
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.

About Convosight
About
Connect with the team
Similar jobs
📢 We’re Hiring: MEAN Stack Developer
Shift Timing: 10:00 AM – 7:00 PM
Location: Kolkata | Work Mode: Office | Immediate Joiner Preferred
We are looking for an experienced MEAN Stack Developer with strong knowledge of MongoDB, Express.js, Angular, and Node.js to join our dynamic development team.
Requirements:
- Minimum 4 years of experience in MEAN Stack Development.
- Strong proficiency in Node.js and Angular.
- Hands-on experience with MongoDB, Express.js, and RESTful APIs.
- Knowledge of Git or similar version control tools.
- Strong problem-solving and teamwork skills.
- Immediate joiner preferred.
Python Backend Developer (5+ years experience)
We are seeking an experienced Python Backend Developer with at least 5 years of hands-on experience in Python and Django development. The ideal candidate will have a strong background in MySQL and MongoDB databases, as well as knowledge of HTML, CSS, JavaScript frameworks, and cloud technologies like AWS, Azure or Google Cloud.Key Responsibilities:
- Design and develop scalable, high-performance Python applications using the Django framework
- Write clean, maintainable, and well-documented code
- Optimize database queries and schema design for improved performance
- Integrate applications with various APIs and third-party services
- Collaborate with cross-functional teams to gather requirements and deliver solutions
- Participate in code reviews, testing, and deployment processes
- Continuously learn and stay updated with the latest technologies and best practices
Required Skills and Experience:
- Bachelor's or Master's degree in Computer Science, Information Technology or a related field
- 5+ years of professional experience in Python and Django development
- Proficient in MySQL and MongoDB databases, with the ability to write complex queries and optimize database performance
- Hands-on experience with HTML, CSS, and at least one JavaScript framework (e.g., React, Angular, Vue.js)
- Knowledge of cloud technologies like AWS, Azure, or Google Cloud is preferred
- Strong problem-solving and algorithmic skills
- Excellent communication and teamwork skills
- Passion for continuous learning and innovation
Preferred Qualifications:
- Experience in developing and deploying applications on cloud platforms
- Knowledge of containerization technologies like Docker and Kubernetes added advantages
About Company:
Fusion Softtech is one of the best offshore development companies based in Ahmedabad, India. We are a bunch of tech-savvy individuals who together as a teamwork to have great expertise in the latest technologies and developments so as to be able to cater the best of the services in the domain of Technology.
We, ensure being the hard core Technoids that our clients around the globe are given the best of our facilities through advancements in technologies which would actually help to make their lives a better place. What we do? We are specialized in creating user-friendly web-designs and applications with a primary goal to be simple and effective for use. We work hand-in-hand with your visions and goals to optimize your business/product. We provide you an end-to-end solution.
Job Description:
- Lead a team, handle client, conduct technical interview, and provide training to new joiners.
- Design, implement, and maintain web application phases.
- Conduct software analysis, programming, testing, and debugging
- Identifying production and non-production application issues
- Transforming requirements into stipulations.
- Should have knowledge of Data structures
- Develop, test, implement and maintain application software
- Recommend changes to improve established software application processes
- Ability to develop logical and high-quality code which meets functional specifications along with technical requirements for reusability, maintainability and scalability when appropriate application code for java programs.
- Ability to perform technical analysis based on requirements to establish architecture approach and create detailed design in support of the requirements.
- Excellent written and verbal communication skills, worked for foreign client would be an added advantage.
Technical Skills:
OOPS, Java, J2EE, Spring MVC, Spring Boot , Spring security and Spring Batch SOAP, REST API, Logging Framework, Hibernate, XML, JEE (Servlets/JSP/JMS), web services experience, microservices, AWS, Kubernetes, ELK Stack, Multithreading, GIT
Key Skills and Experience:
- Min 5+ years of experience in the JAVA/J2EE.
- Experience with RESTFUL Web services.
- Experience in portal & web content management
- Hands-on experience on Javascript frameworks Alloy UI and JQuery.
- Hands-on experience in software development using J2EE Frameworks Spring, Spring Boot, Struts, Hibernate.
- Basic knowledge of Javascript, HTML5, and CSS3.
