Tech Lead - React JS (Web) and Node JS

Position Summary: Senior Software Engineer (Full Stack) We are seeking a highly skilled Senior Software Engineer to execute our strategy  preferably experienced in Financial Services/Procurement domain, to build a modern SaaS platform using latest technologies like ReactJS, Angular, Django, Python with Postgres and AWS as the platform. Athena, Lambda, Python, Spark and PowerBI. As a Full Stack Engineer, you’ll be responsible for designing, developing, and maintaining key features of our cloud-based SaaS product. You’ll work across the stack — from building rich client-side applications in ReactJS to crafting performant and secure APIs in Django. You will also play a key role in architectural decisions, DevOps integration, and driving engineering best practices across the team.

Technical Skills: Must Have: Expert – ReactJS, Django, Python, Shell Script, AWS, S3, Lambda, Postgres Significant work Experience – Jenkins, Power BI

 Responsibilities:

• Design and develop end-to-end web applications using ReactJS (frontend) and Python/Django (backend)

• Build and maintain RESTful APIs and integrate third-party services

• Work with PostgreSQL to model data and write efficient queries

• Implement scalable, secure, and maintainable backend services on AWS

• Collaborate with product managers, designers, and fellow engineers to deliver new features

• Write unit, integration, and end-to-end tests to ensure code quality and reliability

• Conduct code reviews, debug issues, and optimize performance across the stack

• Contribute to DevOps workflows including CI/CD pipelines, containerization, and monitoring Internal Use Only Qualifications/Experience:

Must have - 5–7 years of full stack development experience, preferably in a SaaS or product-first environment

- Strong proficiency with JavaScript, ReactJS, and component-based architecture

- Hands-on experience with Python and the Django web framework

- Solid understanding of PostgreSQL (or similar relational databases)

- Practical knowledge of AWS services (EC2, S3, RDS, Lambda, etc.)

- Familiarity with Git, CI/CD pipelines, Docker, and Linux-based environments

- Clear communication skills and a collaborative mindset

Good to have

- Experience with performance tuning in Django or PostgreSQL - Exposure to Infrastructure-as-Code (e.g., Terraform, CloudFormation) Nice to have 

- Understanding of frontend testing tools (Jest, Cypress) and backend testing strategies - Knowledge of security best practices for SaaS apps

Location: Bangalore 

Job Description

Position -   Full stack Developer

Location - Mumbai

    Experience - 2-5 Years 

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 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:

• Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth
• Ideate and develop new product features in collaboration with domain experts in healthcare and genomics 
• Develop state of the art enterprise standard front-end and backend services
• Develop cloud platform services based on container orchestration platform 
• Continuously embrace automation  for repetitive tasks
• Ensure application performance, uptime, and scale, maintaining high standards of code quality  by using clean coding principles and solid design patterns 
• Build robust tech modules  that are Unit Testable, Automating recurring tasks and processes  
• Engage effectively with team members and collaborate to upskill and unblock each other

Frontend Skills 

• HTML 5  
• CSS framework  (  LESS/ SASS / Tailwind ) 
• Es6 / Typescript 
• Electron app /Tauri)
• Component library  ( Bootstrap , material UI, Lit ) 
• Responsive web layout ( Flex layout , Grid layout ) 
• Package manager --> yarn-/ npm / turbo
• Build tools - > (Vite/Webpack/Parcel)
• Frameworks -- > React  with Redux of Mobx / Next JS
• Design patterns 
• Testing - JEST / MOCHA / JASMINE / Cypress)
• Functional  Programming concepts  
• Scripting  ( powershell , bash , python )

Backend Skills 

• Nodejs - Express / NEST JS 
• Python /  Rust
• REST API 
• SOLID Design Principles
• Database (postgresql / mysql / redis /  cassandra / mongodb ) 
• Caching  ( Redis ) 
• Container Technology  ( Docker / Kubernetes )  
• Cloud ( azure , aws , openshift, google cloud) 
• Version  Control - GIT 
• GITOPS 
• Automation ( terraform , ansible ) 

Cloud  Skills 

• Object storage
• VPC   concepts 
• Containerize Deployment
• Serverless architecture 

