
Job Description: Senior Node.js Backend Developer
Role Overview :
We are seeking an exceptionally skilled and results-oriented Senior Node.js Backend Developer to architect and develop the core platform for our next-generation, mobile-centric platform. This role demands deep expertise in building highly concurrent, asynchronous, and distributed systems designed for massive scalability and ultra-low latency. You will be instrumental in delivering a system that can reliably support millions of users and high-velocity data flow, designed for a cloud-agnostic architecture from inception.
Key Responsibilities
● High-Concurrency Development: Design and implement highly performant and resilient backend services using Node.js (TypeScript/JavaScript), leveraging its asynchronous nature to manage persistent connections and high throughput efficiently.
● Microservices & APIs: Lead the development and maintenance of microservices, focusing on defining and implementing secure, robust, and highly optimized APIs (REST/gRPC) for mobile clients.
● Real-Time Data Flow: Architect and implement real-time, bi-directional data synchronization mechanisms (e.g., WebSockets, dedicated streaming protocols) necessary for instantaneous information delivery across the platform.
● Data Modeling & Persistence: Collaborate on and execute data modeling strategies, integrating with high-volume, low-latency databases (e.g., Cassandra, ScyllaDB, Aerospike) optimized for extremely fast reads and writes.
● Optimization & Tuning: Proactively identify and resolve performance bottlenecks within the Node.js runtime, event loop, and service interactions to ensure exceptional user experience under heavy load.
● Ability to perform Research / POCs & choose the suitable technology.
Required Technical Expertise (3-6 Years Experience Focus)
● Core Node.js & TypeScript: 3-6 years of hands-on, production experience in Node.js, with expertise in modern TypeScript/ES6+ development for large-scale applications.
● Asynchronous Programming Mastery: Deep understanding and practical experience with the Node.js event loop, non-blocking I/O, and advanced asynchronous patterns (Promises, async/await) to maintain high concurrency.
● Distributed Systems & Microservices: Proven experience architecting and operating services within a distributed system/microservices environment, including deployment using Docker and Kubernetes.
● Messaging & Real-Time: Expert knowledge of and implementation experience with message queuing systems like Apache Kafka for event sourcing, and protocols (e.g., WebSockets) for real-time data sync.
● Database Expertise: Deep practical experience working with, tuning, and optimizing at least one NoSQL distributed database (e.g., Cassandra, ScyllaDB, or Aerospike) for extreme performance and horizontal scalability.
● Caching & Statelessness: Expertise in implementing various caching strategies using tools like Redis or Memcached to ensure service statelessness and reduce database load.
Scalability & Performance Expectations
● High Throughput: Services must be capable of processing extremely high volumes of data transactions and managing millions of concurrent connections without degradation in service quality.
● Latency Goal: Achieve and maintain a P95 latency of less than 100 milliseconds for all core, user-facing data operations.
● Cloud-Agnostic Design: Experience designing and implementing services that are abstracted from specific cloud provider dependencies, demonstrating familiarity with cloud-agnostic practices for deployment across AWS, GCP, or Azure.
● Observability: Strong experience leveraging modern observability tools (e.g., Prometheus, Grafana, Jaeger) to monitor, trace, and debug complex, asynchronous, and distributed Node.js applications in production.
Startup Mindset & Delivery Goals
● Extreme Ownership: Demonstrate the ability to take full technical ownership of complex modules, driving them from architectural concept through to stable, optimized production deployment.
● Agility: Possess the adaptability and technical versatility required to thrive in a fast-moving startup environment with continuous deployment and rapid feature iteration.

About i2b Technologies Pvt Ltd
About
i2b is a venture studio building AI-first consumer and B2B technology companies, partnering with founders to create scalable enterprise platforms and product-led businesses.
Founded by Deepak Gullapalli, i2b operates across AI-driven consumer products, scalable B2B SaaS platforms, and early-stage startup incubation, combining operating expertise, strategic capital, and hands-on mentorship to turn strong ideas into durable, high-growth companies while building the next generation of intelligent consumer and enterprise products.
Tech stack
Candid answers by the company
Hyderabad
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CK-12 (www.ck12.org) is on the lookout for talented, creative, and dedicated people to join our mission to provide great education to students around the world. We are looking for candidates to join our office in Bangalore.