- Good to have experience or Knowledge in AngularJS, ReactJS, different AWS services like S3, EC2, DynamoDB, Lambda function.
- Exposure in any of the Databases -MySQL/Postgres/Oracle/DB2 etc.
Perks and Benefits:
- Flexible working hours.
- 5 days working
- Fun loving environment with ample scope for flexibility.
- Exposure to work for foreign clients
- Employee friendly leave & Company Policies.
- Best working culture
Must have the capacity to work independently or in a team.
Contribute in all phases of the development lifecycle
Write well designed, testable, efficient code
Ensure designs are in compliance with specifications
Prepare and produce releases of software components
Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review
We are looking for a Java Developer with experience in building high-performing, scalable, enterprise-grade applications. . You'll be required to apply your depth of knowledge and expertise to all aspects of the software development lifecycle, as well as partner continuously with your many stakeholders daily to stay focused on common goals You will be part of a talented software team that works on mission-critical applications
Responsibility
- Write automated test cases to test code.
- Excellent teamwork skills with an ability to get the work done with minimal
- Experience with multiple mobile platforms is a plus.
- A passion and will to accept any new technical challenge that may come across.
- Linux scripting and SSH terminal
- Conceptual, Working knowledge of - DBMS, SQL, PL/SQL.
- Ability to write clean and documented code.
- A team player can provide technical expertise for a small team of developers.
- Strong hands-on and experience in core Java - Java/J2EE
- Design and implement new features, create UI, debugging, and data modeling.
- To update and sync with other team members daily.
- Ability to communicate effectively, both written and oral, at all levels to various technical and non-technical audiences
- Testing all applications against software and hardware versions. Provide timely turnaround and documentation of things implemented.
Additional preferred skills * JSP/Servlets OR JQuery/HTML5 AND JavaScript
Requirements:-
- Working knowledge of - MySQL.
- Working experience on Struts/Spring.
- Experience with web services standards and related technologies - SOAP/Rest, AJAX, JSON, and XML.
Your Responsibilities:
- Own the backend stack – Node.Js based, that powers our product
- Collaborate with Backend Developers (Python), Front-end developers, DevOps, and Data Scientists to design and implement new features
- Build and maintain several REST’ful Services/Endpoints which will be used both internally and externally in a Macroservices/Distributed services environment.
- Deploy and monitor the Services/Endpoints ensuring availability and scalability(ability to handle 100X traffic)
- Work on full project lifecycle starting from requirements gathering/understanding the problem to deploying and maintaining the project.
Skills that you bring Along:
- A minimum 8+ years of extensive work experience with Node.Js and related frameworks – particularly Express.Js.
- Extensive experience in designing and maintaining REST’ful API endpoints
- Extensive experience with databases such as Postgres and Mongo.
- Extensive experience in Cloud Infrastructure (AWS based) – e.g. AWS API Gateway, Lambda Functions etc.
- Experience with cache like Redis and/or Memory cache
- Good experience in Microservices/Macroservices or Event driven Architectures
- Good experience with design patterns
- Experience in writing advanced SQL-queries, good knowledge of PL/SQL
- Good understanding of Software Design Principles and domain-driven design
- Good experience with Continuous Delivery and Containerization(Docker)
- Ideally maintaining infrastructure-as-code using Terraform
- Excellent communication skills and the ability to explain complex topics in a simple manner
PHP / Laravel developer duties and responsibilities
- Develop, record and maintain cutting edge web-based PHP applications on portal plus premium service platforms
- Build innovative, state-of-the-art applications and collaborate with the User Experience (UX) team
- Ensure HTML, CSS, and shared JavaScript is valid and consistent across applications
- Prepare and maintain all applications utilizing standard development tools
- Utilize backend data services and contribute to increase existing data services API
- Lead the entire web application development life cycle right from concept stage to delivery and post launch support
- Convey effectively with all task progress, evaluations, suggestions, schedules along with technical and process issues
- Document the development process, architecture, and standard components
- Coordinate with co-developers and keeps project manager well informed of the status of development effort and serves as liaison between development staff and project manager
- Keep abreast of new trends and best practices in web development









