Backend Engineer at TestMu AI (Formely LambdaTest) · Remote, Noida · 2 - 5 years · ₹6L - ₹20L / yr · Raised funding · Remote friendly · Posted 27 Oct 2022

At LambdaTest, We help developers and testers fix their applications across a combination of 2000+ browsers and Operating Systems by providing a complete cross-browser ecosystem on the cloud. As Backend Developer You will work with other Developers throughout the Software Development Life Cycle.
You will join a dynamic and fast-paced environment and work with cross-functional teams to design, build and roll out product that deliver the company’s vision and strategy.
What’s the Opportunity?
- As a hands-on engineering professional, you'll stay on top of the details and will be more focused on building a better, more efficient program and creating the best user experience and
- Support and collaborate with our service engineers in getting to the bottom of issues and come up with robust solutions.
- Produce high quality software that is unit tested, code reviewed, and checked in regularly for continuous integration.
- Participate in a culture of code reviews, writing tech specs, and collaborating closely with other people.
- Design distributed systems using micro services architecture would be plus.
- Implementing high performance and non-blocking systems to serve traffic heavy SaaS based product.
Requirements and qualifications-
- Bachelor's degree in Computer Science or equivalent combination of technical education with 2-4 Years of work experience.
- Experience with one or more general purpose programming languages, including but not limited to:Python, Golang, NodeJs
- A solid understanding of software construction
- The ability to naturally follow good development practices like test automation, CI/CD, source version control, etc.

About TestMu AI (Formely LambdaTest)
About
TestMu AI (formerly LambdaTest) is the world’s first full-stack Agentic AI Quality Engineering Platform.
We built TestMu AI for a reality where software is written by AI and must be shipped at machine speed.
Tech stack
Connect with the team
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Nature of Assignment
• We are looking for an experienced Senior Software Engineer – Backend Development to develop and enhance enterprise-grade scientific and workflow-driven software solutions. The role requires strong technical expertise in Python-based backend
development, API design, microservices, and modern software engineering practices.
• As a senior member of the engineering team, you will own the design, development, testing, and delivery of complex software components while collaborating closely with Product Management, Quality Engineering, Front-End Development, DevOps, and global engineering teams. The ideal candidate is passionate about building high-quality software, solving complex technical problems, and delivering reliable, maintainable, and scalable solutions.
Key Responsibilities
• Design, develop, and maintain scalable, secure, and high-performance backend applications using Python, FastAPI, and Uvicorn.
• Design and implement RESTful APIs, Backend-for-Frontend (BFF) services, and microservices that support complex business workflows and enterprise integrations.
• Drive modernization initiatives by refactoring legacy applications into modular, cloudready, service-oriented architectures.
• Implement robust business logic, validation, exception handling, asynchronous processing, data persistence, reporting, and workflow orchestration following industry best practices.
• Ensure secure coding practices by applying web application security principles, authentication and authorization standards, and vulnerability mitigation techniques.
• Own end-to-end delivery of features from requirement analysis and technical design through development, testing, deployment, and production support.
• Analyze, troubleshoot, and resolve complex product, integration, and production issues using logs, debugging tools, and root-cause analysis techniques.
• Develop comprehensive unit, integration, API, and regression tests to ensure software quality and reliability.
• Support CI/CD processes, deployment validation, release readiness, and environment verification activities.
• Contribute to technical documentation, API specifications, and knowledge-sharing initiatives.
• Collaborate closely with Product Management, UI teams, QA, DevOps, and Architecture teams to deliver high-quality software solutions.
• Mentor junior engineersthrough code reviews, technical guidance, and knowledge sharing.
Qualification/s
• Bachelor’s/master’s degree in computer science, Software Engineering, Information Technology, or a related discipline.
Technical Expertise
• Strong hands-on software development experience in Python backend development.
• Extensive experience developing REST APIs using FastAPI, Uvicorn, and modern Python ecosystem frameworks.
• Strong understanding of microservices, distributed systems, API-first design, and Backend-for-Frontend (BFF) architecture.
• Proficiency in Object-Oriented Programming (OOP), SOLID principles, design patterns, and clean code practices.
• Solid experience in asynchronous programming, dependency injection, API validation, exception handling, and performance optimization.
• Strong knowledge of web application security including OAuth2, JWT, OpenID Connect, SSO, secure coding practices, OWASP principles, and vulnerability remediation.
• Strong knowledge in Logging, Monitoring & Troubleshooting – Production support, observability, performance tuning, and root-cause analysis.
• Hands-on experience with Git, branch management strategies, pull requests, and collaborative development workflows.
• Experience building and maintaining CI/CD pipelines using modern DevOps tools and automated release processes.
• Hands-on experience in testing frameworks such as PyTest and automation of units, integration, API, and regression testing.
• Experience with SQL /NoSQL databases, data modeling, query optimization, and backend data management.
• Strong debugging, analytical, and problem-solving skills with the ability to diagnose issues across applications, infrastructure, and deployment layers.
