Backend Developer(Nodejs)

Job Title: Lead Backend Engineer

Company: DoubleTick.io (Conversational CRM powered by Meta WhatsApp's API)

Location: Mumbai (on-site)

About the Role

We're looking for a hands-on QA leader to own quality across our products. You'll set the QA strategy, build and scale our automation and testing infrastructure, and lead a growing team — while staying close enough to the work to dig into a tricky bug yourself. This is a high-ownership role for someone who wants to define how quality is done, not just execute test cases.

Key Responsibilities

• Lead and mentor a team of 5-6 backend engineers, ensuring high-quality code delivery, adherence to best practices, and timely project completion.
• Hands-on development using TypeScript, Node.Js, and NestJs to build robust and scalable backend systems.
• Proficient in managing databases PostgreSQL and MongoDB. Implement efficient data storage and retrieval strategies.
• Expertise in Elasticsearch
• Work with Neptune and Gremlin to handle complex data structures and relationships.
• Conduct code reviews, enforce coding standards, and maintain high-quality software.
• Work closely with frontend teams, designers, and product managers to ensure seamless integration and alignment with business goals.
• Plan, track, and report on project progress. Manage resources effectively to meet deadlines.

Required Skills and Qualifications

• Bachelor’s degree in Computer Science or related field.
• Minimum 5 years of experience in backend development.
• Strong proficiency in Node.Js, PostgreSQL and JavaScript
• Strong experience in architecture and database design.
• Proven experience leading a team of engineers.
• Excellent problem-solving skills and attention to detail.
• Proven experience in scaling backend.
• Strong communication and collaboration skills.
• Experience in a fast-paced, agile environment.
• Prior experience in a similar lead role.

Good to have

• Experience with Gremlin, Neptune, MongoDB, Elasticsearch, TypeScript, and BigQuery
• Familiarity with AWS and its cloud-based services

What We Offer

• Competitive salary and benefits package.
• A dynamic and inclusive work environment.
• Opportunities for professional growth and development.
• A chance to work on cutting-edge technologies.

About Us:

DoubleTick is a mobile-first conversational CRM built on the official WhatsApp Business API, designed to unlock WhatsApp-led sales, marketing, and customer engagement at scale.It enables businesses to manage conversations through a centralized team inbox, automate workflows with chatbots and bot studio, and drive growth via bulk broadcasting and analytics. With features like WhatsApp Calling, commerce & cataloging, and role-based access, DoubleTick helps teams streamline operations and improve conversion efficiency.

Backed by Info Edge Ventures and BeeNext, the platform serves 10,000+ businesses across India and UAE in 100+ industries. Leading brands such as MakeMyTrip, Royal Enfield, CoinDCX, Tarun Tahiliani, Times Media, GRT Jewellers, Malabar Gold and Diamonds, Jaro Education, Sabyasachi, and DarGlobal trust DoubleTick to power their customer conversations. 

A SaaS startup founded in April 2020.

What’s the opportunity?

Are you a backend developer looking to fast-track your learning and growth? Have you looked at world-class products like Asana, Notion, or Airtable, and felt “I wish I were part of the early team that built these products”?

We’re a team that has previously built and rolled out globally successful SaaS products used by tens of thousands of customers.

We’re laser-focused on delivering a world-class product again, and looking for an ambitious backend engineer to join our existing team of 9 engineers.

If it excites you to think of a fast-paced start-up environment, building something big from scratch, breaking down new problems, creating new APIs, working on performance issues, getting hands-on with DevOps initiatives, and showcasing demos of your work every Friday with a happy and passionate team, then this is the right opportunity for you.

Some of the tech problems you get to work on as a backend engineer would be to build the backend for a modern spreadsheet experience from scratch, work on infra as code, write robust code that is fault-tolerant, work on performant code that adheres to SLOs set by the organization. 

About you:

● 3- 5 years of experience

● Expertise in the following areas ○ Java ○ HTTP Protocol

● You’ve heard of or worked with some of the following tech stacks/products

○ Spring

○ PostgreSQL

○ Redis ○ Docker

○ Message brokers

○ GitHub

● These non-functional areas are familiar to you

○ Performance

○ Debugging

○ Log management

Nice to have:

● Familiarity with AWS 

What’s in it for you?

● Great opportunity: We genuinely care about everyone we hire. You’ll learn new things and grow no matter how experienced you are; you will be working with founders who have more than three decades of collective experience in building significant B2B SaaS startups.

