Back End Developer

About GrayQuest

Senior Backend Developer

Key Responsibilities

• Design, develop and maintain scalable backend services using

  Python (Django, FastAPI)

  and

  Go

  .
• Architect and implement high-performance

  RESTful APIs

  and

  microservices

  supporting lending products, customer journeys and third-party integrations.
• Build and optimize

  event-driven systems

  using

  Kafka

  (Pub/Sub, streaming, task orchestration).
• Work with

  Airflow

  to orchestrate workflows, schedule jobs and automate complex data pipelines.
• Design efficient database schemas and write optimized queries across

  PostgreSQL, MySQL and MongoDB

  .
• Lead technical discussions, ensure code quality through reviews and mentor junior developers.
• Collaborate with product managers, frontend engineers, QA and cross-functional teams to deliver impactful features.
• Implement secure, compliant and production-ready systems aligned with fintech regulatory standards.
• Containerize services using

  Docker

  and contribute to microservices deployment workflows.
• Troubleshoot and resolve production issues, ensuring uptime, performance and reliability.
• Drive continuous improvements in backend architecture, observability, documentation, and engineering processes.
• Stay current with emerging technologies and bring fresh ideas to strengthen our tech stack.

Requirements

• 3 - 8 years of backend development experience working in both

  product-based

  and

  service-based

  organizations, with exposure to building scalable platforms and handling diverse client or integration requirements
• Strong command over

  Python, Django/FastAPI

  .
• Proven experience designing and scaling

  RESTful APIs

  and distributed microservices.
• Hands-on experience with

  Kafka

  or similar message queues for event-driven architectures.
• Strong proficiency in

  database design, SQL performance tuning

  and working with relational + NoSQL systems.
• Solid understanding of

  system design

  , distributed systems, caching and architectural patterns.
• Experience with Git, CI/CD pipelines (GitHub Actions/GitLab/Jenkins) and modern deployment practices.
• Demonstrated ability to use

  AI tools

  (ChatGPT, GitHub Copilot, Claude Code etc.) to enhance productivity.
• Strong debugging skills and experience handling production incidents.
• Excellent communication skills and ability to work collaboratively with diverse teams.
• Strong problem-solving mindset with ownership and a drive for technical excellence.
• Familiarity with

  monitoring and observability

  tools — Prometheus, Grafana, ELK Stack, Loki/Promtail, OpenTelemetry.

Nice-to-Have / Add-Ons

• Knowledge of

  payment gateway integrations

  , secure financial APIs and fintech compliance workflows.
• Experience with

  test automation frameworks

  (PyTest, UnitTest, Behave) and writing integration/E2E tests.
• Understanding of API gateway patterns, rate limiting, throttling and authentication standards (OAuth2, JWT).
• Experience building developer tooling, internal frameworks or reusable libraries.

What We Offer

• Opportunity to work on high-impact fintech problems using modern, scalable technologies.
• A collaborative culture that encourages ownership, innovation and continuous learning
• Direct contribution to building India’s digital lending backbone.
• Professional growth, upskilling opportunities and exposure to advanced engineering systems.
• Hybrid work model.
• Competitive compensation and benefits.