• Experience independently leading technical initiatives and delivering production grade software solutions
• Excellent collaboration and communication skills within cross-functional Agile teams
About Tamasha
Tamasha is building next-generation live, social, and real-time consumer
experiences across gaming, audio, video, and interactive platforms. Our backend
systems power millions of real-time interactions, low-latency data flows, and high
throughput event-driven services.
Role Overview
As a Software Development Engineer III (Backend), you will operate as a senior
individual contributor owning mission-critical backend systems. You will design
scalable architectures, solve complex distributed systems problems, and influence
engineering standards across teams.
Roles & Responsibilities
Own backend systems end-to-end, from design and implementation to
production reliability and long-term evolution.
Design scalable, fault-tolerant, and low-latency backend architectures for real
time and event-driven use cases.
Lead system design decisions including data models, service boundaries, async
workflows, and scalability strategies.
Build and operate high-throughput services handling millions of events, requests,
or messages per day.
Own reliability metrics such as p95/p99 latency, uptime, error budgets, and
participate in incident resolution and post-mortems.
Drive architectural migrations including monolith to microservices and
synchronous to asynchronous flows.
Collaborate with product, frontend, and data teams to translate complex
requirements into robust backend solutions.
Improve developer productivity by contributing to internal platforms, tooling,
CI/CD pipelines, and coding standards.
Mentor engineers through design reviews, code reviews, and technical guidance
without direct people management.
Proactively identify performance bottlenecks, cost inefficiencies, and scalability
risks and resolve them at the system level.
Tech Stack
Backend: Node.js (NestJS / Express), Golang, Java
Databases: PostgreSQL, MySQL, MongoDB, Redis
Messaging & Async: Kafka, SQS, RabbitMQ, Pub/Sub
Real-time: WebSockets, Server-Sent Events
Cloud & Infra: AWS / GCP, Docker, Kubernetes
Observability: Prometheus, Grafana, OpenTelemetry
What We’re Looking For
• 5+ years of backend engineering experience
• Proven ownership of production systems at scale
• Strong understanding of distributed systems and async architectures
• Experience handling production incidents and system reliability
• Ability to independently design and evolve backend systems
Job Location: Sewri, Mumbai, Maharashtra
Required experience:
- Minimum 2 year of experience in Web & Backend Development using Python
Overview
We are looking for Python developers with a strong understanding of object orientation and experience in web and backend development. Experience with Analytical algorithms and mathematical calculations using libraries such as Numpy and Pandas are a must. Experience in some form of Machine Learning. We require candidates who have working experience using Django Framework
Key Skills required (Items in Bold are mandatory keywords) :
- Proficiency in Python 3.x based web and backend development
- Solid understanding of Python concepts
- Experience with some form of Machine Learning (ML)
- Experience in using libraries such as Numpy and Pandas
- Some form of experience with NLP and Deep Learning using any of Pytorch, Tensorflow, Keras, Scikit-learn or similar
- Hands on experience with RDBMS such as Postgres or MySQL
- Experience building REST APIs using DRF or Flask
- Comfort with Git repositories, branching and deployment using Git
- Working experience with Docker
- Basic working knowledge of ReactJs
- Experience in deploying Django applications to AWS,Digital Ocean or Heroku
KRAs includes:
- Understanding the scope of work
- Understanding and adopting the current internal development workflow and processes
- Understanding client requirements as communicated by the project manager
- Arriving on timelines for projects, either independently or as a part of a team
- Executing projects either independently or as a part of a team
- Developing products and projects using Python
- Writing code to collect and mathematically analyse large volumes of data.
- Creating backend modules in Python by building or reutilizing existing modules in a manner so as to
provide optimal deliveries on time
- Writing Scalable, maintainable code
- Building secured REST APIs
- Setting up batch task processing environments using Celery
- Unit testing prepared modules
- Bug fixing issues as reported by the QA team
- Optimization and performance tuning of code
Job Description:
|
Key Responsibility Areas: |
· Perform validation and verification testing and debud code. · Work collaboratively with others to achieve goals · Experience working in an agile environment |
|
Required Skills: |
· Experience in implementing Object-Oriented Python, Django. · Good understanding on Django ORM. · Experienced in interfacing with *third party API’s using REST · Worked with varieties of Relational Databases (RDBMS) like SQLite, MySQL, PostgreSQL. · Experience in Version Control with Git and Bitbucket. · Experience with JIRA the development progress and tracking deadlines of the project · Experience with web applications using technologies like HTML5,CSS, JavaScript, JQuery, AJAX, Angularjs,Reactjs and Bootstrap,XML. · Knowledge in Pandas, Numpy will be addons |
|
Qualification |
Bachelor of Engineering in Computer Science , MCA |
Senior Web Backend Developer
Company Overview:
It is a US based startup founded in 2018 to build an edge data platform for the autonomous world.Rich data in large volumes is getting collected at the edge (outside a data center) in use cases like autonomous vehicles, smart manufacturing, satellite imagery, smart retail, smart agriculture etc.These datasets are characterized by being unstructured (images/videos), large size (Petabytes per month), distributed (across edge, on-prem and cloud) and form the input for training AI models to get to higher degrees of automation. It is engaged with building products that solve these unique challenges and be at the forefront of this edge data revolution.
