Headline

Technical Lead with 5+ years | Blockchain | DeFi | Protocol Design | Smart Contracts | Security Reviews | L2 ZK-Rollup | Cryptography | Solidity | Rust | Cairo | Go | Ethereum | Starknet | Solana | ETHGlobal StarkHack 🏆

About

I’m a Blockchain and Protocol Engineer with 5+ years of experience designing, developing, and scaling blockchain, DeFi, and trading systems across EVM and non-EVM ecosystems. My experience covers protocol engineering, smart contract development, security reviews, distributed systems, backend infrastructure, on-chain data, and full-stack Web3 applications. I began my blockchain career at GuardianLink, working on Ethereum, BNB Chain, and Polygon-based applications, smart contracts, NFT marketplaces, wallet integrations, and token standards including ERC-20, ERC-721, and ERC-1155. I also conducted DeFi research and evaluated blockchain protocols and architectures for product requirements. At Hashstack, I contributed to a DeFi lending and borrowing protocol on Starknet, working on Solidity-to-Cairo smart contract migration, protocol development, security reviews aligned with SWC standards, and unit and end-to-end testing. The protocol surpassed $1M in Total Value Locked following its mainnet launch. At Nethermind, I worked on blockchain research and cryptographic infrastructure, including STARK proving and verification, performance benchmarking, and optimization of cryptographic components using Rust, Cairo, and C++. This work involved zero-knowledge systems, proving infrastructure, and performance-critical blockchain implementations. In recent roles with Filament Finance and Bento.fun, I have led engineering initiatives across DeFi and trading products, including perpetual DEXs, prediction markets, liquidity and staking systems, settlement infrastructure, real-time market operations, and full-stack Web3 apps. My work has covered protocol and smart contract development, backend and event-driven architectures, blockchain integrations, on-chain data, and production infrastructure. My technical expertise includes Solidity, Cairo, Rust, TypeScript, Node.js, NestJS, Next.js, PostgreSQL, MongoDB, Supabase, Redis, AWS, and Web3 tooling, with hands-on experience across EVM and Non-EVM ecosystem. Key achievements include contributing to Bento.fun, which received 2nd Prize in Base Batches 001 with a $40,000 award, and developing FractalShares, which received a $17,000 prize for Best Use of Diamante Net in DeFi & NFTs. I have also earned recognition through multiple blockchain hackathons, including Starknet and ETHGlobal events. I build secure, scalable blockchain systems at the intersection of protocol engineering, smart contract security, distributed systems, cryptographic research, and product management. Reach me out: rajeebk.malik@gmail.com +91 7002815819

Location

Bengaluru

AI stack

claude code

cursor

github copilot

langchain

openai

LlamaIndex

Work experience

Technical Lead at Filament Finance, Apr 2025 - Present · 1 yr 7 mos, Singapore, Singapore, As Technical Lead, I led the architecture and development of DeFi and trading products spanning perpetual DEXs, prediction markets, liquidity systems, and on-chain infrastructure. I worked across protocol, smart contract, backend, and application layers, driving technical design and production delivery. • Led the development of Bento.fun on BNB Chain, building core systems for liquidity, settlement, rewards, tournaments, and real-time market operations, along with the Bento SDK ecosystem for third-party integrations. • Architected event-driven backend services and blockchain integrations, focusing on scalability, reliability, and low-latency market operations. • Led the development of Filament Pro, a hybrid perpetual DEX on Sei Network, covering smart contracts, liquidity, staking, vault and risk modules, and protocol integrations. • Developed Memex, a meme-coin perpetuals platform built on Orderly Network, integrating trading infrastructure and on-chain settlement. • Led smart contract security reviews and coordinated external audits with security firms, addressing vulnerabilities and strengthening protocol security before production deployments. • Contributed to Bento.fun's technical development and ecosystem initiatives, including Base Batches 001 and YZi Labs EASY Residency Season 2. • Worked across Solidity, TypeScript, Node.js, NestJS, Next.js, PostgreSQL, MongoDB, Redis, AWS, BNB Chain, Base, Sei, and Orderly Network.

Senior Solana Engineer at Ajna Capital, Apr 2024 - Jul 2025 · 1 yr 4 mos, Dubai, United Arab Emirates

Senior Blockchain Engineer at Filament Finance, Apr 2024 - Mar 2025 · 1 yr, Singapore, Singapore, Filament combines an orderbook with our novel COMB (Compartment-based) liquidity pool, which complements the orderbook resulting in deep liquidity at all price levels.

Research at Nethermind, Apr 2024 - Jul 2024 · 4 mos, England, United Kingdom, Worked on Stwo, a Circle STARK prover and verifier implemented in Rust, contributing to cryptographic proving infrastructure and performance optimization. • Implemented low-level Rust optimizations across performance-critical proving workflows. • Conducted benchmarking and comparative analysis of proving implementations to identify computational bottlenecks and optimization opportunities. • Worked with FFT/CFFT, FRI, M31 arithmetic, and GPU/CUDA-based optimization within the STARK proving pipeline. • Used Criterion benchmarking to measure performance improvements and evaluate optimization impact. Tech: Rust, C++, Cairo, STARKs, Zero-Knowledge Proofs, FFT/CFFT, FRI, M31, CUDA, Criterion

Senior Blockchain Engineer at Auro Digital Inc, Nov 2023 - Apr 2024 · 6 mos, Miami, Florida, United States, 1-stop-shop for managing digital assets. Built together with Broadridge, global leader in trading software platforms. Backed by one of the leading Silicon Vally VC's, Inventus Capital. B2B SaaS Order, Portfolio and Investment management (OMS/PMS/IMS): - Front, Middle and back-office trading platform - Buy and Sell side - Coins, Derivatives, Yield Farming, Staking NFTs, Tokenized physical assets. - Marketplace of digital asset managers - GUI and API access - Integrated into all the largest exchanges, OTC desk, market-makers - Leverages state of the art institutional architecture Website https://aurodigital.ai/

Blockchain Engineer at Hashstack, Dec 2022 - Nov 2023 · 1 yr, Bengaluru, Karnataka, India, Hashstack is a zk-native money market protocol enabling secure under-collateralised loans (lending and borrowing protocol). Worked on the architecture and development of smart contracts for Hashstack’s DeFi lending and borrowing protocol on Starknet, with a focus on protocol functionality, security, and development efficiency. • Migrated and optimized smart contract modules from Solidity to Cairo for Starknet deployment. • Led internal smart contract security reviews, identifying vulnerabilities and validating protocol implementations against SWC security standards. • Developed and maintained unit and end-to-end test suites to improve protocol reliability and deployment readiness. • Implemented TRD and improved development workflows, reducing feature development time by 20%. Tech: Solidity, Cairo, Rust, Go, Starknet, Hardhat, Protostar, Smart Contract Security, DeFi

Education

Master of Technology - MTech, Indian Institute of Technology, Bhubaneswar

Bachelor of Technology - BTech, National Institute of Technology Silchar

Public links

github: https://github.com/rajeebkm

rajeeb.vercel.app: https://rajeeb.vercel.app/