Other  Skills 

• Innovation and thought leadership
• UI - UX design skills  
• Interest in in learning new tools, languages, workflows, and philosophies to grow
• Communication 

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

• Lead the delivery of high quality, innovative, flexible and scalable technical solutions that meet business requirements.
• Design, Develop, Test and maintain software applications.
• Perform hands-on coding and provide thoughtful code reviews.
• Demonstrate ability to work within an agile team as well as collaborate with many other teams on design and implementation strategies.
• Follow SCRUM Agile Development methodology
• Problem Solving and ability to present ideas - Self-motivated, Open-minded, User Focused, Adaptive.
• Generate guidelines for other web designers to match visual design intent.
• Experience in building web application using ReactJS as the frontend framework.
• Expertise in using JavaScript framework.
• Have worked on REST client and WebSockets
• Be able to write Unit tests using a framework like Jasmine, Enzyme etc.
• Have experience in using any of the Build scripts.
• Proficient understanding of GitHub or other version control systems
• Strong programming basics, with a clear understanding of Object-Oriented and Functional programming.
• Expert in developing backend application with RESTful API's Using Rest Framework
• Understanding creation of website layout/user interfaces by using standard HTML5, CSS3, jQuery.
• Experience in Bootstrap4 or CSS pre-processor like Less or Sass is desirable.
• Low-Latency UI, Page optimization, and bundle build + caching.

Your Day-to-Day Role:

• Design and implement web applications from initial concept, architecture design, to completed, operational software.
• Lead complex engineering tasks where you’ll act as the technical authority.
• Contribute to code reviews and continuous integration.
• Adapt and apply cutting edge technologies.
• Collaborate with other engineers, designers, and product owners to define elegant customer solutions.
• Ensure robustness by writing automation tests for your code.

What Are We Looking For:

At least 3 years of professional experience in Fullstack development.

Mandatory Technical Skills

• Robust experience in MERN Stack (MongoDB, ExpressJS, ReactJS, NodeJS). Expertise in ReactJS, Redux, HTML, CSS.
• Proficiency in Javascript (ES6) and TypeScript.
• Hands-on experience in Socket Implementation.
• Solid understanding of GIT and its workflows.

Good to Have Skills (Optional)

• Familiarity with Material UI.
• Experience with HTML Canvas APIs (Ex: KonvaJS for canvas drawing).
• Basic understanding of AWS services (S3, Redis, Lambda, Messaging services, etc.). 

JOB  Description

1. Minimum 5 years of development experience with any full stack framework (except Java based)
2. Experience in designing effective data structures and algorithms
3. Experience with sql and no-sql databases and designs
4. In-depth understanding of javascript concepts and one front-end framework
5. Experience with version control and project management tools
6. Experience in developing and consuming REST web services.
7. excellent oral and written communication (english + 1 local language)
8. analytical and problem-solving skills
9. familiarity with any cloud service provider - aws/digital ocean/azure

Roles and Responsibilities

1. requirement gathering and proving
2. feasibility analysis
3. estimations & planning
4. prepare and maintain relevant documentation
5. coding, debugging, testing
6. benchmarking and performance upkeep
7. deployment & maintenance

Signs you would be a good fit

1. you enjoy crafting elegant, well-tested solutions, not just delivering working code
2. you have logical and well-researched opinions on existing and new technologies, and relish the learnings and challenges of working on different platforms and products
3. you have an entrepreneurial mindset
4. you are a quick learner with proven reasoning skills
5. you explore beyond your resume

About Eloquent Studio Pvt Ltd

Team of 1-10 people

Located in Pune, Maharashtra, India

• 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.

• Work with data science teams ,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 software
• Capable to handle the individual module / Project

• 2-5 years of relevant experience as a Full Stack Developer or similar role
• Experience developing Web based,desktop and mobile applications
• Familiarity with common stacks
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery etc).
•  Knowledge of multiple back-end languages (e.g. Java, Python,C#) and JavaScript frameworks (e.g. Angular, React, Node.js)
• Experience in React.js .
• Experience in Python Django Framework .
• Familiarity with databases (e.g. MySQL,Postgresql, MongoDB), web servers (e.g.Apache) and UI/UX design .
• Familiarity with Cloud services like AWS, GCP.
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• An analytical mind