
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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JOB DETAILS:
* Job Title: Java Lead-Java, MS, Kafka-TVM - Java (Core & Enterprise), Spring/Micronaut, Kafka
* Industry: Global Digital Transformation Solutions Provider
* Salary: Best in Industry
* Experience: 9 to 12 years
* Location: Trivandrum, Thiruvananthapuram
Job Description
Experience
- 9+ years of experience in Java-based backend application development
- Proven experience building and maintaining enterprise-grade, scalable applications
- Hands-on experience working with microservices and event-driven architectures
- Experience working in Agile and DevOps-driven development environments
Mandatory Skills
- Advanced proficiency in core Java and enterprise Java concepts
- Strong hands-on experience with Spring Framework and/or Micronaut for building scalable backend applications
- Strong expertise in SQL, including database design, query optimization, and performance tuning
- Hands-on experience with PostgreSQL or other relational database management systems
- Strong experience with Kafka or similar event-driven messaging and streaming platforms
- Practical knowledge of CI/CD pipelines using GitLab
- Experience with Jenkins for build automation and deployment processes
- Strong understanding of GitLab for source code management and DevOps workflows
Responsibilities
- Design, develop, and maintain robust, scalable, and high-performance backend solutions
- Develop and deploy microservices using Spring or Micronaut frameworks
- Implement and integrate event-driven systems using Kafka
- Optimize SQL queries and manage PostgreSQL databases for performance and reliability
- Build, implement, and maintain CI/CD pipelines using GitLab and Jenkins
- Collaborate with cross-functional teams including product, QA, and DevOps to deliver high-quality software solutions
- Ensure code quality through best practices, reviews, and automated testing
Good-to-Have Skills
- Strong problem-solving and analytical abilities
- Experience working with Agile development methodologies such as Scrum or Kanban
- Exposure to cloud platforms such as AWS, Azure, or GCP
- Familiarity with containerization and orchestration tools such as Docker or Kubernetes
Skills: java, spring boot, kafka development, cicd, postgresql, gitlab
Must-Haves
Java Backend (9+ years), Spring Framework/Micronaut, SQL/PostgreSQL, Kafka, CI/CD (GitLab/Jenkins)
Advanced proficiency in core Java and enterprise Java concepts
Strong hands-oacn experience with Spring Framework and/or Micronaut for building scalable backend applications
Strong expertise in SQL, including database design, query optimization, and performance tuning
Hands-on experience with PostgreSQL or other relational database management systems
Strong experience with Kafka or similar event-driven messaging and streaming platforms
Practical knowledge of CI/CD pipelines using GitLab
Experience with Jenkins for build automation and deployment processes
Strong understanding of GitLab for source code management and DevOps workflows
*******
Notice period - 0 to 15 days only
Job stability is mandatory
Location: only Trivandrum
F2F Interview on 21st Feb 2026
• Writing and testing code, debugging programs and integrating applications with third-party
web services. To be successful in this role, you should have experience using server-side logic
and work well in a team.
• Ultimately, you'll build highly responsive web applications that align with our business needs.
• Write effective, scalable code Develop back-end components to improve responsiveness and
overall performance Integrate user-facing elements into applications.
• Test and debug programs
• Improve functionality of existing systems Implement security and data protection solutions
• Assess and prioritize feature requests
• Coordinate with internal teams to understand user requirements and provide technical
solutions
• Expertise in at least one popular Python framework (like Django, Flask, etc)
• Team spirit
• Good problem-solving skills.
Requirements
• 3 to 5 years of experience as a Python Developer
• Hands-on experience with Flask, Django or Gin or Revel or Sanic
• Knowledge of design/architectural patterns will be considered as a plus
• Experience working in an agile development environment with a strong focus on rapid
software development
• Experience in AWS or similar cloud technologies
• Excellent troubleshooting and debugging skills
• Proven ability to complete the assigned task according to the outlined scope and timeline
