Senior Full Stack JavaScript Developer (Tech Lead)

Key Responsibilities

Develop and maintain scalable applications using MongoDB, MySQL/PostgreSQL, Node.js, Express.js, React.js, and TypeScript.

Design, develop, and optimize RESTful APIs and GraphQL services.

Lead and mentor a team of developers, ensuring best coding practices, performance, and security.

Collaborate with UI/UX designers, product managers, and DevOps teams to streamline development.

Contribute to AI-powered application development (if experienced in AI/ML).

Required Skills & Qualifications

✅ 2.5+ years of experience in MERN stack development.

✅ Expertise in React.js, TypeScript, Node.js, and Express.js.

✅ Strong database management skills with MongoDB, MySQL, or PostgreSQL.

✅ Proven experience in leading development teams and conducting code reviews.

✅ Excellent problem-solving and communication skills.

✅ Bonus: Experience in AI/ML-based applications is a plus.

Why Join Us?

🚀 Exciting Projects – Work on AI-driven and scalable web solutions.

🤝 Leadership Opportunity – Lead and mentor a talented team of developers.

💰 Competitive Compensation – ₹40K - ₹60K per month.

🏡 Dynamic Work Environment – Collaborative, innovation-driven workplace.

We're looking for an experienced Full-Stack Engineer who can architect and build AI-powered agent systems from the ground up. You'll work across the entire stack—from designing scalable backend services and LLM orchestration pipelines to creating frontend interfaces for agent interactions through widgets, bots, plugins, and browser extensions.

You should be fluent in modern backend technologies, AI/LLM integration patterns, and frontend development, with strong systems design thinking and the ability to navigate the complexities of building reliable AI applications.

Note: This is an on-site, 6-day-a-week role. We are in a critical product development phase where sthe peed of iteration directly determines market success. At this early stage, speed of execution and clarity of thought are our strongest moats, and we are doubling down on both as we build through our 0→1 journey.

WHAT YOU BRING:

You take ownership of complex technical challenges end to end, from system architecture to deployment, and thrive in a lean team where every person is a builder. You maintain a strong bias for action, moving quickly to prototype and validate AI agent capabilities while building production-grade systems. You consistently deliver reliable, scalable solutions that leverage AI effectively — whether it's designing robust prompt chains, implementing RAG systems, building conversational interfaces, or creating seamless browser extensions.

You earn trust through technical depth, reliable execution, and the ability to bridge AI capabilities with practical business needs. Above all, you are obsessed with building intelligent systems that actually work. You think deeply about system reliability, performance, cost optimization, and you're motivated by creating AI experiences that deliver real value to our enterprise customers.

WHAT YOU WILL DO:

Your primary responsibility (95% of your time) will be designing and building AI agent systems across the full stack. Specifically, you will:

• Architect and implement scalable backend services for AI agent orchestration, including LLM integration, prompt management, context handling, and conversation state management.
• Design and build robust AI pipelines — implementing RAG systems, agent workflows, tool calling, and chain-of-thought reasoning patterns.
• Develop frontend interfaces for AI interactions including embeddable widgets, Chrome extensions, chat interfaces, and integration plugins for third-party platforms.
• Optimize LLM operations — managing token usage, implementing caching strategies, handling rate limits, and building evaluation frameworks for agent performance.
• Build observability and monitoring systems for AI agents, including prompt versioning, conversation analytics, and quality assurance pipelines.
• Collaborate on system design decisions around AI infrastructure, model selection, vector databases, and real-time agent capabilities.
• Stay current with AI/LLM developments and pragmatically adopt new techniques (function calling, multi-agent systems, advanced prompting strategies) where they add value.

BASIC QUALIFICATIONS:

• 4–6 years of full-stack development experience, with at least 1 year working with LLMs and AI systems.
• Strong backend engineering skills: proficiency in Node.js, Python, or similar; experience with API design, database systems, and distributed architectures.
• Hands-on AI/LLM experience: prompt engineering, working with OpenAI/Anthropic/Google APIs, implementing RAG, managing context windows, and optimizing for latency/cost.
• Frontend development capabilities: JavaScript/TypeScript, React or Vue, browser extension development, and building embeddable widgets.
• Systems design thinking: ability to architect scalable, fault-tolerant systems that handle the unique challenges of AI applications (non-determinism, latency, cost).
• Experience with AI operations: prompt versioning, A/B testing for prompts, monitoring agent behavior, and implementing guardrails.
• Understanding of vector databases, embedding models, and semantic search implementations.
• Comfortable working in fast-moving, startup-style environments with high ownership.

