Career Opportunities

Web3 Wallet Backend Engineer (DEX Aggregator Backend)

Published on 2026-02-04 11:07

Design and implement core backend services for the DEX aggregator.
- Define the overall technical architecture and core transaction flows of the DEX aggregator.
- Design key logic including routing, price quoting, slippage control, fee calculation, and fallback handling for failed transactions.
- Produce complete technical design documents, organize reviews, and drive implementation.

Integrate and optimize connections with on-chain protocols.
- Interface with major DEX protocols such as Uniswap V2/V3, PancakeSwap, SushiSwap, Curve, Balancer, etc.
- Support multi-chain environments including Ethereum, BSC, Arbitrum, Base, Polygon, and others.
- Implement multi-pool, multi-path order splitting and optimal price routing strategies.

Design and implement the full on-chain swap execution pipeline.
- Build transaction workflows covering construction, simulation, signing, broadcasting, and receipt confirmation.
- Collaborate with wallet, account, signing, and gas strategy services.
- Ensure high transaction success rates, fast confirmations, and robust exception handling and rollback mechanisms.

Build stability and security mechanisms for the DEX aggregator services.
- Work with risk control and security teams to design transaction risk controls, rate limiting, blacklists, and anomaly detection mechanisms.
- Mitigate risks such as price manipulation, MEV, slippage attacks, replay attacks, and other on-chain threats.
- Ensure stable operation under high concurrency and high-frequency trading scenarios.

Maintain strong engineering discipline and collaboration skills.
- Follow best practices in code quality, unit testing, and technical documentation.
- Work closely with frontend, wallet, risk, and product teams to deliver high-quality releases.

Bachelor’s degree or above in Computer Science or a related field, with a solid foundation in data structures, operating systems, networking, and concurrent programming.
Strong proficiency in Java, with experience building large-scale backend systems.
Deep understanding of backend architecture design, with hands-on experience delivering high-concurrency, high-availability, and scalable systems.
Proficiency with common middleware and infrastructure, including MySQL / PostgreSQL, Redis, message queues, RPC frameworks, Docker, and Kubernetes.
Familiarity with on-chain data structures and blockchain RPC interfaces.
Strong understanding of the full lifecycle of on-chain transactions: construction, simulation, signing, broadcasting, and confirmation.
In-depth knowledge of major DEX mechanisms, including but not limited to Uniswap V2 / V3 (AMM, CLMM, ticks, and liquidity distribution).
Understanding of MEV risks, front-running, sandwich attacks, and common mitigation strategies.

Hands-on experience with DEX aggregators, wallets, exchanges, or DeFi protocol projects.
Experience with non-EVM chains such as Solana, Sui, or Aptos is a strong plus.
Familiarity with EIP-4337 (Account Abstraction wallets), Permit, Meta-Transactions, and other emerging transaction models.
Proven experience in performance optimization, improving transaction success rates, or cost optimization.
Experience with technical knowledge sharing, technical documentation, or open-source contributions.

Kindly click the link below if you are interested in applying for this position or referring a suitable candidate.

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Published on 2026-02-04 11:07

Design and implement core backend services for the DEX aggregator.
- Define the overall technical architecture and core transaction flows of the DEX aggregator.
- Design key logic including routing, price quoting, slippage control, fee calculation, and fallback handling for failed transactions.
- Produce complete technical design documents, organize reviews, and drive implementation.

Integrate and optimize connections with on-chain protocols.
- Interface with major DEX protocols such as Uniswap V2/V3, PancakeSwap, SushiSwap, Curve, Balancer, etc.
- Support multi-chain environments including Ethereum, BSC, Arbitrum, Base, Polygon, and others.
- Implement multi-pool, multi-path order splitting and optimal price routing strategies.

Design and implement the full on-chain swap execution pipeline.
- Build transaction workflows covering construction, simulation, signing, broadcasting, and receipt confirmation.
- Collaborate with wallet, account, signing, and gas strategy services.
- Ensure high transaction success rates, fast confirmations, and robust exception handling and rollback mechanisms.

Build stability and security mechanisms for the DEX aggregator services.
- Work with risk control and security teams to design transaction risk controls, rate limiting, blacklists, and anomaly detection mechanisms.
- Mitigate risks such as price manipulation, MEV, slippage attacks, replay attacks, and other on-chain threats.
- Ensure stable operation under high concurrency and high-frequency trading scenarios.

Maintain strong engineering discipline and collaboration skills.
- Follow best practices in code quality, unit testing, and technical documentation.
- Work closely with frontend, wallet, risk, and product teams to deliver high-quality releases.

Bachelor’s degree or above in Computer Science or a related field, with a solid foundation in data structures, operating systems, networking, and concurrent programming.
Strong proficiency in Java, with experience building large-scale backend systems.
Deep understanding of backend architecture design, with hands-on experience delivering high-concurrency, high-availability, and scalable systems.
Proficiency with common middleware and infrastructure, including MySQL / PostgreSQL, Redis, message queues, RPC frameworks, Docker, and Kubernetes.
Familiarity with on-chain data structures and blockchain RPC interfaces.
Strong understanding of the full lifecycle of on-chain transactions: construction, simulation, signing, broadcasting, and confirmation.
In-depth knowledge of major DEX mechanisms, including but not limited to Uniswap V2 / V3 (AMM, CLMM, ticks, and liquidity distribution).
Understanding of MEV risks, front-running, sandwich attacks, and common mitigation strategies.

Hands-on experience with DEX aggregators, wallets, exchanges, or DeFi protocol projects.
Experience with non-EVM chains such as Solana, Sui, or Aptos is a strong plus.
Familiarity with EIP-4337 (Account Abstraction wallets), Permit, Meta-Transactions, and other emerging transaction models.
Proven experience in performance optimization, improving transaction success rates, or cost optimization.
Experience with technical knowledge sharing, technical documentation, or open-source contributions.

Kindly click the link below if you are interested in applying for this position or referring a suitable candidate.