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
Core Responsibilities:
- Design, develop, and maintain backend services and APIs using Python or Golang.
- Write high-quality, testable, and maintainable code with a focus on performance and scalability.
- Implement automated tests and contribute to CI/CD pipelines.
- Collaborate with product, QA, and DevOps teams for end-to-end feature delivery.
- Troubleshoot production issues and provide timely resolutions.
- Participate in design and architecture discussions to improve system efficiency.
- Contribute to improving development processes, coding standards, and best practices.
Experience and Expertise:
- 1-2 years of experience in backend development with Python or Golang.
- Solid understanding of RESTful APIs, microservices, and distributed systems.
- Strong knowledge of data structures, algorithms, and OOPS principles.
- Hands-on experience with relational and/or NoSQL databases.
- Familiarity with Linux development, Docker, and basic cloud concepts (AWS/GCP/Azure).
- Proficiency with Git and version control workflows.
- Familiarity with AI-powered development tools or exposure to projects involving large language models (LLMs) is a plus.
Skills:
- Strong analytical and debugging skills with the ability to solve complex problems.
- Good communication and collaboration skills across teams.
- Ability to work independently with minimal supervision while being a strong team player.
- Growth mindset – eagerness to learn new technologies and improve continuously.
Job Title: Cloud Development & Linux Debugging Engineer
Experience: 5–10 Years
Location: Bangalore / Chennai
Job Summary
We are looking for an experienced Cloud Development & Linux Debugging Engineer with strong expertise in Linux internals, system-level programming, and cloud technologies. The ideal candidate will have hands-on experience in developing, debugging, and optimizing Linux-based systems along with exposure to DevOps tools and containerized environments.
Key Responsibilities
- Develop and debug software at the Linux system level (kernel/user space).
- Work on Linux internals, low-level system components, and performance optimization.
- Design, develop, and maintain applications using Python and C/C++.
- Troubleshoot complex issues in Linux and cloud-based environments.
- Collaborate with cross-functional teams in an Agile/Scrum environment.
- Contribute to automation and infrastructure using DevOps tools.
- Work with containerized and cloud platforms such as Kubernetes and OpenStack.
Required Skills
- Strong experience in Linux software development (Linux internals, system-level programming).
- Proficiency in Python and C/C++.
- Solid debugging and analytical skills.
- Hands-on experience with Ansible, Puppet, and DevOps practices.
- Experience working with OpenStack and Kubernetes.
- Good understanding of Agile/Scrum methodologies.
- Excellent communication and teamwork skills.
Preferred Skills (Good to Have)
- Experience with Go / Golang and Go templating.
- Knowledge of Kubernetes Operators and Helm.
- Exposure to containerization technologies (Docker, Kubernetes).
- Contributions to open-source projects.
- Experience with cloud-native architectures.
Qualifications
- Bachelor’s/Master’s degree in Computer Science, Engineering, or related field.
- Self-driven individual with a strong learning mindset.
- Ability to work independently and in collaborative team environments.
Job Title: Python Developer (Full Time)
Location: Hyderabad (Onsite)
Interview: Virtual and Face to Face Interview (Last round)
Experience Required: 4 + Years
Working Days: 5 Days
About the Role
We are seeking a highly skilled Lead Python Developer with a strong background in building scalable and secure applications. The ideal candidate will have hands-on expertise in Python frameworks, API integrations, and modern application architectures. This role requires a tech leader who can balance innovation, performance, and compliance while driving successful project delivery.
Key Responsibilities
- Application Development
- Architect and develop robust, high-performance applications using Django, Flask, and FastAPI.
- API Integration
- Design and implement seamless integration with third-party APIs (including travel-related APIs, payment gateways, and external service providers).
- Data Management
- Develop and optimize ETL pipelines for structured and unstructured data using data lakes and distributed storage solutions.
- Microservices Architecture
- Build modular, scalable applications using microservices principles for independent deployment and high availability.
- Performance Optimization
- Enhance application performance through load balancing, caching, and query optimization to deliver superior user experiences.
- Security & Compliance
- Apply secure coding practices, implement data encryption, and ensure compliance with industry security and privacy standards (e.g., PCI DSS, GDPR).
- Automation & Deployment
- Utilize CI/CD pipelines, Docker/Kubernetes, and monitoring tools for automated testing, deployment, and production monitoring.
- Collaboration
- Partner with front-end developers, product managers, and stakeholders to deliver user-centric, business-aligned solutions.
Requirements
Education
- Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.
Technical Expertise
- 4+ years of hands-on experience with Python frameworks (Django, Flask, FastAPI).
- Proficiency in RESTful APIs, GraphQL, and asynchronous programming.
- Strong knowledge of SQL/NoSQL databases (PostgreSQL, MongoDB) and big data tools (Spark, Kafka).
- Familiarity with Kibana, Grafana, Prometheus for monitoring and visualization.
- Experience with AWS, Azure, or Google Cloud, containerization (Docker, Kubernetes), and CI/CD tools (Jenkins, GitLab CI).
- Working knowledge of testing tools: PyTest, Selenium, SonarQube.
- Experience with API integrations, booking flows, and payment gateway integrations (travel domain knowledge is a plus, but not mandatory).
Soft Skills
- Strong problem-solving and analytical skills.
- Excellent communication, presentation, and teamwork abilities.
- Proactive, ownership-driven mindset with the ability to perform under pressure.
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.
Location: Bengaluru
Experience Required: 2+ Year
Employment Type: Full-time
About the Role
We are looking for a passionate and motivated ** Software Engineer** with hands-on experience in the Software development (MongoDB, Express.js, React.js, Node.js,sql)**. The ideal candidate should have strong coding skills, a good grasp of modern web development practices, and excellent communication and work ethics.