PREFERRED QUALIFICATIONS:

• Experience with advanced LLM techniques: fine-tuning, function calling, agent frameworks (LangChain, LlamaIndex, AutoGPT patterns).
• Familiarity with ML ops tools and practices for production AI systems.
• Prior work on conversational AI, chatbots, or virtual assistants at scale.
• Experience with real-time systems, WebSockets, and streaming responses.
• Knowledge of browser automation, web scraping, or RPA technologies.
• Experience with multi-tenant SaaS architectures and enterprise security requirements.
• Contributions to open-source AI/LLM projects or published work in the field.

WHAT WE OFFER:

• Competitive salary + meaningful equity.
• High ownership and the opportunity to shape product direction.
• Direct impact on cutting-edge AI product development.
• A collaborative team that values clarity, autonomy, and velocity.

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

Delivery Solutions is a Retail eCommerce OXM Platform that provides retailers with out-of-the-box solutions to power Same-Day Delivery, Curbside, In-Store Pickup, Shipping, and Post Purchase experiences. We are trusted with some of the biggest names in multiple verticals of retail like Sephora, AT&T, Footlocker, Michael's, Office Depot, GameStop, Total Wine, Sally Beauty, Abercrombie & Fitch Co. Belk, Loblaw, Vineyard Vines etc.

Our SAAS-based solution is highly flexible and interacts seamlessly with E-commerce properties, OMS, WMS, and POS systems for a highly scalable experience and a delighted customer base.

Delivery Solutions is a wholly-owned subsidiary of UPS | We are a certified Great Places To Work Company

Role: Senior Software Engineer - MEAN Stack

Reports to: Team Lead

Division/Department: Product

Work Location: India - Remote / Pune

We are seeking highly skilled and experienced Senior Software Engineers to join our SaaS company. As a Senior Software Engineer, you will play a pivotal role in the development and enhancement of our cutting-edge software products. You will work closely with cross-functional teams to design, develop, and deploy scalable software solutions using the MEAN stack (MongoDB, Express.js, Angular, Node.js) and related technologies.

Responsibilities:

• Collaborate with product managers, designers, and other stakeholders to define software requirements and translate them into technical specifications.
• Design and develop robust and scalable software solutions using the MEAN stack and other relevant technologies.
• Take ownership of feature development and deliver high-quality code on time.
• Participate in code reviews to ensure code quality and adherence to coding standards.
• Troubleshoot and debug software issues, and identify and implement effective solutions.
• Collaborate with DevOps teams to ensure smooth deployment and operation of software applications.
• Stay up-to-date with the latest industry trends, tools, and technologies and make recommendations for process improvements.

Qualifications:

• Bachelor's degree in Computer Science, Software Engineering, or a related field. (Master's degree preferred)
• 4+ years of hands-on experience in MEAN stack development, including MongoDB, Express.js, Angular (version 2 or higher), and Node.js.
• Proven experience working in a product-based company, delivering software solutions to customers.
• Strong understanding of Agile methodologies and Agile development practices.
• Proficient in front-end technologies such as Angular, HTML, CSS, and responsive design principles.
• Solid understanding of back-end technologies including Node.js, RESTful APIs, and server-side frameworks.
• Experience with cloud platforms, specifically AWS, and familiarity with related services.
• Knowledge of JSON, Kibana, JIRA, and Jenkins is a plus.
• Strong problem-solving skills and the ability to work independently as well as in a team.
• Excellent communication and interpersonal skills, with the ability to effectively collaborate with cross-functional teams.

If you are a self-motivated individual with a passion for delivering high-quality software and want to work with a team that values creativity and innovation, then we encourage you to apply for this exciting opportunity. Join our team and be part of a dynamic environment where your expertise will make a significant impact on our software products. 

• Please submit your resume along with any relevant project portfolios or GitHub repositories, for consideration.

