Backend Developer at TestMu AI (Formely LambdaTest) · Noida · 1 - 3 years · ₹10L - ₹25L / yr · Raised funding · Posted 24 Apr 2026

Backend Developer
📍 Noida | 🕐 Full-Time | 🧭 Experience: 2–3 Years
The Mission
We aren't building traditional backend systems — 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 — 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 — ensuring high performance, scalability, and reliability at every layer.
The Pillars of Impact
🚀 1. Core Backend & System Architecture (50%)
- Build and scale high-performance backend services and APIs
- Design efficient database schemas, query optimization, and data flows
- Write clean, logical, production-grade code (Python, Golang, or similar)
- Own system performance — latency, throughput, and reliability
⚙️ 2. Backend for AI Systems (30%)
- Develop backend systems supporting AI agents and autonomous workflows
- Handle large-scale data processing, async tasks, and event-driven systems
- Integrate backend infrastructure seamlessly with AI/ML components
🧠 3. Scalability & Distributed Systems (20%)
- Contribute to microservices architecture and service decomposition
- Build fault-tolerant, highly available distributed systems
- Optimize systems for 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 Experience2–3 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 · Screening for the Top 1%
RoundsRound I · Recruiter ScreenEvaluation of backend experience, problem-solving approach, and project depthRound II · Hiring ManagerDeep dive into backend projects, APIs, databases, and system design thinkingRound III · Domain LeadLive coding + backend problem-solving + discussion on scalability and distributed systemsFinal · LeadershipCulture fit, ownership mindset, and ability to operate in a high-velocity startup environment
Your Growth Trajectory 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: 100% premium covered insurance for you + family (spouse, kids, parents) with annual check-ups.
- Fuel for Innovation: Fresh, daily gourmet lunch and dinner served at our Noida HQ.
- Seamless Transit: Safe, GPS-enabled cab facilities for eligible shifts (home-office-home).
- POD Culture: Dedicated quarterly budgets for team-building, offsites, and collaborative celebrations.

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
Similar jobs (10)
🚀Job Title : Senior Backend Engineer (Java / Golang) SDE 3
Experience : 5 to 12 Years
Positions : 4
Employment Type : C2H (Contract to Hire)
Contract Duration : 3 Months
Location : Remote during contract → Pune after conversion
Work Mode After Conversion : 5 Days WFO
Notice Period : Immediate / Serving Notice / Up to 15 Days preferred
Mandatory Skills : Golang (1+ year mandatory), 5+ years Backend Development, System Design, Distributed Systems, Microservices, REST / GraphQL APIs, Event-Driven Architecture, SQL & NoSQL Databases, AWS / GCP / Azure, Strong Problem-Solving & Communication Skills.
About the Role :
We are looking for an experienced Backend Engineer / SDE 3 with strong expertise in Java / Golang to design and build scalable, secure, and high-performance backend services and APIs.
The role involves hands-on coding, system design, microservices, distributed systems, and collaboration with engineering and infrastructure teams.
Must-Have Skills :
- 5+ years of backend development experience.
- Strong hands-on experience with Golang.
- Minimum 1+ year of Golang experience is mandatory.
- Strong understanding of System Design & Distributed Systems.
- Experience with REST / GraphQL APIs.
- Experience with Microservices and Event-Driven Architecture.
- Experience with Event Queues / Asynchronous Processing.
- Strong knowledge of Relational and NoSQL databases.
- Familiarity with AWS, GCP, or Azure.
- Strong communication and problem-solving skills.
Important Note for Java Candidates :
Java candidates can be considered only if they have at least 1+ year of hands-on Golang experience and are willing to work in Golang.
Candidates with less than 1 year of Golang experience will not be considered.
Good to Have :
- Experience in Fintech / Payments / Transaction-heavy systems
- Docker & Kubernetes
- Datadog / Prometheus / Grafana
- CI/CD experience
- Exposure to Java or Ruby
Key Responsibilities :
- Design, develop, and maintain scalable backend services using Golang.