Key Responsibilities
- Develop and maintain scalable web applications using the (javascript,MongoDB, Express.js, React.js, Node.js,sql)
- Collaborate with cross-functional teams to define, design, and ship new features
- Write clean, efficient, and well-documented code
- Debug and resolve technical issues across the stack
- Participate in code reviews and contribute to team knowledge sharing
- Stay up to date with industry trends and emerging technologies
Required Skills & Qualifications
- 2+ year of professional experience as a Software Developer
- Proficiency in JavaScript, ES6+, and TypeScript (optional but a plus)
- Solid understanding of MongoDB, Express.js, React.js, and Node.js
- Experience with RESTful APIs and third-party integrations
- Familiarity with version control systems like Git
- Strong problem-solving and debugging skills
- Good communication skills and a team-player mindset
- Strong sense of ownership and work ethics
Preferred Skills
- Experience with cloud platforms like AWS, GCP, or Azure
- Familiarity with CI/CD pipelines and DevOps practices
- Exposure to testing frameworks like Jest, Mocha, or Cypress
-Prior experience working in a fintech company is a strong advantage.
How to Apply ?
Fill in the form below or
You can directly walk-in to our office in Bangalore
Date: 29-03-2025
Time: 10 Am to 12 Pm
Form link: https://forms.gle/PMJMUvz48pTPZeUu5
Location: Paywize Technologies Pvt. Ltd.
M.R Complex, 7th Cross, 6th Main Rd, BTM 2nd Stage, Bengaluru, Karnataka 560076
Join us and be part of the fintech revolution!
Job Brief:
- Proficient in object-oriented programming and distributed systems
- Some experience with Web Programming and TypeScript
- Ability to speak and write in English fluently
- A proactive approach to spotting problems, areas for improvement, and performance bottlenecks
- Experience with TypeScript and NodeJS
- Experience with the language server protocol
- Experience with JavaScript
- Experience with the Pub-Sub pattern
• Proven working experience in backend app development and experience with Node JS.
• Build advanced ecommerce backend applications for the multiple client platforms (both React and Android).
• Understanding of design principles and good architecture patterns.
• Proper Data Structures and Algorithm knowledge is a must.
• Graph QL and Apollo Server knowledge.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Work with outside data sources and APIs like the one of Unicommerce.
• Create Unit-test code for robustness, including edge cases, usability, and general reliability.
• Work on bug fixing and improving application performance.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• Translate designs and wireframes into high quality code.
• Have a good understanding of CI/CD tools (any).
• Robust knowledge of popular databases like MongoDB, Elastic Search, DynamoDB, Redis etc;
• Knowledge about AWS Services like EC2, Lambda, Kinesis, Redshift, S3 is super plus.
MUST HAVE
• CI/CD
• 3+ years in Node JS
• HTML, CSS, JavaScript
• MongoDB, Elastic Search, DynamoDB, Redis
• AWS Services like EC2, Lambda, Kinesis, Redshift, S3 is super plus.
• Data Structures and Algorithm knowledge is a must.
Key aspects of this role:
- Maintain, update, and enhance ITSM environment including Incident, Request, Problem, Change and Knowledge Management, Service Catalog, Service Portals, SLAs, Discovery, and Integrations
- Participate in the implementation and configuration of other ServiceNow products outside of ITSM to increase the adoption of the ServiceNow platform. • Responsible for performing daily administration, issue resolution, and troubleshooting of the ServiceNow platform. Monitor health, usage, and overall compliance of ServiceNow and its applications.
To be the right fit, you will need:
- Minimum of 2 years of demonstrated experience in ServiceNow development and configuration.
- Proficient in developing, integrating and maintaining applications using ServiceNow Platform technology and tools.
- Understanding of and experience working with IT Service Management processes (Incident, Problem, Change, Release, SLM, Service Catalog), PPM/ITBM• Understanding of IT and business requirements with ability to develop, test, deploy improvements, and update Manage and administer lists, filters, forms, platform interfaces (to other data sources) and the data within tables, import sets and the CMDB.
- Preferably certified in ServiceNow
- Participate in brainstorming and technical ideation for projects with product, growth, and engineering
- You will design Scalable and Fault-Tolerant systems
- You will help Maintain critical and auxiliary systems (databases, cache ...)
- You will build Experiments that help validate hypotheses for the product
Experience:
2+yrs In your first 3 months, you will…
- Successfully onboard and create strong bonds with the current team
- Participate in brainstorming and technical ideation for projects with product, growth, and engineering
- Contribute to existing product features and experimentation
In your first 6 months, you will…
- Develop prototypes of new features or products using rapid iteration and experimentation as we explore new ideas
- Partner across the engineering team to ship features
In your first year, you will...
- Champion best-in-class engineering practices and systems for an emerging engineer team
- Help build a suite of features for the product
Our Ideal Hire:
- Learned best practices and has experienced the challenges and joys working at a startup
- Managed and maintained production code at increasing scales
- Feels strongly motivated by our mission
- Communicates complex problems and proposes solutions, in writing and in conversation
Expertise:
- Proficiency in any one language (ex: NodeJS / Go / Python)
- MySQL (design / indices / optimizing queries)
- Redis (types/ functionality/ use cases)
Hands-on experience:
- Handled scaling issue
- Good at debugging
Good to have:
- Kafka (or other stream-processing software)
- AWS
Do not apply if you are not:
- Ownership driven
- Curious in general
- Able to explain things in simple terms
- Self-motivated
- Use to work in the chaotic environment
- Highly proactive
- Willing to Mentor and humble to ask for collaboration
- Most important, Learn & Grow yourself!
- Hungry to grow anymore









