
Fulfil’s software engineers develop the next-generation technologies that change how millions of customer orders are fulfilled by merchants. Our products need to handle information at massive scale. We're looking for engineers who bring fresh ideas from all areas into our technology.
As a senior software engineer, you will work on our python based ORM and applications that scales to handle millions of transactions every hour. This is mission critical software and your primary focus will be building robust and scalable solutions that are easy to maintain.
In this role, you will be collaborating closely with the rest of the team working on different layers of infrastructure in an international environment. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product are important.
What You’ll Do:
- Own definition and implementation of API interfaces (REST and GraphQL). We take pride in our 100% open API with over 600 endpoints.
- Implement simple solutions to complex business logic that enables our merchants to manage financials, orders and shipments across millions of transactions.
- Build reusable components and packages for future use.
- Translate specs and user stories into reviewable, test covered patches.
- Peer review code and refactor existing code.
- Integrate with our eCommerce partners (Shopify, BigCommerce, Amazon), shipping partners (UPS, USPS, FedEx, DHL) and EDI.
- Manage Kubernetes and Docker based global deployment of our infrastructure.
Requirements We’re Looking for Someone With:
- Experience working with ORMs like SQLAlchemy or Django (2-3 years)
- Experience with SQL and databases (Postgres preferred)
- Experience in developing large server side applications and microservices
- Ability to create high quality code
- Experience with python testing tools (pytest) and test automation
- Familiarity with code versioning tools like GIT
- Strong sense of ownership and leadership quality
- Experienced in the tools of our web stack- Python, Celery, Postgres, Redis, RabbitMQ
Nice to Haves:
- Prior experience at a growth stage Internet/Software company
- Experience with ReactJS, Google Cloud, Heroku
- Cloud deployment and scaling experience*

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Job Title : Senior Backend Developer (Node.js + AWS + MongoDB)
Experience : 4+ Years
Location : Andheri, Mumbai (Work From Office)
About the Role :
We are looking for a highly skilled Senior Backend Developer with strong expertise in Node.js (NestJS), AWS, and MongoDB to join our growing engineering team.
This role requires someone who takes ownership, is proactive, and enjoys building scalable, high-performance backend systems in a fast-paced environment.
Key Responsibilities :
- Architect, design, and develop scalable backend services using Node.js (NestJS).
- Design and manage cloud infrastructure on AWS Services (EC2, ECS, RDS, Lambda, etc.).
- Develop and maintain high-performance database solutions using MongoDB.
- Work with Kafka, Docker, and serverless frameworks (SST) for efficient deployments.
- Optimize system performance, scalability, and reliability across services.
- Ensure application security, best practices, and compliance standards.
- Collaborate with cross-functional teams to deliver robust product features.
- Take end-to-end ownership of features from design to deployment.
Technical Requirements :
- 4+ years of backend development experience.
- 3+ years of hands-on experience with Node.js.
- 2+ years of hands-on experience with AWS.
- Strong experience with NestJS framework.
- Solid experience with MongoDB and database design.
- Experience with Kafka, Docker, and serverless architecture.
- Understanding of system design, scalability, and performance optimization.
Good to Have (Bonus Skills) :
- Experience with Python or other backend languages.
- Exposure to Agentic AI use cases or implementations.
- Strong understanding of security best practices.
What We’re Looking For :
- Curious mindset and eagerness to learn new technologies.
- Proactive problem solver with strong ownership attitude.
- Strong team player with effective communication skills.
- Positive, energetic, and passionate about building great systems.
We are looking to expand our existing Python team across our offices in Surat. This position is for SDE-1 - Junior Software Engineer.
The requirements are as follows:
1) Familiar with the the Django REST API Framework.
2) Experience with the FAST API framework will be a plus
3) Strong grasp of basic python programming concepts ( We do ask a lot of questions on this on our interviews :) )
4) Experience with databases like MongoDB , Postgres , Elasticsearch , REDIS will be a plus
5) Experience with any ML library will be a plus.
6) Familiarity with using git , writing unit test cases for all code written and CI/CD concepts will be a plus as well.
7) Familiar with basic code patterns like MVC.
8) Grasp on basic data structures.
