DeFi Engineer – Protocol

About Tokka Labs

Tokka Labs is a proprietary trading firm specializing in digital assets within the blockchain space. Founded in 2022 and based in Singapore, we are pioneers in digital asset trading, focusing on close collaboration, rigorous research, and cutting-edge technology. As experienced market makers for top protocols on popular blockchains, we enhance market efficiency by identifying and arbitraging mis-pricings, while providing liquidity in the blockchain ecosystem. We are committed to innovation and excellence in the fast-paced world of decentralized finance (DeFi), on-chain, and cross-chain trading.

About the Role

We are seeking a DeFi Engineer to drive protocol integrations and scale our trading infrastructure across multiple blockchains. This role covers the full gamut of DeFi trading from the development of data pipelines and smart contracts to the low-latency off-chain execution infrastructure. You will work closely with trading and research teams to ensure our systems are fast, reliable, and scalable across Ethereum and L2s, as well as other non-EVM ecosystems.

Key Responsibilities

• Design and develop robust integrations with leading DeFi protocols
• Write and operate gas-efficient smart contracts to better interact with other protocols
• Optimize the execution pipelines for each chain (e.g. order routing and transaction broadcasting)
• Monitor and tune systems to benchmark and improve performance
• Ensure that systems are resilient and follow best practices

Qualifications

• Experience in DeFi protocol integration and smart contract development.
• Proficiency in backend/system programming languages (Rust, Typescript preferred).
• Solid understanding of blockchain environments such as EVMs, SVMs and MVMs.
• Experience in the development of latency-sensitive systems, ideally in the trading domain.
• Experience with monitoring and performance tuning (Prometheus, Grafana, custom latency metrics).

Nice to Have

• Experience with HFT market-making.
• Contributed to DeFi or blockchain projects.
• Familiarity with MEV ecosystems, builder marketplaces, and advanced blockchain execution techniques.
• Experience scaling across heterogeneous blockchain environments.