Senior Backend Engineer

Job Description: Senior Full-Stack Engineer (MERN + Python )

Location: Noida (Onsite)

Experience: 5 to 10 years

We are hiring a Senior Full-Stack Engineer with proven expertise in MERN technologies and Python backend frameworks to deliver scalable, efficient, and maintainable software solutions. You will design and build web applications and microservices, leveraging FastAPI and advanced asynchronous programming techniques to ensure high performance and reliability.

Key Responsibilities:

• Develop and maintain web applications using the MERN stack alongside Python backend microservices.
• Build efficient and scalable APIs with Python frameworks like FastAPI and Flask, utilizing AsyncIO, multithreading, and multiprocessing for optimal performance.
• Lead architecture and technical decisions spanning both MERN frontend and Python microservices backend.
• Collaborate with UX/UI designers to create intuitive and responsive user interfaces.
• Mentor junior developers and conduct code reviews to ensure adherence to best practices.
• Manage and optimize databases such as MongoDB and PostgreSQL for application and microservices needs.
• Deploy, monitor, and maintain applications and microservices on AWS cloud infrastructure (EC2, Lambda, S3, RDS).
• Implement CI/CD pipelines to automate integration and deployment processes.
• Participate in Agile development practices including sprint planning and retrospectives.
• Ensure application scalability, security, and performance across frontend and backend systems.
• Design cloud-native microservices architectures focused on high availability and fault tolerance.

Required Skills and Experience:

• Strong hands-on experience with the MERN stack: MongoDB, Express.js, React.js, Node.js.
• Proven Python backend development expertise with FastAPI and Flask.
• Deep understanding of asynchronous programming using AsyncIO, multithreading, and multiprocessing.
• Experience designing and developing microservices and RESTful/GraphQL APIs.
• Skilled in database design and optimization for MongoDB and PostgreSQL.
• Familiar with AWS services such as EC2, Lambda, S3, and RDS.
• Experience with Git, CI/CD tools, and automated testing/deployment workflows.
• Ability to lead teams, mentor developers, and make key technical decisions.
• Strong problem-solving, debugging, and communication skills.
• Comfortable working in Agile environments and collaborating cross-functionally.

Founding Engineer - LITMAS

About LITMAS

LITMAS is revolutionizing litigation with the first AI-powered platform built specifically for elite litigators. We're transforming how attorneys research, strategize, draft, and win cases by combining comprehensive case repositories with cutting-edge AI validation and workflow automation. We are a team incubated by experienced litigators, building the future of legal technology.

The Opportunity

We're seeking a Founding Engineer to join our core team and shape the technical foundation of LITMAS. This is a rare opportunity to build a category-defining product from the ground up, working directly with the founders to create technology that will transform the US litigation market.

As a founding engineer, you'll have significant ownership over our technical architecture, product decisions, and company culture. Your code will directly impact how thousands of attorneys practice law.

What You'll Do

• Architect and build core platform features using Python, Node.js, Next.js, React, and MongoDB
• Design and implement production-grade LLM systems with advanced tool usage, RAG pipelines, and agent architectures
• Build AI workflows that combine multiple tools for legal research, validation, and document analysis
• Create scalable RAG infrastructure to handle thousands of legal documents with high accuracy
• Implement AI tool chains to provide agents tool inputs
• Design intuitive interfaces that make complex legal workflows simple and powerful
• Own end-to-end features from conception through deployment and iteration
• Establish engineering best practices for AI systems including evaluation, monitoring, and safety
• Collaborate directly with founders on product strategy and technical roadmap

The Ideal Candidate

You're not just an AI engineer, you're someone who understands how to build reliable, production-grade AI systems that users can trust. You've wrestled with RAG accuracy, tool reliability, and LLM hallucinations in production. You know the difference between a demo and a system that handles real-world complexity. You're excited about applying AI to transform how legal professional’s work.

What We're Looking For

Must-Haves

• Deployed production-grade LLM applications with demonstrable experience in:
• Tool usage and function calling
• RAG (Retrieval-Augmented Generation) implementation at scale
• Agent architectures and multi-step reasoning
• Prompt engineering and optimization
• Knowledge of multiple LLM providers (OpenAI, Anthropic, Cohere, open-source models)
• Background in building AI evaluation and monitoring systems
• Experience with document processing and OCR technologies
• 3+ years of production experience with Node.js, Python, Next.js, and React
• Strong MongoDB expertise including schema design and optimization
• Experience with vector databases (Pinecone, Weaviate, Qdrant, or similar)
• Full-stack mindset with ability to own features from database to UI
• Track record of shipping complex web applications at scale
• Deep understanding of LLM limitations, hallucination prevention, and validation techniques

Tech Stack

• Backend: Node.js, Express, MongoDB
• Frontend: Next.js, React, TypeScript, Modern CSS
• AI/ML: LangChain/LlamaIndex, OpenAI/Anthropic APIs, vector databases, custom AI tools
• Additional: Document processing, search infrastructure, real-time collaboration

What We Offer

• Significant equity stake true ownership in the company you're building
• Competitive compensation commensurate with experience
• Direct impact your decisions shape the product and company
• Learning opportunity work with cutting-edge AI and legal technology
• Flexible work remote-first with a global team
• AI resources access to latest models and compute resources

Interview Process

One more thing: Our process includes deep technical interviews and fit conversations. As part of the evaluation, there will be an extensive take-home test that should expect to take at least 4-5 hours depending on your skill level. This allows us to see how you approach real problems similar to what you'll encounter at LITMAS.

