PHP Developer

Senior AI Engineer — Ruby on Rails

Techjays · Coimbatore / Chennai · Hybrid · Immediate – 30 Days Notice

About Techjays

We're the AI Reimagination Company — and that's not a tagline we put on a deck. It's what we actually do.

Techjays helps global enterprises rebuild the way they operate using AI at the core: not as a pilot, not as a feature, but as a foundational layer across products, workflows, and infrastructure. We're an Anthropic partner, which means our engineers get early access to frontier models and tools before they hit the market.

Our team includes engineers and leaders from Google, Akamai, NetApp, ADP, Cognizant Consulting, and Capgemini. We run like a high-agency startup, but we build production systems that real enterprise clients depend on.

Every project is greenfield. Every line of code you write ships.

What This Role Actually Is

This isn't a "keep the monolith alive" job.

You'll be designing and building new AI-powered features, integrating LLM APIs into production Rails applications, and using Claude Code as a core part of your daily workflow — not as an experiment. You'll work directly with US-based enterprise clients alongside Product Managers, AI Business Consultants, and Delivery Excellence Managers.

Your architecture decisions will have visible business impact.

What You'll Own

• Design, build, and maintain production-grade Ruby on Rails applications for US enterprise clients — from architecture to deployment
• Integrate LLM APIs (Claude, GPT-4, Gemini) into the Rails stack, building AI-powered features that drive real business outcomes
• Use Claude Code daily as your AI development partner — for generation, debugging, documentation, and velocity
• Build responsive, performant React front-ends from wireframes and design specs
• Own RESTful and GraphQL API design for client applications and third-party integrations
• Drive database design and optimisation — schema, queries, indexing, and migrations on PostgreSQL/MySQL
• Lead code reviews and raise the technical bar through constructive feedback
• Document architecture decisions, API contracts, and implementation patterns

Must-Haves

• 6+ years of deep, production-grade Ruby on Rails experience — advanced framework patterns, background jobs (Sidekiq/Redis), design patterns, best practices
• Hands-on experience with Claude Code (Anthropic) for AI-assisted development — this is central to how we build
• Strong React skills — hooks, component architecture, state management, wireframe to production
• Expert-level PostgreSQL/MySQL — schema design, query optimisation, indexing, performance tuning
• Proven experience designing RESTful and GraphQL APIs at scale
• Experience integrating third-party LLM APIs (OpenAI, Anthropic, Google Gemini) into production Rails apps
• Strong software architecture fundamentals — MVC, service objects, design patterns, testability
• Deep comfort with Git, Gitflow, and PR-based collaboration workflows

Good to Have

• Python for scripting, automation, or backend service integration alongside Rails
• AWS familiarity — EC2, S3, RDS, Lambda — for deployment and infrastructure
• MongoDB or NoSQL in polyglot persistence architectures
• Vector databases (Pinecone, pgvector, Weaviate) for LLM application development
• LangChain, LangGraph, or similar orchestration frameworks for AI agents
• SaaS multi-tenancy patterns and high-traffic web application experience
• Open source contributions or a strong public GitHub profile

Why Join Techjays

• Claude Code is standard practice here, not a side experiment — you'll use it every day to ship faster and smarter
• Anthropic partner access — early visibility into frontier AI tools and capabilities before the market sees them
• Greenfield only — you'll design architecture, not inherit technical debt
• Global client exposure — your engineering decisions translate directly to measurable business outcomes for US enterprise clients
• Team pedigree — you'll learn alongside engineers who've shipped at real scale at Google, Akamai, and NetApp
• AI is the product here, not a feature. You'll spend your career at the intersection of software engineering and AI systems

What We're Looking For Beyond the Resume

• Builder mindset — you think in systems, not tickets
• Ownership — you take features from idea to production
• Structured thinking in ambiguous, fast-moving environments
• Clear communicator, collaborative team player

What We Offer

• Competitive compensation
• Hybrid work — Coimbatore office or remote flexibility
• Paid holidays and flexible time off
• Medical insurance for self and family (up to ₹4 Lakhs per person)
• Opportunity to work on production-grade AI systems for global clients
• A culture built on clarity, integrity, and continuous growth

Location: Coimbatore / Chennai — Hybrid Notice Period: Immediate to 30 days preferred

Key Responsibilities

Develop and maintain scalable fullstack applications.

Collaborate with cross-functional teams to deliver innovative solutions.

Ensure performance optimization and adherence to best practices.

Provide technical leadership and mentorship to junior developers.

Required Skills

Proficiency in: Java, Spring Boot, MySQL, Hibernate, ReactJS

Knowledge of: NoSQL databases

Strong analytical and problem-solving skills

Role Description

Responsible for developing web applications as per the product requirements with a pre-approved design across multiple platforms using programming tools for Web development and Mobile application development. Work collaboratively with ML scientists, engineers, product managers, and Business SMEs in seeking details on the requirements, writing up technical specifications, proposing the tools and methods for the solution, developing the application after necessary approvals, unit testing the solution, providing testing support, and troubleshooting support for testers, participating in deployment plan, deployment and post-deployment support. Application development will involve wrapping the deep learning algorithms to provide a smart and engaging user experience.

General Requirements

• Should be familiar and have a working knowledge of different databases like MySQL, MongoDB, web servers (e.g. Apache)
• Knowledge of multiple back-end languages (e.g. C#, Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js)
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Fluent with multi-tier systems, client-server concepts.
• Experience in debugging application programs, troubleshooting techniques, root cause analysis of problems.
• Must possess the good understanding and proven techniques incorporating Data Security concepts in application development.
• Knowledge and experience with applications running on on-premises data centers and on Cloud services.
• Experience working in a Project Team and exposure to test-driven development, different project methodologies such as Agile.
• Very good communication skills with collaborative, positive, can-do, user-centered attitude in a team environment.
• Innovative thinking capabilities, ability to multitask, maintain attention to detail in pressure and time sensitive situations.
• Demonstrated ability to interpret requirements and deliver reliable, scalable, tested solutions.
• Fluent in English, reading, writing, speaking and listening.

Key Requirements

• BS / B. Tech / BE degree in Computer Science or equivalent.
• Minimum 3 years of experience in building on web technologies and frameworks (JavaScript / TypeScript / HTML / CSS / AngularJS / Electron / ReactJS) database (MySQL or MongoDB ) and backend Technologies (Python, NodeJS, Java etc)
• Experience developing desktop and mobile application

Mode of hire : Fulltime

Experience : 0-5 Years

Job Description :

• Strong knowledge of PHP web frameworks (Codeigniter, Laravel,Yii2)
• Understanding the fully synchronous behavior of PHP.
• Understanding of MVC design patterns
• Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3 & Knowledge on API integration & REST services.
• Knowledge of object oriented PHP programming.
• Strong knowledge of the common PHP or web server exploits and their solutions
• User authentication and authorization between multiple systems, servers, and environments
• Familiarity with SQL/Mysql/Mongo DB databases 

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