The company is backed by prominent VCs and has it’s entire software engineering team based out of India and provides ample opportunities for from-scratch design and development.
Role:
This role is an individual contributor role with key responsibilities in developing web server backends for Akridata management plane software that provides a ‘single pane of glass’ for users to manage assets, specify and monitor large volume data pipelines at scale involving 10s of petabytes of data.
This role involves:
- Working with tech leads and the rest of the team on the feature design activities and picking appropriate tools and techniques for implementation.
- Be a hands-on developer able to independently make correct implement choices, follow sound development practices to ensure an enterprise grade application.
- Guide and mentor junior team members.
What we are looking for:
- A Bachelor’s or Master’s degree in computer science with strong CS fundamentals and problem-solving.
- 5+ years of hands-on experience with software development with 3+ years on web backend development.
- A good understanding of backend application interactions with relational databases like MySQL, Postgres etc
- Knowledge of web server development frameworks preferably on Python.
- Enthusiastic to work in a dynamic, fast paced startup environment.
Good to have:
- Hands-on experience with designing database schema and implementing and debugging SQL queries for optimal performance for large datasets
- Experience working with applications deployed on Kubernetes clusters.
- Experience with working on a product from early stages of it’s development typically in a startup environment.
We are looking for a Node.js Developer responsible for managing the interchange of data
between the server and the users. Your primary focus will be the development of all server-side
logic, definition, and maintenance of the central database, and ensuring high performance and
responsiveness to requests from the front-end. You will also be responsible for integrating the
front-end elements built by your co-workers into the application. Therefore, a basic
understanding of front-end technologies is necessary as well.
Must-Have:
● Strong proficiency with JavaScript.
● Hands-on experience with HTML, CSS, and AJAX.
● Knowledge of Node.js and frameworks available for it (such as Express, StrongLoop, etc
depending on your technology stack).
● Understanding the nature of asynchronous programming and its quirks and
workarounds.
● Good understanding of server-side templating languages. (such as Jade, EJS, etc
depending on your technology stack)
● Development experience designing object-oriented JavaScript and SVG.
● User authentication and authorization between multiple systems, servers, and
environments.
● Integration of multiple data sources and databases into one system.
● Understanding fundamental design principles behind a scalable application.
● Understanding differences between multiple delivery platforms, such as mobile vs.
desktop, and optimizing output to match the specific platform.
Good to have:
● Proficient understanding of code versioning tools, such as Git.
● Understanding accessibility and security compliance.
● Typescript and Mongo DB knowledge.
● Knowledge of REST & GRPC.
● Understanding of containerization (Docker).
Responsibilities:
● Writing reusable, testable, and efficient code.
● Writing API Documentation.
● Design and implementation of low-latency, high-availability, and performant
applications.
● Implementation of security and data protection.
● Integration of data storage solutions (may include databases, key-value stores, blob
stores, etc.).
● Integration of user-facing elements developed by front-end developers with server-side
logic.
Desired candidates must have 2-7 years experience as NodeJs Developer. If the candidate is not able to relocate to Gurgaon then we can also provide permanent Work from home for this position.
Roles and responsibilities:
- Responsible for understanding functional and business requirements and translate them into effective code
- Provide support till deployment of code into production.
- Ownership for ensuring code optimization, problem diagnosis, and on-time delivery
- Implement solutions as per the pre-defined framework /guidelines and adherence to processes
- Finding an optimal solution for the problem statement
- Conduct peer code review.
What candidate should know about:
- Excellent hands-on experience with Node.Js, Express.Js, JavaScript
- Understanding the nature of asynchronous programming and its quirks and workarounds
- Excellent hands-on experience with MongoDB, Mongo aggregation, MySQL
- Ability to build REST services, Authentications, MVC applications
- Excellent Object Oriented Programming skills and ability to write modular, secure, scalable, and maintainable code
- Experience with Elastic Search, Redis.
- Knowledge about AWS components (S3, EC2, Cloudfront, Redis Clusters, etc.)
- Self-learning abilities are required
- Familiarity with upcoming new technologies is a strong plus
- Design and develop cloud native enterprise applications
- Define and establish conventions, standards and best practices for the SDLC process and ensure that quality control is of paramount importance at each step of the development life cycle
- Develop reusable frameworks and libraries that can drastically accelerate new application development in the future
- Participate in the requirement analysis and gathering process and also perform sit-withs with business teams to ensure there is full clarity of the problem statement
- Actively engage wih infrastructure team and take ownership of DevOps processes to ensure that build and deployment processes are efficient and optimal.
- Actively engage with project stakeholders to ensure all are in sync with the progress, risks and issues
- Quickly learn and adopt cutting edge technologies to help keep the org ahead of the curve









