MERN Stack Developer ( Exp: 3 to 5 Years )

About the Company

The client is revolutionising the way businesses operate through cutting-edge technological solutions. Their focus is on developing intelligent agents and agentic workflows that automate processes and eliminate the need for human effort wherever possible. By leveraging

advanced AI and machine learning, they create systems that enhance productivity and drive efficiency.

Their expertise extends to the fintech, healthcare and medical technology sectors, where they develop innovative solutions that improve patient outcomes and streamline medical operations.

From medical devices to healthcare platforms, their work sits at the intersection of technology and medicine, pushing the boundaries of what's possible. The team is dedicated to continuous learning and growth, ensuring the team members are always at the forefront of the tech landscape.

About the Role

This is a senior, hands-on engineering role at the heart of our product team. You will be one of the most technical people in the room — setting the architecture for our real-time voice AI

agents and building the hardest parts of it yourself. From the systems that power live conversations to the interfaces our clients rely on, you will own how the product is engineered end to end.

We are looking for a genuine lead full-stack engineer with the depth to make architecture decisions that hold up as we scale, and the appetite to still be in the code every day. You should be as comfortable designing the backend services behind a live voice agent as you are shaping a clean interface on top of them — and comfortable being the person others turn to when something is hard.

You will work directly with the founder and product leadership on a fast-moving product, with real influence over technical direction. This is a role for someone who wants ownership at the level of "how the whole thing is built," not just individual features — and who raises the bar for

everyone around them.

What You'll Own

Set the technical direction

• Own the architecture of our core systems — the real-time voice agents, backend
• services, data and APIs — making the decisions that keep the product fast, reliable and scalable as it grows.
• Lead the hardest engineering problems and solve them personally.
• Establish engineering standards — code quality, review practices, testing and technical patterns that the team builds to.
• Drive technical strategy with the founder and product leadership — shaping the roadmap, flagging risk early, and turning product ambition into a sound technical plan.

Build the product end to end

• Design, build and ship features across the stack — backend services, APIs and front-ends — owning them from idea to production.
• Build the client-facing surfaces — dashboards, review tools and configuration interfaces that let our clients run and trust the product.
• Design and evolve the data models and APIs that hold up as we scale across clients.

Make it reliable and fast

• Own production quality — put the monitoring and alerting in place so issues are caught before clients feel them, and performance stays within target.
• Care about performance — find and fix bottlenecks across the stack.
• Build for correctness — put the testing and evaluation in place that keeps the product behaving predictably as it changes.

Lead through the team

• Mentor and grow engineers — through code review, pairing, and setting a technical example others learn from.
• Multiply the team's output — unblock others and lift the overall quality of the codebase.
• Take features from ambiguity to done — turn a rough product goal into a shipped, working capability with minimal hand-holding, and help others do the same.

What We're Looking For

• 8+ years of professional software engineering experience, with significant depth across both backend and frontend and a track record of owning systems, not just features.
• Strong backend engineering, ideally in Python — building and scaling production services and APIs.
• Strong frontend engineering with a modern framework such as React — able to architect and build polished, responsive interfaces independently.
• Proven architecture and system-design ability — you have designed systems that scaled, and can reason clearly about trade-offs.
• Solid fundamentals across APIs, databases and cloud infrastructure.
• Experience building real-time and/or AI-powered products — or clear, demonstrable ability to lead in this area.
• A history of technical leadership — setting standards, mentoring engineers, and being trusted with the hardest problems — while remaining hands-on.
• Excellent communication and a genuine ownership mindset — someone who can be handed an ambiguous, high-stakes problem and be trusted to see it through.

Nice to Have

• Experience working with AI / large language models in production.
• Experience with voice or other real-time products.
• Exposure to healthcare, fintech, or other regulated / high-stakes domains.
• Experience as an early or senior engineer in a startup, where you set direction and wore many hats.

Position – Python Developer

Location – Navi Mumbai

Who are we

Based out of IIT Bombay, HaystackAnalytics is a HealthTech company creating clinical genomics products, which enable diagnostic labs and hospitals to offer accurate and personalized diagnostics. Supported by India's most respected science agencies (DST, BIRAC, DBT), we created and launched a portfolio of products to offer genomics in infectious diseases. Our genomics-based diagnostic solution for Tuberculosis was recognized as one of the top innovations supported by BIRAC in the past 10 years, and was launched by the Prime Minister of India in the BIRAC Showcase event in Delhi, 2022.

