RUST API Developer

Pouring Pounds India Pvt. Ltd.; Chennai; Hybrid; INR 1,200,000 - 2,400,000; Full time

Job summary

CashKaro is seeking a skilled Rust API Developer with 3+ years of API development experience to build scalable, fast, and reliable backend services. You will collaborate with cross-functional teams to deliver robust API solutions that power CashKaro and EarnKaro platforms.

The role focuses on developing RESTful APIs in Rust, ensuring security, performance, and scalability, while embracing CI/CD workflows and modern tooling.

Qualifications

• Proficiency in Rust programming with RESTful APIs.
• Strong knowledge of Actix or Rocket frameworks.
• Experience with async programming and Rust ownership model.
• Experience building high-performance, large-scale applications.
• Deep understanding of Rust performance optimization and memory management.

Responsibilities

• Develop and maintain backend APIs using Rust, ensuring performance, security, and scalability.
• Collaborate with frontend, product, and DevOps teams to build integrated systems.
• Write clean, modular, well-tested code following industry best practices.
• Design efficient data structures and algorithms to support API development.
• Debug, troubleshoot, and resolve performance issues for fast response times.
• Stay updated on Rust best practices and bring innovative approaches.

Skills

Rust programming

API security

Data structures & algorithms

Concurrency & async Rust

High-performance apps

Coding standards

Continuous learning

Tools

Actix

Rocket

Job description

Company Overview:

CashKaro is India’s #1 cashback platform, trusted by over 25 million users! We drive more sales for Amazon, Flipkart, Myntra, and Ajio than any other paid channel, including Google and Meta. Backed by legendary investor Ratan Tata and a recent $16 million boost from Affle, we’re on a rocket ship journey—already surpassing ₹300 crore in revenue and racing towards ₹500 crore.

EarnKaro, our influencer referral platform, is trusted by over 500,000 influencers and sends more traffic to leading online retailers than any other platform. Whether it’s micro-influencers or top-tier creators, they choose EarnKaro to monetize their networks.

BankKaro, our latest venture, is rapidly becoming India’s go-to FinTech aggregator, similar to Paisabazaar.

Join our dynamic team and help shape the future of online shopping, influencer marketing, and financial technology in India!

Role Overview:

We are looking for a highly skilled Rust API Developer with at least 3 years of experience in developing and maintaining APIs using Rust. The ideal candidate will play a critical role in building scalable, fast, and reliable API solutions to support the growing infrastructure of CashKaro & EarnKaro.

Key Responsibilities:

• Develop and maintain backend APIs using Rust, ensuring performance, security, and scalability.

• Collaborate with frontend, product, and DevOps teams to build efficient systems that integrate seamlessly with other platforms.

• Write clean, modular, and well-tested code that follows industry best practices.

• Design efficient data structures and algorithms to support API development.

• Debug, troubleshoot, and resolve performance issues, ensuring fast response times and availability.

• Stay updated on Rust best practices and bring innovative approaches to solve complex backend challenges.

• Document API features and ensure they are well-communicated to internal teams and external partners.

Must-Have Skills:

1. Proficiency in Rust Programming

   • Strong skills in developing RESTful APIs and experience with Actix or Rocket frameworks.

   • Mandatory expertise in the Actix or Rocket framework.

   • Experience with async programming and Rust’s ownership model to manage concurrency.

   • Should be working on high-performance and large scale applications.

   • Deep understanding of Rust, including performance optimization techniques, with an excellent grasp of memory management

2. API Security Best Practices:

   • Should have a strong understanding of OAuth2 and JWT and how to implement the same when building APIs

   • Should be able to talk about role based access control

   • Should have a strong understanding on input validation to prevent SQL injection, XSS etc

   • Rate limiting and throttling. Should be able to demonstrate these in their current work also.

3. Database Integration

   • Experience with integrating databases (SQL or NoSQL) into API systems.

4. Version Control & Team Collaboration

   • Familiarity with Git and collaboration in a team environment using CI/CD pipelines..

5. Strict adherence to Coding Standards

   • Should have a strong process for adherence to coding standards.

6. Commitment to Continuous Learning:

   • Should be constantly learning and keeping up with new technologies