We have a strong education platform that has served over 352+ Million users, have got over 2.88+ Billion questions answered, and have more than 350 thousand customized Flexbooks. We have embarked on an exciting journey to build an AI-powered student tutor and Teacher Assistant to build the next generation of learning platforms.
About CK-12 Foundation
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To achieve this noble and ambitious vision, we at CK-12 are challenging the traditional model of education to transform it dramatically. Technology has opened up lots of opportunities to revolutionize education for the benefit of students, teachers and parents.
We have chosen to be non-profit so that we can effectively realize our mission and do the right thing! It also provides us with the ability to experiment with big and bold ideas. CK-12 is backed by Vinod Khosla, a renowned technology venture capitalist.
At CK-12, you’ll experience the benefits of working in a dynamic, entrepreneurial, innovative and non-bureaucratic environment where you will get a lot of cool things done than you ever imagined! We are a small group of passionate folks who are determined to disrupt the current form of education.
Technology is key to scale education and we deeply believe in it. Come develop great solutions on our cloud-based (AWS) and AI-first platform delivering rich and interactive content.
Does our mission, people and technologies excite you? If the answer is YES! and you are a great technologist who will challenge status-quo (no order takers please!) by innovating, please come join us! Together, we will change the world!
Check out our latest product offerings
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Location: https://goo.gl/maps/NkA2Hr8JhtE3raWr5
Backend Engineer
Basic
● Design, maintain, and monitor infrastructure for data products
● Design and develop RESTful APIs for the data infrastructure
● Design, implement and drive adoption of new analytic technologies and solutions
● Work closely with data scientists, front end engineers and peers to gather requirements and
develop solutions
● Handle and resolve issues escalated from the production operational environment.
● Troubleshoot performance, reliability, and scalability issues.
● Excellent Problem solving skills
● A Code Craftsman that follows best software development and coding practices delivering
understandable and maintainable code with thorough unit tests coverage
Requirements
● 6+ years of development experience with Java, Scala, and/or Python
● Experience with writing and executing queries on RDBMS and NoSQL databases. Working knowledge of MongoDB, MySQL. We are not looking for a DBA.
● Experience with ElasticSearch, OpenSearch, Vector Embeddings, and large-scale search systems.
● Experience designing and operating high-throughput, low-latency backend services in production environments.
● Experience with horizontal and vertical scaling strategies, load balancing, caching, rate
limiting, and performance optimization.
● Experience identifying and resolving application bottlenecks through profiling, monitoring, and performance tuning.
● Experience in virtualization technologies and deployment frameworks (familiarity with working on UNIX shell, Jenkins.)
● Bachelors or masters degree in computer science or equivalent
Desired
● Experience working with FastAPI/Pylons Web Framework.
● Familiarity with messaging and distributed processing systems such as RabbitMQ, Kafka, SQS, or Celery.
● Experience designing systems to support millions of requests, large datasets, and high-concurrency workloads.
● Adept at AI Coding assistants, leveraging them beyond prompting. Working experience in Skill and tool development and usage in AI Coding tools.
● Experience with AWS EC2, Redshift, RDS, S3
MUST HAVES:
- #java11, Java 17 & above only
- #springboot #microservices experience is must
- #cloud experience is must (AWS or GCP or Azure)
- Strong understanding of #functionalprogramming and #reactiveprogramming concepts.
- Experience with asynchronous programming and async frameworks/libraries.
- Proficiency in #sql databases (MySQL, PostgreSQL, etc.).
- WFO in NOIDA only.
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- Knowledge of socket programming and real-time communication protocols.
- Experience of building complex enterprise grade applications with multiple components and integrations
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- Good communication skills
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- Excellent problem-solving skills and attention to detail.
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Backend Web Developer
Our client operates from 18 cities across 13 countries. Our investment personnel manage US $247 billion across a wide range of global, regional and country-specific strategies - both traditional and alternative - in listed equity and fixed income. At Lazard Asset Management, we pride ourselves in balancing the feel of a small firm with the scale of a large global organization. Our entrepreneurial culture and flat management structure foster an environment in which good ideas can take flight, no matter where they come from.