Objectives of this Role:

• Design and implement efficient, scalable backend services using Python.
• Work closely with healthcare domain experts to create innovative and accurate diagnostics solutions.
• Build APIs, services, and scripts to support data processing pipelines and front-end applications.
• Automate recurring tasks and ensure robust integration with cloud services.
• Maintain high standards of software quality and performance using clean coding principles and testing practices.
• Collaborate within the team to upskill and unblock each other for faster and better outcomes.

Primary Skills – Python Development

• Proficient in Python 3 and its ecosystem
• Frameworks: Flask / Django / FastAPI
• RESTful API development
• Understanding of OOPs and SOLID design principles
• Asynchronous programming (asyncio, aiohttp)
• Experience with task queues (Celery, RQ)

Database & Storage

• Relational Databases: PostgreSQL / MySQL
• NoSQL: MongoDB / Redis / Cassandra
• ORM Tools: SQLAlchemy / Django ORM

Testing & Automation

• Unit Testing: PyTest / unittest
• Automation tools: Ansible / Terraform (good to have)
• CI/CD pipelines

DevOps & Cloud

• Docker, Kubernetes (basic knowledge expected)
• Cloud platforms: AWS / Azure / GCP
• GIT and GitOps workflows
• Familiarity with containerized deployment & serverless architecture

Bonus Skills

• Data handling libraries: Pandas / NumPy
• Experience with scripting: Bash / PowerShell
• Functional programming concepts
• Familiarity with front-end integration (REST API usage, JSON handling)

 Other Skills

• Innovation and thought leadership
• Interest in learning new tools, languages, workflows
• Strong communication and collaboration skills
• Basic understanding of UI/UX principles

To know more about us – https://haystackanalytics.in

Job Overview: We are looking for a highly skilled and experienced Node.js Developer to join our team. The ideal candidate will have over 5 years of experience in developing scalable, high-performance backend applications using Node.js and related technologies. You will work closely with cross-functional teams to design, develop, and deploy robust solutions.

Key Responsibilities:

· Develop, maintain, and optimize server-side applications using VueJs, Node.js and Express.js.

· Design and implement scalable RESTful APIs and GraphQL APIs.

· Work with databases such as MongoDB, PostgreSQL, or MySQL.

· Ensure the security, performance, and responsiveness of applications.

· Collaborate with front-end developers, UX designers, and product managers.

· Implement automated testing and continuous integration.

· Debug and optimize existing code for performance improvements.

·  Stay updated with the latest trends and best practices in Node.js development.

Required Skills & Qualifications:

· 5+ years of experience in backend development using Node.js.

· Proficiency in JavaScript & TypeScript.

· Strong knowledge of Express.js, Nest.js, or similar frameworks.

· Experience with microservices architecture and cloud platforms (AWS, Azure, GCP).

· Expertise in database technologies such as MongoDB, PostgreSQL, or MySQL.

· Familiarity with Docker, Kubernetes, and CI/CD pipelines.

· Experience with authentication and security best practices (JWT, OAuth, etc.).

· Strong debugging and performance optimization skills.

·  Ability to work in an agile environment and collaborate with cross-functional teams.

Preferred Qualifications:

· Experience with message queues (RabbitMQ, Kafka, etc.).

· Knowledge of DevOps practices and infrastructure as code (Terraform, Ansible).

· Familiarity with front-end technologies such as VueJs or React.

· Contributions to open-source projects or a strong GitHub portfolio.

We are looking for a skilled Fullstack Tech Lead with extensive experience in NestJS and NextJS to join our team. The ideal candidate should have a strong background in full-stack development, including building and deploying complex web applications. If you are a proactive and self-motivated individual with a passion for developing high-quality software, we would love to hear from you!

Key Responsibilities:

• Lead the development team in building and maintaining complex web applications using NestJS and NextJS.

• Architect and design scalable, secure, and maintainable systems.

• Collaborate with cross-functional teams to design, develop and deploy new features.

• Conduct code reviews and ensure the team follows best practices.

• Mentor junior developers and help them grow their skills.

• Stay up-to-date with the latest trends and technologies in web development.

Requirements:

• Proven experience as a Fullstack Developer or similar role, with a minimum of 5 years of experience.

• Strong experience with NestJS and NextJS.

