DEVANSHU PATIL

Android developer building real-world products with Kotlin & Jetpack Compose. Exploring backend engineering, system design, and self-hosted infrastructure.

Pune , India Joined on Sep 6, 2026 https://devanshupatil.tech

Education

Computer Engineering Student

Pronouns

he/him

Work

Student & Independent Developer

DEVANSHU PATIL

Nov 1

Week 1 of Shipping a Privacy-First Finance App: What I Didn't Expect

#android #kotlin #architecture #fintech

3 min read

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DEVANSHU PATIL

Nov 1

My Jetpack Compose List Was Dropping Frames on ₹ Signs — Here's the Fix

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 31

Opening Balances Are Not Revenue — And Getting This Wrong Ruins Everything

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 31

Why Putting Financial Logic in the Database or UI Is a Disaster Waiting to Happen

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 30

Zero to Architecture: The First 5 Sprints That Shaped FinLedger

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 30

Building High-Contrast Finance UIs in Jetpack Compose Without a Design Team

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 29

The Silent Bug That Makes Every Transfer Look Like Income

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 29

How I Encrypt an Entire SQLite Database on Android Without Compromising Speed

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 28

Cash, Bank, UPI, or Credit Card? Why Your Finance App Must Treat Them Differently

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 28

The One Rule That Keeps Every Account Balance in FinLedger Honest

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 27

Why I Got Fed Up With Every Finance App and Built My Own From Scratch

#android #kotlin #architecture #fintech

4 min read

DEVANSHU PATIL

Oct 27

I Built a Finance App With Zero Cloud Servers — Here's Why

#android #kotlin #architecture #security

5 min read

DEVANSHU PATIL

Oct 26

Why Your Finance App Lies to You About How Much Money You Actually Have

#android #productivity #architecture #fintech

5 min read

DEVANSHU PATIL

Oct 26

PostgreSQL LISTEN and NOTIFY: Lightweight Pub-Sub Without External Message Brokers

#postgres #sql #backend #webdev

3 min read

DEVANSHU PATIL

Oct 26

Database Deadlocks in Production: Detection, Lock Trees, and Prevention Strategies

#postgres #sql #database #backend

3 min read

DEVANSHU PATIL

Oct 25

Optimizing PostgreSQL Covering Indexes: Using the INCLUDE Clause to Eliminate Table Lookups

#postgres #sql #performance #database

3 min read

DEVANSHU PATIL

Oct 25

Database Sharding Strategies: Hash-Based vs Range-Based Partitioning at Scale

#database #architecture #distributed #scalability

3 min read

DEVANSHU PATIL

Oct 25

Credit Card Payments Are NOT Expenses — Here's What They Actually Are

#android #kotlin #architecture #fintech

5 min read

DEVANSHU PATIL

Oct 25

B-Tree vs LSM-Tree Storage Engines: Write Amplification, Read Latency, and Compaction

#database #systems #performance #storage

3 min read

DEVANSHU PATIL

Oct 25

PostgreSQL pg_stat_statements: Identifying and Optimizing Slow Query Bottlenecks

#postgres #sql #performance #devops

3 min read

DEVANSHU PATIL

Oct 25

Database Connection Pooling: Why More Connections Kill Postgres Performance

#postgres #performance #backend #database

3 min read

DEVANSHU PATIL

Oct 25

Understanding PostgreSQL Index Types: B-Tree, GIN, GiST, BRIN, and When to Use Each

#postgres #sql #database #performance

3 min read

DEVANSHU PATIL

Oct 24

PostgreSQL MVCC Deep Dive: Vacuum, Dead Tuples, and Autovacuum Starvation

#postgres #database #sql #performance

3 min read

DEVANSHU PATIL

Oct 24

Consistent Hashing Explained: Virtual Nodes, Sharding, and Minimizing Cache Eviction

#dsa #distributed #caching #architecture

3 min read

DEVANSHU PATIL

Oct 24

Dead Letter Queue Strategies: Automated Retry Backoff and Poison Pill Isolation

#backend #architecture #kafka #devops

3 min read

DEVANSHU PATIL

Oct 24

Solving the Distributed Dual-Write Problem Without Two-Phase Commit

#architecture #database #backend #distributed

3 min read

DEVANSHU PATIL

Oct 24

Distributed Tracing with OpenTelemetry: Context Propagation and Span Correlation Across Services

#devops #observability #microservices #backend

3 min read

DEVANSHU PATIL

Oct 24

gRPC vs REST in Internal Microservices: Protobuf Serialization, Streaming, and Multiplexing

#grpc #api #microservices #performance

3 min read

DEVANSHU PATIL

Oct 23

Event Sourcing in Practice: Snapshots, Event Stores, and Temporal Queries

#architecture #database #microservices #backend

3 min read

DEVANSHU PATIL

Oct 23

CQRS Architecture: Separating Read and Write Models in High-Volume Systems

#architecture #softwareengineering #database #backend

3 min read

DEVANSHU PATIL

Oct 23

Saga Pattern in Microservices: Orchestration vs Choreography with Compensation Actions

