Senior Node.js 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.

• Role & Responsibilities:
• Develop and maintain backend functionality for websites and web applications.
• Create custom WordPress themes and plugins based on requirements.
• Work with REST API integration and database management (MySQL).
• Follow MVC principles for structured code development.
• Collaborate with frontend developers to integrate designs and functionality.
• Use Git for version control.

Requirements

• Extensive and expert programming experience in at least one general programming language (e. g.

Java, C, C++) & tech stack to write maintainable, scalable, unit-tested code.

• Experience with multi-threading and concurrency programming.

• Extensive experience in object oriented design skills, knowledge of design patterns, and a huge passion

and ability to design intuitive modules and class-level interfaces.

• Excellent coding skills - should be able to convert design into code fluently.

• Knowledge of Test Driven Development.

• Good understanding of databases (e. g. MySQL) and NoSQL (e. g. HBase, Elasticsearch, Aerospike etc).

• Strong desire to solve complex and interesting real world problems.

• Experience with full life cycle development in any programming language on a Linux platform.

• Go-getter attitude that reflects in energy and intent behind assigned tasks.

• Worked in a startup-like environment with high levels of ownership and commitment.

• BTech, MTech or Ph. D. in Computer Science or related technical discipline (or equivalent).

• Experience in building highly scalable business applications, which involve implementing large complex

business flows and dealing with huge amounts of data.

• 3+ years of experience in the art of writing code and solving problems on a large scale.

• Open communicator who shares thoughts and opinions frequently, listens intently, and takes

constructive feedback.

Viha Technosoft - building tech products that matter to people

At Viha Technosoft, we’re a happy family of 50+ young and experienced talents. We work in Media and Entertainment (M&E)t, Healthcare, and Payments domains.

We’re looking for a competent individual to help develop a scalable backend system for our project Cast India.With Cast India, We’re out to revolutionize the way people onboard, train, and get opportunity in M&E domain.

• Must-Have Skills

  • Strong knowledge of any PHP web framework Codeigniter, Laravel, CakePHP, Yii, Symfony, etc along with strength in OOPS
  • Understanding of MVC design patterns
  • Working experience with any Payment Gateways is desirable. Experience with REST-based API Development is a must
  • Experience with front-end technologies, such as JavaScript, HTML5, and CSS frameworks along with Angular 6+ and ReactJS
  • Confident with Mysql database, framing complex queries for optimum performance
  • Good knowledge of Javascript, Json, Jquery, Ajax

  Additional Skills

  • Hands-on experience working on Microservices development
  • Integration of multiple data sources and databases into one system

  Build and hosting experience

  • Must have a strong DevOps experience
  • Exhibited CI/CD experience with Jenkins tools and plugins.
  • Strong experience in auto-deployment, deployment testing, and overall automated pipeline management.
  • Good to have knowledge of Cpanel, FileZilla, Docker, and Kubernetes
  • Must have a strong experience with source control tools like GitHub

  Testing

  • Must have strong advanced Unit testing experience and Agile experience
  • Must have strong working experience in agile
  • Must have participated in SCRUM and must be well aware of the scrum ceremonies
  • Must be able to self-manage the pipeline and should be well prepared to meet challenging timelines

  MySQL competency

  • Must be able to write complex queries
  • Understanding and implementation level knowledge of key joins, constraints, and triggers
  • Able to analyze the query and perform query optimization
  • Independently handle the Table DDL and DML statements as part of the development
  • Ability to create ER diagrams and data mapping diagrams and document data entity chang

• 2.5+ year of experience in Development in JAVA technology.
• Strong Java Basics
• SpringBoot or Spring MVC
• Hands on experience on Relationl Databases (SQL query or Hibernate) + Mongo (JSON parsing)
• Proficient in REST API development
• Messaging Queue (RabitMQ or Kafka)
• Microservices
• Any Caching Mechanism
• Good at problem solving

Good to Have Skills:

• 3+ years of experience in using Java/J2EE tech stacks
• Good understanding of data structures and algorithms.
• Excellent analytical and problem solving skills.
• Ability to work in a fast paced internet start-up environment.
• Experience in technical mentorship/coaching is highly desirable.
• Understanding of AI/ML algorithms is a plus.

Good to have:

API Integrations with UI Layer

What/Why/How is Floworks?

Floworks (https://floworks.ai">https://floworks.ai) builds powerful business process tools that simplify business operations for the largest of e-commerce and logistics companies in India.

Floworks was founded by distinguished alums from IIT and BIT, with exemplary backgrounds in business and technology.

Floworks has raised two rounds of funding within just 6 months of existence.We are funded by London based Startup Incubator, Entrepreneur First whose investors include the likes of PayPal Cofounder Peter Thiel and LinkedIn Cofounder Reid Hoffman.

https://en.m.wikipedia.org/wiki/Entrepreneur_First">https://en.m.wikipedia.org/wiki/Entrepreneur_First

Floworks in the press:

1. https://theprint.in/ani-press-releases/entrepreneur-first-announces-investment-in-six-indian-tech-start-ups/896694/

What will be your key responsibilities?

Although it’s an engineering role, you will have significant involvement in product, hiring and business as well. You may expect following key responsibilities:

Engineering: You’ll need to write code – a lot of code. At the end of the day, your most important responsibility is to get your company’s product to market and maximize the number of product experiments that can be run. You’ll make key architectural decisions that will be pillars of the engineering organization for years to come. At the same time, you’ll have to make serious trade-offs to balance speed of execution with quality.

Product: As a founding engineer, you’ll also have a significant amount of ownership over the product direction. You should expect to spend time talking to customers, teasing out use cases, and making prioritization decisions regarding both the short- and long-term roadmap. In many cases, you will be building features in the absence of any formal product requirement document.

Support: You should also expect to spend a fair amount of time in the trenches supporting customers. You’ll probably find yourself engaging with customers in shared Slack channels, WhatsApp groups etc.

Hiring: As a founding engineer, you will spend a ton of time sourcing, interviewing, and closing early team members. 

Business: Finally, you’ll gain exposure to all other aspects of the business – from fundraising, to sales, and beyond. Although you probably won’t be closing deals or making pitch decks, you will certainly be expected to sell your product and pitch the company’s vision.

How do you know you are right fit for the role?

• You have at least 2-4 years of experience. You are proficient with most of the following languages/frameworks:
• NodeJS
• AWS
• Databases (both SQL and NoSQL)
• You crave ownership. If you often find yourself raising your hand to own things end-to-end, you will likely really enjoy the ownership afforded to you as a founding engineer.
• You’re okay with ambiguity. You won’t get product requirement documents or designs for everything you’re expected to build. A stellar founding engineer will know when to ask for clarity and when to make educated assumptions. If you tend to gravitate towards more loosely scoped projects, that’s a good indicator that you’ll do well in this type of role.
• You’re multidisciplinary. A typical day might include anything from several hours of coding, to a few customer conversations, to a technical brainstorm or architecture discussion, to an interview or two. 

• You operate at light speed. A great founding engineer should welcome this challenge and thrive under the pressure of intense deadlines. 

What will be the hiring process?

• 2 round of technical interviews
• 2 round of behavioural interview

What will be your compensation?

• Fixed: INR 20L-30L
• Bonus: 10-30% of Fixed depending upon performance.

• Equity: 0.1%-0.2%