Viren

India — on-site nationwide, remote worldwide

Technical LeadMobile App DevelopmentAI DevelopmentCorporate TrainerSpeed Cuber

Technical Lead building production mobile and AI systems — multi-agent workflows, agentic RAG, and apps with 50M+ downloads behind them. I also train engineering teams to do the same: 120+ programmes delivered to 1500+ professionals across Agentic AI, LLMOps and mobile development.

Viren Gajjar speaking at a corporate training session — Technical Lead in mobile app and AI development

Lead Application Developer · Signify

Open to lead roles and corporate training engagements

01 — What I do

One lead, three disciplines.

Mobile and AI are the same job now — I architect both inside the same products. Training is the third thing, and it is better for the other two: every lab comes out of a system that shipped.

01Mobile App Development

Mobile apps, led end to end.

Eight years of Android and iOS delivery — Flutter, React Native, SwiftUI and Kotlin. Architecture, review standards and release engineering for products that have to survive a second team.

Mobile training programmes
  • Flutter, Dart, React Native, SwiftUI, Kotlin
  • Clean architecture, MVVM, hexagonal, TDD
  • CI/CD on Bitrise, CodeMagic, GitLab CI and Jenkins
  • Shipped apps totalling 50M+ downloads

02AI Development

Agentic AI, in production.

Multi-agent systems, agentic RAG pipelines and GenAI features built into live products — LangGraph, LangChain, CrewAI, MCP and the OpenAI API, with the LLMOps discipline to keep them running.

AI training programmes
  • Multi-agent systems with LangGraph and LangChain
  • Agentic RAG pipelines and retrieval design
  • GenAI features: search, summarisation, recommendations, chat
  • LLMOps, MCP and AI-assisted development workflows

03Corporate Training

A hundred and twenty programmes in.

Corporate training across Agentic AI, LLMOps and mobile engineering — 1500+ professionals trained, rated 4.7/5. Plus community sessions at Flutter Ahmedabad, GSDC WOW and AI meetups.

Training programmes
  • 120+ corporate trainings delivered across industries
  • Agentic AI curriculum: LangGraph, CrewAI, RAG, MCP, hands-on labs
  • Mobile engineering: architecture, testing, release practice
  • GenAI enablement for enterprise clients and their teams

Also on the CV

Sprinklr implementation, AEM, Datadog and AWS — plus the enterprise integration work that comes with delivering inside large programmes. Unglamorous, and the reason the product side makes sense.

02 — About

Eight years of shipping, spent on the parts that outlast the demo.

I'm a Technical Lead who still writes the code. Eight years across mobile and, increasingly, AI — currently leading application development at Signify, where I architect multi-agent systems with LangGraph and LangChain alongside the smart-home surfaces they run in.

The mobile half is the foundation: Flutter, React Native and native work behind apps with more than 50 million downloads, built on clean architecture and test coverage that actually catches things.

The third thing I do is teach. A hundred and twenty-plus corporate trainings, 1500+ professionals, rated 4.7 out of 5 — and before any of that, I founded a Rubik's cube academy and coached 50+ students in algorithmic thinking. Explaining hard things clearly is the skill underneath all of it.

  • 01

    Production, not slideware

    Every training example comes out of systems I ship during the week.

  • 02

    Measured outcomes

    20% faster delivery, 30% performance gain, 40% deployment efficiency.

  • 03

    Both sides of the room

    Enterprise squads and packed auditoriums alike — 120+ sessions delivered.

  • 04

    Algorithmic thinking

    National-level speed cuber; founded Unscramble Rubik's Cube Academy.

Viren Gajjar delivering a corporate training session
Viren Gajjar working on a mobile and AI application build

Where I work

India

On-site training anywhere in the country, remote delivery worldwide. Eight years of squad work with teams across India, the Netherlands and Spain.

  • 8+

    Years of experience

    Engineering, leading and teaching

  • 120+

    Trainings delivered

    Agentic AI, LLMOps, mobile

  • 1500+

    Professionals trained

    Across industries and roles

  • 50M+

    App downloads

    Across products shipped

03 — AI development & training

Agentic AI, built before it’s taught

Multi-agent systems with LangGraph and LangChain, agentic RAG, CrewAI and MCP — architected in production at Signify, then turned into corporate training.

  • Agentic workflows with LangGraph

    Graph-based control flow, state, checkpoints and human-in-the-loop — the architecture that makes multi-step agents reliable instead of impressive once.

    • LangGraph
    • State machines
    • Human-in-the-loop
  • Building agents with LangChain & CrewAI

    Chains, tools, memory and multi-agent crews assembled into systems that do a defined job — with the observability to work out why they failed.

