Years
2+
Backend engineering across platform APIs, asynchronous workers, and database-heavy tooling.
Patna, Bihar · Datachecks · Backend Engineering
Neeraj Kumar
Backend engineer building APIs, diff engines, async workers, and database-heavy systems.
Backend engineer at Datachecks optimizing APIs, data performance, and enterprise deployments.
FastAPI servicesCelery performanceDatabase integrationsEnterprise deployment
APIs Built
10+
Public APIs, internal services, chatbot flows, and developer-facing backend endpoints.
Systems
4+
Comparison engine, control plane API, chatbot integrations, and scraping-backed products.
Records
10M+
Comparison, validation, and scraping workflows operating over large structured datasets.
DB Targets
10+
MSSQL, MySQL, Oracle, Databricks, Sybase IQ/ASE, Presto, Trino, and more.
Current work
Datachecks
Current backend ownership across diff performance, Celery execution, database integrations, and enterprise delivery.
Datachecks
/Dec 2023 – Present
SDE-I · Backend Engineer
Datachecks (PLOUTOS AI TECHNOLOGIES PRIVATE LIMITED) · India
Core backend ownership across Datachecks' comparison platform: API services, Celery-backed execution, data-diff performance, multi-database integrations, and enterprise deployment workflows.
FastAPI control planeCelery workersComparison engine tuningDatabase connector integrationsOffline enterprise deployment
Major achievements
- Replaced hash-based diffing with memory-based diffing to improve large-table comparison throughput.
- Implemented a per-column diff threshold strategy so over-sampled columns are skipped and compute is redirected toward broader difference coverage.
- Extended platform compatibility across MSSQL, MySQL, Oracle, Databricks, Sybase IQ, Sybase ASE, Presto, and Trino.
- Delivered a full air-gapped deployment on a bank-owned RHEL server with zero internet access.
- Built Croma WhatsApp backend flows for Demo Installation Status, Request Installation, and My Account.
- Improved Celery worker stability for long-running validation and comparison tasks.
Platform areas
Stormbreaker
Control Plane APIFastAPI service layer orchestrating comparison jobs, async execution, reporting, and deployment-ready operational workflows.
FastAPICeleryRabbitMQPostgreSQL
DCS SDK
Comparison EngineConfig-driven CLI and SDK for cross-database validation, schema checks, row diffing, reporting, and result packaging.
PythonClickSQLAlchemyJinja2
Enterprise Deployment
Air-Gapped InfraEnd-to-end offline deployment for a bank environment on RHEL, including dependency packaging and isolated runtime setup.
RHELDockerPython packagingSystem configuration
Croma WhatsApp Flows
Service AutomationCustomer-facing backend flows layered on platform services for installation tracking and account requests.
FastAPIWorkflow APIsService integrations
Selected public work
Public backend work
A single view of the repositories, adoption, and maintenance signal that can be verified directly.
01
2022 – Present
Torrent-Api-py
Torrent-Api-py
FastAPI scraping API that normalizes search, trending, recent, and detail endpoints across 15+ torrent providers behind one stable interface.
PythonFastAPIaiohttpBeautifulSoup
401247
Open case study
02
2022 – 2023
DogeTheBot
DogeTheBot
WhatsApp automation bot with group controls, media commands, authorization, and a built-in coding playground for C, Python, and Node.js.
Node.jsJavaScriptwhatsapp-web.jsPuppeteer
78
Open case study
03
2023 – 2024
UMS-Api
UMS-Api
Unofficial FastAPI service for LPU's UMS and placement portal with ASP.NET session handling, HTML parsing, and structured JSON endpoints.
PythonFastAPIBeautifulSoupaiohttp
174
Open case study
LeetCode
Problem solving signal
Current solved count, ranking, and recent accepted submissions from the public LeetCode profile.
Solved
158
Global ranking
957,025
Contests
5
top 22.1%
Easy
107/ 929
beats 91%
Medium
47/ 2019
beats 73%
Hard
4/ 912
beats 40%
Contest rating
1,609
Badges
No public badges shown right now.
Recent accepted submissions