Sirajul islam

Software Developer .

[Aastha @aastha_mhaske]

Here’s your

100+ LeetCode Problems with Solutions

Perfect for mastering coding interviews and problem-solving in 2025!

All, FREE of cost!

Simply:

1. Follow me (So I can DM)
2. Like & Repost
3. Comment "LeetCode" to receive the guide.

Let’s ace those coding interviews together!

[Sirajul islam @progsirajul]

@elonmusk Robot Vs Human 🦾💪

[Sirajul islam @progsirajul]

@aastha_mhaske Sql

[Krishna Agrawal @Krishnasagrawal]

Most asked 50 SQL Interview Queries, only in 20 pages.

[Sirajul islam @progsirajul]

@VisualStudio Great news.

[Sirajul islam @progsirajul]

@elonmusk 🙅‍♂️🙋‍♂️

[Sirajul islam @progsirajul]

@pannaa_ai Gmail

[Sirajul islam @progsirajul]

@dian_arifiya 🙃🫢

[Sirajul islam @progsirajul]

@sabir_huss50540 Send

[Sirajul islam @progsirajul]

@BharukaShraddha Thank you

[Job Corner @JOBCORNER247]

40 websites to find remote jobs and earn in USD in 2025:

[Security Trybe @SecurityTrybe]

75+ Linux commands every user should know

[Dhanian 🗯️ @e_opore]

100 Backend Development Concepts to Master before Interviews 👇

1. Client-Server Architecture
2. HTTP/HTTPS Protocols
3. RESTful APIs & GraphQL
4. CRUD Operations
5. Authentication & Authorization
6. Database Design
7. Indexing, Joins, Transactions
8. Caching
9. Message Queues
10. Microservices vs Monoliths
11. API Rate Limiting & Throttling
12. Load Balancing & Reverse Proxy
13. Scaling
14. Deployment
15. Logging & Monitoring
16. Error Handling & Debugging
17. Security Best Practices
18. Testing
19. Distributed Systems Basics
20. Fault Tolerance & High Availability
21. API Versioning
22. WebSockets & Real-Time Communication
23. gRPC & RPC Frameworks
24. Database Replication & Sharding
25. Data Migration Strategies
26. Connection Pooling
27. Database Normalization & Denormalization
28. ORM Tools (Sequelize, Hibernate, TypeORM)
29. Database Backup & Recovery
30. API Documentation (Swagger, OpenAPI)
31. Middleware in Backend Frameworks
32. Content Delivery Networks (CDN)
33. Serverless Architectures (AWS Lambda, Azure Functions)
34. Cloud Platforms (AWS, GCP, Azure)
35. Secrets Management (Vault, AWS Secrets Manager)
36. Environment Variables & Configuration Management
37. CI/CD Pipelines
38. Container Orchestration (Kubernetes, ECS, Nomad)
39. Infrastructure as Code (Terraform, Ansible, Pulumi)
40. Service Discovery (Consul, Eureka, Zookeeper)
41. Reverse Engineering APIs
42. Rate Limiting Algorithms (Token Bucket, Leaky Bucket)
43. Data Serialization (JSON, XML, Protobuf, Avro)
44. File Storage (S3, MinIO, GridFS)
45. Distributed Caching Strategies
46. Event-Driven Architectures
47. Circuit Breaker Patterns
48. API Gateways (Kong, NGINX, AWS API Gateway)
49. Middleware for Security (Helmet, CSRF Tokens)
50. Session Management (Cookies, Local Storage, Redis-backed sessions)
51. Horizontal Partitioning & Vertical Partitioning
52. Hashing Algorithms (MD5, SHA, bcrypt, Argon2)
53. Data Encryption (AES, RSA)
54. Logging Strategies (Structured vs Unstructured Logs)
55. Observability (Tracing with Jaeger, OpenTelemetry)
56. Data Consistency Patterns (Eventual vs Strong Consistency)
57. Saga Pattern for Microservices
58. Blue-Green & Canary Deployments
59. Edge Computing in Backend Systems
60. Performance Tuning (Query Optimization, Profiling)
61. Multi-Tenancy Architecture
62. Database Indexing Strategies
63. ACID vs BASE Properties
64. Leader Election in Distributed Systems
65. Consensus Algorithms (Raft, Paxos, ZAB)
66. API Caching Strategies (Client, Proxy, Server-side)
67. Graph Databases (Neo4j, ArangoDB)
68. Time-Series Databases (InfluxDB, TimescaleDB)
69. Event Sourcing Pattern
70. CQRS (Command Query Responsibility Segregation)
71. Batch Processing (Hadoop, Spark)
72. Stream Processing (Kafka Streams, Flink, Storm)
73. Idempotency in APIs
74. Dead Letter Queues (DLQ)
75. Backpressure Handling
76. API Pagination Strategies (Offset, Cursor)
77. Soft Deletes vs Hard Deletes
78. Webhooks & Callbacks
79. Content Negotiation in APIs
80. Static vs Dynamic Scaling
81. Multi-Region Deployments
82. Data Localization & Compliance (GDPR, HIPAA)
83. API Observability (Metrics, Traces, Logs)
84. Distributed Transactions (Two-Phase Commit, Saga)
85. Zero Downtime Deployments
86. Hot vs Cold Backups
87. Security Auditing & Penetration Testing
88. Secure Password Storage & Management
89. Secret Rotation Strategies
90. API Security Standards (OWASP, OpenID Connect)
91. Role-Based Access Control (RBAC)
92. Attribute-Based Access Control (ABAC)
93. Policy as Code (OPA, Kyverno)
94. Chaos Engineering & Resilience Testing
95. Hybrid Cloud Architectures
96. API Mocking & Testing Tools (Postman, Newman)
97. Server-Side Rendering & Backend for Frontend (BFF)
98. Session Stickiness in Load Balancing
99. Service Mesh (Istio, Linkerd)
100. Future Trends (AI in Backend, Quantum-Safe Encryption, Edge AI)