• Experience with messaging frameworks such as SQS/Kafka/RabbitMq
• Experience with Elastic Search
• Willingness to learn new and different technologies
Location - South Delhi
1. Design patterns- socket communication/ micro services architecture
2. Caching - REDIS MEMCACHED etc
3. Database - MONGO, SQL etc. min 2yrs experience with these.
4. Features created for large concurrent requests.
5. Node Js, Go lang any asynchronous programming language min 2 yrs exp with any one of them.
6. Message Queues - RABBIT MQ, Kafka etc.
7. Logging and APM (application process manager) good to have.
8. DS ALGO good to have.
Responsibilities:
- Develop and deploy services to improve the availability, ease of use/management, and visibility of 6sense systems
- Architecting, building, and scaling out our services and infrastructure
- Learning and adopting technologies that may aide in solving our challenges
- Own our systems like our Hadoop and Presto clusters, front/back-end services, build configurations, infrastructure components, deployment of services into our infrastructure, and everything in between
- Write/review/debug production code, develop documentation and capacity plans, and debug live production problems
- Contributing back to open-source projects if we need to add or patch functionality
- Support the overall Software Engineering team to resolve any issues they encounter
Minimum Qualifications:
- 5+ years in a Software Engineering role or equivalent experience
- 1+ years of experience with Linux/Unix system administration and networking fundamentals
- Strong skills in reading code as well as writing clean, maintainable, and scalable code
- Good knowledge of Python and Java
- Experience designing, building, and maintaining scalable services and/or service-oriented architecture
- Experience with high-availability
Bonus Requirements:
- Experience with modern configuration management tools (e.g. Ansible, Chef, Puppet) and idempotency
- Exposure to modern build systems such as Bazel, Buck, or Pants
- Knowledge of the Hadoop ecosystem (e.g. Hadoop, Hive, Presto) including deployment, scaling,
- and maintenance
- Knowledge of standard security practices
- 1+ years of experience working with Kubernetes, Docker
- Good knowledge of Javascript
lives of API developers and consumers easier. If you love thinking big and delving deep and
enjoy envisioning truly elegant solutions, this role is definitely for you.
What you will be Doing
- You will abstract away complex data interactions with easy-to-use APIs that will power several
mobile and web applications.
- You will also own, scale, and maintain the computational and storage infrastructure for the
various micro-services and long-running jobs, designed and implemented by you and the team.
- We will look to you to make key decisions on the technology stack, architecture, networking,
and security. We love working with bleeding-edge technology, especially if it improves the
malleability, and simplicity of our deliverables.
What you need
- The ideal Backend Engineers are polyglots who are fluent in HTTP and core CS concepts such
as algorithms, data structures, and programming paradigms, and always pick the right tools for
the right job.
- They have a keen eye for common security vulnerabilities and how to act on them (example:
DDOS attacks, SQL Injection etc.).
- They understand what it takes to work in a startup environment and know when to trade
performance for simplicity.
- They fail fast, learn faster, and execute in time.
- Strong communication skills, get-things-done attitude, and empathy
- Strong sense of ownership, drive and obsessive attention to detail.
- Comfortable with iterative development practices and code reviews
- Previous experience as part of a product-oriented team is a plus
Technical Skillsets:
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
Why you should consider this role seriously?
- We have an audacious vision of helping companies fight counterfeiting and managing their
supply chain more efficiently
- We have built a product and solved problems for some of the largest brands in the country and
tested platform at scale (With our tags present in over 50 Million products already). We have
plans to grow 10x in the next 1 year
- Ownership of key problems. Fast-paced environment
- We are a well-balanced team of experienced entrepreneurs and are backed by top investors
across India and the Silicon Valley (Venture Highway, Startup Buddy etc.)
- Competitive market salary
- Opportunity to work directly with the CEO, COO, CTO of the company
- A chance to interact with top-notch executives from multiple industries
- Open vacation policy (and we really mean it!)
- Open Pantry
- As a team, we love to travel :). An off-site every quarter
- 5 years experience with the Django framework
- Experience with building APIs (REST or GraphQL)
- Strong Troubleshooting and debugging skills
- React.js knowledge would be an added bonus
- Understanding on how to use a database like Postgres (prefered choice), SQLite, MongoDB, MySQL.
- Sound knowledge of object-oriented design and analysis.
- A strong passion for writing simple, clean and efficient code.
- Proficient understanding of code versioning tools Git.
Experience:
- Min 5 year experience
- Startup experience is a must.
Location:
- Remote developer
Timings:
- 40 hours a week but with 4 hours a day overlapping with client timezone. Typically clients are in California PST Timezone.
Position:
- Full time/Direct
- We have great benefits such as PF, medical insurance, 12 annual company holidays, 12 PTO leaves per year, annual increments, Diwali bonus, spot bonuses and other incentives etc.
- We dont believe in locking in people with large notice periods. You will stay here because you love the company. We have only a 15 days notice period.
