
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

About Fulfil.IO
About
Connect with the team
Similar jobs
About koolio.ai
Website: www.koolio.ai
koolio Inc. is a cutting-edge Silicon Valley startup dedicated to transforming how stories are told through audio. Our mission is to democratize audio content creation by empowering individuals and businesses to effortlessly produce high-quality, professional-grade content. Leveraging AI and intuitive web-based tools, koolio.ai enables creators to craft, edit, and distribute audio content—from storytelling to educational materials, brand marketing, and beyond—easily. We are passionate about helping people and organizations share their voices, fostering creativity, collaboration, and engaging storytelling for a wide range of use cases.
About the Full-Time Position
We are seeking a Junior Backend Engineer (Fresher) to join our team on a full-time, hybrid basis. This role is ideal for motivated recent graduates eager to gain hands-on experience in backend development. Working closely with senior engineers, you’ll play a vital role in enhancing koolio.ai’s backend infrastructure, focusing on building, maintaining, and optimizing server-side applications and APIs. This is a unique opportunity to grow within an innovative environment that values creativity and technical excellence.
Key Responsibilities:
- Assist in developing and maintaining backend services and APIs, ensuring stability, scalability, and performance
- Collaborate with the frontend and QA teams to ensure seamless integration of backend systems with user-facing features
- Help troubleshoot and resolve backend issues, working alongside senior developers to enhance system reliability
- Participate in code reviews, learning best practices and contributing to maintaining high code quality standards
- Support in monitoring and improving backend performance metrics
- Document processes, code, and system architecture under guidance to ensure comprehensive, up-to-date technical resources
Requirements and Skills:
- Education: Degree in Computer Science or a related field
- Work Experience: No prior work experience required; internships or academic projects related to backend development are a plus
- Technical Skills:
- Basic understanding of backend systems and APIs
- Working experience in Python
- Familiarity with basic version control systems like Git
- Knowledge of databases (e.g., MySQL, MongoDB) and basic proficiency in SQL
- Understanding of cloud platforms or services like Google Cloud is an advantage
- Soft Skills:
- Eagerness to learn and apply new technologies in a fast-paced environment
- Strong analytical and problem-solving skills
- Excellent attention to detail and a proactive mindset
- Ability to communicate effectively and work in a collaborative, remote team
- Other Skills:
- Familiarity with basic DevOps practices or interest in learning is beneficial
Compensation and Benefits:
- Total Yearly Compensation: ₹4.5-6 LPA based on skills and experience
- Health Insurance: Comprehensive health coverage provided by the company
Why Join Us?
- Be a part of a passionate and visionary team at the forefront of audio content creation
- Work on an exciting, evolving product that is reshaping the way audio content is created and consumed
- Thrive in a fast-moving, self-learning startup environment that values innovation, adaptability, and continuous improvement
- Enjoy the flexibility of a full-time hybrid position with opportunities to grow professionally and expand your skills
- Collaborate with talented professionals from around the world, contributing to a product that has a real-world impact
Job Title: Back-End Developer
Department: IT
Experience: 3.5 Years+
Location: Mohali
Shift: Rotational Shifts
Employment Type: Full-time
Job Overview:
The Senior Backend Developer will be responsible for the full lifecycle of our backend services, focusing on architecture, security, and performance.
Key Responsibilities:
- Core API Development & Logic: Design, build, and maintain robust, scalable, and secure RESTful/ GraphQL APIs using Node.js and Python to serve both internal and external consumers.
- System Architecture: Lead the design and implementation of application components, focusing on microservices architecture, ensuring services are loosely coupled and highly available.
- Database Management: Expertly manage and optimize complex database schemas and queries for both SQL (PostgreSQL/MySQL) and NoSQL (MongoDB/Redis) systems, ensuring data integrity and high performance.
- Performance and Scalability: Identify and resolve performance bottlenecks, implement caching strategies, and optimize server-side code and architecture for maximum speed and scalability.
- Code Quality and Standards: Write clean, efficient, well-documented, and testable code. Conduct thorough code reviews and mentor junior developers on best practices, design patterns, and coding standards.
- Security Implementation: Implement security and data protection settings,including authentication, authorization, and encryption protocols.
- DevOps and Deployment: Work with DevOps pipelines (CI/CD, Docker, Kubernetes) for smooth and automated deployment of services to cloud platforms (AWS/Azure/GCP).
