. Every code delivery ships with its tests and a peer review.
We test security, permissions and performance, close the audit findings and deploy to mainnet with documentation and a maintenance plan.
FAQ
Frequently asked questions about blockchain development
What we are asked before a development project starts.
Talk to our teamWhat does a blockchain developer do?
A blockchain developer writes and tests the smart contracts that set a product's rules on the network, and the software that connects them to the rest of the system. On a real project they work alongside architecture, backend, frontend and security, because a deployed contract cannot be patched like a website and every change needs testing and review.
What is enterprise blockchain development?
It is blockchain development built around a company's existing operations. It covers role-based permissions and integration with systems such as an ERP or a core banking platform, within each sector's regulatory requirements. The network can be public or permissioned. What defines it is who can operate, what is recorded on-chain and how it connects to the company's systems.
How much does blockchain development cost?
It depends on scope. An MVP with one contract and an interface is nothing like a platform with several upgradeable contracts, integrations with your systems and an external audit. That is why we quote a fixed scope at the end of the discovery phase, once the network, the architecture and the on-chain part of the product are decided.
How do you hire a blockchain development company?
Ask for products running in production, not demos, and check that the team writing the code is in-house rather than subcontracted. Ask how contracts are tested and reviewed, who signs deployments and whether the code is prepared for an external audit. A serious partner will also tell you when your product does not need a blockchain. Read our guide to comparing blockchain development companies.
Technologies and networks for blockchain development
Operating costs, permissions and integrations guide the choice of network and tools. Here is part of the stack we build with.
- Solidity
The smart contract language for verifiable rules on EVM networks.
- Rust
Performance and memory safety for contracts, nodes and Web3 tooling.
- Ethereum
EVM contracts, tokens and final settlement on an open Proof of Stake network.
- Solana
Programs, accounts and parallel execution on a high-throughput layer 1.
- Polygon
Polygon PoS: EVM contracts secured by its own validators, with low fees.
- Arbitrum
Arbitrum One: EVM execution and layer 2 tooling on top of Ethereum.
- Hardhat
An environment to compile, test and deploy contracts on EVM networks from Node.
- Foundry
Solidity tests, invariant fuzzing and command-line tooling for EVM networks.
- Chainlink
Oracles for external data, randomness and cross-chain messaging for contracts.
Reviews
What do our clients think of Metlabs?
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
Team
In-house blockchain development team
Metlabs is a blockchain development company based in A Coruña, Spain. An in-house team covers every part of the project, from product and engineering to infrastructure and legal fit. The people who design your architecture write, test and deploy the code.
Meet the team- Projects in production
- +30
- In tokenized assets
- +$40M
- In‑house development
- 100%
Isaac González
Head of Innovation
Carlos Peña
Full Stack Engineer
Pablo Castro
DevOps Engineer
Helena Ramos
Product Designer
Javier Yáñez
Legal
Security
Security in blockchain development, from code to keys
An audit reviews the smart contract's code, but many attacks exploit no vulnerability in the contract at all. The attack vector is a compromised private key or a manipulated signing process. That is why we treat code, permissions and operations as a single attack surface, and mitigate each risk before the production deployment.
Security incidents in 2026
$1.27B
lost in 253 security incidents in the third quarter of 2026, 54.5% more than in the second
October 2026
52
physical attacks forcing crypto asset holders to hand over funds or keys in the first half of 2026, 33% more than a year earlier
October 2026
Access control
Every critical function is restricted to an explicit role. When the product's risk justifies it, admin operations require a multisig and a timelock.
ContractKeys and signing
We define who signs each deployment and admin operation, where the keys are held in custody and how a compromised key is rotated.
OperationsLogic and edge cases
Unit and invariant tests, fuzzing and static analysis look for reentrancy and states the design did not anticipate. Every finding is fixed and tested again.
ContractUpgradeable contracts
If the contract is upgraded through a proxy, we review initialization and storage layout in every version. If it does not need upgrades, it is deployed immutable.
ContractOracles and integrations
We analyze what happens if an oracle returns a manipulated or stale price, or an external service fails, and we limit the impact in the contract itself.
IntegrationsGoing live
We verify the source code on the block explorer, so anyone can check what was deployed, and agree with you on monitoring and incident response.
Operations
We work with leading audit firms
Industries
Blockchain development for your industry.
Every industry comes with its own rules: who can operate, what must be recorded and who you answer to. These are some of the industries where we apply blockchain, with what it solves in each one.
Where we are
We're your blockchain development company in:
Metlabs Offices
Av. García Sabell, 1, Edificio Proa 15009 A Coruña, Spain
We build blockchain projects in
SpainUnited StatesUAEUnited KingdomMexicoSingaporeAustraliaSwitzerlandColombiaArgentinaChilePeruPortugalGermanyHong KongBrazilEcuadorFranceIndiaPanamaAndorraAustriaBahrainBelgiumBoliviaCanadaCosta RicaCubaCyprusCzechiaDenmarkDominican RepublicEl SalvadorEstoniaFinlandGreeceGuatemalaHondurasHungaryIrelandIsraelItalyJapanKuwaitLiechtensteinLithuaniaLuxembourgMaltaMonacoMoroccoNetherlandsNew ZealandNicaraguaNigeriaNorwayOmanParaguayPolandPuerto RicoQatarRomaniaSan MarinoSaudi ArabiaSeychellesSouth AfricaSouth KoreaSwedenTurkeyUruguayVenezuela
Explore the rest of our services
Development is one part of the journey. We support companies across the full lifecycle of a blockchain project, from strategy to production.
Blockchain training
We train your team to decide on blockchain with independent judgment, through tailored programs for technical and business roles.
Blockchain consulting
We analyze your project, validate its viability and design the technology strategy with a clear roadmap for execution.
Blockchain regulation
We guide you through regulation and compliance, translating legal requirements into programmable on-chain functionality.
Asset tokenization (RWA)
We tokenize your assets with ERC-3643 smart contracts, KYC/AML and on-chain governance to fractionalize them and raise capital.
Smart contract auditing
We audit your smart contracts: we validate the logic, detect vulnerabilities and deliver an actionable report before mainnet.
Blog
Articles on blockchain development
How to build a dApp: architecture, contracts and deployment
A guide to designing a complete dApp: what belongs on-chain, how to connect wallets, what to test and how to operate after launch.
Smart contract certification: what an audit demonstrates
What a smart contract audit should cover, how to verify its scope and why a report cannot guarantee security or legal compliance.
Hardhat vs Foundry: which to choose in 2026
Solidity and TypeScript tests, fuzzing, plugins and deployments: criteria for comparing Hardhat 3 and Foundry without context-free benchmarks.
Let's build the rails for your product.
Tell us what you want to launch and where you are today. We start with the scope and the technical decisions you need to resolve.
