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Senior Backend Engineer

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Biconomy

Worldwide
Full-TimeWorldwide

Job Description

Biconomy empowers Web3 developers to build seamless, user-friendly dApps that work effortlessly across multiple blockchains. Our battle-tested modular account and execution stack eliminates traditional UX friction points, helping projects accelerate user adoption while reducing development costs. By processing over 50 million transactions across the 300+ dApps we've served, we're powering the future of onchain economies.

The Role - Build the Protocol Powering the Future of Web3

As a Senior Backend Engineer on our Modular Execution Environment (MEE) team, you’ll help architect and scale the MEE protocol - a modular execution layer for advanced blockchain operations designed to horizontally scale blockchains in a multi-chain world. This is not just application development - you’ll be building foundational infrastructure that underpins decentralized, cross-chain supertransactions and smart account interactions.

You’ll work across the entire MEE stack

  • MEE Protocol - Develop the decentralized network and cryptoeconomic systems, working on P2P communication, slashing mechanisms, and storage proofs.
  • MEE Network Infrastructure - Build the foundational infrastructure, from bundlers to validators, supporting the MEE protocol’s decentralization roadmap.
  • Backend & Indexers - Design complex systems to aggregate, index, and interpret on-chain and off-chain data, powering real-time cross-chain operations.
  • Implementing Supertransactions - Develop and refine a novel data type that defines cross-chain operations (EVM and non-EVM). Supertransactions aggregate multiple on-chain and off-chain interactions into a Merkle tree, enabling seamless, complex multi-chain execution.

What You Will Be Doing

  • Protocol Development - Contribute to core MEE protocol components, including slashing mechanisms, cryptoeconomic design, and validator infrastructure.
  • Infrastructure Design - Build the backend infrastructure that facilitates MEE’s transition from centralized to fully decentralized P2P execution.
  • Indexers & Aggregation - Develop and optimize indexing services that process and aggregate data across multiple blockchains into abstract supertransaction models.
  • Cross-Chain Execution - Design systems to handle seamless cross-chain flows, enabling developers to execute complex, multi-chain transactions with minimal overhead.
  • Scalable Backend Systems - Implement scalable microservices, APIs, and backend solutions to support high-throughput, low-latency blockchain interactions.
  • Collaborate on Cutting-Edge Tech - Work with blockchain engineers, cryptographers, and product teams to integrate novel technologies like storage proofs, intent-based bridges, and gossip networks.

Requirements

  • Experience: 3+ years of backend development with a focus on blockchain protocols, infrastructure, or decentralized networks.
  • Tech Stack: Proficiency in JavaScript/TypeScript, Node.js and Web3 frameworks (Ethers.js, viem).
  • Blockchain Expertise: Deep understanding in any of the following:
  • Account Abstraction (AA)
  • 4337 Bundlers
  • Smart Accounts & EIP7702
  • Storage Proofs (e.g., Herodotus)
  • Intent-Based Bridges (e.g., Across, Connext)
  • Cross-Chain Messaging (e.g., Axelar, LayerZero)
  • Gossip Networks & P2P Systems
  • Liquidity Fronting
  • MEV, Flashbots & UserOps
  • Merkle Trees, Sequencers & Rollups
  • Backend Mastery: Experience building high-performance, scalable infrastructure and working with decentralized architectures.
  • Collaborative Approach: Proven ability to work cross-functionally across protocol, backend, and product teams in a fast-paced, iterative environment.

Nice-to-Have

  • Contributions to open-source blockchain infrastructure projects.
  • Familiarity with optimistic rollups, zk-rollups, or modular execution environments.
  • Experience developing validators, bundlers, or sequencers in a P2P blockchain environment.
  • Understanding of MEV mitigation, frontrunning, and cross-chain arbitrage solutions.
  • Familiarity with Rust and/or Go

What We Offer

  • Flexible Working Hours: Enjoy autonomy over your schedule.
  • Generous Vacation Policy: 25 days vacation per year plus public holidays.
  • Competitive Salary: With regular performance reviews.
  • Token Allocation: Be rewarded with tokens as part of our compensation package.
  • Growth Opportunities: Be part of an exciting new project with significant career growth potential.
  • Innovative Work Culture: Join a team that’s at the cutting edge of Web3, AI, and DeFi, and help shape the future of the digital economy.
  • Fun and Engaging Team Activities: Game nights, virtual celebrations, and work retreats to keep things exciting.

At Biconomy, we believe in creating a diverse and inclusive workplace. We are committed to being an equal-opportunity employer, and we do not discriminate based on race, national origin, gender, gender identity, sexual orientation, disability, veteran status, age, or any other legally protected status.