Designation: Tech Lead

● Location: Bandra West, Mumbai, India

● Position Type: Full-time, Permanent

Company Description

Brown Living (www.brownliving.in) is a platform focused on making Sustainable Living Easy, Accessible, and Affordable. As India's first plastic-free marketplace, we promote a sustainable and earth-friendly lifestyle. Our team curates a wide range of everyday-use products that are

ethically sourced and promote minimal waste. We support artisan groups and sustainable brands dedicated to creating a positive environmental impact. Through our platform, we are building India's largest ecosystem for sustainable living and empowering artisans, women entrepreneurs, and innovators to combat plastic pollution.

Role Description

The Tech Lead is responsible for providing technical leadership and direction to the technology team. This role involves overseeing technology projects, setting the technology strategy, and ensuring the smooth operation of digital assets. The ideal candidate will have a strong technical

background and the ability to translate business requirements into technical solutions.

Key Responsibilities:

■ Lead and manage the technology team (currently outsourced).

■ Oversee all technology-related projects and initiatives, ensuring timely delivery and adherence to quality standards.

■ Develop and implement the technology strategy and roadmap aligned with business goals.

■ Manage the development, maintenance, and optimization of the website, e-commerce platform, and other digital assets.

■ Ensure technology solutions are scalable, reliable, secure, and compliant with industry standards.

■ Collaborate with cross-functional teams to understand their technology needs and provide effective solutions.

■ Stay up-to-date on emerging technologies and industry trends to identify opportunities for innovation.

Key Result Areas (KRAs):

● Successful delivery of technology projects within budget and timeline.

● Improved website and e-commerce platform performance and user experience.

● Enhanced system reliability, security, and scalability.

● Effective collaboration with cross-functional teams to meet business objectives.

● Development and implementation of a robust technology roadmap.

● Increased efficiency and productivity of the technology team.

Required Qualifications and Skills:

● Bachelor's degree in computer science engineering, or a related field.

● Proven experience in a technical lead role.

● Strong technical expertise in web development, e-commerce platforms, and related technologies.

● Ability to translate business requirements into technical solutions.

● Excellent project management and organizational skills.

● Strong leadership and team management abilities.

● Problem-solving and analytical skills.

● Ability to stay up-to-date with emerging technologies.

● Tech Stack:

○ Frontend: Angular 18

○ Backend: Nodejs

○ Database: MySQL

○ AWS: S3, ECS, Lambda etc

Note: This role offers an exciting opportunity for a young professional who is passionate about technology and making a positive impact in the sustainability space. Based in Mumbai, India, the successful candidate will join a collaborative and passionate team dedicated to driving innovation and positive change at Brown Living.

How to Apply:

Interested candidates can apply online via the job application form available here - https://docs.google.com/forms/d/e/1FAIpQLSdgb8MMrZX0STJb1Nt63jizdYccAxTQWbAmFAt4YcoAJBJlmg/viewform

Read More:

1. Website - https://brownliving.in/

2. About Brown Living’s Mission & Vision - https://brownliving.in/pages/about-us

3. Meet the Brown Living Team - https://brownliving.in/pages/our-team

4. Work with Us - https://brownliving.in/pages/work-with-us

5. The Brown Lens Curation Method - https://brownliving.in/pages/the-brown-lens

6. Brown Living’s Impact - https://brownliving.in/pages/our-impact-plastic-free-carbon-neutral-shopping

Roles and Responsibilities 

1) Understand client requirements and functionalities. 

2) Write well-designed, testable, efficient code. 

3) Responsible for solving complex technical issues. 

4) Ensure quality projects are delivered within defined timelines. 

5) Active involvement in client communication to understand functional requirements. 

6) Maintain high standards of quality for code, documentation and other deliverables. 

Required Skills 

1) Good experience in Angular

2) Hand on Node.JS./Express JS 

3) Database: MYSQL/MongoDB 

4) Experience in JavaScript, TypeScript. 

5)Good experience in HTML5, CSS3, JavaScript, Jquery 

6) Experience working in an Agile environment. 

7) Good communication skills.

