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

About O4S
About
Connect with the team
Similar jobs
1) Be open to learn new frameworks like Hapi.JS , Typescript , Nest.JS
2) Strong DB concepts , and hands on knowledge on MongoDB , REDIS
3) Experience working with micro-services will be a plus
4) Experience working with JWT and IAM systems will be a plus
5) Experience working with Postman , Swagger will be a plus
6) TDD knowledge is an advantage and also working with Unit Test code and familiar with test code coverage concepts.
7) Strong operating system knowledge is a plus with knowledge of how to manage threads.
8) Working experience with RabbitMQ , Kafka will be a plus
9) Strong knowledge of JS internals is a must.
10) Familiar with the Django REST API Framework.
11) Experience with the FAST API framework will be a plus
We need flexible employees for any technology
You can contact me on nine three one six one two zero one three two
Position : Software Engineer (Java Backend Engineer)
Experience : 4+ Years
📍 Location : Bangalore, India (Hybrid)
Mandatory Skills : Java 8+ (Advanced Features), Spring Boot, Apache Spark (Spark Streaming), SQL & Cosmos DB, Git, Maven, CI/CD (Jenkins, GitHub), Azure Cloud, Agile Scrum.
About the Role :
We are seeking a highly skilled Backend Engineer with expertise in Java, Spark, and microservices architecture to join our dynamic team. The ideal candidate will have a strong background in object-oriented programming, experience with Spark Streaming, and a deep understanding of distributed systems and cloud technologies.
Key Responsibilities :
- Design, develop, and maintain highly scalable microservices and optimized RESTful APIs using Spring Boot and Java 8+.
- Implement and optimize Spark Streaming applications for real-time data processing.
- Utilize advanced Java 8 features, including:
- Functional interfaces & Lambda expressions
- Streams and Parallel Streams
- Completable Futures & Concurrency API improvements
- Enhanced Collections APIs
- Work with relational (SQL) and NoSQL (Cosmos DB) databases, ensuring efficient data modeling and retrieval.
- Develop and manage CI/CD pipelines using Jenkins, GitHub, and related automation tools.
- Collaborate with cross-functional teams, including Product, Business, and Automation, to deliver end-to-end product features.
- Ensure adherence to Agile Scrum practices and participate in code reviews to maintain high-quality standards.
- Deploy and manage applications in Azure Cloud environments.
Minimum Qualifications:
- BS/MS in Computer Science or a related field.
- 4+ Years of experience developing backend applications with Spring Boot and Java 8+.
- 3+ Years of hands-on experience with Git for version control.
- Strong understanding of software design patterns and distributed computing principles.
- Experience with Maven for building and deploying artifacts.
- Proven ability to work in Agile Scrum environments with a collaborative team mindset.
- Prior experience with Azure Cloud Technologies.
Summary
We are looking for a motivated Odoo Developer to design, develop, and maintain ERP solutions on both Odoo Community and Enterprise editions. The ideal candidate will have strong Python skills, practical experience with the Odoo framework, and the ability to deliver scalable, customized modules that align with business requirements. Compensation will be offered as a 25% to 50% hike on the candidate’s last drawn salary, based on experience and skill set.
Key Responsibilities
- Develop, customize, and maintain Odoo ERP modules for both Community and Enterprise editions.
- Create new custom modules and enhance existing ones to extend system functionality.
- Write clean, efficient, and well-documented Python code following Odoo development standards.
- Troubleshoot, debug, and resolve technical issues to ensure optimal system performance.
- Collaborate with functional consultants and business stakeholders to deliver scalable ERP solutions.
- Design and implement integrations between Odoo and third-party systems such as APIs, payment gateways, CRM tools, and other business applications.
- Optimize database queries and improve system performance.
- Participate in code reviews, testing, and deployment processes.
Required Skills & Experience
- Minimum 3 years of experience in Odoo development (Community and/or Enterprise editions).
- Strong proficiency in Python and understanding of the Odoo framework.
- Experience with PostgreSQL and database design concepts.
- Knowledge of Odoo ORM, QWeb, XML, and JavaScript.
- Hands-on experience developing and customizing Odoo modules.
- Familiarity with REST APIs and third-party integrations.
- Good debugging and problem-solving skills.
- Understanding of Git or other version control systems.
- Ability to work independently and in a team environment.
Preferred Qualifications
- Bachelor’s degree in Computer Science, Information Technology, or a related field.
- Experience working with both Odoo Community and Enterprise editions.
