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Backend Developer

Zywa

Zywa

Software Engineering
Bengaluru, Karnataka, India · Bengaluru, Karnataka, India · Karnataka, India
Posted on May 25, 2025
About The Role

We are seeking a skilled and experienced Backend Developer with 4–6 years of hands-on experience in building robust, scalable, and fault-tolerant backend systems. The ideal candidate is proficient in modern backend technologies and architectures and is excited to work in a high-growth, dynamic startup environment. This role involves working with microservices, cloud infrastructure, and modern development practices including test-driven development.

Key Responsibilities

  • Design, develop, and maintain scalable microservices using Python, Go, or Node.js.
  • Build and maintain RESTful APIs to support web and mobile applications.
  • Develop event-driven and asynchronous systems using Apache Kafka.
  • Deploy and manage services using Kubernetes in AWS cloud environments.
  • Work with SQL and NoSQL databases to store and retrieve data efficiently.
  • Write clean, maintainable, and well-tested code following Test-Driven Development (TDD) practices.
  • Ensure systems are fault-tolerant, scalable, and performant under load.
  • Collaborate cross-functionally with frontend engineers, DevOps, and product teams.
  • Participate in code reviews, architecture discussions, and team ceremonies.
  • Continuously improve system design and development workflows.

Required Skills & Qualifications

  • 4–7 years of professional backend development experience.
  • Proficiency in Python, Go, or Node.js (at least one language required).
  • Strong understanding and hands-on experience with Microservices architecture.
  • Experience with Kafka or other messaging systems (e.g., RabbitMQ).
  • Solid understanding of both SQL (e.g., PostgreSQL, MySQL) and NoSQL (e.g., MongoDB, DynamoDB) databases.
  • Working experience with AWS services (e.g., EC2, S3, RDS, Lambda).
  • Hands-on experience with Kubernetes and containerized application deployment.
  • Proven experience in writing and maintaining RESTful APIs.
  • Commitment to Test-Driven Development (TDD) and clean coding practices.
  • Strong debugging, problem-solving, and analytical skills.
  • Ability to thrive in a fast-paced, dynamic startup environment.
  • Familiarity with observability and monitoring tools (e.g., Prometheus, Grafana, ELK Stack).

Nice to Have

  • Exposure to gRPC APIs.
  • Familiarity with Large Language Models (LLMs) and their integration into applications.
  • Experience with Voice Technologies, such as speech recognition, text-to-speech (TTS), conversational AI
  • Understanding of real-time streaming and event-driven systems.

Why CozmoX AI?

  • Work with cutting-edge technologies in a collaborative and innovative team.
  • High ownership, visibility, and impact on product development.
  • Opportunity to work on scalable systems from the ground up.

About Us

CozmoX AI is building the operating system for voice-native AI employees—autonomous agents that handle sales, support, collections, and more. Backed by Y Combinator and top-tier global investors, the company is scaling rapidly across markets.