    • LangChain
    • CrewAI
    • Tool use
  • RAG pipelines that actually retrieve

    Chunking, embeddings, retrieval strategy and evaluation. Agentic RAG for when a single lookup is not enough.

    • RAG
    • Embeddings
    • Evaluation

04 — Mobile development & training

Mobile apps, 50M+ downloads deep

Flutter, React Native and native delivery inside enterprise programmes — and the training that gets a team from picking a framework to shipping it well.

  • Flutter fundamentals to production

    Widgets, state management and platform channels — then the parts teams actually trip on: navigation at scale, build flavours and store releases.

    • Flutter
    • Dart
    • Releases
  • Architecture that survives handover

    Clean architecture, MVVM and hexagonal boundaries, taught against a real feature rather than a to-do list demo.

    • Clean architecture
    • MVVM
    • Hexagonal
  • Testing and TDD for mobile

    What to test, what not to, and how to reach coverage the team trusts enough to actually run. Built on a 95%-coverage production codebase.

    • Unit testing
    • TDD
    • Test strategy

05 — Experience

Where the eight years went

Freelance builds, then enterprise delivery at TCS, CGI and Tech Mahindra, and now leading application development at Signify. Mobile throughout; AI from the moment it was useful.

2019 → Present

Five roles, one throughline: systems a second team can still work in — and teams that know why.

  1. Lead Application Developer · Signify

    Present

    Leading application development across smart-home and connected lighting surfaces, with AI systems built into the product rather than bolted beside it.

    • Architected multi-agent AI systems using LangGraph and LangChain with agentic RAG pipelines — 20% reduction in development time and 30% performance gain across smart-home workflows.
    • Integrated GenAI recommendations and chatbots via the OpenAI API and LangChain, improving user engagement 35% across smart lighting control surfaces.
    • Implemented real-time code push with Shorebird, cutting app update time by 99% with no App Store or Play Store submission.
    • LangGraph
    • LangChain
    • Agentic RAG
    • OpenAI API
    • Flutter
    • Shorebird
    • System Design
  2. Mobile Lead & AI Integration Specialist · Tech Mahindra

    Led mobile delivery on a scalable commerce platform while running the internal AI enablement track for the wider engineering team.

    • Spearheaded a scalable eCommerce platform across mobile and web serving 100K+ users, with GenAI-powered search and personalised recommendations via LLM embeddings.
    • Designed and delivered internal AI training workshops on prompt engineering, LangGraph and agentic workflows for a cross-functional team of 10+ developers.
    • Flutter
    • LLM Embeddings
    • GenAI Search
    • Prompt Engineering
    • LangGraph
    • Team Leadership
  3. Sr. Software Engineer · CGI

    Senior engineer on enterprise delivery, and the person who brought AI-assisted workflows into the team — then taught them to clients.

    • Introduced AI-assisted development workflows using LLMOps practices and automation tooling — 40% better deployment efficiency and 35% shorter code review cycles.
    • Delivered GenAI enablement sessions for enterprise clients covering RAG pipelines, OpenAI API integration and responsible AI practices.
    • LLMOps
    • RAG
    • OpenAI API
    • Responsible AI
    • Flutter
    • Clean Architecture
    • CI/CD
  4. System Engineer · Tata Consultancy Services

    Mobile delivery at consumer scale, and the engineer who dragged the test suite into shape.

    • Led design and development of high-impact Android and iOS applications amassing over 50 million downloads.
    • Built a quality culture reaching 95% test coverage through targeted unit and integration tests, resolving the three main causes of application crashes.
    • Android
    • iOS
    • Kotlin
    • Unit Testing
    • TDD
    • System Design
  5. Mobile Application Developer · Freelance

    Independent mobile delivery across a deliberately wide range of domains — the range is why nothing feels unfamiliar now.

    • Built 10+ mobile applications across Android, iOS and PWA, contributing to 42% user retention growth.
    • Portfolio spanning chat platforms, ERP, social networking, medical fitness and ride hailing; 10K+ downloads.
    • Android
    • iOS
    • Flutter
    • PWA
    • JavaScript

Education & deep dives

  • Jun 2016Aug 2020

    B.E, Computer Engineering

    Gujarat Technological University

  • 2022Present

    Clean Architecture & SOLID

    Applied across enterprise delivery

  • 2020Present

    Unit Testing & TDD

    95% coverage in production codebases

  • 2023Present

    Agentic AI & LLMOps

    Self-directed, then taught to teams

06 — Capabilities

What I actually work in

Grouped by the job it does, not by a self-assigned percentage.

AI / ML

Agentic systems, built and taught.

  • GenAI
  • Prompt Engineering
  • LangGraph
  • LangChain
  • RAG
  • Agentic Workflows
  • CrewAI
  • LLMOps
  • MCP
  • OpenAI API

Mobile & Front-end

Cross-platform first, native underneath.