- Exposure to Odoo.sh or cloud deployment environments.
- Basic understanding of business processes such as Accounting, Sales, Inventory, or HR in ERP systems.
- Experience in Agile development methodologies is a plus.
Note
This is an immediate full-time remote requirement. Candidates who are passionate about ERP development and can work with both Odoo Community and Enterprise editions are encouraged to apply.
Job Description: Node.js Developer (3+ Years Experience)
Division/Department: Engineering
Industry: Insurance / Fintech
Employment Type: Full-Time, Permanent
Job Summary
We are looking for a skilled Node.js Developer who is experienced with JavaScript/TypeScript, databases, and modern AI development tools. You will build and maintain backend applications, design scalable systems, and use AI tools to enhance development productivity. The role involves backend development, database management, API development, and cloud deployment.
What You’ll Be Doing
Backend Development
- Build and maintain Node.js applications, services, and APIs.
- Write clean, readable JavaScript/TypeScript code.
- Create and manage REST APIs; work with GraphQL when required.
- Develop microservices and containerized applications (Docker).
- Participate in code reviews and help maintain coding standards.
Database Work
- Design database schemas for PostgreSQL, MongoDB, and Redis.
- Write optimized SQL and NoSQL queries.
- Implement indexing and manage database performance tuning.
- Handle database scaling and caching strategies.
AI Tools & Productivity
- Use AI coding assistants (GitHub Copilot, Cursor AI, Tabnine).
- Integrate AI APIs (OpenAI, Claude) into backend applications.
- Build features powered by AI/ML capabilities.
- Use AI tools to debug and enhance code quality.
Deployment & Operations
- Deploy applications on AWS, Azure, or GCP.
- Set up CI/CD pipelines (GitHub Actions, Jenkins).
- Work with Docker and Kubernetes.
- Monitor backend services and perform troubleshooting.
Job Requirements
Must-Have (2–7 Years Experience)
- Strong hands-on experience with Node.js and Express.js.
- Excellent understanding of JavaScript/TypeScript, ES6+, async/await.
- Experience with at least one major database: PostgreSQL, MongoDB, Redis.
- Knowledge of API development (REST, GraphQL).
- Hands-on experience with Git and version control.
- Experience with testing tools like Jest, Mocha, or similar.
AI Tools Experience
- Familiarity with AI coding assistants.
- Working with AI APIs (OpenAI, Claude, etc.).
- Experience using AI tools for debugging and code optimization.
- Basic understanding of prompt engineering.
Bonus Skills (Good to Have)
- Cloud platforms: AWS, Azure, Google Cloud.
- Docker, Kubernetes.
- CI/CD pipelines.
- Frontend exposure (React/Vue/Angular).
- Message queues: RabbitMQ, Kafka.
- Caching: Redis, Memcached.
- API security: JWT, OAuth2.
Mandatory Skills
Technical
- Experience building and deploying Node.js applications.
- Strong command over databases and efficient query writing.
- Comfort with AI-based coding tools.
- Ability to debug and solve backend issues independently.
Soft Skills
- Strong communication and teamwork skills.
- Self-driven and eager to learn new technologies.
- Ability to mentor junior developers (for senior positions).
Role: Senior Full Stack Lead (Backend Focus)
Experience: 10+ Years
Location: Hyderabad (On-site)
We have an urgent requirement for a Senior Full Stack Lead with strong backend expertise and solid solutioning experience and development experience
The ideal candidate should be technically strong, capable of designing scalable solutions, and experienced in leading development across web and mobile platforms.
Key Expectations:
- Strong solutioning and development experience
- Backend-focused full stack profile
- Experience in Healthcare / Insurance domain (good to have)
- Hands-on experience building mobile applications (important) and web applications throughout career
- Experience with applications deployed to App Store / Play Store
Mandatory Skills:
- Java
- Spring Boot
- Microservices Architecture
- React (Client is using)
Nice to Have:
- Cloud exposure (AWS / Azure / GCP)
- CI/CD and DevOps practices
Profile: AWS Data Engineer
Mode- Hybrid
Experience- 5+7 years
Locations - Bengaluru, Pune, Chennai, Mumbai, Gurugram
Roles and Responsibilities
- Design and maintain ETL pipelines using AWS Glue and Python/PySpark
- Optimize SQL queries for Redshift and Athena
- Develop Lambda functions for serverless data processing
- Configure AWS DMS for database migration and replication
- Implement infrastructure as code with CloudFormation
- Build optimized data models for performance
- Manage RDS databases and AWS service integrations
- Troubleshoot and improve data processing efficiency
- Gather requirements from business stakeholders
- Implement data quality checks and validation
- Document data pipelines and architecture
- Monitor workflows and implement alerting
- Keep current with AWS services and best practices
Required Technical Expertise:
- Python/PySpark for data processing
- AWS Glue for ETL operations
- Redshift and Athena for data querying
- AWS Lambda and serverless architecture
- AWS DMS and RDS management
- CloudFormation for infrastructure
- SQL optimization and performance tuning
Job Description
This is a remote position.
