
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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🚀 Hiring: Python Developer
⭐ Experience: 2+ Years
📍 Location: Mumbai (Andheri East )
⭐ Work Mode:- 5 Days Work From Office
⏱️ Notice Period: Immediate Joiners
(Only immediate joiners & candidates serving notice period)
Looking for a skilled Python Developer with experience in Django / FastAPI and MongoDB / PostgreSQL.
⭐ Must-Have Skills:-
✅ 2+ years of professional experience as a Python Developer
✅Proficient in Django or FastAPI
✅Hands-on with MongoDB or PostgreSQL
✅Strong understanding of REST APIs & Git
Have you ever felt the need to see the direct impact of what you do? Then consider this:
Currently, there are 70+ million Small and Medium Enterprises in India. And they need all the help to succeed against the continuous onslaught of much larger businesses.
Imagine a jewellery shop owner in Ghatkopar Mumbai. He may be procuring his goods that are to be sold in the shop from a fixed set of vendors - some his relatives, some that people have recommended and some that came and pitched to him. He may not have ever seen the kind of designs and products that a supplier from Mysore can offer. Or the credit terms that another supplier from Surat can offer. Putting him on a platform where he can easily browse products and build new business relationships is a life-changing proposition for him.
We believe that technology should be accessible and usable for these SMEs so that they can grow and simplify their business, and compete in a fair field.
If making the lives of businesses in India and the world simpler excites you, then this is the
perfect opportunity!
You will be solving challenging problems, defining your own charter and be the master of your own growth. The best way to predict your future is to create it.
We have more than 170k businesses on our platform already with great engagement numbers. We are backed by the top founders and VCs in the country(Titan Capital, FirstCheque).
We are set to grow even faster in the future.
Join us if you want to be a part of a fast-paced team.
Job Description
This is a remote position.
We’re in search of a senior back-end engineer that specializes in ROR with excellent
knowledge of core concepts of backend engineering.
Requirements
Must-haves:
1. You need to be excited about the problem that we are trying to solve
2. Should have excellent command over ruby on rails with a minimum experience of 2 years.
3. Additional knowledge in Golang will be an advantage
4. Strong Data Structures and Algorithms knowledge
5. Should have created APIs from scratch which is being used in Production
6. Should be comfortable with creating systems handling up to 100k requests per minute, and have a mindset that understands scale
7. Ability to give clarity and communicate well with the team, including Product, Backend and Dev-Ops (if and when needed)
8. Ability to use profiling tools well, getting to root causes of bugs fast
9. Ability to pick and work on adjacent technologies if and when required (Eg: If the
best performance monitoring solution needs a basic firebase setup, that should
not be a blocker for you to go ahead and do so)
10.Knowledge of how to set up relevant test cases
11. You need to be comfortable working in a remote environment (Have your own
laptop, good internet connection, availability on phone are required)
Good to have
1. App Development experience
2. Experience in Test Driven Development
3. Ability to tell Product what creates better User Experience, ability to tell frontend
what API responses will help the user get a faster load time
4. Inquisitiveness to understand the system as a whole, and not only be stuck to your domain of expertise (Eg: Figure out why excessive APIs calls are being made, brainstorm with Product and Frontend team to reduce the same without harming the UX )
5. Experience in working on a Social Media Product
6. Good knowledge of Graphs, and their applications
7. Data-Driven Approach to monitoring
Benefits
1. Work timings - You are the master of your time
2. Leave policy - Take a leave whenever for whatever reason you want. You don't
need to explain yourself to us
3. Industry standard salary
Title:
Node Js Developer
Ideal candidates will have 1-3 years of experience in Node JS and AWS.
Responsibilities:
- Translate application storyboards and use cases into functional applications
- Design, build and maintain efficient, reusable, and reliable Node JS code
- Ensure the best possible performance, quality, and responsiveness of applications
- Identify bottlenecks and bugs, and devise solutions to these problems, Help maintain code quality, organization, and automation.
- Triage and resolve complex + systemic issues reported on existing production systems
- Communicate effectively with product owners, and development team members to facilitate understanding of deliverables, estimates, and prioritization
- Contribute to production deployments, including documentation of technical specifications and release notes
- Designs and develops quality software that conforms to department standards and code style
- Writing reusable, testable, and efficient code, create automated test cases following TDD/BDD best practices
- Maintain and enhance existing NodeJS codebase.
- Organize an agile development process that facilitates collaboration, provides transparency, empowers the project team, surfaces and resolves impediments,delivers high-quality software, focuses on delivering business value, and continuously looks to improve.
- Take on a championship role in on-time, high-quality delivery of products through the entire application lifecycle.
What will you work on?
- Architecting clever technical solutions
- Hands-on development using NodeJS and other Javascript frameworks
- Recommend technical frameworks and tech stacks
- Define REST, or GraphQL APIs, document APIs and develop the API handlers
- Design and develop with serverless and scalable systems
- Integrate with 3rd party systems
- Create architectural solution prototypes
- Lead the team, code reviews, and problem-solving
What Makes You A Great Fit?
- 1+ years of software experience with Node JS, Javascript frameworks related to webstack
- Understanding the nature of asynchronous programming and its quirks and workarounds
- Experience with use of serverless functions from AWS
- Experience with architecture of technology systems having hands-on expertise in backend and cloud systems ( AWS, GCP)
- Expertise with NoSQL databases (Mongo, ElasticSearch, Redis) including design of schemas and development for these databases
- Knowledge of DevOps practices and CI/CD pipelines
- Experience in Microservice architecture and development including REST-based APIs.
- Highly collaborative with an affinity for solving complex problems through dialogue with team members.
- Curious, always seeking the whys and hows in order to gain a deeper and more complete understanding of the business and technology.
