Back End Developer

Proof of Skill

Proof of Skill

Software Engineering
Maharashtra, India
Posted on Sep 19, 2025

tl;dr - Looking for a backend developer with experience building and maintaining backend systems to join Proof-of-Skill. Should be skilled with Postgres/Express/Node, GitHub deployments, and curious to explore LLMs, blockchain, and new tech. In office role in Mumbai

Proof of Skill protocol is a blockchain-based system where industry experts (Validators) evaluate candidates' skills and issue verifiable Skill Credentials. Organizations can then shortlist candidates based on these credentials.

Qualifications and Skills:

3+ years of experience in back-end development, with a strong focus on blockchain technology
Proven track record of building and scaling decentralized applications (dApps) or blockchain-based products
In-depth understanding of blockchain architectures, consensus mechanisms, and smart contract development
Proficiency in programming languages such as Solidity, Rust, Go, or other relevant languages for blockchain development
Familiarity with various blockchain platforms (e.g., Ethereum, Polkadot, Cosmos, Solana) and their respective ecosystems
Experience with decentralized storage solutions (e.g., IPFS, Filecoin) and decentralized identity protocols
Strong knowledge of cryptocurrency wallets, token standards (ERC-20, ERC-721), and blockchain security best practices
Familiarity with decentralized finance (DeFi) concepts is a plus

Responsibilities:

Design and develop the core back-end components of the Proof of Skill protocol, including smart contracts, blockchain integration, and off-chain services
Implement secure and efficient data storage and retrieval mechanisms for skill credentials and validator information
Develop and integrate decentralized identity solutions for validators and candidates
Ensure the scalability, performance, and security of the protocol as it grows
Collaborate with cross-functional teams, including front-end developers, UX designers, and product managers
Stay up-to-date with the latest blockchain technology trends and advancements
Contribute to the project's technical documentation and knowledge-sharing initiatives

Ideal Candidate Traits:

Strong problem-solving and critical thinking skills
Ability to work independently and as part of a team
Excellent communication and collaboration skills
Passion for decentralized technologies and their potential impact
Entrepreneurial mindset and willingness to take ownership
High agency and a drive for continuous learning and improvement

If you have a deep understanding of blockchain technology and a passion for building innovative, decentralized solutions, we invite you to join our team and contribute to the future of skill verification and credentialing.