
Backend Developer
š Noida | š Full-Time | š§ Experience: 2ā3 Years
The Mission
We aren't building traditional backend systems ā we're powering the infrastructure behind Agentic Intelligence. TestMu AI is building the world's first AI-native platform where backend systems don't just serve requests, they enable autonomous decision-making, execution, and scale.
The name "TestMu" comes from our community conference. Our users and team aren't an audience ā they're the heartbeat of what we build. We believe AI augments human potential. It doesn't replace it.
You'll be building the core backend systems that power AI-driven workflows ā ensuring high performance, scalability, and reliability at every layer.
The Pillars of Impact
š 1. Core Backend & System Architecture (50%)
- Build and scaleĀ high-performance backend services and APIs
- Design efficientĀ database schemas, query optimization, and data flows
- Write clean, logical, production-grade code (Python, Golang, or similar)
- Own system performance ā latency, throughput, and reliability
āļø 2. Backend for AI Systems (30%)
- Develop backend systems supportingĀ AI agents and autonomous workflows
- HandleĀ large-scale data processing, async tasks, and event-driven systems
- Integrate backend infrastructure seamlessly with AI/ML components
š§ 3. Scalability & Distributed Systems (20%)
- Contribute toĀ microservices architecture and service decomposition
- BuildĀ fault-tolerant, highly available distributed systems
- Optimize systems forĀ high concurrency and real-time execution
Your Engineering Stack
Tech/ToolsPython / GolangBuilding core backend services and logic-heavy systemsAWS / GCPDeploying and scaling distributed backend infrastructureKafka / RabbitMQHandling asynchronous processing and event-driven workflows
The Bar
SignalCore Backend Experience2ā3 years of hands-on experience building APIs, backend systems, and scalable servicesProblem-Solving AbilityStrong fundamentals in data structures, algorithms, and logical thinkingSystem Design UnderstandingAbility to design scalable backend systems with clear architectural thinkingOwnership & ExecutionExperience owning backend features end-to-end in a fast-paced environment
The Interview Loop Ā· Screening for the Top 1%
RoundsRound I Ā· Recruiter ScreenEvaluation of backend experience, problem-solving approach, and project depthRound II Ā· Hiring ManagerDeep dive into backend projects, APIs, databases, and system design thinkingRound III Ā· Domain LeadLive coding + backend problem-solving + discussion on scalability and distributed systemsFinal Ā· LeadershipCulture fit, ownership mindset, and ability to operate in a high-velocity startup environment
Your Growth TrajectoryĀ TestMu AI is a high-growth environment where we promote based on complexity solved, not years of tenure. As a Backend Developer, you have a massive runway to scale from an Individual Contributor (IC) into a core Engineering Leadership role, working alongside pioneers in agentic intelligence.
Perks of the Future
- Health & Wellness:Ā 100% premium covered insurance for you + family (spouse, kids, parents) with annual check-ups.
- Fuel for Innovation:Ā Fresh, daily gourmet lunch and dinner served at our Noida HQ.
- Seamless Transit:Ā Safe, GPS-enabled cab facilities for eligible shifts (home-office-home).
- POD Culture:Ā Dedicated quarterly budgets for team-building, offsites, and collaborative celebrations.

About TestMu AI (Formely LambdaTest)
About
TestMu AI (formerly LambdaTest) is the worldās 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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- Good understanding of Generics, OOPs concepts & Design Patterns
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ļ· You will be responsible for working with cross functional teams to deep dive into the
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Ā
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management to collect requirements, describe software product features, technical designs,
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picking appropriate tools and techniques for implementation.
2. Be a hands-on developer able to independently make correct implement choices, follow
sound development practices to ensure an enterprise grade application.
3. Guide and mentor junior team members.
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1. A Bachelorās or Masterās degree in computer science with strong CS fundamentals and
problem solving.
2. 5+ years of hands-on experience with software development with 3+ years on web
backend development.
3. A good understanding of backend application interactions with relational databases like
MySQL, Postgres etc
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5. Enthusiastic to work in a dynamic, fast paced startup environment.
