We’re looking for strong Backend Engineers who enjoys building resilient, scalable systems and is comfortable working close to infrastructure and integrations. You’ll work on core platform services that handle supplier orchestration, bookings, payments, and data pipelines.

You’ll be expected to design, build, and own services end-to-end.

Core Tech Stack:

Language: Java/Kotlin
Framework: Spring Boot
Datastores: MongoDB/Mysql, Redis, Elasticsearch
Messaging & Streaming: Kafka (Confluent)
Infra: AWS (ECS/EKS, EC2, S3, IAM, VPC)
Architecture: Microservices, event-driven, workflow-oriented
Auth: Token-based systems, IAM-backed service auth

Key Responsibilities

1. Backend & API Development

Build high-performance APIs using Java/Kotlin + Spring Boot.
Design clean, versioned, backward-compatible APIs for partners and internal SDKs.
Implement secure authentication, authorization, and multi-tenant access control.
Own service-level SLAs, error handling, retries, and idempotency.

2. Distributed Systems & Orchestration

Design systems that interact with multiple external suppliers and clients.
Build orchestration flows for bookings, cancellations, refunds, and retries.
Implement asynchronous, event-driven workflows using Kafka.
Handle partial failures, timeouts, and consistency trade-offs.

3. Data & Storage

Model and manage data in MongoDB for scale and flexibility.
Use Redis for caching, rate-limiting, and performance-critical paths.
Leverage Elasticsearch for search, indexing, and analytics-driven use cases.
Ensure data isolation and correctness in a multi-tenant environment.

4. Reliability, Performance & Observability

Design systems for high availability and horizontal scalability.
Implement logging, metrics, and tracing for production systems.
Profile and optimize latency-sensitive paths.
Participate in on-call rotations and production incident resolution.

5. Security & Compliance (Built-in)

Follow secure coding practices and work closely with security engineers.
Ensure encryption in transit and at rest.
Build systems that meet enterprise and compliance expectations from day one.

Required Skills & Experience

Strong hands-on experience with Java/Kotlin and Spring Boot (non-negotiable).
Solid understanding of distributed systems fundamentals.
Experience with MongoDB and schema design at scale.
Working knowledge of Kafka and event-driven architectures.
Experience building production systems on AWS.
Comfort working with APIs, third-party integrations, and failure-prone systems.

Name *

Email *

Contact Number *

LinkedIn profile *

Years of Experience *

Notice Period (in days) *

Current CTC *

Expected CTC *

Resume/CV Link *

Links (GitHub, LinkedIn, Portfolio) *

In Spring Boot, which annotation is used to mark a class as a REST controller? *

@Service

@RestController

@Entity

@Repository

In MongoDB, how do you ensure fast lookup of bookings by user_id? *

Store user_id as a string always

Create an index on user_id

Use a separate collection per user

MongoDB is always fast, no action needed

What is the output of the following Java code? class Parent { public void display() { System.out.println("Parent"); } } class Child extends Parent { void display() { System.out.println("Child"); } } *

Prints "Child"

Prints "Parent"

Compilation error

Runtime error

A REST API should return flight details by ID. Which HTTP method is correct? *

POST /flights/{id}

GET /flights/{id}

DELETE /flights/{id}

PUT /flights

Which status code should an API return when a resource is not found? *

200

500

404

201

A user calls /book-hotel API. Payment succeeds but database insert fails. What should your code do? *

Write pseudocode: API receives a list of hotel IDs. Return only hotels with available_rooms > 0 from MongoDB. *

Describe a situation where you have to choose between shipping fast vs. building it right. What did you decide and why? *

Tell me about a feature or system you owned completely from ideation to delivery. How did you decide what to build? *

If you have any additional comments, stories, or context you would like to share, please do so here. *

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Backend Engineer (SDE-1) Hiring Form

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