Software Engineer-SDE III at O4S · Delhi, Gurugram, Noida · 5 - 9 years · ₹20L - ₹30L / yr (ESOP available) · Raised funding · Posted 28 Dec 2020
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
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Required Skills & Qualifications
- 4+ years of professional experience in backend development with Python.
- Strong hands-on experience with FastAPI (or Flask/Django with migration experience).
- Familiarity with asynchronous programming in Python.
- Working knowledge of version control systems (Git).
- Good problem-solving and debugging skills.
- Strong communication and collaboration abilities.
- should have a solid background in backend development, RESTful API design, and scalable application development.
Shift: Night Shift 6:30 pm to 3:30 AM IST
We are a dynamic and innovative technology company dedicated to delivering cutting-edge solutions that empower businesses and individuals. As we continue to grow and expand our offerings, we are seeking a coding fanatic, who is interested in working on and learning new technologies.
Position - Backend developer
Job type - Freelance or on contract
Location - Remote
Roles and Responsibilities:
- Plan,create and test REST APIs for back-end services such as authentication and authorization.
- Deploy and maintain backend systems on the cloud.
- Research and develop solutions for real life business problems.
- Creating and maintaining our apps' essential business logic, providing correct data processing and flawless user experiences.
- Database design, implementation, and management, including schema design, query optimisation and data integrity.
- Participating in code reviews, providing constructive input, and ensuring that code quality standards are met.
- Keep abreast of industry developments and best practices to bring new solutions to our initiatives.
Required skills and experience -
Must have skills : -
- Bachelor’s degree in computer programming, computer science, or a related field.
- 3 + years of experience in backend development.
- Proficient in Python,Mongodb,postgres/sql,Django and Flask
- Knowledge on nginx.
- C++/C +Cython for creating python modules
- Knowledge on Redis
- Familiarity with using AI provider apis and prompt engineering
- Experience in working with linux based instances on the cloud.
- Strong problem solving and verbal and written communication skills.
- Ability to work independently or with a group.
Good to have skills :-
- Experience in node.js and Java
- AWS and Google cloud knowledge.
Not just a delivery company
RARA NOW is revolutionising instant delivery for e-commerce in Indonesia through data-driven logistics.
RARA NOW is making instant and same-day deliveries scalable and cost-effective by leveraging a differentiated operating model and real-time optimisation technology. RARA makes it possible for anyone, anywhere to get same day delivery in Indonesia. While others are focusing on one-to-one' deliveries, the company has developed proprietary, real-time batching tech to do many-to-many' deliveries within a few hours. RARA is already in partnership with some of the top eCommerce players in Indonesia like Blibli, Sayurbox, Kopi Kenangan and many more.
We are a distributed team with the company headquartered in Singapore, core operations in Indonesia and technology team based out of India
Future of eCommerce Logistics.
Data driven logistics company that is bringing in same day delivery revolution in Indonesia
Revolutionising delivery as an experience
Empowering D2C Sellers with logistics as the core technology
**About the Role**
Integration of user-facing elements developed by front-end developers with server side logic
Implementation of security and data protection
Integration of data storage solutions
Strong proficiency with JavaScript
Knowledge of Node.js and frameworks available for it
Understanding the nature of asynchronous programming and its quirks and workarounds
Good understanding of server-side templating languages and CSS preprocessor
Basic understanding of front-end technologies, such as HTML5 and CSS3
User authentication and authorization between multiple systems, servers, and environments
Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform
Implementing automated testing platforms and unit test
Strong technical development experience in effectively writing code, performing code reviews, and implementing best practices on configuration management and code refactoring
Experience in working with vendor applications
Experience in making optimized queries to MySQL database
Proven problem solving and analytical skills
A delivery-focused approach to work and the ability to work without direction
Experience in Agile development techniques, including Scrum
Experience implementing and/or using Git
Ability to work collaboratively in teams and develop meaningful relationships to achieve common goals
Bachelor degree in Computer Science or related discipline preferred
We are hiring!!
JOB TITLE: Back-end Developer
EXPERIENCE: 3 - 7 years
LOCATION: Mumbai (Borivali East)
TIMINGS: Indian Shift Timings
TYPE OF WORKING: Work from office
NOTICE PERIOD: 1 month
Responsibilities
- Participate in the entire application lifecycle, focusing on coding and debugging
- Must have a clear understanding of Database
- Write clean code to develop functional web applications
- Troubleshoot and debug applications
- Perform UI tests to optimize performance
- Manage cutting-edge technologies to improve legacy applications
- Collaborate with Front-end developers to integrate user-facing elements with server-side logic
- Gather and address technical and design requirements
- Provide training and support to internal teams
- Build reusable code and libraries for future use
- Liaise with developers, designers and system administrators to identify new features
- Follow emerging technologies
Requirements
- Proven work experience as a Back-end developer
- Experience in Node.js language
- Familiar with building REST API
- In-depth understanding of the entire web development process (design, development and deployment)
- Hands on experience with programming languages like Java, Ruby, PHP and Python
- Working knowledge of CMS framework
- Familiarity with front-end languages (e.g. HTML, JavaScript and CSS)
- Excellent analytical and time management skills
- Teamwork skills with a problem-solving attitude
Job Responsibilities:
- Create standard RESTful APIs
- Define API models
- Define Database models
- Communicate with other teams about breaking changes
- Maintain code quality
- Optimizing services for maximum performance
Requirements: 5+ years of work experience
- Advanced understanding of SQL ( NoSQL is a plus)
- Proficient understanding of Node.js
- Willingness to learn new ways of doing things
- Experience exposing functionality through RESTful APIs and GraphQL
- Perform performance tuning and query optimization using native SQL Server tools
- Ensure performance, security, and availability of databases
- Should be familiar with the AWS ecosystem and services
- Experience in deployment of scalable, low-latency, and highly available distributed systems
- Experience with Scrum/Agile development
- Expertise in Web API is most preferable.
- Good experience needed in Angular 4+ implementation.
- Must have very good exposure and experience working with C#,ASP.Net,MVC, Entity Framework,Web Service,Java Script, jQuery and SQL Server.
- Strong Knowledge of software implementation best practices.
- Strong experience in debugging and working with n-tier arctitecture (UI,Business layer and Data Access layer) along some experience with service oriented arctitectures(SOA)
- Ablity to design and optimise SQL server stored procedures.
- Solid understanding of object oriented programming (OOP)