Senior Software Engineer - Android
Job description
Overview
The job profile involves understanding and implementing the latest technologies and closely following the global trends on the web and mobile web development.
Here is what we look for in a Software Engineer Android
It’s all about the users. We have to think like the user and plan all strategies and align content strategy accordingly. The efforts of the Technology team are to keep our primary TG engaged and attract a newer audience.
- Be the USER: Think from a user perspective, and plan content strategies according to what will be relatable to them.
- Deliver WOW: Never settle for mediocrity. Aspire for new user benchmarks. Passionately seek unconventional solutions that have the potential of breaking new grounds achieving exponential reach and engagement.
- Embrace & Drive CHANGE: Embrace curiosity. Accept and enthusiastically encourage change while questioning the status quo and showing initiative. Never let the fear of failing hold you back.
Role
This is a front-end role, but not limited to it. You will be learning a lot about Android development along with other mobile technologies too. Also, we believe in extreme ownership!
And to be honest, everyone loves working with kind and smart people. We are building a kick-ass team with humble and empathetic talent.
What you will do in this role
- Design and build advanced applications for the Android platform
- Collaborate with cross-functional teams to define, design, and ship new features
- Unit-test code for robustness, including edge cases, usability, and general reliability
- Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
- Translate designs and wireframes into high-quality code.
- Design, build and maintain high performance, reusable, and reliable Java code
- Ensure the best possible performance, quality, and responsiveness of the application
- Identify and correct bottlenecks and fix bugs.
Job requirements
What you should have
- 3-7 years of work experience developing complex software.
- Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes
- Good knowledge of design patterns like Creational, Structural and Behavioral patterns, MVP, MVC, etc.
- Familiarity with RESTful APIs to connect Android applications to back-end services
- Strong knowledge of Android UI design principles, patterns, and best practices
- Experience with offline storage, threading, and performance tuning
- Knowledge of the open-source Android ecosystem and the libraries available for common tasks
- Ability to understand business requirements and translate them into technical requirements
- Familiarity with cloud message APIs and push notifications
- A knack for benchmarking and optimization
- Understanding of Google’s Android design principles and interface guidelines
- Proficient understanding of code versioning tools, such as Git
- Proven software development experience and Android skills development
- Have published at least 3 original Android app
- Experience with third-party libraries and APIs
- Solid understanding of the full mobile development life cycle
Education: Any Graduate
Experience (years): 3 to 7 years, good to have prior experience in product development
Brownie Points
- Mobile Application Development
- Model-View-Controller (MVC)
- User Experience (UX)
- Model-View-Presenter (MVP)
- Representational State Transfer (REST)
- Android
- Mobile Architecture
- SDK
- Android SDK
Advanced proficiency in MEAN Stack (NodeJS, MongoDB, Express, Angular JS)
Proficiency and hands-on experience with one or more of the following: Backbone / Knockout JS / Ember JS / React JS
Knowledge of JQuery would be an added advantage
Thorough knowledge of software development best practices, including coding standards, code reviews, source control management, build process, continuous integration and continuous delivery
Thorough knowledge of Node.JS, MongoDB, Angular JS, Express JS and JavaScript
Ability to plan core architecture, and to enhance it from time to time
Strong analytical mindset to derive actionable analytics from data
PLEASE ONLY APPLY FOR THIS JOB IF YOU ARE AN EXPERT IN NODE.JS
Addenda is a Dubai based Insurtech startup that utilises the blockchain to share life/medical/motor insurance information among a consortium of insurers. Our Products helps insurers avoids anti selection, non-disclosure, overexposure, and ensures transparency between the policy applicant and the insurance company.
We are looking for a NodeJS Backend Developer who is energetic, self-directed and self-motivated. You should possess a strong desire to learn and contribute solutions and ideas to a dynamic team.
Responsibilities
- Development of all server-side logic and ensuring high performance and responsiveness to requests from the front-end.
- Develop stable and secure RESTful APIs, Microservices, automated tests
- Build reusable code and libraries for future use
- Optimise backend for maximum speed and scalability
- Collaborate with other team members and stakeholders for front-end or otherwise
Skills
- Proficient understanding of Express.JS, Node.JS, MongoDB
- In Depth Knowledge of creating Secure RESTful APIs, Web Services or micro services along with caching, content management capabilities
- Knowledge of API Design and Development and Security Patterns on API’s using various Authentication mechanisms
- Experience in Cloud Technology for Deployment of Services is a plus
- Proficient understanding of code versioning tools, such as Git






