Web Developer

Core AI Backend Engineer – LLM Fine-Tuning

You know that moment when you don’t just debug code — you train a model, fine-tune it, and suddenly it understands your domain better than you expected? That’s the kind of magic we’re looking for.

We’re building something that turns chaotic social video data into crystal-clear business intelligence. Not just another API — but AI-backed architecture fine-tuned to our world. Systems that marketing teams thank you for, because they feel the intelligence, not just the infrastructure.

Either you feel the craft when you read this, or you don’t. This isn’t just another backend role. This is where you bring together scalable systems and cutting-edge LLMs to build something the world hasn’t seen before.

Who We Are

We’re a small, global team that ships fast. Every line of code and every model choice affects millions of video analysis requests.

Our engineers don’t just build APIs — they architect solutions, they optimize at scale, and now, they fine-tune models to make AI work in the real world. Our CPTO still codes. Our senior engineers make complexity look effortless. Our backend team sets a standard that others ask how we move so fast.

What We Need

We need someone who’s lived both sides of this life:

• Backend excellence: building high-scale, high-performance systems.
• LLM fine-tuning: hands-on with open-source models, not just calling APIs.

Someone who can sit with a requirement at 2pm and by 6pm not only has endpoints working, but also has a fine-tuned model running behind them — customized to our use case.

Your Craft

• JavaScript/TypeScript & NodeJS as core backend tools.
• Next.js for full-stack where needed.
• Rust when performance is non-negotiable.
• Golang/Python as comfortable tools of choice.
• MySQL/Postgres/Redis — wielded with intention.
• AWS ecosystem — your playground, not your puzzle.
• LLM/AI integration you’ve actually shipped.
• Open-source LLM fine-tuning experience:
• Bringing in open-source models (LLaMA, Mistral, Falcon, etc.).
• Fine-tuning/adapting them for specific domains.
• Optimizing for inference cost, latency, and accuracy.

The Reality

The work is beautifully complex. The scale is real and growing. The problems are the kind that wake you up at 3am with solutions.

If you get your energy from building backend systems and adapting LLMs to make them smarter for real-world use, you’ll probably fall in love with what we do. If you’re only interested in APIs without touching models, this won’t be your thing — and that’s completely okay.

How to Apply

If you’re reading this thinking “finally, a team that actually cares about real AI engineering” — we’d love to see something you’ve built.

Not just a resume. Show us your craft:

• An LLM fine-tuning repo.
• A domain-adapted model you worked on.
• A system design where you combined backend and AI.
• Or even a short write-up or voice note explaining what you’ve fine-tuned.

We’re genuinely excited to see what you’ve done and have a meaningful conversation about whether this could be magic for both of us.

Job Title: Node.js Developer

Experience: 4+ Years

Salary: Up to ₹12 LPA

Joining: Immediate

Gender Preference: Male candidates only

Requirements:

• Minimum 4 years of hands-on experience in Node.js development.
• Strong understanding of JavaScript (ES6+), RESTful APIs, and asynchronous programming.
• Experience with databases like MongoDB, MySQL, or PostgreSQL.
• Familiarity with Git and version control workflows.
• Strong problem-solving skills and attention to detail.
• Excellent communication and interpersonal skills.
• Ability to work in a fast-paced, collaborative environment.

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.

Kutumb is the first and largest communities platform for Bharat. We are growing at an exponential trajectory. More than 1 Crore users use Kutumb to connect with their community. We are backed by world-class VCs and angel investors. We are growing and looking for exceptional Backend Developers to join our Engineering team.

More on this here - https://kutumbapp.com/why-join-us">https://kutumbapp.com/why-join-us.html

Core Responsibilities:

• Design and develop real-time, resillient and high availabilty systems
• Architect and Build Microservices
• Iterating and building experiments
• Will be working with Node.js, Go, MySQL and Redis

You are the right fit if you have:

• Strong systems, architecture and database fundamentals
• Build from scratch and be a good decision maker
• The Ownership skills and can own the problems end to end
• The Zeal and willingness to put in extra efforts to build a product which will be used by millions of users, and most importantly
• The ability to find the solution to any problem and get things done

What we offer:

• High pace of learning
• Opportunity to build the product from scratch
• High autonomy and ownership
• A great and ambitious team to work with
• Opportunity to work on something that really matters
• Top of the class market salary and meaningful ESOP ownership

• Participate in the entire application lifecycle, focusing on coding and debugging
• Write clean code to develop functional web applications
• Troubleshoot and debug applications
• Collaborate with Front-end developers to integrate user-facing elements with server-side logic
• Gather and address technical and design requirements
• Provide training and support to internal teams
• Build reusable code and libraries for future use
• Liaise with developers, designers to identify new features
• Follow emerging technologies

• Spent at least 1 yr in a solid back end role
• Experience taking a problem to a product solution (module/product)
• Prior experience working with startups and understanding the fast-paced, dynamic nature of work

• Javascript, NodeJS
• Client-server architecture
• OOP concepts, including design patterns
• Understanding of RDBMS (MySQL, Postgresql)
• Understanding of REST API
• Familiarity with frameworks such as ExpressJs

• Knowledge of TDD frameworks mocha, chai, jest, etc
• Knowledge of AWS (Lambda, RDS, EC2, SQS, S3, ECS, etc)
• Basic knowledge of Typescript, NextJs
• Prior experience in fin-tech

The ideal candidate is a highly resourceful and innovative developer with extensive experience in the layout, design and coding of websites specifically in PHP format. You must also possess a strong knowledge of web application development using PHP programming language and MySQL Server databases. 

Responsibilities

- Who can understand and demonstrate to maintain Data Quality in high volume data  systems.

- One who can understand and can deliver highly tested system

- Who can routines to test their own code using negative sql concepts.

- Who can use OOP concepts with same class being used everywhere.

- Knowledge in Angular.js and Laravel is mandatory

- College degree is not mandatory

- hike on last salary will be given

-Full time / Remote job

-Can share cv 

Thanks & Regards,

Annu