Back End Developer

About GrayQuest

GrayQuest is one of India’s fastest-growing fintech companies, focused on building secure and scalable digital lending infrastructure. We design innovative financial products and deliver end-to-end lending solutions used by thousands of institutions and customers. As we expand our technology ecosystem, we are looking for a skilled Senior Backend Developer to help drive our backend architecture, engineering practices and product scalability.

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.