Senior Fullstack Developer

Key Responsibilities & Skills

Strong hands-on experience in React.js, Node.js, Express.js, MongoDB

Ability to lead and mentor a development team

Project ownership – sprint planning, code reviews, task allocation

Excellent communication skills for client interactions

Strong decision-making & problem-solving abilities

Nice-to-Have (Bonus Skills)

Experience in system architecture design

Deployment knowledge – AWS / DigitalOcean / Cloud

Understanding of CI/CD pipelines & best coding practices

Why Join InfoSparkles?

Lead from Day One

Work on modern & challenging tech projects

Excellent career growth in a leadership position

About the Role

We are seeking a hands-on Tech Lead to design, build, and integrate AI-driven systems that automate and enhance real-world business workflows. This is a high-impact role for someone who enjoys full-stack ownership — from backend AI architecture to frontend user experiences — and can align engineering decisions with measurable product outcomes.

You will begin as a strong individual contributor, independently architecting and deploying AI-powered solutions. As the product portfolio scales, you will lead a distributed team across India and Australia, acting as a System Integrator to align engineering, data, and AI contributions into cohesive production systems.

Example Project

Design and deploy a multi-agent AI system to automate critical stages of a company’s sales cycle, including:

• Generating client proposals using historical SharePoint data and CRM insights
• Summarizing meeting transcripts
• Drafting follow-up communications
• Feeding structured insights into dashboards and workflow tools

The solution will combine RAG pipelines, LLM reasoning, and React-based interfaces to deliver measurable productivity gains.

Key Responsibilities

• Architect and implement AI workflows using LLMs, vector databases, and automation frameworks
• Act as a System Integrator, coordinating deliverables across distributed engineering and AI teams
• Develop frontend interfaces using React/JavaScript to enable seamless human-AI collaboration
• Design APIs and microservices integrating AI systems with enterprise platforms (SharePoint, Teams, Databricks, Azure)
• Drive architecture decisions balancing scalability, performance, and security
• Collaborate with product managers, clients, and data teams to translate business use cases into production-ready systems
• Mentor junior engineers and evolve into a broader leadership role as the team grows

Ideal Candidate Profile

Experience Requirements

• 5+ years in full-stack development (Python backend + React/JavaScript frontend)
• Strong experience in API and microservice integration
• 2+ years leading technical teams and coordinating distributed engineering efforts
• 1+ year of hands-on AI project experience (LLMs, Transformers, LangChain, OpenAI/Azure AI frameworks)
• Prior experience in B2B SaaS environments, particularly in AI, automation, or enterprise productivity solutions

Technical Expertise

• Designing and implementing AI workflows including RAG pipelines, vector databases, and prompt orchestration
• Ensuring backend and AI systems are scalable, reliable, observable, and secure
• Familiarity with enterprise integrations (SharePoint, Teams, Databricks, Azure)
• Experience building production-grade AI systems within enterprise SaaS ecosystems

Experienced Senior Full Stack Engineer to Build & Backend for Event Ticketing Platform Using Claude Code

Overview

We have the frontend already built in Replit for both user and admin experiences. We are looking for a very experienced software engineer to design, build, and scale a production ready backend for a high concurrency event ticketing platform.

This role is for a true senior engineer who actively uses Claude Code as part of their daily development workflow, understands how to review and harden AI assisted output, and can ship systems that hold up under real world load, QA, and security testing.

This is not a prototype or demo system. This backend must be reliable, scalable, secure, and extremely well documented.

What You Will Be Building

• Backend services for an event ticketing platform

• Multi tenant architecture supporting thousands of organizers and events

• High concurrency purchase and checkout flows

• Secure user, admin, and system level access controls

• Production deployments with secrets management, middleware, and security layers

• Observability, logging, and metrics suitable for QA and load testing

• A thoroughly documented backend that future engineers can onboard into quickly

Core Engineering Requirements

• 10 plus years of professional software engineering experience

• Expert level experience using Claude Code or equivalent AI coding agents in real production workflows

• Deep experience building backends with Node.js

• Strong experience with Supabase and PostgreSQL

• Experience deploying and scaling applications on Vercel

• Proven experience extending existing codebases safely

• Strong API design and database performance fundamentals

• Ability to reason clearly about concurrency, transactions, and failure modes

Scalability and Performance Expectations

The backend must be designed to support:

• Hundreds of thousands of ticket purchases

• Thousands of concurrent users and tenants

• Large traffic spikes during on sale windows

• Load testing across all major latency percentiles including p90, p95, and p99

• Extremely low tail latency under high concurrency

• Graceful degradation and recovery under stress

You should be comfortable designing and implementing caching strategies, queue based workflows, idempotent operations, locking mechanisms, and transactional safety.

