Ruby on Rails Developer

About This Role

About the Role

We're looking for a Senior Ruby on Rails Engineer who's worked in the blockchain and crypto space. You won't just be writing code — you'll own the backend architecture of our crypto platform, make technical decisions that shape the product, and work closely with the team to ship features that interact directly with blockchain infrastructure.

This is a hands-on senior role. You'll be the person the team looks to when things get technically complex, whether that's designing APIs that talk to smart contracts, optimizing a database that handles thousands of transactions, or figuring out how to integrate a new DeFi protocol into the platform.

What you'll be doing

Owning and evolving the Rails backend that powers our crypto platform

Designing and building APIs that integrate with blockchain networks, smart, Contracts, wallets, and token systems

Making architecture decisions around scalability, reliability, and performance

Working with DEX, CEX, and DeFi infrastructure at the backend level

Building and maintaining crypto transaction flows — deposits, withdrawals,trading, settlement

Optimizing database queries, background jobs, and system performance as we scale

Reviewing code, mentoring junior engineers, and raising the bar for engineering quality

Collaborating with product, frontend, and blockchain teams to ship end-to-end features

Identifying technical debt and proactively improving the codebase

What we're looking for

5+ years of experience with Ruby on Rails in production environments

Proven experience working on blockchain or crypto products — not theoretical, hands-on

Strong understanding of blockchain fundamentals — smart contracts, wallets, transactions, consensus mechanisms

Experience integrating with blockchain networks (Ethereum, Solana, Polygon, or similar)

Solid grasp of RESTful API design, database modeling, and backend architecture patterns

Comfortable with PostgreSQL, Redis, Sidekiq, and the standard Rails ecosystem

Experience with crypto-specific workflows like wallet integration, on-chain/off-chain data handling, or token management

You take ownership of problems and don't wait to be told what to do

Strong communication skills — you can explain technical decisions clearly to

both engineers and non-engineers

Nice to have

Experience with Solidity, Rust, or smart contract development

Worked on DEX or CEX platforms

Familiarity with DeFi protocols — lending, staking, AMMs, yield strategies

Experience with Web3 libraries (ethers.js, web3.rb, or similar)

Worked with blockchain nodes, indexers, or on-chain analytics

Built or maintained trading engines or order book systems

Experience with Docker, Kubernetes, AWS, or similar infrastructure tools

Led or mentored a small engineering team

What we offer

Opportunity to work on a real crypto platform from the ground up in one of the

fastest-growing blockchain hubs in the world

A small, senior team where your work has direct impact on the product

Abu Dhabi — a growing tech and crypto hub with great quality of life