Develop and maintain application documentation and coding standards that are clear, accurate and detailed. Troubleshoot .NET issues and provide debugging support as needed. Maintain communication with key players on development process and communicate complex technical information to non-technical audiences. Provide mentorship and support to other employees

·       Hands on Experience on HTML, jQuery, JavaScript, MongoDB, NoSQL, Azure/Google Cloud Components

·       HTML: Elements and attributes, HTML Structures

·       jQuery: Functions and events, class based, ID based and attributes-based events, effects, JSON serialization and deserialization, JSON data preparation, AJAX Calls, async functions‍

·       JavaScript: For Loops, Filters, JSON Data Mapping

·       Expert on C# (.Net Core & Asp.NET MVC) and MongoDB

What are we?

Llama is a purpose driven startup.

We help people build the inner skills that are critical to have for wellbeing and high performance today!

A unique mindfulness-based behaviour change platform for mental health through workplace wellbeing.

We are building a hybrid learning platform to cater to a broad spectrum of well-being needs by introducing contemplative wisdom practices into the workplace.

All Llamas have some terrific abilities! You will have…

• 1 - 2+ years of experience in full stack development.
• Strong understanding of HTML, CSS, JavaScript.
• Comfortable in working with WordPress, React/Vue, Python, and PHP.
• Worked with multiple of the UI libraries.
• Understanding of version control systems.
• Comfortable in switching different technologies both in front end and back end.
• Good understanding with different types of databases.
• Knows the best practices of the technology, worked on.
• Experienced in using Figma, canva or similar designing tools

All Llamas also have some terrific response-abilities!

For starters you will…

• Develop the current wordpress website.
• Develop the current product ecosystem.
• Co develop AI tools and different integrations for multiple platforms.
• Explore possible technologies to integrate in Llama’s Tech ecosystem.
• Contributes to the open source projects that we use in any form.
• Document the project as you build.
• Utilize Project management tools
• Create training resources for future team members

Responsibilities:

• Writing and reviewing great quality code.
• Understanding functional requirements thoroughly and analysing the client's needs in the context of the project.
• Envisioning the overall solution for defined functional and non-functional requirements, and being able to define technologies, patterns and frameworks to realize it.
• Determining and implementing design methodologies and tool sets.
• Enabling application development by coordinating requirements, schedules, and activities.
• Being able to lead/support UAT and production roll outs.
• Creating, understanding and validating WBS and estimated effort for given module/task, and being able to justify it.
• Addressing issues promptly, responding positively to setbacks and challenges with a mindset of continuous improvement.
• Giving constructive feedback to the team members and setting clear expectations.
• Helping the team in troubleshooting and resolving of complex bugs.
• Coming up with solutions to any issue that is raised during code/design review and being able to justify the decision taken.
• Carrying out POCs to make sure that suggested design/technologies meet the requirements.
• Passionate about building great solutions.
• Mentoring the team members to meet the client's needs and holding them accountable for high standards of delivery.
• Being able to understand and relate technology integration scenarios and be able to apply these learnings in complex troubleshooting scenarios.

• Relevant expertise in C#, . Net framework/. Net core, Web Services/WCF/Web API, ASP. Net/MVC. JavaScript, OO JavaScript (ES6 onwards), HTML5/CSS, Angular/React/VueJS, OOA and OOD Concepts, Serverside JS: NodeJS/Express.
• Experience in Relational Database: SQL Server/MySQL/Oracle, Cloud Platform: Amazon/Azure/Google Cloud.
• Experience in Testing Frameworks (Web): MSTest/NUnit/Jasmine/Karma/Mocha, Repositories: Git/SVN/TFS, CI/CD Tools: Jenkins/Grunt/Gitlab/Azure DevOps, Container Ecosystem: Docker/Kubernetes/Anthos.
• NoSQL DB: MongoDB/Cassandra/CouchDB/HBase/MarkLogic, Cloud Database: CosmosDB/ IBM DB2/SAP HANA/Amazon Aurora/DynamoDB.
• Knowledge of high-quality professional software engineering practices for agile software development cycle, including coding standards, code reviews, source control management, build processes, testing, and deployment.
• Fundamental knowledge of design patterns.
• Experience in communicating effectively with users, other technical teams, and management to collect requirements, describe software product features, and technical designs.
• Languages: C#, JavaScript, OO JavaScript (ES6 onwards).
• App Framework: . Net Framework/. Net Core.
• Web Framework: ASP. Net/MVC.
• Markups: HTML5/CSS.
• CSS Framework: Bootstrap/Foundation/Bulma.
• Frontend Framework: Angular 6 ( ) /React/VueJS.
• API Framework: WebServices/WCF/WebAPI.
• Relational Database: SQL Server/MySQL/Oracle.
• Cloud Platform: Amazon/Azure/Google Cloud.
• Testing Frameworks (Web): MSTest/NUnit/Jasmine/Karma/Mocha.
• Repositories: Git/SVN/TFS.