Vol. 01 AI & Full-Stack Engineer

Arjun

Aggarwal

I build reinforcement-learning environments that train and evaluate LLM agents — and ship full-stack products end to end.

NowFounding Member of Technical Staff (Intern)@ Evaratus · Nov 2025 — Present
30+
Multi-agent RL environments
1 TB+
Structured data behind the tool-use API
5
Enterprise data sources
Loading model…
Now buildingEvaratusRL environments for LLM agents

Chapter 01

Experience

What I build, how it’s architected, and how I work with a team.

Current Work · Nov 2025 — Present

Evaratus

Founding Member of Technical Staff (Intern)

Building the reinforcement-learning environments, tool-use infrastructure and graders used to train and evaluate LLM-based AI agents.

30+
Multi-agent RL environments
1 TB+
Structured data behind the tool-use API
5
Enterprise data sources
Teams
Led through planning, design & reviews

A What I built

  1. Built 30+ multi-agent reinforcement-learning environments in Python, including multi-app environments where agents complete workflows spanning several enterprise tools — used to train and evaluate LLM-based AI agents.
  2. Engineered a tool-use API over 1 TB+ of structured data from 5 enterprise sources, letting agents query state and execute long-horizon actions inside reproducible Docker containers.
  3. Designed task suites, reward functions and automated verifiers, pairing LLM-as-judge grading with programmatic checks to score agent trajectories against a standardized benchmark.
  4. Led multiple engineering teams through task planning, technical design and code reviews, mentoring teammates on simulation and grading design.
  • Python
  • Docker
  • LLM-as-judge
  • Reinforcement learning
  • Multi-agent orchestration
  • Data pipelines

B Architecture

Agent training & evaluation platformHow data, environments and graders fit together. Select a component to see what I built there.
actionsepisodestool callsreward signal5 enterprise sourcesstructured dataStructured data1 TB+Tool-use APIquery state · actDocker sandboxesreproducibleTask suitesmulti-app workflows30+ RL environmentsPythonLLM agentunder training / evalTrajectoriesactions + outcomesVerifiersLLM-as-judge + programmaticRewards & benchmarkstandardized score
source5 enterprise sources

Structured data from five enterprise tools — the raw state agents will work against.

C Leadership & behaviour STAR

  1. Leading engineers through the build
    Situation
    Building 30+ environments meant several engineers working in parallel on simulations, tasks and graders.
    Task
    Keep the work planned, the designs coherent and the quality consistent across teams.
    Action
    Led task planning and technical design, ran code reviews, and mentored teammates on simulation and grading design.
    Result
    Multiple teams shipped environments against a shared design and grading approach.
  2. Grading agents you can trust
    Situation
    Agent trajectories are long and open-ended — hard to score with rules alone.
    Task
    Make evaluation both nuanced and reliable.
    Action
    Designed task suites, reward functions and verifiers that pair LLM-as-judge grading with programmatic checks.
    Result
    Agent trajectories scored against a standardized benchmark.

Education & side quests

Chapter 02

Projects

Things I’ve built outside work — each with its architecture.

Chapter 03

Skills

The stack I fight with, and the side quests along the way.

Power levels

  • PythonRL environments, data pipelines, Pandas, NumPy92
  • Generative AILLM integration, RAG, multi-agent orchestration, agentic workflows90
  • JavaScript / ReactReact.js, Node.js, Express.js, Tailwind CSS, REST APIs86
  • C++ / DSACompetitive programming — CodeChef 3★, Codeforces Pupil85
  • ML & NLPScikit-learn, NLTK, data analysis82
  • DatabasesMongoDB, MySQL, vector databases78
  • DevOpsDocker, Kubernetes, CI/CD, GitHub Actions, Datadog, Mixpanel76

Achievements

  • CodeChef 3★Peak rating 1615
  • Codeforces PupilCompetitive programming
  • BuildVerse HackathonScaler × HackWithIndia, May 2025
  • ClubsAI/ML Club · NlogN CP Club

Languages

  • C++
  • Java
  • JavaScript
  • Python
  • SQL
  • HTML/CSS

AI tools & platforms

  • Claude
  • ChatGPT
  • Claude Code
  • Git
  • GitHub
  • Google Colab

Chapter 04

Contact

Hiring for AI or full-stack work, or want to collaborate? My inbox is open.