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Cosmos Sdk Developer Jobs (NOW HIRING)

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Protocol Engineer

Iselin, NJ · On-site +1

$70 - $80/hr

Deep experience with Cosmos SDK and CometBFT. Comfort building custom modules and modifying ... Engineer custom ABCI++ extensions (specifically PrepareProposal and Vote Extensions) to implement ...

Cosmos Labs

General application

New York, NY · On-site +1

The Cosmos SDK and IBC protocol are the foundation for chains managing tens of billions in value ... Play a critical role in building our culture, our engineering practices, the products we ship, and ...

Launch Legends

Developer Relations Lead

Cheyenne, WY · On-site +1

$55 - $72/hr

... chains, Cosmos SDK, or IBC; ability to write and debug Solidity or Rust Ability to write high-quality technical documentation and developer education content Experience organizing hackathons ...

Launch Legends

Developer Relations Lead

Cheyenne, WY

$56 - $73.25/hr

... chains, Cosmos SDK, or IBC; ability to write and debug Solidity or Rust Ability to write high-quality technical documentation and developer education content Experience organizing hackathons ...

ZetaChain

Senior Platform Engineer

San Francisco, CA

$190K - $225K/yr

Familiarity with Cosmos-based chains or EVM clients * Experience with DevOps, DevSecOps, or GitOps ... Cosmos SDK, Tendermint / CometBFT, Ethereum, Bitcoin Why Join Us * Build and operate infrastructure ...

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Cosmos Sdk Developer information

What are the key skills and qualifications needed to thrive as a Cosmos SDK Developer, and why are they important?

To thrive as a Cosmos SDK Developer, you need strong proficiency in Go programming, blockchain architecture, and experience with the Cosmos SDK framework, often supported by a degree in computer science or related fields. Familiarity with tools like Tendermint Core, REST APIs, and version control systems such as Git is essential, and certifications in blockchain technologies can be beneficial. Problem-solving skills, attention to detail, and effective communication enable collaboration and the ability to address complex technical challenges. These skills ensure secure, scalable, and efficient development of decentralized applications on the Cosmos network.

What are some typical challenges Cosmos SDK Developers face when integrating custom modules into a blockchain application?

Cosmos SDK Developers often encounter challenges such as ensuring module compatibility with existing components, maintaining security while extending chain functionality, and handling inter-module communication. Debugging and testing new modules can be complex, especially when managing state changes and message passing. Effective collaboration with other developers and clear documentation are crucial to successfully integrating custom modules without introducing vulnerabilities or performance issues.

What is a Cosmos SDK Developer?

A Cosmos SDK Developer is a software engineer who specializes in building blockchain applications using the Cosmos SDK, a framework that allows developers to create custom, interoperable blockchains. These developers work on creating decentralized applications (dApps), modules, and blockchain networks that can easily connect and communicate with other blockchains in the Cosmos ecosystem. They often use programming languages like Go and are familiar with blockchain concepts such as consensus algorithms, governance, and token economics. Their role is crucial in expanding the Cosmos network and ensuring secure, scalable, and efficient blockchain solutions.
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Cosmos Sdk Developer jobs near you
Infographic showing various Cosmos Sdk Developer job openings in the United States as of June 2026, with employment types broken down into 29% Full Time, and 71% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution.

Hiring: Lead Protocol Engineer at Iselin, NJ

Realtech Services

Iselin, NJ • On-site

$104K - $137K/yr

Contractor

Posted 6 days ago

Job description


Job Title :  Lead Protocol Engineer

Location : Iselin, NJ (3 days hybrid work)

Duration: 12+ Months Assignment

Job Description:

Responsibilities

Core Protocol Development: Architect and build a custom blockchain application using Go, Cosmos SDK, and CometBFT (Tendermint)

Cryptographic Implementation: Implement and optimize privacy-preserving primitives, specifically Pedersen Commitments and Bulletproofs (Range Proofs), ensuring no trusted setup is required

Consensus Customization: Engineer custom ABCI++ extensions (specifically PrepareProposal and Vote Extensions) to implement an on-chain Multi-Party Computation (MPC) mixing network

State Machine Design: Design a custom KVStore state machine that manages homomorphic encrypted balances (Elliptic Curve points) instead of plaintext integers

Performance Engineering: Optimize cryptographic operations (scalar multiplication, point addition) for low latency and high throughput in a distributed environment

Auditing Infrastructure: Build secure off-chain query layers and "view key" mechanisms that allow for granular, permissioned regulatory auditing

Required Qualifications:

5+ years of Specialty Software Engineering experience, or equivalent demonstrated through one or a combination of the following: work experience, training, military experience, education

3+ years of experience in backend or systems programming, with expert-level proficiency in Go (Golang)

6+ months of experience with Elliptic Curve Cryptography (ECC)

1+ year of experience with BFT consensus algorithms, P2P networking, and state replication; reliable, distributed systems experience

Desired Qualifications:

Blockchain Core: Deep experience with Cosmos SDK and CometBFT. Comfort building custom modules and modifying consensus logic, not just deploying smart contracts

Pedersen Commitments (Homomorphic encryption properties)

Zero-Knowledge Proofs (specifically Bulletproofs or Sigma protocols)

Math-to-Code: Demonstrated ability to read academic whitepapers/preprints and translate mathematical specifications into functioning code

Experience with MPC (Multi-Party Computation) or Verifiable Secret Sharing (VSS) schemes

Familiarity with the Ristretto255 curve or libraries like gnark-crypto

Background in FinTech, payment systems, or high-frequency trading platforms

Understanding of the Account Model vs. UTXO Model trade-offs in privacy-preserving ledgers