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Staff mobile, SDK and agentic AI engineer

I build reliable
mobile systems
and trusted AI.

I’m Madhur Lalit, a Staff Android engineer and SDK architect who builds complete product systems, from mobile runtimes and real-time backends to AI agents with evidence, permissions and explicit human oversight.

Explore selected work Download résumé GitHub LinkedIn
Since 2013shipping Android and mobile products
5,000+publisher SDK integrations reached
55→78%test coverage through a production SDK refactor
50%faster customer issue resolution after refactoring
01 / Selected work

Proof, not pitch.

Public, inspectable work spanning mobile SDKs, backend systems, AI-native products, agent operations and developer experience.

Open-source reference platform · Full-stack ad tech2026

Apex Platform

One independently built ecosystem—from the SDK edge to the learning loop.

A working advertising stack connecting Android delivery, real-time auctions, demand and publisher operations, bounded AI agents and evidence-gated machine learning.

  • Java Android SDK
  • Go auction server
  • Next.js demand + publisher portals
  • Python intelligence layer
Explore the public Android SDK Read the SDK documentation Open the live Apex Platform
The complete system loop

Intent → evidence → approval → auction → a better next decision.

Select any stage to follow the system. The animated orbit shows the continuous flow of product evidence, policy decisions, bids, outcomes and intelligence.

Stage 01Apex SDK
01 · On-device edge

The request starts inside the app.

A zero-runtime-dependency Java SDK collects privacy-safe context, builds OpenRTB requests, renders every major ad format, measures viewability and executes native actions. Its demo app is built in Kotlin with Jetpack Compose.

  • Java SDK
  • Kotlin demo
  • Jetpack Compose
  • OpenRTB 2.6
Conversational sponsored suggestion rendered by Apex SDK
Intent-to-action native ad with a Google Wallet offer
Applied Agentic AI / Apex Platform

One evidence plane.
Bounded agents.

I built creative, campaign and publisher agents that share governed evidence without sharing unchecked authority.

The Creative Generator and Review Agent turn landing-page truth into format-ready, policy-scored ads. Campaign and Publisher Copilots explain operational changes, propose bounded actions and ask for approval before mutations. MCP exposes versioned evidence and tools, while admin-only decisions remain outside advertiser authority.

  • 4 specialised agents
  • 0 LLM calls in the serving path
  • Human-approved mutations
Open the live platform Read the public case study
Agent operationsEvidence + permission bounded
  1. 01
    Evidence resolvedLanding page · brand · assets · policy version
  2. 02
    Creative generatedDisplay · Native · Interstitial · VAST
  3. 03
    Review agentDeterministic gates · scored judgment · reasons
  4. 04
    Copilot proposalCampaign or publisher action with scope and impact
  5. 05
    Human approval + auditOnly permitted actions execute; every step is recorded
01Tool bounded

MCP exposes named evidence and actions, not ambient system access.

02Human approved

Campaign mutations show reasoning, scope and impact before execution.

03Role separated

Advertiser agents cannot override admin review or publisher authority.

04Off the hot path

No LLM call can add latency to an impression auction.

BehördenBuddy home screen with German bureaucracy topics
BehördenBuddy AI assistant screen
Independent product · Live beta2026–present

BehördenBuddy

Making German bureaucracy feel less like a maze.

An AI-native Android product that turns complex public processes into plain-language guidance, checklists and conversations—with a FastAPI gateway, streaming responses, Play Billing and layered abuse protection.

  • Jetpack Compose
  • Claude API
  • FastAPI
  • Room
  • Play Billing
Additional product experiments

Focused builds that test architecture, security, performance and product ideas beyond the primary Apex and mobile case studies.

Open-source backend · Production-shaped03

Apex Sentinel

An explainable multi-tenant Ktor control plane for versioned traffic policy, idempotent audit replay, incident briefs and live operational streams, kept outside the Go auction hot path.

Kotlin · Ktor · PostgreSQL · SSE
View repository
Android computer vision · Measured POC04

Guided Capture

A CameraX quality gate that measures blur and lighting on every frame, guides the user before capture and keeps pure image analysis isolated in a reusable JVM module.

CameraX · Compose · Classical CV
View repository
Independent product · Beta05

Anchora

A practical Android co-pilot for skilled immigrants navigating job loss, residence timelines and relocation in Germany.

Compose · Hilt · Room · FastAPI
Independent product · Prototype06

GreenStride

A rewards product for walking, cycling and transit, backed by a GDPR-conscious service and automated Play Store delivery.

Android · FastAPI · CI/CD
Independent security lab · MVP07

AegisMac

A privacy-first Swift antivirus MVP with local scanning, reversible quarantine and signed rule updates for Apple silicon.

Swift · SwiftUI · Ed25519
02 / How I work

Depth where it matters.

I move comfortably between product detail and platform constraints—and make the trade-offs visible to the whole team.

01

Mobile architecture

Java and Kotlin, Jetpack Compose, background work, offline-first data and the architectural judgment to keep a growing product testable and easy to change.

02

SDK & platform design

Stable public APIs, modular systems, release engineering, observability and performance across thousands of host applications.

03

Agentic AI systems

Bounded reasoning loops, MCP tool contracts, structured decisions, evals, replay, explicit human approval and deterministic fallbacks with cost and latency controls.

