Backend Lead Developer (Web3)

TL;DR

Backend Lead Developer (Web3): Leading the technical backend efforts for a blockchain and AI-powered data aggregation platform with an accent on driving innovation, scalability, and data quality. Focus on designing robust scraping systems, optimizing databases, integrating AI agents, and mentoring developers.

Location: Remote (Belgrade, Warsaw, Tel Aviv, Barcelona)

Company

hirify.global is a pioneering Web3 and blockchain development company building innovative solutions like Hord, ChainPort, and TokensFarm.

What you will do

• Lead backend development, architecture, and technical roadmap for the platform.
• Research and experiment with new AI models and scraping methods for data improvement.
• Design and maintain robust web scraping and data pipelines using Python.
• Optimize and manage PostgreSQL and MongoDB databases, including vector search.
• Integrate LLMs (ChatGPT, Perplexity) and CrewAI to scale AI-driven features.
• Manage AWS services and automation, and oversee 3rd-party API integrations.

Requirements

• 5+ years of backend development experience, with at least 2 years in a lead/architect role.
• Strong Python skills (FastAPI, Flask, Django or similar).
• Proven experience with web scraping at scale.
• Solid understanding of PostgreSQL (schemas, migrations, performance tuning) and MongoDB (vector DB, embeddings).
• Hands-on AWS experience (EC2, S3, CloudWatch, API Gateway, Lambda, SageMaker).
• Knowledge of blockchain/Web3 ecosystems, with the ability to read/write Solidity contracts (entry-level).

Nice to have

• Experience with CrewAI or other agent frameworks.
• Knowledge of data enrichment and NLP pipelines.
• Exposure to business intelligence tools and analytics.

Culture & Benefits

• Opportunity to lead a cutting-edge Web3/AI product.
• Work with modern stacks (AI, blockchain, web scraping, embeddings).
• Flexible remote-first work environment.
• Growth potential in leadership and architecture.
• Competitive compensation package.