Our client is looking for an innovative software engineer to join our IT department. This individual will be working on the systems that support the global sales and marketing organization. This role will be responsible for building and supporting the backend services and API’s used in all of the applications. This role requires a highly motivated, organized and experienced developer with pride of ownership reflected through clean design, code quality and a disciplined software development approach.
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- Design and implement middle-tier web applications, and RESTful services.
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- Be part of an empowered team following agile methodologies.
Desired Candidate Profile:
- 5+ year’s applications development experience with full-stack development and agile frameworks.
- Strong understanding of object-oriented programming and service-oriented design.
- Work effectively both as a contributing team member and independently.
- Strong verbal and written communication skills.
- Creative problem solving with the ability to present multiple solutions and potential side effects.
- Fast paced programming mentality with quick turnaround.
Required Skills:
- Expertise with API creation and RESTful services.
- Expertise developing backend server components using Python, NodeJS, C#
- Expertise building micro service architecture.
- Experiencebuilding and supporting websites using CMS systems (Tridion, Drupal, AEM)
- Experience and proficiency with relational databases (SQL Server, Oracle, Sybase).
- Experience and proficiency with NoSQL databases (MongoDB, Cassandra).
Desired Skills:
- Experience running services on container technologies like Kubernetes and Docker.
- Amazon AWS or equivalent cloud architecture experience with a major cloud provider.
- Experience with Jira.
- Experience building CI/CD pipelines using Jenkins or TeamCity.
- Experience with CRM systems especially Salesforce is a plus.
Kapture CRM is an enterprise-focused Service automation SaaS platform. We help 500+ enterprises in 14 countries to manage their customer service in a more intelligent, contextual way.
Roles & Responsibilities :
* Proven experience in Java8, Spring Boot, Microservices/API
* Strong experience with Kafka, Kubernetes
* Strong experience in using RDBMS (Mysql) and NoSQL.
* Experience in working in Eclipse / Maven environments.
* Hands-on experience in Unix / Shell scripting.
* Hands-on experience in fine-tuning application response/performance testing.
* Experience in Web Services.
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Senior Software Engineer - Backend: Innovation Accelerator
Cloudera is looking for a passionate Backend Software Engineer to play a key role in advancing Cloudera’s database offerings across multiple cloud providers. Since its origin, Cloudera has enabled several enterprise organizations to effectively manage and use their data using the on-premise infrastructure. We are now building software solutions that enable our customers to leverage cloud infrastructure to facilitate their growing data needs, and thereby accelerating Cloudera’s next stage of growth.
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Contribute to and provide feedback to other team members
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Brainstorm and contribute ideas to our technology, algorithms and products
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Work with product, design, customer-success teams to understand end-user requirements, formulate use cases, and translate those into effective technical solutions
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Dive into challenging technical problems and successfully deliver results
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And since we believe in high quality software engineering environments, you likely have:
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Worked with a team of designers/engineers who reviewed each other's code/designs and held each other to an extremely high bar for quality of code/designs
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Be comfortable providing estimates and sticking to estimates!
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Written unit tests and testable code
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Depended on continuous integration, and participated in build and release processes
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Own the quality of the code you wrote even (especially!) when it is running in production
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Bachelor's/Master’s degree in Computer Science or related field/experience
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5+ years of experience building software
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Experience building distributed systems/databases
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Experience with one or more of the following:
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Company: MNC
Location: Pune (Currently WFH)
Experience: 4-6 Years
Shift: 11:30AM - 8:30PM
Skills: .Net Core, Microservices, Web API / Rest API, C#, Azure Functions, CosmosDB
Job Details:
- Develop client projects using Asp.net core 3.1 and above, MySQL Database, Azure Functions, CosmosDB, C#.
- Communicate with external clients on a regular basis regarding progress, challenges, timelines and results of client projects
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- Create and update, design and functional documents
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- Implement project applications according to specifications
- Research technical issues and provide recommendations to enhance client websites
- Work both independently and as part of a team to create reliable and high-performing Web Applications
- Unit test code to ensure quality
- Develop client projects using Asp.net core 3.1 and above, MySQL Database, Azure Functions, CosmosDB, C#.
