Fullstack 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

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. 

Requirement:

·        3-4 years of experience in web applications/full stack development using PHP, Ajax, Linux, MySQL, Apache

·        Good experience with PHP frameworks CodeIgniter (Laravel, symphony etc. would be a plus)

·        Hands on experience with SQL schema design, REST API design, API integrations

·        Working knowledge of cron jobs

·        Familiarity with modern libraries and frameworks. ie: Bootstrap, jQuery, etc

·        Expertise in developing highly scalable and performant web applications.

·        Proficient in debugging and diagnosing production systems

·        Experience in preparing design specifications/documents.

Good to have:

·        Familiar with Payment Gateways/Wallet integrations is a plus.

·        Experience working with JIRA, Bitbucket, Git, etc.

·        Good written and technical communication skills.

·        Working knowledge of WordPress with plug-in development.

Responsibilities:

·        Adhere to best practices in software development on PHP technology.

·        Deliver high-quality, unit-tested code that follows good coding principles.

·        Maintain a positive influence on your associate team members.

·        Excellent communicator and possess the ability to robust articulation.

·        Show high ownership and is self-driven.

·        Provide support on troubleshooting systems when issues are escalated.

·        Help deliver as a team, verifying that completed user stories meet business expectations.

Strong knowledge in Laravel.

● Should be having excellent development expertise in programming PHP, AJAX, OOPS Concept, Architecture, MySql, Normalization, JavaScript/Jquery and MVC architecture with a commitment to performance and efficiency.

● Workwith frontend technologies including Vue.js/ Nuxt js (basic knowledge) or React.

● Thorough knowledge of languages Java script, HTML5, CSS3, Object Oriented programming and design patterns.

Role and Responsibilities

•  Working with front-end developers and providing server-side algorithms of user-facing web application elements.
• Coding and creating functional web applications, optimizing code for increasing response time and efficiency.
• Analyzing the goals and requirements, efficiently handling bugs and errors, and finding effective solutions for the same.
•  Interacting with the database for storing data and ensuring that every user has access to what they search.
•  Accomplishing the projects and goals within deadline.
• Managing APIs that are executed across the devices.
•  Involving in defining the architecture of the system.

Required skills

• In-depth knowledge of PHP and related frameworks like Laravel, Codeigniter, Yii. Competent in Ruby, Python, nodeJs, and Java will be an added advantage.
• Good Communication, Analytical, Logical, and Leadership skills.
• Knowledge of front-end technologies, such as Angular, React, HTML, CSS, and JavaScript will be preferred.
• Capable of managing a hosting environment along with database administration such as MySQL, Oracle.
• Excellent knowledge of APIs (REST, SOAP) and Web services.
• Ability to scale applications to handle the load changes.
• Knowledge of accessibility and security compliance.
• Good to have experience in version control, such as GIT.

Role: Application Architect

Job Description:

Key Responsibilities:

1. Understand requirements, functional and non-functional requirements, and devise end to end approach and strategy to modernizeapplications
2. Plan, Design, and develop architectures for highly available, scalable, and secure enterprise systems
3. Ideate and drive automation, lead PoVs point of view / PoCs Proof of concept/lead in the development of minimal viable product
4. Identify risks, and issues, and work on a mitigation plan
5. Able to review enterpriseapplicationportfolios and be able to provide application rationalization and modernization strategies
6. Provide functional and/or technical expertise to plan, analyze, define, and support the delivery of future functional and technical capabilities for anapplicationor group of applications.
7. Assist in facilitating impact assessment efforts and in producing and reviewing estimates for work requests.

Technical Experience:

1. Highly experienced withapplicationarchitecture capabilities with cloud-native architectures, microservices, and serverless architectures
2. Understanding of Domain-driven design, Event-drivearchitecture
3. Equipped with in-depth experience in developingapplicationswith either PHP/Python or databases such as PostgreSQL, MySQL, etc.

Professional Attributes:

1. Candidate should have good communication skills
2. Candidate should have good documentation and presentation skills
3. Candidate should be a team player and must be able to collaborate and network with different teams
4. Highly motivated and should work with minimum supervision and unclear requirements

PRIMARY RESPONSIBILITIES :-

• Should have develop professional applications in PHP using CodeIgniter.
• Additional advantage if worked on frameworks like Laravel and Zend
• Extensive knowledge with JavaScript, jQuery or Angular
• Advance Level SQL knowledge
• Additional advantage if familiar with Server Configuration and Monitoring
• Should have working on Git Repository
• Candidate should have exceptionally good debugging skills.
• Clear about Object Oriented Programming Concepts.

SECONDARY RESPONSIBILITIES :-

• Ability to work independently and take ownership of the project.
• Should be capable to work in a team.
• Must have strong communication skills.
• Should be enthusiasts and able to take challenge.