#microservices #architecture #backend #cloud

3 min read

DEVANSHU PATIL

Oct 23

Distributed Locks with Redis: Redlock Algorithm, Clock Drift, and Fencing Tokens

#redis #concurrency #distributed #architecture

3 min read

DEVANSHU PATIL

Oct 23

Idempotent API Design: Implementing IETF Idempotency-Key Spec with Redis and SQL

#api #webdev #redis #backend

3 min read

DEVANSHU PATIL

Oct 23

The Transactional Outbox Pattern: Guaranteeing At-Least-Once Delivery to Message Brokers

#architecture #microservices #sql #backend

3 min read

DEVANSHU PATIL

Oct 22

Redis Streams vs Apache Kafka: Consumer Groups, Ack Semantics, and Offset Storage

#redis #kafka #distributed #backend

3 min read

DEVANSHU PATIL

Oct 22

State Management in Modern React: Zustand vs Redux Toolkit vs Context API

#react #javascript #frontend #webdev

3 min read

DEVANSHU PATIL

Oct 22

From University Student to Junior Software Engineer: Navigating the First 90 Days at a Tech Company

#career #productivity #softwareengineering #learning

3 min read

DEVANSHU PATIL

Oct 22

Profiling and Optimizing Python Code: CProfile, Line_Profiler, and Memory_Profiler

#python #performance #cleancode #programming

3 min read

DEVANSHU PATIL

Oct 22

Designing an Event-Driven Architecture with Webhooks: Delivery Guarantees and HMAC Signatures

#systemdesign #api #backend #security

3 min read

DEVANSHU PATIL

Oct 22

Linux Networking Troubleshooting: Netstat, SS, TCPDump, and Dig in Action

#linux #sysadmin #devops #networking

3 min read

DEVANSHU PATIL

Oct 21

Graceful Shutdown in Production Web Servers: Draining In-Flight Requests and Closing Connections

#backend #node #devops #docker

3 min read

DEVANSHU PATIL

Oct 21

Bit Manipulation Tricks for Competitive Programming and Technical Interviews

#dsa #algorithms #programming #interviewprep

3 min read

DEVANSHU PATIL

Oct 21

Mastering Java Reflection and Dynamic Proxies: How Spring and Hibernate Work Magic

#java #programming #architecture #softwareengineering

3 min read

DEVANSHU PATIL

Oct 21

Nginx Reverse Proxy Security: Rate Limiting, ModSecurity WAF, and SSL Hardening with Mozilla SSL Config

#nginx #security #devops #ssl

3 min read

DEVANSHU PATIL

Oct 21

Full-Stack MERN Best Practices: Monorepo Setup with Turborepo and Shared TypeScript Types

#mern #javascript #react #node

3 min read

DEVANSHU PATIL

Oct 21

The 12-Factor App Methodology in the Cloud-Native Era

#architecture #devops #softwareengineering #cloud

3 min read

DEVANSHU PATIL

Oct 20

Consistent Hashing: Designing Fault-Tolerant Distributed Caches and Storage Rings

#systemdesign #distributed #algorithms #architecture

3 min read

DEVANSHU PATIL

Oct 20

REST API Security Essentials: OWASP API Security Top 10 Illustrated

#security #api #backend #webdev

3 min read

DEVANSHU PATIL

Oct 20

Zero-Downtime Deployment Strategies: Blue-Green vs Canary vs Rolling Deployments

#devops #deployment #architecture #sysadmin

3 min read

DEVANSHU PATIL

Oct 20

Observability in Practice: Structured JSON Logging, Metrics with Prometheus, and Tracing

#devops #observability #backend #sysadmin

3 min read

DEVANSHU PATIL

Oct 20

Docker Container Security Best Practices: Rootless Containers, Capabilities, and Read-Only Filesystems

#docker #security #devops #linux

3 min read

DEVANSHU PATIL

Oct 20

Advanced Git Workflows: Git Submodules, Worktrees, and Sparse Checkouts

#git #productivity #devops #tooling

3 min read

DEVANSHU PATIL

Oct 19

Python Metaclasses and __init_subclass__: Framework Building and Class Introspection

#python #programming #cleancode #architecture

3 min read

DEVANSHU PATIL

Oct 19

MySQL Deadlocks: Detection, Analysis, and Prevention Strategies

#mysql #database #sql #backend

3 min read

DEVANSHU PATIL

Oct 19

Change Streams in MongoDB: Building Event-Driven Real-Time Architectures

#mongodb #backend #nosql #architecture

3 min read

DEVANSHU PATIL

Oct 19

Micro-Frontends with Module Federation: Breaking Down Monolithic Single Page Applications

#react #architecture #webdev #javascript

3 min read

DEVANSHU PATIL

Oct 19

Memory Leak Detection and Heap Profiling in Production Node.js Applications

#node #debugging #performance #backend

3 min read

DEVANSHU PATIL

Oct 19

Segment Trees and Fenwick Trees (Binary Indexed Trees): Efficient Range Queries and Point Updates

#dsa #algorithms #datastructures #programming

3 min read

DEVANSHU PATIL

Oct 18

Shortest Path Algorithms: Comparing Dijkstra, Bellman-Ford, and Floyd-Warshall

#dsa #algorithms #computerscience #interviewprep

3 min read

DEVANSHU PATIL

Oct 18

Java 21 Scoped Values: Replacing ThreadLocal with Safer, Immutable Contexts

#java #concurrency #backend #performance

3 min read

Writing Debut

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