✅ For a complete Backend Course with Projects, check out this ebook:
https://t.co/IJN0CoY9ej

[Mashood K @fromcodetocloud]

📌Important Tools in every stage

🔸Code: Git
🔸Build & CI: Jenkins or GitHub Actions
🔸Deployment: Kubernetes + Docker
🔸Infrastructure: Terraform
🔸Monitoring: Prometheus/Grafana

[Sirajul islam @progsirajul]

৭১ কে ছোট করে কারা? পাকিস্তানের দালালেরা।

২৪ কে ছোট করছে কারা? ভারতের দালালেরা।

৪৭। ৭১। ২৪

আমাদের স্বাধীনতা আর সার্বভৌমত্বের ৩ টা মাইলফলক। আমাদের বিপ্লব, বিদ্রোহ আর ভালোবাসার তিনটা স্তম্ভ।

এই তিনের কোন একটাকে যে ছোট করতে চাইবে, সে কোন না কোন প্রভুর সেবাদাস।

#Bangladesh

[Chief Adviser of the Government of Bangladesh @ChiefAdviserGoB]

UN Secretary General Antonio Guterres calls on Chief Adviser Professor Muhammad Yunus at the Chief Adviser’s Office in Dhaka on Friday.

[Chief Adviser of the Government of Bangladesh @ChiefAdviserGoB]

Had great meeting with Mr @elonmusk. We agreed to work together. Hoping to launch Starlink in Bangladesh soon together with him

[Sirajul islam @progsirajul]

https://t.co/JyzrEDGkkq

[Sirajul islam @progsirajul]

@AzhariTweets মাশাআল্লাহ

[Sirajul islam @progsirajul]

সূর্যটা ও মাঝে মাঝে মেঘে ঢাকা পড়ে আর আমি! #Bangladesh #NewWorld #tourist #Travel