Requirements
- You need to be excited about the problem that we are trying to solve
- Should have excellent command over designing systems with a minimum experience of 4 years.
- Should have experience with various database flavors and writing complex queries. We work with Postgres, Redshift, ElasticSearch, TimescaleDB, and Redis.
- Additional knowledge in Golang will be an advantage
- Strong Data Structures and Algorithms knowledge
- Should have created APIs from scratch which is being used in Production
- Should be comfortable with creating systems handling up to 100k requests per minute, and have a mindset that understands scale
- Ability to give clarity and communicate well with the team, including Product, Backend and Dev-Ops (if and when needed)
- Ability to use profiling tools well, getting to root causes of bugs fast
- 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)
- Knowledge of how to set up relevant test cases
- You need to be comfortable working in a remote environment (Good internet connection and availability on phone is required)
- App Development experience
- Experience in Test Driven Development
- 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
- 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 )
- Experience in working on a Social Media Product
- Good knowledge of Graphs, and their applications
- Data-Driven Approach to monitoring
Benefits
- Work timings - You are the master of your time. However, with great freedom comes great responsibility. If you have committed something to the team, we expect that you will give it your best to make sure that commitment is done and is done on time.
- Leave policy - Take a leave whenever for whatever reason you want. You don't need to explain yourself to us
- Health insurance for you and your family
We are looking for an experienced NodeJS/ExpressJS/TypeScript developer. You will work on the most
critical software development team in a fast-growing data-centric software company. You will develop high performance, highly available REST and GraphQL APIs that will deliver data to our suite of web and mobile
apps.
Duties and Responsibilities
Software Development: You will work with the engineering lead to design and develop REST and
GraphQL APIs that will serve data from MongoDB and ElasticSearch.
Automated Test Scripts: You will write automated test scripts for all of your code. You will work with
the QA manager to determine optimal code coverage.
Code Reviews: You will assist in reviewing PRs raised by other team members. You will be
responsible for ensuring that the code satisfies the documented requirements, includes the necessary
automated tests and follows our documented coding standards and best practices.
API Support: API issues will be reported manually and automatically (via alerts) to a series of Slack
channels. You will monitor these channels and create Jira tickets to diagnose and fix these issues. You
will ensure that affected API consumers are informed regularly as to the status of the open issues.
API Documentation: You (and the rest of the API team) will be responsible for keeping the API
documentation up to date.
Skills and Qualifications
Bachelor's degree in computer science, information science, or similar.
Exceptional analytical and problem-solving skills.
Great organizational and time management skills.
Extensive knowledge of NodeJS libraries and frameworks.
REST APIs: 3+ years required.
GraphQL APIs: 1+ years desired.
ExpressJS or Fastify: 2+ years required
Advanced TypeScript: 1+ years required
NodeJS: 2+ years required
Node Streams: 1+ years desired
AWS High-Availability Clusters: 1+ years desired
MongoDB: 2+ years desired
Search Engines (ES or Solr): 2+ years desired
Big Data: 1+ years’ experience querying datasets with hundreds of millions of rows desired
Mocha/Chai: 1+ years desired
Bitbucket or GitHub: 1+ years required
Key Responsibilities:
• Actively work on server-side development on the .NET framework.
• Browser / client-side development on JavaScript (or its libraries such as JQuery).
• Work with data structures such as XML and JSON.
Required Skills:
• 2-4 years of hands-on experience on Web technologies.
• Minimum 6 months of experience on MVC is mandatory.
• Good knowledge and understanding of WCF, Windows services.
• Knowledge of Database development on MS SQL / Oracle DB.
• Good communication and problem-solving skills.
• Should be a self-starter and should have the ability to work under pressure.
• Should be passionate about sports.
Mandatory: Passionate about sports, Problem solving, Team player, Target & Result oriented.