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1. Hands-on experience with designing database schema and implementing and debugging SQL queries for optimal performance for large datasets
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startup environment.
lives of API developers and consumers easier. If you love thinking big and delving deep and
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- Strong communication skills, get-things-done attitude, and empathy
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- Comfortable with iterative development practices and code reviews
- Previous experience as part of a product-oriented team is a plus
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NodeJS + Javascript, GoLang, Typescript + Nodejs, Clojure/Haskell/F#/Scala
(languages/environments)
Koa, Express, Play (frameworks)
Asynchronous Programming Frameworks (Akka, Nodejs, Tornado)
MongoDB, postgres, Bigtable, Dynamo (databases)
Apache Kafka, NATS, RabbitMQ, ZeroMQ (queues)
FunctionalProgramming, FRP (functional reactive)
microservices, multi-tenant, distributed-systems, distributed-computing, event-sourcing
Good to have Skillsets:
Clojure/Haskell/F#/Scala
Apache Kafka, NATS
FunctionalProgramming, FRP (functional reactive)
event-sourcing
Koa
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tested platform at scale (With our tags present in over 50 Million products already). We have
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- A chance to interact with top-notch executives from multiple industries
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- Open Pantry
- As a team, we love to travel :). An off-site every quarter
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- Integrating user-facing elements developed by a front-end developers with server side logic
- Building reusable code and libraries for future use
- Optimizing the application for maximum speed and scalability
- Understanding differences between multiple delivery platforms such as mobile vs desktop, and optimizing output to match the specific platform
- Creating database schemas that represent and support business processes
- Implementing automated testing platforms and unit tests
Ā
Ā
What you need to have:- Engineers from Tier 1 colleges, B.Tech/ B.E from only from Tier 1 colleges
- Extensive and expert programming experience in anyone programming language (Golang/ C/ Java).
- A solid foundation in computer science, with strong competencies in data structures, algorithms, software design and distributed system applications
- Experience with building and scaling apps with RDBMS as well as NoSQLs.
- Experience creating scalable Web APIs for mobile and browser consumption
- Have a penchant for solving complex and interesting problems
- Worked in start-up culture with high levels of ownership and commitment
- Excellent coding skills ā should be able to convert design into code fluently
- Working knowledge ofĀ - ReactJS, React Native, Golang, MySQL, NoSQL and hosting environment is AWS
We are looking for developers who are passionate about Python and know what are the benefits of python well.
Ā
Responsibilities:
- Design & implement new software modules based on the product requirements
- Debug existing software components, fix issues, and avoid regressions
- Be proactive, take ownership, and be accountable
- Familiar with Test Drive Development.
- Participate in software architecture, design discussions, and code reviews
Ā
Technologies weāre hiring for:
- Developed HTTP based REST APIs and implemented Authentication, Caching
- Worked with relational and NoSQL databases and aware of concepts like ORM, Migrations
- Languages & Frameworks: Python Django/Flask
- Database: Postgres/ Mongo
- Must have worked in a Unix/Linux based environment
- Advanced middleware like RabbitMQ, Celery Beat is definitely a plus.
Ā
Minimum 3+ year hands-on experience in Python needed
Responsibilities:
⢠Familiar with the software development life cycle (SDLC) from analysis to
deployment.
⢠Comply with coding standards and technical design.
⢠Adapts structured coding styles for easy review, testing and maintainability of
the code.
⢠Integrate the developed functionality and/or component into a fully functional
system.
⢠Ensure unit and integration level verification plan are in place and adheres to
great quality of code at all time.
⢠Active participate in troubleshooting, debugging and updating current live
system.
⢠Verify user feedback in making system more stable and easy.
⢠Work closely with analysts, designers and other peer developers.
⢠Preparing technical training documents for onboarding new engineers.
Requirements:
⢠Bachelorās degree in computer science or equivalent practical experience.
⢠Understanding of OOPS concepts, Persistence, Threading.
⢠Good understanding of version control system (GIT).
⢠Knowledgeable in data structures and algorithms.
⢠A background in Engineering with sound oral and written communication skills.
⢠3+ years of experience working on the server side.
Additional Requirements For Experienced Candidates:
⢠Exposure to API designing, scalable architecture and thorough understanding of
systems.
⢠Great database modeling skills.
⢠Working knowledge of Databases, both relational (such as PostgreSQL) and inmemory
database (such as Redis).
⢠Good understanding of web stack and how all the pieces fit together.
⢠Competent with developing web apps in popular MVC frameworks (Django, RoR,
etc,).
⢠Experience with open-source projects.
⢠Experience in designing interactive applications.