• We are looking for a very Senior or Lead backend engineer with specialization in .NET technologies.
• This is an exciting opportunity to build a clean and modern framework for a customer-facing ecommerce product. You will be part of a product team in San Francisco, USA and Bengaluru, India.
• If you are passionate about building scalable services, you are well-versed with web technologies like MVC, you enjoy working with super smart people that you can learn from and contribute to their knowledge – this is the perfect position for you.
• You should have prior experience in leading engineering projects in an Agile environment, i.e. work with Product Managers to convert product specifications to technical specifications; design and code for complex features; ensure clean code is delivered by team.
• Our core application is used by 100,000+ paying customers, so there's lot of opportunity to make direct impact.

Requirements: ·

• 5+ years of experience in .NET and C#
• Expertise in developing services (SOAP-WCF and REST)
• Expertise in web development frameworks like ASP.NET MVC
• Good knowledge of database concepts and Microsoft SQL Server
• Solid foundation in computer science, with strong competencies in data structures, design patterns, concurrency, algorithms, and software design
• Experience working in any of the JavaScript frameworks like Ember.js, AngularJS or ReactJS is a bonus.
• Strong analytical and troubleshooting skills;
• Bachelors or Master’s degree in Computer Science (or equivalent).
• Note: Bangalore Office at WeWork-Bellandur.
• Salary will be on-par with best in Bangalore.

• Proficiency with NodeJs, ES6, Express;
• Experience in Source Control (Bitbucket/GIT);
• Experience in developing and scaling B2B applications.
• Knowledge and experience with using Restful API;
• Must be able to design components to drive reusability and performance;
• Must be able to build responsive design;
• Design, develop, and maintain code that meets requirements, is high quality, and performs efficiently and effectively to provide a great customer experience;
• Write production quality and thoroughly tested code.

• Strong analytical and logical skills, ability to work as an individual contributor
• Candidate must have in-depth knowledge of React JS, Node JS, MongoDB, JavaScript (ES6 and Type Script)
• Proficient with HTML, CSS - Master of jQuery and CSS3, less, Sass, Familiar with
• Proficient understanding of code versioning tools, build process such as And CI CD Process
• Familiar with Jira, Confluence and Agile development
• Knowledge of MVC's will add advantage
• Analytical & Problem solving skills
• Ability to work collectively towards team goals
• Responsible & Self starter who takes initiative
• Professionalism and team handling skills
• Good communication skills in verbal and written
• Understands the software development life-cycle process and a good team player
  
  Responsibilities and Duties

As a Full stack developer, you are expected to deliver end to end assigned task. Primarily you would be working on JavaScript, ReactJS, Redux, Node JS, HTML, CSS and taking care of API integration.

Who we are:

We are leading CMMI Level 3 global organization. We enjoyed a stable leadership since its inception in the Silicon Valley, California in 1996. We have expanded from a single location to current presence in 5 global cities with round-the-clock connectivity.

Since inception, the driving core values inculcated by our founder, management team and investors have been the ongoing guiding force.

We emerged as a leading custom software development organization, spread across the globe. We made business easier and more profitable for varied small to medium size projects. As a technology partner, we deliver solutions in line with your business goals. With 2000+ happy customer base, vast experience of 20+ years, backed by offices in the US, Australia and India, providing next-door assistance and a round-the-clock connectivity. Our software solutions cover all major industries such as healthcare, digital enterprises, business automation and IT services, highlighting our expertise in Microsoft open source platform, mobile platforms and new technologies.

 To know more about we visit http://www.smartdatainc.com">http://www.smartdatainc.com

About You:

Should build interactive consumer data from multiple systems and restfully abstract to the UI through a Node.js backend.

• Should define code architecture decisions to support a high-performance and scalable product with a minimal footprint
• Should address and improve any technical issues
• Should be good in communication skills and teamwork ability to work between different levels of developers.
• Should be able to work/handle projects single handed by own
• Should perform unit/per testing for creating a bug free solution.

You should possess:

• Experience of Node JS, Express JS, Mongo DB, Angular 2+.
• Knowledge of GIT, Jenkins tools or similar.
• Knowledge working with AWS (S3, EMR, EC2, RDS).
• Experience of Agile development and methodology.

Good to have:

•  Project management and deployment skills.
• Knowledge of Dockers and Kubernetes.

• Onsite experience.
• US business Visa.