- Build reliable, secure, and high-performance microservices and APIs.
- Implement event-driven and asynchronous processing systems.
- Work on system architecture, scalability, performance, and reliability.
- Participate in system design, code reviews, and technical discussions.
- Collaborate with mobile, web, and infrastructure teams.
- Develop unit, integration, and performance tests.
- Contribute to CI/CD, observability, documentation, and engineering best practices.
Interview Process :
Round 1 : Take-Home Coding Assessment – Submission within 48 hours
Round 2 : Code Pairing – Problem Extension
Round 3 : Culture Fitment
Essential Duties and Responsibilities:
• Build new automations in Python: API integrations, data pipelines, scheduled jobs, and process replacements scoped with operating partners.
• Maintain the existing Power Automate estate, both unattended cloud and desktop flows. Triage failures, repair flows, and keep unattended runs healthy on the bot-server farm. Operate the Power Platform space around them: environments, solutions, connection references, and pipeline-managed deployments.
• Migrate Power Automate flows to Python where the economics favor it. Retire flows rather than patching them indefinitely.
• Integrate systems over REST APIs. Handle JSON and XML transformation, authentication (OAuth, service principals), and error handling that survives flaky endpoints.
• Author SQL queries, tables, and stored procedures that support automations.
• Operate what you build. Instrument jobs with logging, monitoring, and alerting so failures surface before the business notices them. Write runbooks.
• Improve how automations run. Today they run as scheduled jobs on VMs. Help evaluate and move toward containerized or Azure-native execution (Functions, Container Apps) where it reduces operational load.
• Use AI coding tools as a core part of daily development, within company governance and review standards.
• Document what you build so the next engineer, or an operating partner, can understand and extend it.
Knowledge, Skills and Abilities:
• Python proficiency: clean scripting, packaging, error handling, structured logging, and enough testing to trust a job running unattended at 2 a.m.
• Power Automate strength across cloud and desktop flows: able to read, debug, and repair complex unattended flows built by someone else, plus the platform administration around them. You do not need to love the platform. You do need to support it capably, including solo coverage when other developers are out.
• REST API integration experience, including authentication patterns and rate-limit handling.
• SQL Server competence: comfortable writing T-SQL and authoring queries, tables, and stored procedures through a reviewed, versioned release process.
• Working knowledge of Azure: DevOps pipelines at minimum; Functions, Container Apps, or AKS exposure a plus.
• Daily fluency with AI-assisted development. You should be able to describe, in concrete detail, how you structure work with an agentic coding tool: what you delegate, what you review, where it fails, and how you catch it.
• PowerShell and shell scripting for glue work on Windows and Linux hosts.
• Production instincts: idempotent jobs, retries with backoff, alerting thresholds that page on real problems and stay quiet otherwise.
• Plain written and verbal communication. You will work directly with non-technical process owners who need to understand what an automation does and what to do when it stops.
Training and Experience:
• 3 to 5 years in automation engineering, RPA, or software engineering roles with automations shipped to production and operated afterward.
• A track record you can walk through: what you built, what broke, and what you changed.
• Demonstrated, current use of AI coding tools in real work. Candidates will be asked to describe their workflow in specifics; vague answers end the conversation.
We are looking for a Senior Software Developer to produce and implement functional software solutions. You will work with upper management to define software requirements and take the lead on operational and technical projects.
In this role, you should be able to work independently with little supervision. You should have excellent organization and problem-solving skills. If you also have hands-on experience in software development and agile methodologies, we’d like to meet you.
Your goal will be to develop high-quality software that is aligned with user needs and business goals.