● Great team: Work with a world-class, high-velocity team that truly embodies the values of empathy, curiosity, and customer-centricity. Check out the MTT(Meet The Team) videos on our LinkedIn.

● Great culture: An open, fun, and exciting startup culture that empowers its people to champion big problems with the freedom to think and innovate.

● Growth: You could easily and quickly transition into other roles you might like.

● Impact: You get to be part of a global, passionate team in a fast-paced and growth-oriented environment. The team has a work philosophy of being high on ambition, ownership, and a bias for action.

● Monetary rewards and benefits: Competitive stipend, flexible leave policy, and more

What you will be doing

● Building and maintaining micro services.

● Develop new features and improve existing features of the application.

● Coding, Implementing, Unit Testing and Documenting Typescript and Javascript based services.

● Design, build, and maintain efficient, reusable, and reliable code.

● Code reviews and ensuring adherence to software development standards.

● Contribute to team and organizational improvements in process and infrastructure.

● Participating in requirements gathering and functional specification activities.

● Resolving and helping to mitigate production issues.

Requirements:

• Should be a go-getter, ready to shoulder more responsibilities, shows enthusiasm and interest in work.
• Excellent core Python skills including threading, dictionary, OOPS Concept, Data structure, Web service.
• Should have work experience on following stacks/libraries: Flask
• Familiarity with some ORM (Object Relational Mapper) libraries
• Able to integrate multiple data sources and databases into one system
• Understanding of the threading limitations of Python, and multi-process architecture Familiarity with event-driven programming in Python
• Basic understanding of front-end technologies, such as Angular, JavaScript, HTML5 and CSS3
• Writing reusable, testable, and efficient code
• Design and implementation of low-latency, high-availability, and performant applications
• Understanding of accessibility and security compliance

Experience in both RDBMS(MySQL), NoSQL databases (MongoDB, HDFS, HIVE etc) or in-memory caching technologies such as ehcache etc is preferable

• Developing and maintaining all server-side network components.
• Ensuring optimal performance of the central database and responsiveness to front-end requests.
• Collaborating with front-end developers on the integration of elements.
• Designing customer-facing UI and back-end services for various business processes.
• Developing high-performance applications by writing testable, reusable, and efficient code.
• Implementing effective security protocols, data protection measures, and storage solutions.
• Running diagnostic tests, repairing defects, and providing technical support.
• Documenting Node.js processes, including database schemas, as well as preparing reports.
• Recommending and implementing improvements to processes and technologies.
• Keeping informed of advancements in the field of Node.js development.

Strong proficiency with one of the Vue.js, Angular JS, React JS JavaScript Techologies
2. Knowledge of Node.js and frameworks available for it , such as Express JS, Strong Loop, etc
3. Understanding the nature of asynchronous programming and Promises and its quirks and workarounds
4. Good understanding of server-side templating languages (such as Jade, EJS, etc depending on your technology stack)
5. Good understanding of server-side CSS pre-processors such as Styles, Less
6. Basic understanding of front-end technologies, such as HTML5, CSS3, and Bootstrap
7. Understanding accessibility and security compliance
8. User authentication and authorization between multiple systems(Internal or Third party), servers, and environments
9. Integration of multiple data sources and databases into one system
10. Understanding fundamental design principles behind a scalable application
11. Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform
12. Implementing automated testing platforms and unit tests
13. Proficient in code versioning tools, such as Git or TFS

Desired candidates must have 3-6 years of experience as NodeJs Developers.

If the candidate cannot relocate to Gurgaon, we can also provide permanent Work from home for this position.

Roles and responsibilities:

• Responsible for understanding functional and business requirements and translate them into effective code
• Provide support till deployment of code into production.
• Ownership for ensuring code optimization, problem diagnosis, and on-time delivery
• Implement solutions as per the pre-defined framework /guidelines and adherence to processes
• Finding an optimal solution for the problem statement
• Conduct peer code review.

What candidate should know about:

• Excellent hands-on experience with Node.Js, Express.Js, JavaScript
• Understanding the nature of asynchronous programming and its quirks and workarounds
• Excellent hands-on experience with MongoDB, Mongo aggregation, MySQL
• Ability to build REST services, Authentications, MVC applications
• Excellent Object Oriented Programming skills and ability to write modular, secure, scalable, and maintainable code
• Experience with Elastic Search, Redis.
• Knowledge about AWS components (S3, EC2, Cloudfront, Redis Clusters, etc.)
• Self-learning abilities are required
• Familiarity with upcoming new technologies is a strong plus