T24 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.

About Techjays

At Techjays, we build production-grade AI platforms for global clients. We operate at the intersection of backend engineering, distributed systems, and applied AI — delivering secure, scalable, and enterprise-ready intelligent systems. Our team has built and scaled products at Google, Akamai, NetApp, ADP, Cognizant, and Capgemini.

About the Role

This is not a feature-delivery role. We are looking for an AI Lead who can architect, own, and scale intelligent backend systems end-to-end. You will drive both technical direction and execution — working across LLM integrations, RAG pipelines, agentic AI workflows, and cloud-native backend systems for global clients.

What You'll Do

• Architect and scale backend systems powering AI-driven applications
• Design and implement RAG pipelines, AI agents, and LLM integrations
• Own systems end-to-end — from architecture to deployment and scaling
• Integrate and optimize LLMs (Claude, GPT, Gemini) for real-world production use cases
• Build high-performance distributed systems with observability and cost efficiency
• Lead backend and AI initiatives with strong technical ownership
• Mentor engineers and raise the technical bar across teams
• Collaborate with product and AI teams to deliver AI-native solutions

What We're Looking For

• 6–10 years of strong backend engineering experience
• Hands-on expertise in Python (FastAPI / Django / Flask)
• Deep understanding of Generative AI and LLM-based systems
• Strong experience with RAG pipelines and Vector Databases (Pinecone, FAISS, ChromaDB, Weaviate)
• Solid knowledge of Agentic AI — building autonomous agents and multi-agent workflows
• Proficiency in AWS or GCP in production environments
• Experience with distributed systems, microservices, and system design
• Strong grasp of Data Structures, Algorithms, and Design Patterns
• Familiarity with WebSockets, Git, Linux/Unix, and CI/CD

Nice to Have

• Experience with Anthropic Claude API and Claude Code
• Familiarity with real-time data systems or streaming (Kafka, etc.)
• MLOps and AI system lifecycle experience
• Optimizing AI systems for latency, cost, and scalability

Who You Are

• You think in systems, not just features
• You take full ownership of what you build
• You are comfortable navigating fast-moving, ambiguous environments
• You stay updated with the latest in Generative AI and backend technologies
• Strong communicator who can collaborate across teams and global clients

What We Offer

• Competitive compensation (Best in Industry)
• Work on production-grade AI systems used by global clients
• Exposure to cutting-edge AI tools and frameworks
• A culture that values clarity, integrity, and continuous growth

Software Languages: Advanced knowledge of JavaScript, C#, ASP.Net and SQL Server.

Job Responsibilities:

• Gain a clear understanding of customers' businesses and requirements;
• Plan execution methodology and identify fulfillment plan to address the requirements;
• Full lifecycle application development
• Designing, coding and debugging applications.
• Software analysis, code analysis, requirements analysis, software review, identification of code metrics, system risk analysis, software reliability analysis
• Support, maintain and document software functionality
• Programming analytical skill with highly logical and analytical approach
• Manage documentation by working with other teams and consolidating all required types of reports for future use and test case scenarios.
• Ability to visualize data, concepts and work flows to create diagrams, charts and illustrations to supplement documentation.
• Maintain quality service by establishing and enforcing organization standards.
• Maintain professional and technical knowledge by benchmarking state-of-the-art practices.
• Timely reporting to provide visibility of performance to goal.
• Be data driven and flexible to changes with a natural passion for problem solving.
• Maintain professional and technical knowledge by attending educational workshops; reviewing professional publications; establishing personal networks; participating in professional societies.

