Backend Systems · API Platforms · AI Products

Ambar Kashyap

Engineering Leader

Solution Architect

Forward Deployed Engineer

Building scalable systems at BT Group, shipping AI products on the side, and writing about what actually works.

Bengaluru|@buildersensei

14+

Years

11

Projects Built

14+ Years · 5 Companies · 10+ Awards · 4 Domains · Millions of Users · API-First Builder · 14+ Years · 5 Companies · 10+ Awards · 4 Domains · Millions of Users · API-First Builder ·
01 / About

Who I am

Ambar Kashyap

Seasoned Engineering Leader with 14+ years building high-impact backend systems and leading cross-functional teams across telecom, SaaS, EdTech, and healthcare.

I build API-first platforms and design scalable microservices architectures. Hands-on with Java and Spring Boot, with deep focus on cloud-native delivery and product-aligned engineering.

Currently leading API orchestration for the EE app at BT Group, serving millions of users with real-time event processing and personalized recommendations.

API Engineering Lead @ BT Group

Danton — ask this site anything

An AI assistant I built to answer questions about my work. It answers only from my actual career history — and says so when it doesn’t know.

Ask Danton
02 / Experience

Where I've been

03 / Projects

What I've built

Things I build to stay sharp — mostly applied AI, distributed systems, and developer tooling. Every one of these started as a question I wanted answered.

01

EE App API Orchestration

Personalized Recommendations Platform

Orchestration layer fronting the EE app's recommendation surfaces. Splits read and write paths across Kafka-backed event streams so personalization can be recomputed asynchronously without blocking the request path, with Redis fronting the hot recommendation set.

Reduced p99 latency by 25% on critical APIs and sustained 99.9% availability through Dynatrace and ELK-based observability.

JavaSpring BootKafkaRedisAWSBT Group · 2024 — Present
02

iFlight Neo — Crew Roster Platform

Rostering for Global Airline Crew Management

Architectural lead for the Roster Calendar and Roster History components. Defined service boundaries and an audit-trail architecture that tracks every change across flight pairings and crew duties, so roster state stays reconstructable at any point in time.

Modularized airline-specific configuration into separable services and led performance tuning across the rostering path.

JavaSpring BootPostgreSQLActiveMQ ArtemisData Template (IBS Software) · 2023 — 2024
03

LMS Platform

Four-App Learning and Proctoring System

Owned architecture and stack selection for a learning platform built under aggressive MVP timelines, modelling the domain across four applications — CRM, Educator Portal, Learner App and a proctored exam platform — around a shared identity and assessment core.

Integrated AWS Rekognition for identity verification and live exam auto-proctoring.

JavaSpring BootAWS LambdaFirebaseAWS RekognitionParakh Online · 2021 — 2022
04

Oracle Hyperion FDMEE Integrations

Enterprise Financial Data Pipelines

Direct Load APIs and ingestion pipelines for enterprise financial data management, with concurrency controls around batch load windows to keep ingestion reliable under contention.

JavaOracle DBREST APIsConcurrencyOracle · 2018 — 2020
05

Medicaid Enterprise System

Worker Portal & FAST4J ORM

Built the Worker Portal module processing eligibility determinations for state Medicaid systems, and grew into the subject-matter expert for FAST4J, Deloitte's proprietary ORM framework, supporting teams across the practice on its data-access patterns.

JavaJ2EEFAST4JPostgreSQLWebSphereDeloitte · 2012 — 2017
08

Playhood

Sports OS for Gated Communities

PWA exploring invite-link distribution as an alternative to app-store installs — no download, state resumes from the link. Ball-by-ball scoring pushes over a real-time channel to every spectator, and AI banter generation runs a primary model with an automatic fallback so commentary degrades gracefully rather than failing.

Covers tournament management and an honours board on the same real-time store. Built at VibeCon 2026.

PWAReal-timeAIPersonal project ·
11

Flow Explainer Studio

Sequence Diagrams as Interactive Walkthroughs

Single-file browser tool that parses Mermaid, PlantUML and draw.io sequence diagrams into an intermediate step model, then replays them as animated step-by-step walkthroughs. Zero build step and no runtime dependencies — the whole tool is one HTML file so it can be shared into any review or demo.

Built to make API architecture reviews legible without walking an audience through a static diagram.

TypeScriptMermaidPlantUMLSVGPersonal project ·

Also building

  • KMCare — OPD management for clinics — registration, appointments, EMR and prescriptions, modelled as an explicit domain aggregate.
  • KMCricket — Cross-platform cricket scoring with real-time match events and player stats over a WebSocket channel.
04 / Skills

What I work with

Architecture & Design

Scalable SystemsDomain ModelingSolution ArchitectureEvent-Driven DesignAPI Governance

Backend

Java 17 / 21Spring BootREST APIsMicroservicesJava Concurrency

Cloud & DevOps

AWS (EKS, Lambda, Beanstalk)FirebaseCI/CDGitLabDockerDynatraceELK

Frontend

ReactNext.jsNode.jsTypeScriptTailwind CSS

Tools & Data

KafkaPostgreSQLRedisOracle DBBlazeMeterJIRA
05 / Recognition

Awards & credentials

Recognition

Top 10 — 100xEngineers Cohort 5 Demo Day100xEngineers, 2025
10+ performance awards (Star, Applause, Spot)Deloitte, 2013 — 2017

Certifications

Oracle Certified Java ProgrammerOracle
HL7 2.7 Control SpecialistHL7 International
100xEngineers AI Cohort 5 — Alumnus100xEngineers

Education

B.E. Telecommunications Engineering

PES University · 2008 — 2012

Let's build something
together.

Open to Engineering Manager and Technical Leadership roles. Always happy to talk architecture.

Ask Danton about me