- Collaboration: Work closely with cross-functional teams (Frontend, Product, QA) to understand requirements and translate them into technical specifications and deliver high-quality features.
Required Skills & Qualifications:
- Programming Expertise: Deep, demonstrable expertise in Node.js and Python.
- Node.js: Strong command of asynchronous programming, event loops, and related frameworks (e.g., Express.js).
- Python: Extensive experience with web frameworks (e.g., Django, Django Rest Framework, Flask).
- API Design: Proven ability to design and implement highly performant and secure RESTful APIs. Experience with GraphQL is a strong advantage.
- Databases: Expert knowledge of both Relational (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB, Redis, Cassandra). Proficiency in query optimization and schema design.
- Cloud & Tools: Experience with cloud computing platforms (e.g., AWS, Azure, or GCP). Proficiency with Docker and Git.
- Testing: Strong experience with unit, integration, and end-to-end testing frameworks.
Soft Skills & Leadership
- Problem-Solving: Excellent analytical and problem-solving skills with a track record of troubleshooting complex production issues.
- Communication: Strong verbal and written communication skills to articulate technical decisions and collaborate effectively with diverse teams.
- Ownership: Proven ability to take ownership of complex projects, drive them to completion, and manage technical debt.
What kind of work will you get?
We are looking for a Python developer.
Examples of technical tasks:
Working on our backend SDK to implement APIs that will be consumed by the frontend widgets
Designing APIs for different auth recipes
Architecting auth flows
You will also be given non technical tasks like product brain storming, competitor analysis and writing documentation.
Note: Compensation is as per the applicant's geography
Requirements
Well versed in Python with 2+ years of professional experience
Familiar with and comfortable working with Web frameworks like FastAPI, Django and Flask
Familiar with HTTP networking in Python
Strong understanding of async and sync modes in Python
Bonus:
Contributed to open source, or have your own open source repo with a community and many github stars
Built an in-house authentication or authorization solution or worked with solutions such as Keycloak, Auth0, Ory, Okta etc
Job Details:-
Designation - Backend Developer
Urgently required. (NP of maximum 15 days)
Location:- Mumbai
Experience:- 2-4 years.
Package Offered:- Rs.4,00,000/- to Rs.7,00,000/- pa.
Experience required in Node.js & PostgreSQL
Backend Developer
Job Description
Responsibilities
- Participate in the entire application lifecycle, focusing on coding and debugging
- Must have a clear understanding of Databases
- 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, AWS, Postgres
- 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
- Working knowledge of CMS framework
- Familiarity with front-end languages (e.g. HTML, JavaScript)
- Excellent analytical and time management skills
- Teamwork skills with a problem-solving attitude
2+ years of .NET Development experience
- Exceptional skills Experience with .NET, technologies (WPF, Web Forms, .NET Core). Also skilled in MS SQL and PostgreSQL, Bootstrap and DevOps.
- Experience with DevExpress, Elasticsearch.Net, VS Studio is preferred SolarSearch
- Great business process understanding and written and verbal communication skills
- GitHub and Git experience.
They are working on using drones to neutralize terrorists hidden in deep forests.
Responsibilities
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
Requirements
Work experience as a Python Developer
Expertise in at least one popular Python framework (experience in Flask preferred)
Knowledge of object-relational mapping (ORM)
Familiarity with front-end technologies (like JavaScript and HTML5)
Team spirit
Good problem-solving skills
BSc in Computer Science, Engineering or relevant field
What we are looking for:
Strong Coding and design skills
Good command over Data Structures & Algorithms
The ability to produce bug-free and production-grade code
Skills we consider: MYSQL, Python, Django, MongoDB, React.JS, Angular.JS, D3.Js, Node.js, Express.JS, InfluxDb, Redis, Kafka, Garafana, Elastic Search, Docker, AWS, Java, Spring Boot, C++
Key Deliverables:-
1. Develop a very high sense of ownership, the zeal to build scalable applications
2. Develop a deep understanding of the start-up ecosystem
Work with a performance-oriented team driven by ownership and open to experiments
3. Build a customer-facing technology product for global customers
Design and develop end to end applications with very high quality
What we have to offer:-
1. Work with a performance-oriented team driven by ownership and open to experiments
2. Learn to design systems for high accuracy, efficiency, and scalability
Focus on delivering quality work within deadlines.
3. Candid culture. No politics.
4. As a team, we value ownership, continuous learning, consistency, and discipline.