Responsibilities
- Develop high-quality software design and architecture
- Identify, prioritize and execute tasks in the software development life cycle
- Develop tools and applications by producing clean, efficient code
- Automate tasks through appropriate tools and scripting
- Review and debug code
- Perform validation and verification testing
- Collaborate with internal teams and vendors to fix and improve products
- Document development phases and monitor systems
- Ensure software is up-to-date with the latest technologies.
Requirements and skills
- Proven experience as a Senior Software Engineer
- Extensive experience in software development, scripting and project management
- Knowledge of selected programming languages (e.g. Django, Python, C++) and the elastic search.
- Analytical mind with problem-solving aptitude
- Ability to work independently
- Excellent organizational and https://resources.workable.com/leadership-interview-questions" target="_blank">leadership skills
- BSc/BA in Computer Science or a related degree
The Sr. Analytics Engineer would provide technical expertise in needs identification, data modeling, data movement, and transformation mapping (source to target), automation and testing strategies, translating business needs into technical solutions with adherence to established data guidelines and approaches from a business unit or project perspective.
Understands and leverages best-fit technologies (e.g., traditional star schema structures, cloud, Hadoop, NoSQL, etc.) and approaches to address business and environmental challenges.
Provides data understanding and coordinates data-related activities with other data management groups such as master data management, data governance, and metadata management.
Actively participates with other consultants in problem-solving and approach development.
Responsibilities :
Provide a consultative approach with business users, asking questions to understand the business need and deriving the data flow, conceptual, logical, and physical data models based on those needs.
Perform data analysis to validate data models and to confirm the ability to meet business needs.
Assist with and support setting the data architecture direction, ensuring data architecture deliverables are developed, ensuring compliance to standards and guidelines, implementing the data architecture, and supporting technical developers at a project or business unit level.
Coordinate and consult with the Data Architect, project manager, client business staff, client technical staff and project developers in data architecture best practices and anything else that is data related at the project or business unit levels.
Work closely with Business Analysts and Solution Architects to design the data model satisfying the business needs and adhering to Enterprise Architecture.
Coordinate with Data Architects, Program Managers and participate in recurring meetings.
Help and mentor team members to understand the data model and subject areas.
Ensure that the team adheres to best practices and guidelines.
Requirements :
- Strong working knowledge of at least 3 years of Spark, Java/Scala/Pyspark, Kafka, Git, Unix / Linux, and ETL pipeline designing.
- Experience with Spark optimization/tuning/resource allocations
- Excellent understanding of IN memory distributed computing frameworks like Spark and its parameter tuning, writing optimized workflow sequences.
- Experience of relational databases (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., Redshift, Bigquery, Cassandra, etc).
- Familiarity with Docker, Kubernetes, Azure Data Lake/Blob storage, AWS S3, Google Cloud storage, etc.
- Have a deep understanding of the various stacks and components of the Big Data ecosystem.
- Hands-on experience with Python is a huge plus
You will be building product features solving complex business problems using state of the art technologies (Docker, Kubernetes, GCP, Python, Angular, ML/AI) in an ownership and integrity driven culture.
What will you do:
- Architect full-stack solutions for complex business requirements in a fast-paced environment while optimising for scalability, performance, concurrency, availability, security and code quality.
- Own and execute engineering projects end to end including API design, DB design, project planning, coding, and fluent communication with the rest of the team.
What we’re looking for:
- Bachelors/Masters in Computer Science or a related field
- Experience 3-6 years
- Strong ownership, integrity and drive to succeed individually and as a startup
- Good grasp on algorithms and data structures
Your Responsibilities :
1) Building highly scalable and secured applications/microservices and responsive APIs
2) Assessing the security risks associated with the platform architecture and suggesting/implementing suitable changes for the same.
3) Architect and implement back-end services to support our mobile and web clients.
4) Creating and implementing database schemas that represent and support business processes.
5) Use best software development practices and processes including unit testing, code reviews, and site monitoring post deployment.
6) Continue to research and evaluate new technologies that may improve performance and elegance of our software implementation.
7) Explore and Integrate third-party APIs when required for the project.
