Headline

Senior Backend & AI Engineer | LLM Agents, RAG, Python & FastAPI | Distributed Systems | Ultrahuman

About

I'm a Senior Software Engineer with 5+ years of experience building scalable backend systems, distributed applications, and AI-powered product infrastructure. Currently at Ultrahuman, I built a three-tier health-analysis pipeline with 38 domain-specific agents, parallel LLM orchestration, and hybrid RAG (pgvector + BM25 with Reciprocal Rank Fusion) across 50+ document types. I shipped real-time SSE streaming with Redis buffering and observability across 24 FastAPI endpoints, and led a MongoDB-to-MySQL migration for a high-I/O table processing 10M inserts and 2M updates a day. Previously at Scaler, I built large-scale ed-tech systems including a multi-tenant CRM from scratch, payment integrations, deployment pipelines, and a Kafka-fed MySQL-to-Elasticsearch data pipeline. I enjoy solving complex backend problems, improving system performance, reducing infrastructure cost, and building reliable products with strong business impact. Open to senior backend, AI engineering, and founding-engineer roles. Skills: Python, FastAPI, Ruby on Rails, Redis, MySQL, AWS, Kafka, Elasticsearch, LLM Applications, RAG, Distributed Systems, System Design.

Location

Bengaluru

AI stack

anthropic apis

claude code

codex

cursor

langchain

Portkey

Work experience

Senior Software Engineer at Ultrahuman, Mar 2025 - Present · 1 yr 8 mos, Bengaluru, •⁠ ⁠Built a three-tier LLM health-analysis pipeline with 38 domain-specific agents and parallel orchestration, plus hybrid RAG (pgvector + BM25 + Reciprocal Rank Fusion) spanning 50+ document types. •⁠ ⁠Shipped real-time SSE streaming with Redis buffering and tracing/observability across 24 FastAPI endpoints. •⁠ ⁠Reduced p99 latency by 10% using Redis connection pooling and request-scoped caching. •⁠ ⁠Led a MongoDB-to-MySQL migration for a high-I/O table handling 10M inserts and 2M updates daily. •⁠ ⁠Led three engineers to build an Ultrahuman Ring diagnostic dashboard in two weeks; monthly ring replacement fell from 30% to 20%.

Senior Software Engineer at Scaler, Jan 2025 - Mar 2025 · 3 mos, Bengaluru, • Developed a multi-tenant CRM from the ground up, focusing on API and database design. • Integrated PhonePe payments into a Ruby on Rails application, enhancing the payment flow. • Created a Kafka-fed MySQL-to-Elasticsearch pipeline, improving data processing efficiency. • Reduced staging deployment time from 45 minutes to just 2 minutes using Jenkins.

Software Engineer II at Scaler, Jan 2023 - Dec 2024 · 2 yrs

Software Engineer at Scaler, Jul 2021 - Jan 2023 · 1 yr 7 mos

Software Development Engineer at InterviewBit, Feb 2021 - Jun 2021 · 5 mos

Software Development Intern at Veris, Jul 2020 - Jan 2021 · 7 mos, Gurugram, Haryana, India

iOS Development Intern at AIRLINQ, Jun 2019 - Jul 2019 · 2 mos

Public links

github: https://github.com/hisaransh