--- title: "Custom Blockchain Development | Web3, NFT, DeFi Solutions | Unknown Gravity" url: "https://www.unknowngravity.com/en/servicios/desarrollo-blockchain" site: Unknown Gravity published: "2026-06-23T14:55:52+00:00" modified: "2026-06-23T15:18:34+00:00" language: en-US section: "Home > Services > Custom Blockchain Development | Web3, NFT, DeFi Solutions | Unknown Gravity" --- # Custom Blockchain Development | Web3, NFT, DeFi Solutions | Unknown Gravity > Blockchain development is the building of software on distributed ledger networks: smart contracts, tokens, decentralized applications and integrations with existing systems. It applies when several parties need to share a common record without depending on a single intermediary. Unknown Gravity builds these projects to order from Spain. At Unknown Gravity, we’re not just blockchain developers. We are passionate about blockchain technology. 0 PRODUCTION HACKS SECURITY BY DESIGN EVM · L1 · L2 [Tell us about your project](/en/meeting) Explore the 39 services Blockchain development is the building of software on distributed ledger networks: smart contracts, tokens, decentralized applications and integrations with existing systems. It applies when several parties need to share a common record without depending on a single intermediary. Unknown Gravity builds these projects to order from Spain. WE MASTER YOUR CHAIN ## Expert development across every ecosystem. [Ethereum](/en/blockchain/desarrollo-blockchain-ethereum) [Polygon](/en/blockchain/desarrollo-blockchain-polygon) [Base](/en/blockchain/desarrollo-blockchain-base) [Arbitrum](/en/blockchain/desarrollo-blockchain-arbitrum) [Optimism](/en/blockchain/desarrollo-blockchain-optimism) [Avalanche](/en/blockchain/desarrollo-blockchain-avalanche) [BNB](/en/blockchain/desarrollo-blockchain-bnb-chain) [Bitcoin](/en/blockchain/desarrollo-blockchain-bitcoin) EVM & MORE L1 · L2 Already know your chain? Tell us what you want to build on it. [Tell us about your project](/en/meeting) ALL SERVICES ## 39 ways to take your project into another orbit. ## 01 / Tokenization [Security Tokens (STO)](/en/servicios/security-tokens) [Stock tokenization: Convert your shares into tokens](/en/servicios/convierte-tus-acciones-en-tokens) [Tokenization of real estate](/en/servicios/tokenizacion-de-inmuebles) [Asset tokenization](/en/servicios/tokenizacion-activos) [Tokenization of financial assets](/en/servicios/tokenizacion-activos-financieros) [Tokenization of precious metals](/en/servicios/tokenizacion-metales-preciosos) [Tokenization of energy and renewable assets](/en/servicios/tokenizacion-energia-activos-renovables) [Data tokenization](/en/servicios/tokenizacion-de-datos) [Real World Assets (RWA)](/en/servicios/real-world-assets-rwa) [Digital Assets](/en/servicios/activos-digitales) [Token issuance](/en/servicios/emision-de-tokens) [Development of tokenization platforms](/en/servicios/desarrollo-de-plataformas-de-tokenizacion) [White label tokenization platform](/en/servicios/plataforma-tokenizacion-marca-blanca) [Tokenized issuance management software](/en/servicios/software-gestion-emisiones-tokenizadas) [ERIR platform for token registration and control](/en/servicios/plataforma-erir-para-registro-control-de-tokens) ## 02 / Development [DApp Development: Decentralized Applications](/en/servicios/aplicaciones-descentralizadas-dapps) [Development of smart contracts](/en/servicios/company-development-smart-contracts) [Smart contract auditing](/en/servicios/blockchain-security-audits) [Cryptocurrency development](/en/servicios/desarrollo-de-criptomonedas) [Token development](/en/servicios/desarrollo-de-tokens) [Blockchain protocol development](/en/servicios/desarrollo-de-protocolos-blockchain) [Development for Ethereum (EVM)](/en/servicios/desarrollo-para-ethereum-evm) [Web3 Development](/en/servicios/desarrollo-web3) [DeFi protocols](/en/servicios/protocolos-defi) [Create NFT collections](/en/servicios/colecciones-nft) [Marketplace Development for NFT](/en/servicios/desarrollo-marketplaces-nft) [Private blockchains](/en/servicios/blockchain-privadas) [Blockchain as a Service (BaaS)](/en/servicios/blockchain-como-servicio-baas) [Crypto Payment Gateway](/en/servicios/pasarela-de-pagos-crypto) [Decentralized storage](/en/servicios/soluciones-de-almacenamiento-descentralizado) [Product traceability](/en/servicios/sistema-trazabilidad-de-productos) ## 03 / Consulting and use cases [Blockchain consulting for companies](/en/servicios/asesoria-blockchain) [Blockchain consulting in Spain](/en/servicios/consultoria-blockchain) [NFT Consulting](/en/servicios/consultoria-nft) [Whitepapers](/en/servicios/whitepapers) [Tokenomics](/en/servicios/tokenomics) [Digital Identity Management](/en/servicios/blockchain-para-gestion-de-identidades-digitales) [Voting and Governance](/en/servicios/blockchain-para-votaciones-y-gobernanza) [Blockchain for Health](/en/servicios/blockchain-para-salud) Does your project also need visibility? [Digital marketing for Web3](/en/servicios/marketing-digital) WHY UNKNOWN GRAVITY ## Why choose us? It’s easy. 01 ### Demonstrated experience Outstanding experience collaborating with leading companies from different countries. 02 ### Personalized approach Each client has unique needs, and we create solutions that are 100% adapted to your vision. 03 ### Security demonstrated Our processes include comprehensive audits to guarantee your project. 04 ### Efficiency and scalability We design platforms that grow with you, optimizing each line of code. PROOF OF DELIVERY ## Delivered and on mainnet. [TOKENIZATION Hokenfi Asset tokenization platform with the ERIR framework, running in production. hokenfi.com](https://hokenfi.com) [PROPTECH AIPher Agent platform for property management companies. aipher.app](https://aipher.app) THIS WEBSITE ### Unknown Gravity Our own WordPress build, designed and developed in-house. PSI 97/100