8) Work closely with the rest of the team to bring our features into production.
Your skills :
- Hands-on experience in Django Framework.
- Strong Knowledge of Python.
- Strong Knowledge of MVC design pattern and object oriented programming concepts.
- Strong knowledge of RDBMS like Postgresql and Database schema design.
- Experience in developing robust and secure RESTful web API and microservices using Django/Python.
- Experience in Test Driven Development.
- Experience in handling No-SQL MongoDB or similar.
- Hands-on experience in GitHub.
- Experience in CI, CD tools like jenkins.
- Experience in managing cloud-based web applications on Amazon Web Services or Google Cloud.
- You love code and up for the challenge!
Experience: 5+Yrs
Salary: Good hike on last drawn salary
Location: Indore
Working hours: 8 hours/day
Working days: 5 days/ week
Skills
As per 5 yrs below is the tech stack that he should know around django:
· Django forms
· Django Rest APIs
· Schedulers/Cron Jobs
· Customising middlewares
· Customising permission classes
· Management commands
· Fixtures
· Multiple Environment handling
· Multiple database integration
· SQL and NoSQL database integration experience
· Use of loggers or any logging mechanism
· Signals
· Push notifications over IOS/Android devices
· Email notifications
· Websockets
· Unit testing
· Caching
· Payment gateway integration
AWS & Deployment Skills:
· Deployment of Django over EC2 using Nginx or Apache2
· Configuring the Django to run the services like websockets, celery
· Using and configuring the RDS
· Should know how to use S3 buckets
aws-lambda
Backend Engineer (GO Developer)
Remote Working | Engineering Team | Full-time
Candidates from Product development background only will be taken ahead.
The Impact you will create in the Job:
Build campaign generation services which can send app notifications at a speed of 10 million a minute.
Dashboards to show Real time key performance indicators to clients.
Develop complex user segmentation engines which creates segments on Terabytes of data within few seconds.
Leverage the power of Kubernetes to maintain clusters running inside VPC's across the world.
Building highly available & horizontally scalable platform services for ever growing data.
Use cloud-based services like AWS Lambda for blazing fast throughput & auto scalability.
You will build backend services and APIs to create scalable engineering systems.
As an individual contributor, you will tackle some of our broadest technical challenges that requires deep technical knowledge, hands-on software development and seamless collaboration with all functions.
You will envision and develop features that are highly reliable and fault tolerant to deliver a superior customer experience.
Collaborating various highly-functional teams in the company to meet deliverables throughout the software development lifecycle.
Identify and improvise areas of improvement through data insights and research.
What we look for?
3-6 years experience in developing high scale internet applications/API based services.
Worked with GoLang as a primary language
Experience with High scale real time architectures
Experience with queueing systems like RabbitMQ, Kafka etc
Experience with Elasticsearch would be a plus
Having hands on experience with Kubernetes would be a plus.
Understanding of SMTP protocol would be a plus
Experience with MTA will be an added advantage.
Very strong analytic and problem-solving skills.
Enjoys working at solving challenges that come with developing real time high scale applications.
- Working in high paced competitive stock trading environment with core web app development, scripting, data interpretation and manipulation skills
- Designing, creating and maintaining our in-house software for business requirements
- Work on innovative ideas to improve the user experience of our internal systems and applications which are used by the trading teams
- Improve on existing tools to make trade monitoring systems robust and more reliable
Ideal candidate should have:
- Engineering degree in Computer Science (preferred) or any other discipline
- Experience on Python web app development (Preferably Django)
- Ability to work as a full stack developer
- Experience in Shell/Perl or Python scripting
- Prior experience of Linux or Unix based operating systems
- Ability to create automation scripts
- Experience/Knowledge of financial industry
- Ability to work in fast paced environment under pressure and manage multiple high priority projects
- Willingness to learn and work on new technologies
- Excellent communication skills










