Arnab Pal

About

Engineering team lead with ~7 years building LLM-agent systems and the backend platforms behind them — LangGraph orchestration over WebSockets, async data pipelines, and high-throughput products on Django, Postgres, and AWS. I own problems from design through production and mentor the team. At Inferstrat I lead the team building real-time LLM-agent orchestration for social-listening and ads-optimization products, social/sentiment analytics platforms (Django, PostgreSQL, Airflow), and an ads-management suite with AI-generated, brand-grounded ad copy. Before that, at Pixis, I designed async job systems on AWS ECS/Fargate, managed 10M+ row Postgres workloads at millisecond latency, and drove CI/CD and cloud-cost improvements. Outside work I build open-source tooling for AI agents, like Retrace — a flight recorder with deterministic record/replay and causal diffing for LLM agents.

Experience

• Team Lead
  Inferstrat
  Sep 2023 – Present

  • Built real-time LLM-agent orchestration with LangGraph over WebSockets, with custom tools, powering social-listening and ads-optimization products. • Developed backend platforms for social listening, sentiment analysis, and hyperlocal analytics (Django, PostgreSQL, Airflow), including a Facebook/Instagram/TikTok aggregator via OAuth2 + Graph APIs with custom-trained sentiment classifiers. • Shipped an ads-management suite with AI-generated ad copy grounded in brand voice and audience intent, wired to ad-account performance data for predictive recommendations.

• Senior Software Engineer
  Pixis
  Sep 2020 – Sep 2023

  • Designed an asynchronous job system for scalable ingestion of long-running jobs with robust fault handling; scaled Celery consumers on AWS ECS/Fargate. • Managed insert/update of 10M+ rows in RDS Postgres at millisecond latency. • Led DevOps improvements from CI/CD (GitHub Actions) to cloud-cost optimization, and mentored junior developers.

• Backend Developer
  Absentia Virtual Reality
  Mar 2019 – Aug 2020

  • Built a report-generation platform end-to-end (backend and frontend) from scratch for internal operations, cutting manual load and enabling new-client acquisition.

Education

• 2013 JU
  Bachelor of Engineering

  Jadavpur University

  2009 – 2013

  2009 – 2013

Skills

Tools / apps / platforms

Languages

Projects

• Retrace — a flight recorder for AI agents (open source) ↗
  Python, OpenTelemetry, pytest

  Deterministic record/replay + causal diff for LLM agents: tamper-evident hash-linked trace, network-sealed replay, and a diff that pins the root cause of a non-deterministic failure. OpenTelemetry bridge, pytest CI harness, open spec.

• Autonomous job-search agent
  LangGraph, FastAPI, SQLAlchemy, Alembic

  LangGraph observe → decide → act → learn loop with adaptive fit-scoring, human-in-the-loop approval, tailored-resume generation, and Gmail triage.