BUILD IN PUBLIC 000 Sambhav Jain — Portfolio
Sambhav Jain

Ethereum Protocol Engineer · Open Source Contributor · Blockchain Analytics & Infrastructure

IIT Roorkee — India · 2026

S A M B H A V J A I N ↓ Scroll

RUST◦GO◦SOLIDITY◦YUL◦HUFF◦JSON-RPC◦KUBERNETES◦FOUNDRY◦THE GRAPH◦EVM ASSEMBLY◦TERRAFORM◦

01 — Summary

Builder focused on Ethereum infrastructure, distributed systems, and DeFi Analytics. Recently worked on Defillama dimension adapters, adding fees, revenue and volume metrics for 20+ protocols and chains. Before that, Worked on the Nethermind execution client, fixing parity issues, implementing JSON-RPC bugs and features, improving RPC testing frameworks, and building devops workflows. In Devops experience with Kubernetes, Argo CD, Prometheus, Grafana, and Terraform in production environments. Previously built routing and indexing systems for DeFi protocols at Anthias Labs and contributed to Protocol Labs ecosystem projects. Currently serving as President of BlocSoc IIT Roorkee, leading hackathons, events, and blockchain-focused initiatives.

02 — Experience

05 Roles

Nethermind

Ethereum Core Developer & DevOps Engineering Intern

March 2026 – June 2026

  • Fixed multiple bugs and client-parity issues in the Nethermind Ethereum execution client, improving compatibility across clients.
  • Implemented JSON-RPC features including block overrides, fork overrides, and streaming support and fixed bugs and compatibility issues in eth_* methods, also worked to correct them as per hive expects also fixed some bugs in engine/syncs/etc
  • Refactored Erigon’s black-box RPC testing framework for nethermind added a lot of test cases for eth_* rpc methods, changed tests to work with node type & refactored archive tests to work with full/pruned nodes, then built automated workflows for cross-client RPC testing and compatibility validation.
  • Operated production infrastructure with Argo CD, Kubernetes, Prometheus Operator, Grafana, Terraform, Sedge, and Helm charts across internal DevOps projects.

Anthias Labs

DeFi & AWS Engineering Intern

March 2025 – October 2025

  • Implemented Uniswap V2/V3, Kittenswap, and Hyperswap routing logic in Python, delivering optimized routes in under 2 seconds via custom indexers.
  • Built liquidity-source testing frameworks and indexers backed by pyrevm and DynamoDB state storage.
  • Interacted directly with CoreWriter contracts.
  • Maintained the complete AWS infrastructure, including deployment and maintenance of HyperEVM nodes, other backend and indexer instances, serverless functions, and DynamoDB.

Protocol Labs
Dev Guild

Fellow (Cohorts 4, 5, 6)

August 2025 – March 2026

  • Improved deployment scripts and smart-contract logic for FilOZ; fixed SDK and Lotus client issues.
  • Worked with Storacha on their rclone-compatible storage project.

BlocSoc
IIT Roorkee

President

June 2026 – Present

  • Built team-management logic and cross-chain functions using Axelar; wrote Huff fuzz tests for mathematical primitives.
  • Won multiple hackathon tracks including Based India; organized lectures and hackathons for university freshmen.

Samudai

2024

  • Delivered a short-term engagement building an ERC-20 token template in Solidity with role-based access and token functionality.

03 — Open Source Contributions

Hover to inspect

Defillama — Dimension Adapters

Added fees, revenue, and volume metrics for 20+ protocols and chains by tracking on-chain events, writing queries using Allium and Dune, and querying subgraphs with GraphQL.

Merged PRs ↗

Nethermind — Ethereum Client & Infrastructure

Merged contributions across the Nethermind ecosystem spanning client development, JSON-RPC, testing infrastructure, and DevOps tooling (Sedge, Kubernetes, Argo CD, Prometheus Operator, Grafana, Terraform).

Merged PRs ↗

FilOzone / Filecoin Ecosystem — Core Contributor

Shipped production PRs across filecoin-services, synapse-sdk, filecoin-cloud, filecoin-pay, and pdp.

Added PDP initialization counter tooling and validation logic for payer funds, operator approvals, rail rates, and metadata limits; improved Synapse SDK with caching, retry logic, and upload stability.

FilOzone ↗

Lotus, reth & Protocol Tooling

Added nonce-ordered message retrieval to Lotus RPC (lotus#13394); optional parallelization in reth (reth#14113).

EIP-7702 RPC test generation (rpctestgen#40); verified-contract event decoding in swiss-knife (swiss-knife).

OpenZeppelin Rust contracts testing/docs (PR 489, 497); JSON escaper for Solidity contracts (PR 5508).

Repos ↗

04 — Projects

04 Selected · Scroll →

/01 2024

ChillQuest

Interactive multiplayer game blending education and entertainment via cryptographic puzzles and zero-knowledge proofs; wrote chain-abstracted contracts and succinct-proof integrations in Rust.

Winner of Base, Socket, and Polygon tracks at EthIndia 2024; received a RareSkills grant for production readiness.

/02 2024

Athena

Winner of the Nethermind track at EthOnline 2024; implemented full backfilling with starknet.go and direct RPC calls, with implementation-history and ABI decoding faster than nethermind/entro.

/03 2024

Selene
Ethereum Light Client

Built config/checkpoint utilities for efficient checkpoint handling and implemented Merkle-proof verification and consensus update application.

/04 2023 – 2024

EVM From Scratch

Built a full Ethereum Virtual Machine implementation in Go (w1nt3r.eth course).

05 — Technical Skills

Languages

Rust · Go · Python · Solidity · JavaScript / TypeScript · Yul · Huff

Blockchain

Ethereum · Foundry · ethers.js · web3.js · The Graph · EVM Assembly

Infrastructure & DevOps

Kubernetes · Argo CD · Terraform · Prometheus · Grafana · Sedge · Docker · Nginx · AWS (IAM, Lambda, EC2, EBS) · DynamoDB · ALB

Testing & Web

Unit & Fuzz Testing · Formal Verification (Cyfrin) · MERN Stack · Next.js

06 — Achievements

  • Winner, Based India 2024; multiple track winner at EthIndia and EthOnline 2024; winner at ETHVietnam 2025; Open & UniDAO track winner at Stack Too Deep.
  • Received grants for Selene and ChillQuest; Ethernaut Level 25.

07 — Education

Indian Institute of Technology, Roorkee

B.Tech in Metallurgical and Materials Engineering

August 2023 – Present