Key Skills required: 

• 4+ years of rich experience in the software development with advanced knowledge of JavaScript, C#, ASP.Net and SQL Server.
• A self-starter with the ability to work independently and as part of a team.
• Ability to work well in a results oriented environment with firm deadlines;
• Ability to perform multiple tasks effectively while being results-driven and patient
• Able to work both independently and as part of a team
• High degree of attention to detail and trustworthiness
• Strong analytical skills
• Capable of making timely, independent decisions
• Excellent oral, written and interpersonal communications skill
• Ability to think outside the box and generate and implement new ideas.
• Natural interest in team building and leadership with coaching/training skills.
• Excellent organizational skills

• Min 5 years of hands-on experience in Java Spring-boot technologies
• Experience with monolithic applications
• Experience using Redis and RabbitMQ
• Experience with RDBMS such as SQLServer and My SQL
• Strong analytical, problem solving and data analysis
• Excellent communication, presentation and interpersonal skills are a must
• Micro service frameworks such as Java SpringBoot
• Design and implement automated unit and integration tests 

Job Description:

• Knowledge on both back-end and front-end technology.
• An expertise in PHP, MySQL, HTML5 and CSS3 A portfolio with live links to sites that you have developed previously (preferred).
• Laravel experience (preferred).
• Education: BE, BTech, MCA, MSC, ME.
• Experience: 0 ~ 2-year Experience.

About Us

Zupee is India’s fastest growing innovator in real money gaming with a focus on predominant skill focused games. Started by 2 IIT-Kanpur alumni in 2018, we are backed by marquee global investors such as WestCap Group, Tomales Bay Capital, Matrix Partners, Falcon Edge, Orios Ventures and Smile Group.

Know more about our recent funding: https://bit.ly/3AHmSL3

Our focus has been on innovating in the board, strategy and casual games sub-genres. We innovate to ensure our games provide an intersection between skill and entertainment, enabling our users to earn while they play. We are at the cusp of scaling rapidly; we’ve only just begun!

Location: We are location agnostic & our teams work from anywhere.

Core Responsibilities:

-Will be responsible for architecting, scaling and optimizing the entire technology platform across website and mobile for Zupee's Gaming Studio in alignment with the business vision.

-Will work closely with the founders, technology, product, marketing data science, data analytics, design, research & innovation, user relations team to identify opportunities for innovation and technical hurdles to business success.

-Will lead the evaluation and identification of the right technology stack for delivering Zupee's product portfolio.

-Will be responsible for driving the technology stack or engineering function-related people or team, processes, capabilities, and tools.

-Will establish key engineering-related metrics to measure product-stack mix success and optimization as the situation changes.

What are we looking for?

-Must have experience working in the Startup domain.

-Should have at least 9+ years of overall experience in engineering and must have played a leadership role, out of her/his overall experience.

-Hands-on engineering leader who has been an architect of scaling platform and deciding tech roadmap.

-Must have worked on emerging Tech Stacks.

-Must have a proven track record of independently architecting, scaling, and optimizing technology products from the ground up or prototype stage; delivering within time, budget and quality in the B2C environment.

-Good to have experience in startup domains and exp. starting or developing products from scratch.

-Must have demonstrated the ability to independently evaluate and identify relevant technology stacks (backend, frontend for mobile & web, and database management) for the product. (Preferably into NodeJS/ReactJS/Microservices architecture).

-Must have experience in business partnering, team building, program delivery, and product relatability.

-Has the ability to be hands-on, think clearly, analyze quantitatively, make data-driven decisions, communicate coherently, organize effectively, prioritize and relate to the business.

-Is metric-driven, fast-paced, attentive to detail, data-driven, and self-motivated.

-Is analytical, curious, a problem solver, and can influence stakeholders.

-Has a bias for diagnosis and action Culture Cues.

Responsibilities:

• Strong Technical Chops: You should know how to build highly scalable, robust, and fault-tolerant services that support our unique rate-of-growth requirements.
• You should be on top of the latest architectural trends.
• Fast Learners: We are looking for folks who thrive on new technologies and don't believe in one-size-fit all solutions.
• You should be able to adapt easily to meet the needs of our massive growth and rapidly evolving business environment.

• You understand requirements beyond the written word.
• Whether you're working on an API used by other developers, an internal tool consumed by our operation teams, or a feature used by millions of customers, your attention to details leads to a delightful user experience.

Requirements:

• Strong knowledge of MySQL, NoSQL, PostgreSQL, ElasticSearch.
• Experience in Java and web technologies.
• Experience in any one scripting language like Python.
• Hands-on experience with systems that are asynchronous, RESTful and demand concurrency.
• Knowledge of best software engineering practices for all stages of software development life cycle, including coding standards, code reviews, testing and deployment.