~/rajtilak
Rajtilak Bhattacharjee

Rajtilak Bhattacharjee

Machine Learning Engineer
Location
Kolkata, India
Email
rajtilakjee@gmail.com

I build AI-powered products and software systems from first principles, obsessing over clean architectures, computational efficiency, and small details that make software feel right to use. Currently building with Python, PyTorch, TypeScript, and Next.js.

Open to AI consulting, freelance & high-impact full-time roles
GitHub ContributionsSepOctNovDecJanFebMarAprMayJunJulAugSep
560 contributions in 2026 on GitHub.
Less0 contributions1 contributions2 contributions3 contributions4 contributionsMore

Tech Stack

Python
FastAPI
NumPy
Pandas
PostgreSQL
MySQL
Git
GitHub
Bitbucket
Docker
Cursor AI
Antigravity
ChatGPT
Tableau

Featured Projects

·
176
Popular (170+ Stars)
Simone

Simone

Repurpose YouTube videos by converting speech and context into polished, SEO-optimized technical blog posts using LLMs.

PythonOpenAIFastAPINLPWhisper
Deep Systems
SearchCraft

SearchCraft

Building a search engine from scratch in Python to explore search mechanics, crawler architecture, inverted indexes, and BM25/PageRank from first principles.

PythonInformation RetrievalAlgorithmsIndexingSystems
73
KeepYourMouthShut

KeepYourMouthShut

Acid Reflux for your Ears! An experimental AI podcast and audio generation project integrating OpenAI language models with ElevenLabs high-fidelity voice synthesis.

PythonElevenLabsAudio AIOpenAIStreamlit
58
Kivo

Kivo

A lightweight, minimal desktop teleprompter for creators, streamers, and presenters with seamless speed controls and transparent overlay modes.

PythonPyQtGUIDesktop
22
ThisIsNotADinosaur

ThisIsNotADinosaur

Jurassic or Just-a-pic? A computer vision deep learning classifier that predicts whether an image contains prehistoric reptiles or everyday objects.

PythonPyTorchComputer VisionDeep Learning
Pandal Map

Pandal Map

Interactive geospatial web application for discovering and navigating Kolkata Durga Puja pandals with crowdsourced updates and route guidance.

TypeScriptNext.jsLeaflet MapsTailwind CSS
3
Touch for Windows

Touch for Windows

A lightweight implementation of the Unix touch command built for Windows developers, supporting timestamps, file creation, and batch updates.

PythonCLIWindowsDeveloper Tools

Experience

  1. Full-stack Developer/Project Lead

    ·Cadana
    Jul 2024 — Jul 2026
    Denmark (Remote) · Remote
    • Built and maintained 4 full-stack web applications for logistics and district heating companies using Python, FastAPI, and Angular.
    PythonFastAPIAngular

  2. Technical Content Writer for Blogs

    ·Freelancing
    Jul 2021 — Jul 2022
    China (Remote) · Remote
    • Authored SEO-optimized technical reviews, guides, and product comparisons for product-based websites including UUByte and PassGeeker.
    • Managed and maintained clients' WordPress blogs.
    WordPressSEOTechnical Writing

  3. Machine Learning Engineer

    ·CloudxLab
    Apr 2020 — Jun 2021
    Bengaluru (Remote) · Remote
    • Served as Teaching Assistant for AI/DL courses in partnership with IIT Roorkee, managing course materials and resolving student technical queries for a batch of 20 students.
    • Conducted weekly Root Cause Analysis on user behavior to optimize course materials and maximize engagement.
    PythonMachine LearningDeep LearningRoot Cause Analysis

  4. Manager

    ·PwC Service Delivery Center
    Jul 2018 — Aug 2019
    Kolkata, India · Full-Time
    • Led operations for the Data Visualization team of 5+ resources, managing shift operations, business reviews, and leadership presentations.
    • Managed client relationships, handled escalations, and identified cross-territory business opportunities across NA, EMEA, and APAC.
    • Served as Digital Champion; trained teams in Tableau, Alteryx, and UIPath while acting as the primary POC for automation and data analysis.
    • Achievements: Generated 18,000 hours via Business Development (FY18-19). Developed 5 award-winning automation processes that saved 20,000 hours in a single fiscal year.
    TableauAlteryxUiPathData VisualizationProcess Automation

  5. Senior Associate 2

    ·PwC Service Delivery Center
    Jul 2012 — Jun 2018
    Kolkata, India · Full-Time
    • Founded and scaled the Data Visualization team from scratch; managed operations for the Brand & Marketing team constituting of 110 resources.
    • Drove client management, identified international pipeline opportunities, and served as cross-team Resource Manager.
    • Designed and deployed VBA macros and process automation plans across multiple teams.
    • Achievements & Awards: Saved ~8,000 hours annually via automation. Won the Best Innovation Award (2016) for a billing tool that saved 22 days of manual effort per year. Received the Star Award (2017) and two Spot Awards for managing high-complexity engagements (including one clocking 14,000 hours in 2 months).
    VBAMacrosProcess AutomationData VisualizationOperations

  6. Consultant

    ·PwC Pvt Ltd
    Oct 2010 — Jul 2012
    Kolkata, India · Full-Time
    • Managed operations for the Brand & Marketing team and generated performance reports for stakeholders.
    • Handled client relationships, resolved queries, and managed escalations via email and teleconferences.
    Operations ManagementPerformance ReportingClient Relations

  7. Associate

    ·Wipro BPO
    Nov 2009 — Oct 2010
    Kolkata, India · Full-Time

  8. Customer Support Associate

    ·123Greetings.com
    Nov 2007 — Nov 2008
    Kolkata, India · Full-Time

  9. Senior Customer Care Executive

    ·BNKe Solutions
    Sep 2005 — Jul 2007
    Kolkata, India · Full-Time

  10. Technical Support Executive

    ·Wipro Spectramind
    Jul 2004 — Mar 2005
    Kolkata, India · Full-Time

  11. Technical Support Executive

    ·ExL Pvt. Ltd.
    Sept 2003 — Jan 2004
    Kolkata, India · Full-Time

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rajtilakjee@gmail.com

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Open to AI consulting, freelance & full-time

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“The best way to understand how something works is to build it from scratch.”

— First Principles Thinking

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