- Communicate with external clients on a regular basis regarding progress, challenges, timelines and results of client projects
- Gather technical requirements as needed
- Create and update, design and functional documents
- Identify and troubleshoot issues as needed
- Perform a new development as required
- Implement project applications according to specifications
- Research technical issues and provide recommendations to enhance client websites
- Work both independently and as part of a team to create reliable and high-performing Web Applications
- Unit test code to ensure quality
Vah Vah! is an ed-tech company that offers online makeup courses in micro-batches to students across India to learn from the leading teachers in top cities. We provide holistic education with lots of practical training that makes our students job-ready with not just the base skills but also the soft skills for great customer service. Our teachers have more than 15+ years of experience in training makeup and have certified more than 1000+ students. Vah Vah! is founded by executives with extensive experience running consumer business and mobile games at scale (over 100 million players) at Zynga. Vah Vah! is backed by a leading investment firm.
Website Link: https://vahvah.com/
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Vah Vah teaches professional makeup to budding makeup artists and influencers through live online classes. We have students from Srinagar, all the way to the Andamans. And experienced teachers who have worked in Bridal Makeup, Ramp Shoots, Film and more. We empower our students to join the workforce as fully trained makeup artists. This is the future of vocational education, and you can help build it.
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- Immense exposure to new technologies
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- Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement.
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- Participating in continuing education and training to remain current on best practices, learn new programming languages, and better assist other team members. Taking lead on projects, as needed.
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- Overall experience of 2-5 years in building backend services using languages like NodeJs, Java etc
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- Focus on efficiency, user experience, and process improvement.
- Strong problem solving and verbal and written communication skills.
- Ability to work independently or with a group.
- Sound knowledge on source control and DevOps
What you get:
- Amazing workplace and colleagues to work with
- Competitive salary at par with the best in the industry
- Immense exposure to new technologies
In this role, you should be able to write functional code with a sharp eye for spotting defects. You should be a team player and an excellent communicator. If you are also passionate about the .NET framework and software design/architecture, we- d like to meet you.
Your goal will be to work with internal teams to design, develop and maintain software.
Responsibilities and Duties :
- Writing clean, scalable code using .NET programming languages.
- Build high-quality scalable and predictable web applications on the .NET Technology stack and maintain internal and external facing web applications.
- Creating and integrating services and APIs using Web API 2 for various products and applications.
- Working on system architecture and databasing in MongoDB, MySQL, and NoSQL.
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- Evaluate new code for reliable architecture, stability, reusability, performance, automation, security, and metrics
- Using JSON to store and transport data.
- Working with other team members and the team lead using Project Management Tools and Version Source Control to create industry-leading technological products.
Skills required:
- 1 - 3 years of experience in MongoDB.
- Knowledge about AWS Cloud is an added advantage.
- Knowledge of .NET development and lifecycle methods in C# Language.
- Experience in making Web API 2 including routes, class components, async methods, parallel programming, authentication, and authorization, etc.
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Function: Software Engineering → Backend Development
Responsibilities:
Review requirements, design specifications and propose a solution and have a discussion before implementation
Work with team leads on the requirements and create estimates against those requirements
Deliver projects on time in an agile and continuous development environment
Writing tests in a client-side test framework such as Jest, Jasmine, Mocha, etc.
Work with QA team for resolving issues
Report status with tools like JIRA to stakeholders
Requirements:
3-5 years of work experience developing complex software
Minimum 2years sound experience with back-end development in Java-script frameworks like loopback, Express, etc.
A solid understanding of core JavaScript principles and its fundamentals
Familiarity with popular JavaScript tools, frameworks, and design principles, and enjoy staying up to date with the changing JavaScript ecosystem
Strong communication skills across the board, with a passion for finding and sharing best practices and driving greater discipline
Experience using Version Control (GitHub/Gitlab).
Passionate about code quality, extensibility, and simple architecture design
Skills:
JavaScript
Node
Express
Loopback
OAuth
API Development
Plus Points:
Knowledge of Go, Ruby, Python, Closure or any other languages
Test Driven Development (TDD)
Knowledge of front-end development