Security and Production Readiness

You must be able to:

• Set up production environments with proper secrets management

• Implement middleware for authentication, authorization, and rate limiting

• Design secure communication between frontend and backend

• Apply industry best practices for security hardening

• Prepare the system to pass penetration testing

• Maintain clean separation of concerns and least privilege access

Documentation and Developer Experience Requirements

High quality documentation is a hard requirement for this role.

You must have experience:

• Using AI powered documentation tools to generate and maintain technical documentation

• Producing clear architectural overviews and system diagrams

• Writing detailed README files and onboarding guides

• Documenting APIs, data models, and critical flows

• Keeping documentation in sync with code changes over time

We expect the backend to be easy to understand, easy to extend, and well explained for future engineers.

How We Evaluate Candidates

We are looking for engineers who can demonstrate:

• Real production systems they have built or scaled

• Clear judgment in how they use Claude Code and validate AI generated output

• Strong opinions on production readiness backed by experience

• The ability to move fast without sacrificing quality or safety

A short paid technical task may be used that involves real backend work with production quality code and documentation.

Web Developer 

A good Web Developer should have experience in designing, developing, and maintaining websites across multiple platforms. The most typical duties and responsibilities of the web developer include:

1. ·      Designing and building responsive and mobile-friendly websites optimised for different devices and browsers
2. ·         Writing clean, efficient, and well-documented code using languages such as HTML, CSS, XML, JavaScript AND React
3. ·         Implementing and maintaining website content management systems
4. ·         Troubleshooting and debugging issues to ensure websites are functioning correctly
5. ·         Staying up-to-date with the latest web technologies and industry trends to ensure the website is current and secure
6. ·         Creating and managing databases for website functionality
7. ·         Ensuring website accessibility and security to protect sensitive data and user information
8. ·         Maintaining and updating existing websites
9. ·         Testing both new and current website and correcting potential errors that may arise

Experience : 5 to 10 Years

Location : Mulund

JD | Senior Software Engineer (J2EE/JEE Full Stack)

Summary

Looking for a senior developer who has strong skills in front-end and back-end technologies including HTML, CSS, JavaScript, Java, JSP, Servlets, Ajax, SQL, Database Stored Procedures, and J2EE frameworks.

This position requires J2EE Full Stack development experience of 2 to 6 years. Further it requires good multitasking and communication skills. Further it requires good communication skills - written and spoken, and good multi-tasking skills where he/she can manage multiple tasks with high productivity. The candidate should also have good aptitude, should be able to learn iTech’ s cloud-based products within a reasonable time, hardworking and should have the ability to go the extra mile to complete the assigned tasks on time.

Essential Duties and Responsibilities

• Develop the various modules, features and reports in our products using JEE and database technologies/frameworks
• Take responsibility and work with peer developers in the team in completing the features/tasks assigned.
• Perform code review with peer developers on various features in the product.
• Handle the support tickets which requires development effort and fix them.
• Learning and implementing new front-end and back-end technologies.
• Mentor and guide junior developers.
• Involve in building and deploying the product version in UAT and Production environment.
• Work on multiple versions of the projects in parallel.
• Perform other related duties as assigned.
  • Perform other related duties as assigned.

Qualifications

• Tech/B. E./MCA/M. Tech with 2 to 6 years of related work experience
• Working knowledge in front-end and back-end technologies including HTML, CSS, JavaScript, Java, JSP, Servlets, Ajax, SQL, Database Stored Procedures, and frameworks such as Spring, Bootstrap, jQuery.
• Exposure to SOAP/RESTful Web Services, XML/JSON technologies, JBoss/WildFly Application Server, PostgreSQL database is a bonus
• Knowledge in any tools including Eclipse IDE, Source Code Control Systems such as Git, and Software Configuration Management systems would be a plus.

Lead Java Full Stack Engineer

Pune, Maharashtra, India

Must-Haves :

Top Mandatory Skills: Java, Microservices, Spring Boot, React, JavaScript, typeScript 

Joining time / Notice Period: Immediate joiners

Minimum Relevant Experience: 08+ Years

************

No gaps in organization

No job hoppers(candidate must have good stability)

Joining time / Notice Period: Immediate to 30 days

No Poach Clients (Plus other Strict No-Nos) :

NA 

Nice to Haves :

Skills: Cryptography

Target Companies :

Additional Guidelines :

Office Location : Pune - Hybrid work Model - 3 days a week

Interview Process : 2 - 3 Technical Rounds (Panel in the US)

Relocation Expenses: NA

Notice period : Immediate to 30days

Responsibilities:

● Work with development teams and product managers to ideate software solutions.

