Full Stack 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

JD-

Job Title: Full Stack Developer (ASP.NET & MySQL)

Experience Required: 3 to 5 Years

Location: Kalina, Mumbai (Onsite)

Employment Type: Full-Time

About the Role:

We are looking for a skilled and proactive Full Stack Developer with 3 to 5 years of hands-on experience in ASP.NET and MySQL to join our dynamic team in Kalina, Mumbai. This is a fully onsite role, ideal for professionals who enjoy working in a collaborative office environment and are passionate about building scalable web applications.

Key Responsibilities:

• Design, develop, test, and maintain web applications using ASP.NET (MVC/Web API).
• Write clean, scalable, and efficient code for both front-end and back-end development.
• Develop and manage MySQL databases, including design, optimization, and complex queries.
• Collaborate with UI/UX designers, front-end developers, and other stakeholders to deliver seamless user experiences.

Required Skills & Qualifications:

• 3 to 5 years of experience in full stack development.
• Strong proficiency in ASP.NET (MVC, Web API) and C#.
• Solid experience with MySQL database design, queries, and optimization.
• Good understanding of front-end technologies such as HTML, CSS, JavaScript, and jQuery.
• Familiarity with version control tools like Git.

Good to Have (Preferred):

• Experience with front-end frameworks (e.g., Angular, React).
• Knowledge of RESTful API development and integration.
• Understanding of Agile methodologies.

Location & Work Mode:

• Location: Kalina, Mumbai
• Work Mode: Onsite (Work from Office)

Job Title: Lead I – Python Full Stack Engineer (Python + React)

Location: Hyderabad

Work Model: Hybrid (3 days in office)

Notice Period: 0–15 Days (Immediate joiners preferred)

Job Summary:

We are looking for a Lead Python Full Stack Engineer with 6–7 years of development experience to join our engineering team in Hyderabad. The ideal candidate will have strong hands-on expertise in React UI and Python backend development, with solid experience in modern testing frameworks, CI/CD, and database management.

Key Responsibilities:

• Design, develop, and maintain full-stack applications using React (frontend) and Python (backend).
• Implement reusable UI components and ensure a seamless user experience with React.
• Build and manage backend services using frameworks such as Django, Flask, or FastAPI.
• Develop and maintain unit and end-to-end tests using frameworks like Jest, Mocha, and Cypress.
• Manage state using libraries such as Redux, Zustand, or MobX.
• Configure and maintain CI/CD pipelines for efficient deployment.
• Integrate with relational and non-relational databases such as PostgreSQL, MySQL, or MongoDB.
• Collaborate with cross-functional teams to deliver scalable, maintainable solutions.

Required Skills & Experience:

• 6–7 years of full-stack development experience.
• Strong hands-on expertise in React UI (top priority).
• Proficiency in Python with frameworks like Django, Flask, or FastAPI.
• Expertise in unit testing (Jest, Mocha) and E2E testing (Cypress).
• Experience with Vite or similar build tools.
• Strong understanding of CI/CD pipelines.
• Experience with RESTful APIs, web services, and routing (React Router).
• Solid understanding of PostgreSQL/MySQL/MongoDB databases.
• Strong problem-solving and debugging skills.

Nice to Have:

• Familiarity with Node.js or Express.js for backend development.
• Exposure to front-end technologies such as HTML, CSS, and JavaScript (ES6+).

Responsibilities

• Mentoring Team of Juniors, Code Reviews, and System Design Understanding
• Design and develop APIs using NodeJs, TypeScript, and deployment using the CICD pipeline.
• Apply code reviews and development quality reviews to make sure best practices are implemented
• Expertise with MySQL including the design of schemas and development for these databases
• Understanding of System Architectures, Design Patterns, and SOLID Principles
• Knowledge of git-based workflows such as git-flow, Proficient with code editors & linting tools

Requirements

• 2+ years of development experience with NodeJS, and Javascript frameworks related to the web stack
• Understanding the nature of asynchronous programming and its quirks and workarounds
• Excellent communication skills, verbal and written

Good to have

• Experience with AWS Microservices
• Experience with payment gateways
• Exposure to AWS Services, policies, and the DevOps pipeline is a plus.
• Expertise with React, Redux, Hooks, and its core principles

•  Experience as a Full Stack Developer or similar role 

  • Familiarity with common stacks
  • Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, JSON, jQuery)
  • Knowledge of multiple back-end languages (e.g., C#, Java, Python) and JavaScript frameworks (e.g., Angular, Node.js)
  • Excellent communication and teamwork skills.
  • Great attention to details, Organizational skills, An analytical mind
  • Degree in Computer Science, or relevant field.

  Responsibilities 

  • 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.

   

What you need to have:

We are looking for an experienced full-stack engineer (with a path to becoming CTO) to join our founding team! We're a B2B SaaS startup with a young vibrant culture taking this idea from inception to impact.

About the job

We want to talk to you if:

• You've built multiple, kick-ass Chrome extensions
• You've built commercial apps using chat frameworks (e.g. Chat 21/Getstream.io etc.)
• You are a React.JS, Node.JS, Javascript, & Postgres wiz
• You have experience building multi-platform apps (Web + mobile web)
• Have built or implemented integration frameworks at scale (or experience with iPaaS frameworks)
• You are obsessive about clean, optimized & scalable code with copious documentation
• You are excited about building out a team and have aspirations to become a CTO

Having B2B SaaS Startup experience is preferred and a big plus

About Us

SmartCue wants to make product demos more effective and as a result help sales teams optimize their sales cycles. Our fundamental belief is that everything we build must eliminate or reduce friction for a salesperson.

Fast Track Your Application

• Think about the Ideal Customer for SmartCue
• Download the trial for SmartCue, sign up, download, experience the product, and provide feedback on how to overhaul the current experience of the product to add immediate value to the customer

• We don't need you to fully code any feature in its entirety and are not looking for free work.

The idea is to identify folks who get what we are trying to do with SmartCue and find faster alignment with the right candidate.

Here is a video walkthrough for additional context - https://www.loom.com/share/9609cf1855e64926b71a1ff840bd7347" target="_blank">https://www.loom.com/share/9609cf1855e64926b71a1ff840bd7347

The Opportunity

• In this position, you must be ready for a fast-paced startup environment.
• Our ideal candidate is willing to be flexible and able to wear many hats.
• Must have experience engineering and scaling technologies & teams with a proven track record of success.
• Our perfect candidate is well-versed in Chrome Extensions, creating delightful front-end experiences for users, enjoys building and scaling the backend infrastructure, and has an itch to adopt the newest technologies.
• Remote forever, if you like!

Duties Include

• Develop + understand the technological roadmap
• Develop feature rollout systems and processes
• Develop strategies and solutions from customer discovery sessions
• Hire + manage outside/contracted engineering talent
• Scale while staying lean through the early stages up to fundraising
• Oversee ClickUp for project and product management, roadmap, bugs, and backlog grooming
• Collaborate with marketing to optimize user experience, onboarding and reduce churn
• Oversee security + compliance strategies
• Help field support desk inquiries
• And more...

We are an equal opportunity employer and proud to be committed to diversity and inclusiveness. We consider all qualified applicants without regard to race, nationality, gender, gender identity or expression, sexual orientation, religion, disability, or age.