  • Flutter
  • Dart
  • React Native
  • SwiftUI
  • Kotlin
  • JavaScript
  • HTML5
  • CSS

Architecture & Quality

The part that decides whether year two is any fun.

  • Clean Architecture
  • MVVM
  • Hexagonal
  • MVC
  • TDD
  • Unit Testing
  • SOLID
  • DRY
  • System Design

Backend, Cloud & CI/CD

Everything between the commit and the store.

  • NodeJS
  • Python
  • AWS
  • Datadog
  • AEM
  • Bitrise
  • CodeMagic
  • GitLab CI
  • Jenkins
  • GitHub
  • Bitbucket

Training & Enterprise

Teaching it, and the enterprise platform work around it.

  • Corporate Training
  • Agentic AI Curriculum
  • Mobile Engineering Curriculum
  • Technical Mentoring
  • Public Speaking
  • Sprinklr Implementation

How that gets bought

  • Corporate AI training

    Agentic AI · LangGraph · CrewAI · RAG · MCP

    Programmes that take a team from curiosity to production — agents they can debug and automations they can maintain.

  • Corporate mobile training

    Flutter · React Native · Architecture · CI/CD

    From "we picked a framework" to shipping it well: architecture, testing and release practice for an existing team.

  • Technical leadership

    Mobile · AI · Team management

    Leading delivery teams — architecture decisions, review standards, release engineering and the hiring bar.

  • AI systems development

    LangGraph · LangChain · RAG · OpenAI API

    Multi-agent systems and GenAI features built into real products, with the LLMOps discipline to keep them alive.

  • Mobile app development

    Flutter · React Native · Android · iOS

    End-to-end product builds. Cross-platform where it saves money, native where it does not.

  • Consultancy

    Architecture · Delivery · AI adoption

    Architecture reviews, delivery process and an outside read on whether AI belongs in the problem at all.

07 — Corporate training

Corporate training, run by someone who still ships.

A hundred and twenty-plus programmes delivered to 1500+ professionals, rated 4.7 out of 5. Most training decks are written by people who left production years ago — mine come out of the systems I work in during the week, which is why the awkward questions get real answers.

08 — Selected work

Things that shipped

Mobile products across mobility, commerce, fintech and health — built solo or as part of a squad.

Swipe for more · 52 projects delivered to date

All work & enterprise delivery

08 — In their words

Six people who worked with me

Project managers, squad leads and product owners from TCS, Voltas and Signify. Unedited.

Viren is an asset to any team. Through his continuous quest of innovation and excellence, he has been able to save a huge amount of cost within the project and always ensures to lead the team in best possible manner. I would highly recommend him to any project.

Harshal ParikhProject Manager · TCS

Viren is a star of any project for his extra ordinary capabilities and courageous behaviour. I remember we had some POC's pending for RPA which was completely different from his skillset, still he took up the challenge and not just delivered the POC's but also successfully completed the project. Highly appreciate his efforts and hard work.

Sam PhilipProject Head · Voltas

You are a very pleasant guy to have on board of a project. Clear in your communication, not afraid to approach or chase people and always with a positive mindset. You always bring positive atmosphere into the room. Your willingness to learn, take on new challenges is really admirable. Throughout all of the projects I have done I think you rank as one of the highest on this.

Joost MobertsSquad Lead · Signify

We onboarded Viren to lead our mobile app team, and we couldn’t be happier with the results. The app was delivered on time and within our budget, and it has already attracted over 10,000 downloads in just six months. It’s been a pleasure working with Viren.

George WilsonProject Head · Voltas

We didnt share squad for so many sprints but it took me one meeting to clearly see that you are a superstar, super proactive, intelligent and hard worker. I am sure that your attitude will take you wherever you want, do not change, because it is a real pleasure to work with people like you! All the best in the future, whatever you need, you have a friend in Spain.

Pablo TajedaProduct Owner · Signify

Viren is a highly valued team member contributing to his squad but also to the project overall (other squads). Pro active attitude which makes him visible for all team members over all 4 squads. Progressed in his development skills and in his professional attitude overall. Viren is continuously working on his development as professional by seeking feedback and picking up tasks also outside of his comfort zone. Good communication and presentation skills.

Erwin van TeeselingSquad Lead · Signify

09 — Contact

Let's work together.

A team to train, a lead role to fill, an AI system to build, or an idea you want a second opinion on — start here. LinkedIn is the fastest route; the form reaches the same inbox.

Availability

India — on-site nationwide, remote worldwide

On-site training delivered across the country; remote cohorts run worldwide. Working hours IST (UTC+5:30), flexible for other zones.

Send a brief

Team size, timeline, what you want them to be able to do afterwards. Rough is fine.

Usually replies within a working day.