● Design user-side and server-side architecture.

● Build the front-end of applications through appealing visual design.

● Develop and manage well-functioning databases and applications on MYSQL.

● 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.

Requirements:

● Proven experience as a Full Stack Developer or similar role.

● Experience developing web and mobile applications. ● Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript).

● Knowledge of back-end language(Node.js) and JavaScript frameworks (Angular, React, Vue but preferably React).

● Familiarity with MySQL databases, web servers (e.g. Apache) and UI/UX design.

● Excellent communication and teamwork skills.

● Great attention to detail Organizational skills. The knowledge of following, will fetch you brownie points during interviews:

● Ruby on Rails.

● Familiarity with AWS.

● Familiarity with Docker

About OJ Commerce: 

OJ Commerce is a fast-growing, profitable online retailer based in Florida, USA with a full-fledged India office based in Chennai driven by a sophisticated, data-driven system to run the operations with virtually no human intervention. We strive to be the best-in-class ecommerce company delivering exceptional value to customers by leveraging technology, innovation and brand-partnerships to provide a seamless & enjoyable shopping of high-quality products at the best prices to our customers.

Responsibilities:

Work with business-stakeholders to understand requirements, prototype, build and deploy it.

CRUD the backend code you own keeping maintenance, performance and security in mind.

Keep up breast of latest technologies and its ecosystem and adopt ones that aid safe product delivery at speed.

Automate the boring and mundane stuff for you prefer to be productive than being busy.

We are flat. Be responsible for professional growth of self and the team. 

• Tune application for performance.
• Take initiatives and manage change to work towards business goals at speed without compromising safety.
• Coach full-stack developers on backend skills.
• Provides problem resolution support, specific to application issues, identifies and resolves problems in application software, determines symptoms and ensures accurate problem definition

Develop functional, architectural and other documentation as required for productive functioning of teams.

• Be the brand ambassador for OJ Commerce by speaking at meetups, conferences, etc.
• We are fluid. Be ready for changing dynamics in responsibilities from time to time. Exciting isn't?
• Take the lead in digital transformation of legacy applications.

What you need to shine?

• You have the prior experience in modernising legacy applications.
• You are a passionate hands-on developer with deep experience in building enterprise grade software in Microsoft ASP.NET Core, ASP.NET MVC, Web API, SOA, Micro-Services and RESTful Services with knowledge of SQL Server database.
• You have the ability to see and work on the big picture (Application Architecture) and devilish details (Complex Code).
• Strong experience in developing web applications using C#, VB.Net, .NET, LINQ, Net Framework 4.0, MVC 3/4/5, ASP.NET Web API, .Net Core etc.
• You are Cloud savvy, preferably Google Cloud.
• You have rich experience in Object-Oriented Programming (OOP) with good knowledge of practical design-patterns and its applications.

Hands-on experience in building SOA or Micro-services preferably on .NET Core.

Proven Architectural skills with high standards in Code quality

Knowledge of ReactJS/Typescript would be added advantage.

Practical experience in Agile development methodologies of using CI/CD.

Extreme Programming (TDD) experience is sought after by us.

What we Offer

• Greenfield opportunity to transform legacy backend applications to latest technology stack.
• Fast-paced start-up environment: This is not for the faint hearted; you need grit and passion as much as you need the core skills.
• Work in an interdisciplinary team where learning from one another and developing solutions cross-functionally is a key part of our culture.
• Golden opportunity to make history by making big business impact.
• Competitive salary to take good care of self and family.
• Insurance Benefits: Medical and Accident cover.
• Flexible Working Hours

Requirement for Python Developer

Require more than 3 years of hands-on experience with Python and associated third-party libraries.

Should have strong logical and programming skills.

Experience with Django and DRF.

Should have knowledge about MongoDB

Coordinating with the team and sharing ideas in project planning and development

Main Responsibilities of a Python Developer

· Experience with DevOps technologies and Knowledge about APIs to architect cloud-ready applications

· Strong verbal and written communication skills

· Writing effective and scalable Python codes

· Designing and implementing robust applications

· Debugging applications to ensure low latency and high-availability

· Integrating user-facing elements with server-side logic

· Implementing security and data protection

· Accommodating various data storage solutions