- Comfortable with ambiguity can begin to explore and solve complex problems when the problem and solution are not well-defined.
- Ability to multitask, switching between various projects/tasks of different natures and complexity with ease
- Knowledge of git based workflows such as gitflow
- Experience with Python in addition to the core knowledge of Node JS is a plus
- Chatbot, Machine Learning, Data Science/Big Data experience will be a plus
- Excellent communication skills, verbal and written
Competencies & Behavior
- Excellent communication and interpersonal skills
- Implement design thinking for different strategieS
- Attention to detail and the ability to work to tight deadlines
- Strong experience in cloud server infrastructure
- Ability to work on complex applications, perform product analysis, development tasks of complex web
- Jumping on a call with clients to understand the requirement and profile them the right solution, helping formulate an effective solution and turning it into a working application
- Conducting website performance and unit tests
- Heavy involvement in the requirements gathering, development and operational stages of new projects
- Troubleshoot and debug related application defects with existing and new applications
- Work collaboratively with the team members and train them as and when required.
- Developing chatbots and voice assistants on various platforms for diverse business use-cases
- Work on a chatbot framework/architecture using an open-source tool or library
- Implement Natural Language Processing (NLP) for chatbots
- Integration of chatbots with Management Dashboards and CRMs
- Resolve complex technical design issues by analyzing the logs, debugging code, and identifying technical issues/challenges/bugs in the process
- Deploy applications using CI/CD tools
- Designing and building highly scalable AI and ML solutions
- Ability to understand business requirements and translate them into technical requirements
- Open-minded, flexible, and willing to adapt to changing situations
- Ability to work independently as well as on a team and learn from colleagues
- High adaptability in a dynamic start-up environment.
- Experience with bot multi-lingual utilization (preferred)
- Experience with bot human escalation
- Ability to optimize applications for maximum speed and scalability
- Come up with new approaches and ideas to improve the current performance of Chatbots across multiple domains and build a highly personalized user experience.
QUALIFICATIONS : B. Tech/ B.E. /M. Tech or a related technical discipline from reputed universities
SKILLS REQUIRED :
- Minimum 3+ years- of experience in Chatbot Development using the Rasa open-source framework.
- Hands-on experience building and deploying chatbots.
- Experience in Conversational AI platforms for enterprises using ML and Deep Learning.
- Experience with both text to speech and vice versa transformation incorporation.
- Should have a good understanding of various Chatbot frameworks/platforms/libraries.
- Build and evolve/train the NLP platform from natural language text data being gathered from users on a daily basis.
- Code using primarily Python.
- Experience with bots for platforms like Facebook Messenger, Slack, Twitter, WhatsApp, etc.
- Knowledge of digital assistants such as Amazon Alexa, Google Assistant, etc.
- Experience in applying different NLP techniques to problems such as text. classification, text summarization, question & answering, information retrieval, knowledge extraction, and conversational bots design potentially with both traditional & Deep Learning
- Techniques - NLP Skills/Tools: NLP, HMM, MEMM, P/LSA, CRF, LDA, Semantic Hashing, Word2Vec, Seq2Seq, spaCy, Nltk, Gensim, Core NLP, NLU, NLG, etc.
- Should be familiar with these terms: Tokenization, N-Grams, Stemmers, lemmatization, Part of speech tagging, entity resolution, ontology, lexicology, phonetics, intents, entities, and context.
- Knowledge of SQL and NoSQL Databases such as MySQL, MongoDB, Cassandra, Redis, PostgreSQL
- Experience with working on public cloud services such as Digital Ocean, AWS, Azure, or GCP.
- Knowledge of Linux shell commands.
- Integration with Chat/Social software like Facebook Messenger, Twitter, SMS.
- Integration with Enterprise systems like Microsoft Dynamics CRM, Salesforce, Zendesk, Zoho, etc.
MUST HAVE :
- Strong foundation in the python programming language.
- Experience with various chatbot frameworks especially Rasa and Dialogflow.
- Strong understanding of other AI tools and applications like TensorFlow, Spacy, and Google Cloud ML is a BIG plus.
- Experience with RESTful services.
- Good understanding of HTTPS and Enterprise security.
4 years+ experience in full stack development
Highly proficient in JavaScript, Node.js and Vue.js
- Good foundation in CS fundamentals – algorithms, data structures
- Strong design and data modeling skills
- Good understanding of SQL and NOSQL databases
- Good concepts of object oriented programming and design patterns
-
Location - Remote
Good to have
- Familiarity with microservices design and testing
- Familiarity with docker based setup
- Prior experience in designing scalable microservices
- Familiarity with cloud infrastructure and cloud deployment
- Familiarity with CI/ CD pipelines
Role Description:
As a Lead Backend Engineer , you will be responsible for designing and deploying scalable, highly available, and fault-tolerant systems for Radiusagent. Experience as a Tech Lead, managing tasks with back-end engineers while coding themselves will be a bonus point for the ideal candidate.
Responsibilities will include-
- You will contribute to all aspects of an agile software development lifecycle including design, architecture, development, documentation, testing, and operations.
- You will build cutting-edge scalable systems by writing simple and efficient code.
- You will push your design and architecture limits for new product development.
- You will ensure compliance with the build/release and configuration management process.
Skills needed:
- be able to design and build modules from ground up
- proficient in any one programming language out of php/golang/node/python/javascript/java/ruby and ability to pick up others
- experience with mysql/postgres/mongodb/couchdb
- experience with redis/memcached
- experience with rabbitmq / kafka
- experience in having written cron jobs, troubleshooting downtime
- ability to work with ambiguous requirements
- good understanding of OS concepts
Nice to haves:
- experience with managing VMs' on aws/gcp/digitalocean
- experience with docker/kubernetes
- experience elasticsearch or lucene