04

Technical leadership

Roadmaps, ADRs, design reviews, mentoring and cross-team alignment spanning Android, iOS, backend, product and research.

KotlinJetpack ComposeCoroutines & FlowClean ArchitecturePython / FastAPIGoOpenRTBAgentic workflowsMCP tool contractsLLM gatewaysEvals & replayHuman approvalCI/CD
03 / Experience

A career in shipped systems.

Building Android products since 2013 across consumer apps, developer platforms and staff-level technical leadership in India and Germany.

Smaato / Verve platform contributions

Platform engineering across three production SDKs.

Architecture, performance and privacy work spanning the Smaato Next-Gen SDK, PubNative HyBid and ATOM—delivered within production constraints and stable publisher contracts.

01Technical owner · Architecture modernisation

Smaato Next-Gen SDK

Led a production Java SDK refactor toward MVVM while preserving public integration contracts. Introduced an in-house dependency injection framework, DSN-based crash reporting through UncaughtExceptionHandler, and clearer test and debugging boundaries.

  • 55% → 78% test coverage
  • 50% faster issue resolution
  • No third-party DI runtime
02Cross-team Android SDK unification

PubNative HyBid SDK

Contributed to platform convergence across PubNative HyBid and the wider Smaato stack—aligning architecture, public API expectations, ad-format delivery, testing and release coordination across Android, iOS and backend teams.

  • 3-team SDK unification
  • Cross-team architecture
  • Production integrations
03Privacy-first on-device ML

ATOM SDK

Built and evolved core Android capabilities for behavioural signal processing on device, keeping data local and the runtime dependency-free while aligning integration with iOS and ad products.

  • On-device ML
  • Local signal processing
  • Zero runtime dependencies
Products shipped with previous teams

Named contributions to consumer products that reached the Play Store—showing where I built from zero and where I contributed as part of a delivery team.

01Wishpoint Tech
Key Android contributor

Scandid

Played a key role in Android delivery for the shopping assistant used at million-download scale. Shipped barcode scanning, price comparison, deals and cashback journeys while modernising the product toward Kotlin and a more maintainable architecture.

  • Product scale · 1M+ installs
  • Product scale · 200+ retailers
  • My impact · 60% fewer crashes
View Scandid on Google Play
02TravelX.ai / Wishpoint product group
Sole Android engineer · Zero to one

TravelX

Built the Android product from the ground up—owning architecture, UI, API integrations, offline-tolerant behaviour, testing and Play release. Connected flight data, duty-free discovery, location and airport services in one traveller experience.

  • Greenfield build
  • Flight + retail APIs
  • Play Store launch
View TravelX on Google Play
03Codewalla
Android health-product contribution

Stroke Awareness

Contributed to Android delivery for a safety-critical public-health app that helps people recognise stroke signs, call 911, alert emergency contacts and locate the nearest certified stroke centre.

  • Stroke-sign guidance
  • Emergency alerts
  • Certified centres
View Stroke Awareness on Google Play
2021–present
Smaato · Verve Group

Staff Android Engineer · Former Engineering Manager

Technical owner across the Smaato Next-Gen SDK, contributor to PubNative HyBid unification, and Android lead for privacy-first ATOM capabilities, setting architecture and release direction for SDKs running across millions of devices.

  • Refactored the Java SDK toward MVVM and raised test coverage from 55% to 78%
  • Reduced customer issue resolution time by 50% through better diagnostics and architecture
  • Contributed to PubNative HyBid SDK unification across Android, iOS and backend teams
2017–2020
Scandid + TravelX · Wishpoint product group

Senior Android Engineer

Made key contributions to Scandid Android at million-download scale and built TravelX Android from the ground up as its sole Android engineer—across architecture, product UI, integrations and release.

  • Reduced Scandid production crashes by 60%
  • Built TravelX from greenfield to Play Store
  • Designed for low-end devices and unreliable networks
2015–2017
OAB Studios

Android Developer

Built and launched native Android products for international clients across EdTech, HealthTech and enterprise domains, integrating APIs, Firebase and third-party SDKs within maintainable mobile architectures.

  • Shipped Android apps for international clients
  • Built across MVVM and MVP architectures
  • Delivered API and Firebase integrations
2013–2015
Codewalla

Android Developer

Delivered consumer-facing Android applications in Java—including the Stroke Awareness Foundation’s public-health app—and grew proof-of-concepts into production-ready products.

  • Contributed to the Stroke Awareness Foundation app
  • End-to-end product delivery
  • Local persistence and API integration
04 / Writing

I write down the hard parts.

Notes from real architecture work—constraints, trade-offs and the lessons that survive beyond one codebase.

01Why I Built an Android Ad SDK with Zero Third-Party Dependencies5 min · Architecture02How I Refactored a Production Android SDK to MVVM Without Breaking a Single Publisher Integration6 min · Engineering03Agentic Engineering in Ad Tech: From Creative Review Loop to DSP Creative Ops for Apex Ads8 min · Agentic AI
05 / Contact

Hiring for mobile platform or applied AI leadership?

Let’s build the
hard part.

madhur.lalit2409@gmail.com

Based in Hamburg, Germany and relocating to Pune, India. Open to Staff Android, SDK platform and applied AI product opportunities.

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