Open to full-time roles and freelance projects

Hi, I'm Dabobroto

Dabobroto Sarkar · also written Debobroto · দেবব্রত সরকার

Software Engineer • Java/Spring Boot Specialist

Backend Engineer with 4 years of experience designing scalable microservices. Proven track record at RedDot Digital reducing costs by 60% via automation.

View ExperienceDownload CVGet in Touch

Technical Skills

Technologies and tools I work with to build robust, scalable systems

Backend Development

JavaSpring BootSpring AIREST APIsJPA/HibernatePython

Event Streaming

Apache KafkaEvent SourcingCQRSMicroservices

Databases

PostgreSQLOracleRedisDatabase OptimizationClickHouse

Frontend

AngularTypeScriptRxJSTailwind CSS

DevOps & Observability

DockerKubernetesGoogle CloudCI/CDOpenTelemetrySignoz

AI & LLMs

Prompt EngineeringRLHFLLM IntegrationSpring AI
4
Years Experience
150M+
Records Processed
60%
Cost Reduction
99.9%
Maintained Uptime

Work Experience

A journey through impactful roles building scalable systems

Foodi Express Limited

Software Engineer

2025 - Present
Dhaka, Bangladesh

Building a microservices-based ride-sharing platform integrating with a food delivery platform for the Bangladesh market under US-Bangla Group.

  • Leading a specific microservice while collaborating with an international team
  • Designed event-driven architecture using Kafka and Spring Boot handling high-throughput events
JavaSpring BootKafkaPostgreSQLDockerKubernetes

Outlier.ai

AI Model Trainer

2025
Remote

Improving large language models through RLHF and prompt engineering.

  • Writing and refining system prompts to shape AI behavior
  • Performing RLHF (Reinforcement Learning from Human Feedback) to improve model quality
  • Evaluating and ranking AI-generated responses for accuracy and helpfulness
RLHFPrompt EngineeringLLMsPython

RedDot Digital Limited

Software Engineer

2022 - 2025
Dhaka, Bangladesh

Built enterprise-grade portals and backend systems for Robi Axiata, one of the largest telecom operators in Bangladesh.

  • Built the Mobireach portal that sends promotional SMS for brands like Chaldal.com, integrating PortPos payment gateway
  • Implemented SIM security features for Robi/Airtel customer care (DOB/NID verification for stolen phone complaints)
  • Customized Signoz (Open Telemetry) to monitor 200+ microservices across Robi infrastructure
  • Deployed Papermerge as an in-house document management system (like Google Drive)
  • Built an automation portal (Angular + Spring) that reduced operational time from 3 hours to 30 seconds, cutting costs by 60%
JavaSpring BootAngularTypeScriptOraclePostgreSQLKafkaDocker

Featured Work

Things I build outside of work — shipped, published, and live for anyone to install.

LekhaScan

LekhaScan

Bangla & English document scanner for Android

Built for my father, who used to photograph every page, run each through OCR and paste the text into Word by hand. LekhaScan does it in one go: photograph the pages, get one combined PDF or Word file back. Bangla recognition runs on the phone and works offline. Live on Google Play since September 2026.

Java Android CameraX OpenCV ML Kit Tesseract Firebase
  • On-device Bangla and English recognition — photos are never uploaded
  • Automatic page detection, perspective correction and four scan filters
  • Exports PDF and Microsoft Word (.docx), multi-page documents included
  • Fully bilingual app: Bangla and English
  • No account, no sign-up, no watermark
Get it on Google PlayDetailsPrivacy
Sticky Notes

Sticky Notes

The lightest, prettiest sticky notes app on Linux

A frameless desktop sticky-notes app for Linux, built end-to-end with Python and PyQt6 and published to the Snap Store for one-command install on any distro. About 26 MB installed, with no cloud, no account and no telemetry. Now at v3.5.1, with 2,800+ users in 130+ countries.

Python PyQt6 Snapcraft Linux
  • 2,800+ users across 130+ countries
  • Frameless UI with 7 color themes and collapse-to-title
  • Rich text — bold, italic, underline, strikethrough, lists and checklists
  • Pin notes always on top; lives in the system tray
  • MIT licensed, one-command install via the Snap Store
$sudo snap install stickynotes-dabobroto
Get it from the Snap StoreDetailsSourcestickynotes-dabobroto on Snap Store

Work with me

I'm a Java and Spring Boot engineer based in Dhaka, Bangladesh, open to full-time roles and freelance projects, including remote work.

Backend & APIs

REST APIs and backend services in Java and Spring Boot, from a first version to production, with the database design behind them.

JavaSpring BootRESTPostgreSQLJPA

Microservices & scale

Event-driven microservices with Kafka, database optimisation, and containerised deployments that hold up under load.

Apache KafkaMicroservicesRedisDockerKubernetes

Apps & full products

Complete products shipped to real stores: an Android app on Google Play and a Linux app on the Snap Store, with the web side in Angular.

AndroidAngularGoogle CloudCI/CD

Flexible, project-based pricing.

Tell me what you're building and what you need.

contact@dabobrotosarkar.comDownload CV

Technical Writing

I write about Java, Spring Boot, and System Architecture. Check out my latest articles on Medium.

© 2026 Dabobroto Sarkar. Built with using Spring Boot & Angular