konan

Backend & Infrastructure Engineer Oct 2024 - Jun 2025 San-Francisco, US • Scaled fintech infrastructure handling 5M+ monthly payment transactions, cutting latency by 60% and driving $5M/year in additional transaction volume. • Designed microservices in Node.js, Go, and Python, enabling modular, fault-tolerant infrastructure and improving system resilience by 50%, reducing incident recovery time by 35%. • Built a recursive web scraper automating data extraction across 10K+ sources, increasing data accuracy by 35% and saving 120+ engineering hours/month • Optimized RAG pipelines through smarter indexing and caching, improving AI retrieval efficiency by 40% and cutting API costs by $2K/mo. • Managed GCP infrastructure and automated deployments via CI/CD, reducing release downtime by 80% and enabling daily feature rollouts. • Conducted technical interviews and onboarded 6 junior developers, which reduced ramp-up time by 40% and increased team productivity by 25%

Developed cross-chain execution modules for an HFT arbitrage system in Rust and Go, improving order routing performance by 30% and enabling the system to process $3.2M in monthly trading volume across Solana and Ethereum. • Directed development of an AI agent for smart contract auditing, detecting 900+ vulnerabilities across EVM chains and reducing audit turnaround time by 65% through automated static and dynamic analysis • Engineered a Community Management Agent with RAG pipelines integrated into Telegram and Discord, boosting engagement by 40% and improving token retention among active holders. • Deployed Kubernetes- and Docker-based container infrastructure, achieving zero-downtime rollouts and scaling services to 1,200+ containers under peak trading volume. • Architected a high-availability backend in NestJS and Go microservices, sustaining 99.9% uptime and processing 20 M+ requests/day from trading and agent systems. • Designed a Next.js analytics dashboard for real-time trading metrics and contract health, increasing trader retention by 18% and improving visibility into on-chain performance.

• Ranked in the top 1% out of 20,000+ participants, recognized for technical excellence and leadership in AI and backend systems. • Led a 60-member engineering cohort to deliver an MVP, AI for Homework, an intelligent tutoring assistant that automated assignment support for 10K+ students during beta testing. • Optimized task-specific LLM personas via OpenRouter, boosting model efficiency by 35% through fine-tuned prompts, caching, and response ranking. • Architected a multi-tenant backend for a reusable SaaS boilerplate using NestJS and PostgreSQL . • Implemented RAG-based pipelines for context-aware data retrieval, accelerating information access by 35% and improving response relevance by 28% across multiple use cases.

• Architected gas-optimized smart contract infrastructure that reduced transaction costs by 35% and enabled approx. $0.01 microtrans- actions across EVM and Layer-2 chains. • Scaled marketing and loyalty systems for Crypto/NFT projects, implementing automated token airdrops and analytics pipelines that grew active user engagement band generated token-driven campaign revenue. • Deployed ERC-20 and ERC-721 smart contracts with on-chain reward logic and referral incentives, powering 50K+ active wallets and increasing daily transaction volume by 2.4× • Built RESTful APIs with Express.js and Mon