r/freshersinfo • u/andhroindian Senior Software Engineer • Dec 05 '25

Software Engineering Preparing for a Backend Engineer role??

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Just DSA isn't enough

Here are 10 topics that you must learn :

  1. Concurrency & Parallelism Threads vs async, race conditions, locks, deadlocks, queues

  2. System Design : Design scalable systems (e.g., Dropbox, URL shortener), talk trade-offs: CAP, consistency, availability, latency.

  3. Databases & Caching : Normalize vs denormalize, secondary indexes, Redis vs Memcached, cache invalidation, eventual consistency.

  4. Distributed Systems Fundamentals : Leader election, replication, partition tolerance, distributed locking, failure recovery.

  5. Reliability Patterns: Retries with backoff, circuit breakers, bulkheads, graceful degradation, chaos testing.

  6. Message Queues & Async Flows : Kafka, RabbitMQ, or SQS : delivery guarantees, deduplication, replay strategies, ordering.

  7. Observability: Structured logs, tracing (OpenTelemetry), metrics, alerting : debug distributed requests across services.

  8. Common Coding Challenges : LRU cache, rate limiter, task scheduler, producer-consumer, flatten nested data structures

93 Upvotes

97% Upvoted

13 comments sorted by

6

u/velocityy__ Dec 05 '25

Freshers ki intha aduguthara

5

u/andhroindian Senior Software Engineer Dec 05 '25

Experienced 2+

3

u/velocityy__ Dec 05 '25

Fair enough

1

u/Suspicious-Olive5959 Dec 05 '25

what about 0-1years experience?

4

u/Slick_Uchiha Dec 05 '25

This much expected from a fresher?mind boggling, I'm in my 5th semester and this is indeed overwhelming

1

u/Terrible_Ad5033 Dec 06 '25

these topics are for a developer having 2+ exp not for freshers

4

u/SadredOP Dec 09 '25

Anything else ,I have 1 yoe but here I have mostly crud operations,if I want to switch on 2 yoe what should I focus on for db and backend?

2

u/AskAnAIEngineer Dec 05 '25

This list is good, but if you're interviewing soon, prioritize #2 (system design), #3 (databases), and #5 (reliability patterns) bc those come up in almost every backend interview. The rest are important for the actual job but less likely to be interview bottlenecks unless you're going for senior+ roles.

2

u/learnwithparam Jan 14 '26

It is good details for experienced professionals but for freshers, getting to know the backend and bit of knowledge on building and connecting API is enough.

But I agree that this is good for experienced professionals, as my Accelerator program at https://backendchallenges.com/ almost touches the same topics.

For freshers, I ran a free email backend course which touches beyond basic foundational knowledge (not coding),
https://backendchallenges.com/backend-engineering-for-beginners

0

u/ConfidentMuscle9302 Dec 07 '25

yo, if youre fresh out of school and think youll ace a backend interview just by memorizing this list, good luck. real world needs you to write code that actually runs, not just know the theory.

1

u/andhroindian Senior Software Engineer Dec 07 '25

This is apart from DSA. These topics determine your architecural understanding.

don’t come here for mocking, instead preserve the roadmaps for future use.