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

Responsibilities:

• Collaborate with the project team to gather requirements and understand user needs.
• Design and develop web applications using the MERN stack.
• Write clean and efficient code for both the front-end and back-end.
• Ensure the creation of responsive and cross-browser compatible web applications.
• Optimize applications for speed, performance, and scalability.
• Debug and troubleshoot issues, and participate in code reviews.
• Develop and maintain RESTful APIs for front-end interactions.
• Integrate third-party libraries and APIs when required.
• Keep up-to-date with the latest web development trends and best practices.
• Conduct unit and integration testing to ensure code quality.
• Collaborate with team members and stakeholders to meet project deadlines.
• Document code and technical specifications.
• Participate in knowledge sharing and continuous learning within the team.

Requirements:

• A Bachelor's degree in Computer Science, Engineering, or a related field is preferred, but not mandatory.
• A minimum of 2 years of hands-on experience as a MERN Stack Developer.
• Proficiency in Node.js and Express.js for building the back-end of web applications.
• Strong knowledge and experience in React.js for front-end development.
• Expertise in MongoDB for database design and management.
• Strong understanding of JavaScript, ES6+
• Familiarity with RESTful API development and integration.
• Ability to work with HTML, CSS, and responsive design principles.
• Experience with version control systems, such as Git.
• Problem-solving skills and an aptitude for learning new technologies.
• Strong communication and teamwork skills.

Full Stack Developer

Born at MIT, GeniusMesh is an executive networking, career coaching and recruitment platform. We are building our offshore team to support our growth. 

We are looking for a Full Stack Developer to produce scalable software solutions. You’ll be part of a cross-functional team responsible for the full software development life cycle, from conception to deployment.

As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks and third-party libraries. You should also be a team player with a knack for visual design and utility. You must be familiar with agile methodologies

• Work with development teams and product managers to ideate software solutions
• Design client-side and server-side architecture
• Build the front-end of applications through appealing visual design
• Develop and manage well-functioning databases and applications
• Write effective APIs
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation
• Work with data scientists and analysts to improve SaaS offerings

• Proven experience as a Full Stack Developer
• Experience developing desktop and mobile applications
• Familiarity with common stacks
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Knowledge of multiple back-end languages (e.g. C#, Java, Python) and JavaScript frameworks (e.g. React, Node.js)
• Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• Willing to learn new tools and technologies
• An analytical and entrepreneurial mindset
• Degree in Computer Science, Statistics or relevant field
• Willing to work in a fast paced innovative environment

Your Key Responsibilities

You will build robust, secure and scalable micro-services

• You will be responsible to implement RESTful service
• You will take ownership to build scalable, reliable and performant code that complies with our internal code guidelines
• Take part in code reviews and architecture development
• You will influence how we build individual features and products, and bring in best practices and patterns that can be used for engineering lifecycle
• You will be driving architecture and design discussions and will be responsible to run and maintain good infrastructure

What to Bring

B.Tech/ B.E. in Computer Science from a reputed college or related technical discipline with 5-8 years of experience in software development

• Knowledge for data structure and an eye for architecture
• Familiar with Git Architecture
• Experience with reactive programming
• Experience in building RESTful APIs with monitoring, fault tolerance and metrics
• Exposure to relational and NoSQL databases (MongoDB, Redis)
• Exposure to server-side services using ElasticSearch and ESB - Camel, ActiveMQ
• Experience in MEAN stack development
• Strong experience with AWS Stack