Software Engineer

30 Sundays; Gurugram District; On-site; INR 1,500,000 - 2,800,000; Full time

Benefits offered by this job

Travel credits

Job summary

30 Sundays is building a consumer-first travel platform. We are hiring a Software Development Engineer to own core backend systems end-to-end, writing production-grade code, and raising the engineering bar across the team.

You will design and build a high-performance backend for travel discovery and booking, with a mobile-first approach and data-driven features that scale to millions of users.

Qualifications

• 3–6 years backend development with production systems
• Deep Node.js expertise for high-traffic services
• Strong REST API design, authentication, and server-side architecture
• Proficiency in SQL and NoSQL data modelling, migrations, and optimization

Responsibilities

• Build, maintain, and scale backend services and REST APIs for the consumer app and internal platforms.
• Design secure, high-performance server-side logic using Node.js as the primary stack.
• Own data modelling, schema migrations, and query optimization across SQL and NoSQL databases.
• Collaborate with product, frontend, and internal teams to translate business requirements into robust backend solutions.

Skills

Node.js

REST APIs

SQL

NoSQL

Cloud platforms

Git

Testing

CI/CD

Express.js

System design

Education

B.Tech / B.E. IITs/Top institutes

Tools

MongoDB

Redis

Elasticsearch

AWS

GCP

CircleCI

GitHub Actions

Express.js

Jest

Mocha

Job description

30 Sundays is a modern holiday company helping Indians plan and book international trips with high-quality itineraries, great stays, and seamless on-trip support. Founded by IIT-IIM and ex-Apple leaders, with a core team from Flipkart, Spinny, and OYO, and backed by leading investors including Info Edge and Eximius.

We are building a consumer-first travel platform that transforms how people discover, plan, and book holidays - and we're growing fast.

Role Summary

We are looking for a Software Development Engineer to join our core engineering team. You will be an individual contributor owning critical systems and features end-to-end - writing production-grade code, driving technical design, and raising the engineering bar across the team.

This role is ideal for someone who is deeply hands-on, thrives on hard technical problems, and wants to build consumer internet products at scale from the ground up.

What You'll Build

Consumer Travel App Build and scale a best-in-class travel discovery and booking experience for Indian travellers, focusing on speed, usability, and personalization. Design and implement features that move beyond traditional booking interfaces and deliver a modern, intuitive holiday-planning experience.

Key Technical Areas

• Travel Discovery: Design and build engaging discovery surfaces - destination feeds, curated collections, search, and filtering.
• AI & Personalization: Implement recommendation engines and ranking systems that adapt to user preferences and browsing behaviour.
• High-Performance Platform: Architect and maintain a fast, reliable, mobile-first backend capable of supporting 20Mn+ DAUs.
• Data-Driven Product: Instrument features with analytics, run experiments (A/B tests), and iterate rapidly based on user insights.
• Internal Tooling: Build internal platforms and ops tooling that help the business operate efficiently at scale.

Key Responsibilities

• Build, maintain, and scale backend services and REST APIs for the consumer app and internal platforms.
• Design secure, high-performance server-side logic using Node.js as the primary stack.
• Own data modelling, schema migrations, and query optimization across SQL and NoSQL databases.
• Write clean, modular, well-tested backend code and maintain high standards through code reviews.
• Debug production issues, resolve performance bottlenecks, and ensure smooth deployments.
• Integrate third-party APIs, data pipelines, and background processes to support both product and internal operations.
• Collaborate with product, frontend, and internal teams to translate business requirements into robust backend solutions.
• Define backend architecture patterns and best practices that scale across the engineering team.

Core Backend

• API Layer: REST APIs, Express.js / Fastify

Databases

• NoSQL: MongoDB / Redis - caching, session storage, real-time data
• Search: Elasticsearch - for destination and itinerary discovery

Infrastructure & DevOps

• Cloud: AWS (EC2, S3, RDS, Lambda) / GCP
• CI/CD: GitHub Actions / CircleCI
• Background Jobs: Cron-based workers, event-driven pipelines
• Third-party Integrations: Payment gateways, travel APIs, CRM and ops tools
• Version Control: Git, GitHub
• Code Quality: ESLint, Prettier, unit and integration testing (Jest / Mocha)
• CLI & Scripting: Bash, Python scripts for automation

What We're Looking For

Must Have

• 3-6 years of backend development experience (excluding internships), with a strong track record of shipping production systems.
• Deep expertise in Node.js - you've used it to build and scale real, high-traffic services.
• Strong experience designing and building REST APIs, authentication systems, and server-side architecture.
• Proficiency in both SQL and NoSQL databases - data modelling, indexing, migrations, and query optimization.
• Experience owning production systems end-to-end, including monitoring, debugging, and incident response.
• Familiarity with Git, CLI tooling, and rigorous code review practices.
• Prior experience at a consumer internet startup is strongly preferred.

Good to Have

• Working knowledge of Python for scripting, automation, or data pipelines.
• Experience with cloud platforms - AWS, GCP, or Azure.
• Exposure to background job systems, event-driven architectures, or message queues (e.g. SQS, Kafka, Bull).
• Experience building internal tooling or admin systems in addition to consumer-facing products.

Preferred Education

B.Tech / B.E. from IITs, top NITs, BITS Pilani, or equivalent strong engineering institutions. We value demonstrated ability and impact over pedigree.

Why Join 30 Sundays

• Greenfield problem space - build systems from scratch; your architecture decisions will shape millions of trips.
• Technical depth + product impact - write code that directly moves key product metrics with no layers between you and the outcome.
• Backed by top investors - Info Edge and Eximius backing with a clear path to scale.
• Travel as a perk - experience the product you build; annual travel credits included.