CB Resume

Open to backend & platform roles

Chakravarthy
Batna

Backend Engineer · Java, Spring Boot, Security

I build authentication, security and platform services at WaveMaker, and I like tracking hard bugs down to their root cause.

Download resume View my GitHub
100+
production apps migrated
800+
reusable components moved
~95%
less manual migration work
~45%
faster authentication
  • Request
  • Async event
  • Bug, fixed in the service
  • Failed replica

A large-scale backend at work. Drag to turn it, hover a part to see what it does. Swipe sideways to turn it, tap a part to see what it does.

About

I'm an Associate Development Engineer on the backend team at WaveMaker, a low-code platform companies use to build enterprise web and mobile apps. Most of my work is in authentication and security: identity providers, tokens, sessions, and secure integrations with GitHub.

The part of the job I enjoy most is debugging. I'm comfortable opening a large codebase I've never seen and following a problem until I understand exactly why it happens. In my free time I fix bugs in large open-source Java projects.

I'm also doing an MCA in AI and Machine Learning, and I build side projects with RAG and MCP to learn how AI fits into backend systems.

Experience

  1. Oct 2024 – Present

    Associate Development Engineer (Backend)

    WaveMaker India

    Own backend services for authentication, token lifecycle and repository access on the WaveMaker platform. Built the projects below, with unit and integration tests, in Agile teams shipping to enterprise customers.

  2. Jul 2024 – Sep 2024

    Software Engineering Intern

    WaveMaker India

    Built UI components and a to-do app on the low-code platform while learning its development workflow.

What I've built

SaaS to Enterprise migration platform

  • JavaScript
  • REST APIs
  • Docker
  • SQLite
Problem
Customers moving from WaveMaker Online to WaveMaker Enterprise had to move every app by hand.
What I built
An automated pipeline that orders imports by dependency across multi-level component hierarchies, follows branches, provisions roles, and can resume safely after a failure.
Result
100+ production apps and 800+ components migrated with zero data loss, and about 95% less manual work.

GitHub Apps integration

  • OAuth 2.0
  • GitHub Apps
  • Java
Problem
The platform reached customer repositories with long-lived personal access tokens.
What I built
A GitHub Apps integration with OAuth authorization, installation lifecycle handling, and short-lived tokens generated on demand.
Result
No long-lived credentials, and least-privilege repository access for enterprise GitHub organizations.

Multi-provider authentication

  • OpenID Connect
  • SAML
  • JWS
  • Spring Security
Problem
Customers needed different identity providers inside the same application.
What I built
A pluggable backend for token validation, sessions and identity resolution that supports OpenID Connect, SAML, JWS, opaque tokens and database login.
Result
One security model across all providers, and new providers can be added without platform changes.

Sign-in for embedded apps

  • JWS
  • SSO
  • Cross-origin
Problem
Browsers block Microsoft SSO when a WaveMaker app runs inside another site's iframe.
What I built
A signed-token exchange between the host page and the embedded app, with origin checks and signature verification.
Result
Users are signed in silently inside embedded apps, with no redirects.

Redis session store

  • Redis
  • MySQL
  • Spring
Problem
Every request checked the session cookie with a synchronous MySQL lookup.
What I built
Moved sessions for all auth providers to a Redis store with time-based expiry.
Result
About 45% lower authentication latency, and easier horizontal scaling for multi-tenant load.

Skills for AI platform agents

  • AI agents
  • LLMs
  • Java
Problem
The platform's AI agents needed to manage version control and security tasks from plain-language requests.
What I built
Backend integrations and domain-specific skills for the agents, with better routing between them.
Result
About 30% fewer tokens used per task, and more relevant answers.

Open source

In my free time I contribute bug fixes to large open-source Java projects that many companies run in production. Maintainers review every change before it's merged.

How I work on a bug

  1. Reproduce it alone

    Strip the problem down to the smallest project that still fails.

  2. Find the root cause

    Read the source until the failure makes sense, not just the symptom.

  3. Make the smallest fix

    Change only what's needed and add tests that prove the bug is gone.

  4. Explain it clearly

    Write up the cause and the fix so reviewers can trust the change.

See my pull requests on GitHub

Skills

Languages
  • Java
  • Python
  • JavaScript
  • SQL
Frameworks
  • Spring Boot
  • Spring Security
  • Hibernate
  • JUnit 5
  • FastAPI
Auth and security
  • OAuth 2.0
  • OpenID Connect
  • SAML
  • JWT / JWS
  • Opaque tokens
  • Keycloak
  • SSO
Data and caching
  • PostgreSQL
  • MySQL
  • Redis
  • MongoDB
  • SQLite
AI
  • RAG
  • MCP
  • AI agents
  • LangChain
  • OpenAI API
  • Embeddings
  • pgvector
  • Sentence Transformers
  • Prompt engineering
APIs and DevOps
  • REST APIs
  • Microservices
  • Kong API Gateway
  • Docker
  • Maven
  • Gradle
  • Git
  • Linux
Concepts
  • System design
  • Distributed systems
  • Multithreading
  • Design patterns
  • SOLID
  • Data structures and algorithms

Education

  1. 2025 – 2027

    MCA in Artificial Intelligence and Machine Learning

    Amity University Online

  2. 2021 – 2024

    BSc in Computer Science

    Ambedkar University

Contact

I'm open to backend and platform engineering roles. The quickest way to reach me is LinkedIn.

Download resume (PDF)