Purusottam Mohapatra Java 21, kafka, system design
No reviews yet

Senior Software Engineer with 6+ years of experience designing and scaling microservices
platforms for top startups and leading tech companies. Skilled in backend development using
Java 21+, with expertise in Kafka, MongoDB, Redis, Postgres, and Kubernetes, along with
hands-on experience in the Azure cloud platform. Recently led the development of an
AI-powered platform, integrating OpenAI LLM models with Pinecone to deliver intelligent
search and recommendation capabilities.

Proven record of architecting and delivering reliable, scalable, and high-performing solutions.
Involved in end-to-end coding implementation, HLD/LLD design, and applying SRE practices
in Azure to ensure system resilience.

Programming Languages: Java 21, Kotlin,
Data Structures & Algorithms
Core Competencies: Microservices
Architecture, Distributed Systems, System
Design (HLD/LLD)
Frameworks: Spring Boot 3, Spring Cloud
Databases: MongoDB, MySQL, Redis
(Cache & Search), Azure Cosmos DB
Messaging & Event Streaming: Apache
Kafka (Pub/Sub & Event Streaming)
Search Engine: Elasticsearch
Cloud Platforms: AWS, Microsoft Azure•\
DevOps & Tools: Docker, Kubernetes,
Linux, Git
Monitoring: Prometheus, New Relic
Data Processing & ETL: Azure Data
Factory (ADF)
AI & Machine Learning: OpenAI API &
Pinecone

Subjects

JavaScript Intermediate
Spring Boot Expert
Kafka Expert
Java 8 Expert
Cloud Expert

Experience

SDE 2 (Jan, 2024–Present) at Tesco Bangalore

Developed and maintained microservices for computer vision use cases, managing 45K+
cameras.
Implemented containerization and orchestration solutions using Docker and Kubernetes.•
Tech Stack: Java 17, Golang, Docker, k8s, Spring Boot.•

Education

B.tech (Aug, 2014–Aug, 2018) from ITER,Bhubaneswar–scored 8.14

Fee details

₹2,000–4,000/hour (US$21.05–42.10/hour)

Can teach System Design and DSA, Backend development with Java and spring boot.
I have worked with Top product based compnise like Paypal and Tesco.

Courses offered

System Design (HLD and LLD)
- US$9999
- Duration: 1 Month
- Delivery mode: Online
- Group size: Individual
- Instruction language: English
- Certificate provided: No
System Design Concepts**

1. **Scalability & Load Balancing**

* Vertical vs. horizontal scaling
* Load balancers (Layer 4 vs Layer 7, round robin, least connections, consistent hashing)

2. **Caching Strategies**

* Client-side, CDN, reverse proxy, in-memory caches (Redis, Memcached)
* Cache invalidation strategies (write-through, write-around, write-back, TTLs)

3. **Database Design**

* SQL vs. NoSQL
* Sharding, replication, partitioning
* CAP theorem and trade-offs

4. **Data Storage & Indexing**

* File storage vs. block/object storage
* Indexing techniques (B-tree, LSM trees, inverted indexes)
* Storage systems (S3, HDFS, blob stores)

5. **Message Queues & Streaming**

* Event-driven architecture
* Kafka, RabbitMQ, SQS, Pulsar
* Pub/Sub vs. Queue-based messaging

6. **Consistency & Availability**

* Strong vs. eventual consistency
* Quorum, consensus algorithms (Raft, Paxos, ZAB)
* Leader election

7. **API Design & Communication**

* REST vs. gRPC vs. GraphQL
* Rate limiting, throttling, API gateways
* Idempotency and retries

8. **Security & Authentication**

* OAuth, JWT, API keys
* TLS/HTTPS, encryption at rest vs. in transit
* Role-based access control (RBAC)

9. **Monitoring & Observability**

* Logging, tracing (OpenTelemetry, Jaeger, Zipkin)
* Metrics collection (Prometheus, Grafana)
* Health checks & alerting

10. **Fault Tolerance & High Availability**

* Failover mechanisms, replication, multi-AZ/region setups
* Circuit breakers, retries with exponential backoff
* Disaster recovery strategies (RPO, RTO)

---

👉 Bonus Concepts (once you master the top 10):

* Distributed transactions (2PC, Saga)
* Search systems (Elasticsearch, Solr, Lucene)
* Rate limiting & quota management
* Designing for cost efficiency in cloud