- Integration of client-side elements developed by a frontend developers with server side logic
- Building reusable code and libraries for future use
- Test and debug programs
- Coordinate with other team members to understand user requirements and provide technical solutions
Skills and Competencies:
- Proficient knowledge of Python with a backend server framework like Flask or Django
- Understanding accessibility and security compliance from the Business statement & implement them accordingly
- Building API endpoints - Project structuring, build reusable components, etc
- Integration of multiple data sources and databases into the application code
- Creating database schemas that represent and support the business use case
- Experience with building the infrastructure for serving the front-end app and assets would be a value-add
- Experience with scripting for task automation and data analysis
- Basic understanding of front-end technologies and platforms, such as JavaScript, HTML, and CSS would be a value-add
- Professional, precise communication skills
Qualification and Experience:
- B.E. / B. Tech. / MCA / PGDCA / M.Sc. (CS) /M.E. / M. Tech
- At least 2 years of experience in Backend Development
- Proficient knowledge of Python or any other back-end programming language
- Demonstrated experience with Object Oriented design and development
- Experience in working with MongoDB or other NoSQL databases would be a value-add
- Knowledge of Microservices, Dockers, Kubernetes
- Exposure to Google Cloud Platform and/or Amazon Web Services
Must have exp in Django. [ Mandatory]
- The ability to problem-solve and critically think.
- High level of knowledge of Python and the Django framework.
- Familiarity with event driven programming as well as the MVC.
- Good understanding of SQL databases.
- Good understanding of REST APIs.
● Should have 6+ years of experience as a software developer
● Good experience with Nodejs & Express js.
● Good with MySQL
● Experience with Linux Scripting
● Experience with elastic search and Logstash
● Experience with cyber security
● Great interpersonal and communication skills candidate can work independently
● Agile project methodology experience preferred.
● Excellent communication skills.
● Critical thinker and good problem-solver.
● Good time-management skills
● Great interpersonal skills
Working Timings: 3:00 pm to 12:00 am (midnight)IST
*Performs analysis of functional and business requirements
*Applies in-depth or broad technical knowledge to maintain data engineering functions performs solution design.
*Applies the company, open source, and 3rd party technologies to highly complex infrastructure and software solutions.
*Introduce new product features and enhance the platform
*Ability to translate business reporting requirements into a production report.
- 2+ years of Hands-on experience in Python, Django, Flask, Bottle, Design Patterns, Web Services (SOAP/HTTP, REST APIs)
- 2+ years of hands-on experience with Postgress, MongoDB.
- Experience with cache-store / message broker like Redis / RabbitMQ / Kafka
- Experience with AWS
- Experience in front-end development using react.js is a plus.
- Proficient understanding of code versioning tools, such as Git / Mercurial /bitBucket.
- DevOps knowledge to deploy code in production and hands-on experience with docker / Kubernetes.
- Self-motivated and a good team player.
- Good communication and interpersonal skills.
- Bachelor’s Degree in Engineering from a reputed Institute
The Backend Developer will be working alongside other Software Developers, Project Managers,
QA, Software Architects and DevOps in order to shape and implement the technology and product
deliverables that will drive forward the strategy of our venture
Key responsibilities include:
Working with the Team in building world class recommendation
Brain-storming and experimenting with new ideas for efficiently improving the service
Writing effective, low-latency and high-availability, and scalable Python codes.
Working with System Layered Services like Virtualization, Network Management and core
OS Technologies
Working on Creating Pipe-lines and Services necessary for Critical Real Time Systems
Required Competencies:
3+ years of experience with a track record of delivering quality results
Strong Knowledge in OOPS, Data Structures, Algorithms, Networking Concepts, OS
Concepts
Experience in successfully building Microservices, Server Services etc at scale
Experience in working with Cloud Technologies and possibly bare-metal hardware
Have knowledge on Virtualization, Kafka Streaming, Networking Protocols, Web Crawling,
Caching, Routing Algorithms etc
About Us:
• Rainbox a media-tech start-up, focusing on content aggregation, Search/Discovery &
recommendation.
• Our core Product is Oneplay, which provides universal search & discovery of contents across
multiple OTTs, Personalised Recommendations, Live TV Content Tracking & EPG and lots more,
becoming a single destination for all entertainment a user need.
• Oneplay’s newest project is the ‘Netflix of Gaming’: In past 5 years we have seen how OTT has
changed the overall media/entertainment industry, likewise the next entertainment viewership is
changing from watching live cricket to watching live game streamers. so looking at the market
trend our company is about to start cloud gaming.
- Work experience as Python developer
- Should have experience in developing and working on consumer facing web/app products on in Django framework
- Should have experience working with react js front end design.
- Thorough knowledge of data stores, MyScore AWS services and should have experience with EC2, ELB, AutoScaling, CloudFront, S3
- Experience in Frontend codebases using HTML, CSS and Javascript
- Good understanding of Data Structures, Algorithms and Operating Systems
- Good experience of developing and integrating APIs
- Knowledge of object-relational mapping (ORM)
- Able to integrate multiple data sources and databases into one system (mysql)
- Understanding of front-end technologies, such as JavaScript, HTML5, and CSS3
- Proficient understanding of code versioning tool (git)
- Good problem-solving skills