• Strong experience in front-end technologies such as ReactJS, HTML, CSS, and JavaScript.

• Strong experience in backend technologies such as NodeJS and RESTful APIs.

• Experience in database technologies such as MongoDB and PostgreSQL.

• Familiarity with containerization technologies such as Docker and Kubernetes.

• Good understanding of Agile methodologies and experience in working in Agile environments.

• Excellent problem-solving and analytical skills.

• Strong leadership and communication skills.

• Bachelor's degree in Computer Science, Engineering or a related field.

• Bachelor's degree in computer science or equivalent experience
• 2+ years of experience in software engineering.
• Experience with building B2B and consumer quality products, enabling business capability and objectives through technology.
• Strong cloud infrastructure experience with AWS.
• Experience in engineering practices such as code refactoring, design patterns, design driven development, continuous integration, building highly scalable applications and application security.
• Experience working with a development team using Agile methodology.
• Experience in container technologies like Docker/Kubernetes a plus.
• Hands-on skills working with SQL and No-SQL databases
  Broad experience across the following application development technologies and in depth skills with at least one: NodeJS, React, GraphQL,Python, R, Java/C++ and/or other open source application development frameworks.
• Ability to strategically balance test coverage, documentation and timelines (API/ Unit testing).
• Strong analytical and problem-solving skills paired with the ability to develop creative and efficient solutions.
• Able to work under competing priorities, manage expectations effectively and support the team under pressure; distinct user focus and quality mindset.

• High School diploma or GED required 
• A minimum of 5 years’ experience designing and building scalable web based applications 
• Experience with RESTful web services, Java/Spring framework, NodeJS applications, React & Vue Frameworks 
• Strong relational database modeling and SQL experience (Oracle, MSSQL)f 
• Solid knowledge of testing principle and ability to build comprehensive test suite  
• Demonstrated UI design and UX sensibilities 
• Experience in scripting against Windows/Linux i.e. PowerShell, VB or Unix Shell Script, Python  
• Ability to coordinate the release/deployment process and versioning, code, configuration management 
• Experience with Git/Bitbucket and Opensource Tools and Agile methodologies 
• Experience leading software developers on development best practices as a technical lead 
• Experience with using JIRA (for defect tracking and for ITSM ticketing with Incident/Problem/Change)  

Web / FE design

VueJS

Bootstrap

Java Script

Node.JS

Python

SQL Server

Azure

Agile

• 2+ years of experience participating in the delivery of technology services.
• A proven ability to learn new applications & innovate in technology
• Strong Experience in technologies like Node, Webservices and Microservices
• Experience with cloud components and services and containerization technologies is desirable
• Exposure to ReactJS mandatory
• Experience working with multiple types of datastores: Mongo DB, SQL
• Experience in integrating, designing and developing solutions is desirable
• Experience with CI/CD and TDD is desirable
• Frameworks - Express , Hapi , feathers
• Strong knowledge in Javascript

The Senior Full Stack Developer is responsible for bringing the platform to the next level and ensuring the stability of the core platform. S/he will report directly to our GM and will have the opportunity to participate in the next phase of growth at Delishop, developing the platform and adapting it to meet the needs of new verticals. S/he will have flexibility and responsibilities from day one with expectations to contribute to the growth of the company by bringing new ideas and solutions to the table.

Duties:

• Coordinate project work with junior staff under the supervision of the GM.
• Act as a technical lead to the junior staff
• Lead production troubleshooting.
• Participate in the ideation of how to optimise the platform.

Requirements:

• At least 4-5 years of working experience in development.
• Very good knowledge of ReactJS including workflows (eg: redux)
• Good knowledge of the LAMP stack (Linux, Apache/Nginx, MySQL, PHP).
• Experience creating and using APIs (REST)
• Solid experience with ExpressJS/lambda and other backend technologies
• Understand of token and authentication mechanisms (eg: JWT)
• Experience with AWS, Command line tools and Auto-Scaling Environments.
• Comfortable with GIT (CLI), including branching and merging.

Desirable Qualifications:

• Eager to try out and learn about new technologies and approaches every day.
• Attention to detail, problem solving and teambuilding skills.
• Able and confident to communicate in English with colleagues and clients.
• Curious about best practices and adopting them;
• Experience with leading development teams and interacting with clients.
• Works hard, party harder.

Compensation

• USD 1000-1200 per month
• Working Hours: TBD