Device Centric Authentication
Personal project
Passwordless login with trusted devices as the primary identity factor, using a PKI-inspired challenge–response flow to resist phishing and credential replay.
keerthivibisan.com / timeline
Timeline.
Where I’ve worked, what I studied and what I’ve built, newest first.
- 3+ years at Grootan
- 7 projects built
- 14 commits on the graph
Tip: hover a tech chip to trace it through the timeline.
- Projects
- Groot of the QuarterGrootan Technologies · Recognised for outstanding performance and technical contribution, Q2 2024.
ExperienceBackend engineering, identity and access management and secure authentication, with ownership of Keycloak upgrades and custom security extensions.
- Own recurring Keycloak upgrades for IDP Core, adapting custom token exchange, partial import, Admin UI themes and authenticators to each release.
- Designed real-time MSSQL sync between Azure and on-premises with SymmetricDS, with conflict handling and queue-based recovery; zero data loss was the design goal.
- Wrote the low-level designs for the Super App's User Action Processor, XML parser and session/state management.
- Cut SparkZen Admin Portal delivery from 30 to 20 days with GPT-assisted development.
- Evaluated Matrix and Synapse for TI-Messenger with proofs of concept for federation, Olm/Megolm encryption and push notifications.
- Run sprint planning and delivery for the team, and mentor junior engineers on Keycloak and IAM.
- Experience
Joined through college placement and went straight into identity and access management with Keycloak.
- Extended Keycloak brute-force protection to OTP resend flows.
- Built IAM and user management for KOBIL Worksphere, with OIDC flows, IdP-initiated SSO and tenant-to-tenant token exchange.
- Implemented identity-provider features in the KOBIL KYC system.
- Helped migrate Keycloak from v19 to v21, debugging authentication flows, themes and configuration.
- Configured and demonstrated LDAP user federation and synchronisation for enterprise clients.
- Projects
Cryptography Chat
Personal project
Real-time chat where every message is encrypted and decrypted with AES-256-CBC, so only recipients with the right key can read it.
- Projects
– 2 mo
Expense Tracker
Personal project
Expense management built while learning full-stack Java, with a calendar view, budgets per amount, automatic statistics and reminders for money lent or borrowed.
- Projects
– 3 mo
Docs Online
College project, BIT
A Google Docs-style editor with real-time multi-user editing, sharing as editor or viewer, one-click locking, public links and publishing.
- Projects
– 3 mo
YouTube Clone
Personal project
The core of YouTube rebuilt to learn React and Node.js, including video upload, subscriptions, comments and likes.
- Projects
Admin Dashboard
College project, BIT
The admin side of the E-Learning Portal, for managing published courses, monitoring progress and blocking users.
- Experience
– 2 mo
Web Developer (Intern)
YaaRaa Technologies
Built the company's first official website, which stayed live for about two years.
- Projects
– 3 mo
E-Learning Portal
College project, BIT
My first project, a proof of concept that stops learners skipping to a certificate. Videos unlock one by one, fast-forwarding is blocked on first viewing, and tests can follow each video.
EducationBuilt my foundations in software development and cloud infrastructure through hands-on work in the Cloud Computing Lab, exploring full-stack development, AWS, Linux and web hosting.
Education
Education