SDE -III

Your experience or knowledge checks most of these boxes 

o Excellent programmer, preferably in Java – Intermediate (Collections, Polymorphism, Design Patterns) to 

Expert level (Annotations, Lambda, Streaming, Concurrency) 

o Good knowledge of data structures and algorithms – if methods you write are in traffic request path, you 

know how to avoid unacceptable time complexity 

o Thorough knowledge of REST Framework like Spring Boot (or Lagom), REST Maturity Levels, good and bad 

practices of REST 

o Where to use non-REST frameworks like gRPC over Thrift or Protobuf 

o Nuances of TCP, UDP, HTTP, HTTP2, SSL 

o Thorough understanding of designing distributed systems without single point of failures that self-heal and 

stay responsive during failures 

o How to stop cascading failures by implementing fallbacks, graceful degradation, back pressure, circuit 

breaker, request collapsing/caching, adaptive concurrency limits – Hystrix, Resilience4J 

o Choosing the right data store for the given requirements – Relational, Graph, Object, Document, Columnar, 

Key-Value. We use Oracle, MySQL, Mongo, Cassandra 

o Usage of mid-tier caches – define the right keys, how to partition them, setting TTLs. We use Redis, 

Memcache, EHCache, Hazelcast, Aerospike. 

o Load Balancing and Adaptive Routing across nodes 

o Implementing distributed paradigms like tune-able eventual consistency, CQRS, Event sourcing 

o Understanding the implications of asynchronous communication and non-blocking IO 

o Nuances of using different servers – embedded vs standalone, Tomcat, Undertow, Netty, Jetty 

o Designing systems for achieving low latency, low error rate and high throughput 

o X, Y, Z cubes of scaling – by cloning, sharding and breaking into microservices. Applying the right trade-offs 

using CAP (Consistency, Availability and tolerance to network Partition) 

o Compliance to 12-factor app and solid understanding of different layers in the services stack – Load Balancer, 

API Gateway, Service Discovery, Central Config Management, Feature toggle, etc. 

o Understanding of Data Streaming and Messaging frameworks like Apache Spark, Storm, Flink, Kafka 

Your Qualities as an Engineer 

o You are a champion at Code reviews and Unit/Mock/integration Tests 

o You have a strong sense of ownership of what you design and deploy 

o You provide strong technical mentorship to team members 

o You are an excellent team player 

o You continuously learn and improve