> Markdown version of [/jobs/ext/1468173-blockchain-engineer](https://www.wearedevelopers.com/jobs/ext/1468173-blockchain-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Blockchain Engineer

- **Company:** Mlabs Ltd
- **Location:** Madrid, Spain (Remote available)
- **Salary:** €160,000.0
- **Contract:** Permanent contract
- **Skills:** Private Networks, Application Programming Interfaces (APIs), C++ (Programming Language), Databases, Continuous Integration, Data Systems, Amazon DynamoDB, PostgreSQL, NoSQL, Blockchain, Software Engineering, Systems Integration, TypeScript, Computer Networking Systems, Indexer, Ethereum, Build Tools, Api Design, Data Pipelines
- **Published:** July 28, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

+ Experience: 8+ years of software engineering experience, with 2+ years specialized in blockchain development.
 + Core Languages: Strong proficiency in TypeScript, plus ideally one systems language (e.g., Rust, Go, C++).
 + Blockchain Tooling: Proven experience building blockchain indexers, explorers, or related tooling.
 + Smart Contract Expertise: Skilled in designing and auditing smart contracts (EVM and non-EVM experience is a plus).
 + Ecosystem Breadth: Familiarity with multiple blockchain ecosystems, including major public networks (Ethereum, Solana, Cosmos, etc.) and private/enterprise networks.
 + Data Systems: Expertise with databases (PostgreSQL, DynamoDB, NoSQL) and high-throughput data pipelines.
 + Security: Strong understanding of blockchain security, cryptography, and consensus models.
 + Communication: Clear communicator with experience collaborating effectively across product and infrastructure teams.

## Description

Join a stellar team of leaders and experts in blockchain technology, cryptography, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Senior Blockchain Engineer to lead the design, development, and scaling of the components that connect our platform to every major blockchain network. This role is both hands-on and strategic, focusing on speed, resilience, and security under high-stakes financial workloads.
You will own the entire lifecycle of blockchain integrations, from low-level data indexing to high-level API design and smart contract development. You will improve our indexing and monitoring infrastructure, ensure secure integrations across diverse networks, and build tools that make our wallet platform faster and easier for partners to adopt., + Integrations & Data Pipelines: Design and implement blockchain indexers, data pipelines, and network integrations across major public and private networks.

 + Smart Contract Development: Develop and maintain smart contracts with a strong focus on security, performance, and reliability.
 + API & Services: Build robust APIs and services that efficiently expose on-chain data for consumption by wallets and financial applications.
 + Performance & Reliability: Troubleshoot indexing issues, resolve performance bottlenecks, and contribute to CI/CD, monitoring, and observability for blockchain services.
 + Strategy & Collaboration: Collaborate with product and research teams to prioritize new blockchain integrations and support technical discussions with external partners.


## Related Videos

- [Developer’s Perspective: Overview of the Tezos Blockchain Ecosystem](https://www.wearedevelopers.com/videos/237-developer-s-perspective-overview-of-the-tezos-blockchain-ecosystem)
- [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis)
- [Optimizing Discovery: PostgreSQL's Role in Transforming GetYourGuide's Search](https://www.wearedevelopers.com/videos/1647-optimizing-discovery-postgresql-s-role-in-transforming-getyourguide-s-search)
- [SSO with Ethereum and Next JS](https://www.wearedevelopers.com/videos/288-sso-with-ethereum-and-next-js)
- [Blockchain, NFT and smart contracts for my application](https://www.wearedevelopers.com/videos/877-blockchain-nft-and-smart-contracts-for-my-application)
- [Smart Contract fundamentals - My first DApp](https://www.wearedevelopers.com/videos/52-smart-contract-fundamentals-my-first-dapp)

## Related Articles

- [7 tips on how to become a blockchain developer](https://www.wearedevelopers.com/magazine/53-7-tips-on-how-to-become-a-blockchain-developer)
- [Why Blockchain? A Developer’s Perspective](https://www.wearedevelopers.com/magazine/616-why-blockchain-a-developer-s-perspective)
- [From Hype to Code: Real Blockchain Use Cases for Developers](https://www.wearedevelopers.com/magazine/620-from-hype-to-code-real-blockchain-use-cases-for-developers)
- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)
- [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe)