
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
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Job Type: Full Time
Shift: US Time Zone
About the Role:
We are seeking a talented Senior Python Developer with strong hands-on experience in building agentic systems (multi-agent systems). This role requires expertise in Python, PostgreSQL, and the ability to work on a dynamic platform that supports multi-agent architectures. You will be responsible for developing, enhancing, and maintaining platforms that involve complex agent-based interactions, while also supporting the database systems and overall infrastructure.
Key Responsibilities:
Design, implement, and maintain multi-agent systems to support complex interactions and decision-making processes.
Develop scalable and efficient Python code for integrating and managing agents and their communication layers.
Work extensively with PostgreSQL databases to design schemas, optimize queries, and manage data storage effectively.
Collaborate with cross-functional teams to integrate agentic systems into larger platforms and ensure their smooth operation.
Troubleshoot, debug, and optimize Python-based solutions and database interactions.
Write high-quality, maintainable, and well-documented code.
Provide technical support for the platform, ensuring its scalability and performance over time.
Mentor junior developers and provide technical guidance as needed.
Required Skills and Experience:
5+ years of strong hands-on experience in Python development.
Experience in building and deploying multi-agent systems or agent-based frameworks.
Proficiency in PostgreSQL, including schema design, query optimization, and database management.
Knowledge of agent-based modeling or similar paradigms is highly desirable.
Familiarity with various Python libraries for handling complex algorithms and system integration.
Experience in supporting and maintaining platforms or systems post-deployment.
Strong understanding of software development best practices and version control (Git).
Excellent problem-solving skills and the ability to think algorithmically.
Strong communication skills with the ability to explain complex technical concepts.
Preferred Qualifications:
A degree in Computer Science, Engineering, or a related field.
Experience with cloud platforms (AWS, Azure, etc.) is a plus.
Knowledge of agent communication languages (ACL) or other protocols related to multi-agent systems is beneficial.
Familiarity with Docker, Kubernetes, or other containerization tools.
Strong Full stack/Backend engineer profile
Mandatory (Experience): Must have 2+ years of hands-on experience as a full stack developer (backend-heavy)
Mandatory (Backend Skills): Must have 1.5+ strong experience in Python, building REST APIs, and microservices-based architectures
Mandatory (Frontend Skills): Must have hands-on experience with modern frontend frameworks (React or Vue) and JavaScript, HTML, and CSS
Mandatory (AI): Must have hands on experience with using AI tools (eg: Claude, Cursor, GitHub Copilot, Codeium, Deepdcode) for coding.
Mandatory (Database Skills): Must have solid experience working with relational and NoSQL databases such as MySQL, MongoDB, and Redis
Mandatory (Cloud & Infra): Must have hands-on experience with AWS services including EC2, ELB, AutoScaling, S3, RDS, CloudFront, and SNS
Mandatory (DevOps & Infra): Must have working experience with Linux environments, Apache, CI/CD pipelines, and application monitoring
Mandatory (CS Fundamentals): Must have strong fundamentals in Data Structures, Algorithms, OS concepts, and system design
Mandatory (Company) : Product companies (Preferably Top product companies, AI native companies, B2B SaaS)
Mandatory (Stability): Must have atleast 2 years of experience in each of the previous companies (if less exp, then proper reason)
Mandatory (Note): Candidates who have owned end-to-end product development or worked on app development projects during their graduation will be highly preferred.
Mandatory (Note 2): The role offers a mix of work setups, including remote, Mumbai (in-office), and Bangalore (in-office) opportunities
About the Role
We are looking for a passionate AI Engineer Intern (B.Tech, M.Tech / M.S. or equivalent) with strong foundations in Artificial Intelligence, Computer Vision, and Deep Learning to join our R&D team.
You will help us build and train realistic face-swap and deepfake video models, powering the next generation of AI-driven video synthesis technology.
This is a remote, individual-contributor role offering exposure to cutting-edge AI model development in a startup-like environment.
Key Responsibilities
- Research, implement, and fine-tune face-swap / deepfake architectures (e.g., FaceSwap, SimSwap, DeepFaceLab, LatentSync, Wav2Lip).
- Train and optimize models for realistic facial reenactment and temporal consistency.
- Work with GANs, VAEs, and diffusion models for video synthesis.
- Handle dataset creation, cleaning, and augmentation for face-video tasks.
- Collaborate with the AI core team to deploy trained models in production environments.
- Maintain clean, modular, and reproducible pipelines using Git and experiment-tracking tools.
Required Qualifications
- B.Tech, M.Tech / M.S. (or equivalent) in AI / ML / Computer Vision / Deep Learning.
- Certifications in AI or Deep Learning (DeepLearning.AI, NVIDIA DLI, Coursera, etc.).
- Proficiency in PyTorch or TensorFlow, OpenCV, FFmpeg.
- Understanding of CNNs, Autoencoders, GANs, Diffusion Models.
- Familiarity with datasets like CelebA, VoxCeleb, FFHQ, DFDC, etc.
- Good grasp of data preprocessing, model evaluation, and performance tuning.
Preferred Skills
- Prior hands-on experience with face-swap or lip-sync frameworks.
- Exposure to 3D morphable models, NeRF, motion transfer, or facial landmark tracking.
- Knowledge of multi-GPU training and model optimization.
- Familiarity with Rust / Python backend integration for inference pipelines.
What We Offer
- Work directly on production-grade AI video synthesis systems.
- Remote-first, flexible working hours.
- Mentorship from senior AI researchers and engineers.
- Opportunity to transition into a full-time role upon outstanding performance.
Location: Remote | Stipend: ₹10,000/month | Duration: 3–6 months
Hiring For SDE II - Python (Remote)
The Impact you will create:
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Build campaign generation services which can send app notifications at a speed of 10 million a minute
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Dashboards to show Real time key performance indicators to clients
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Develop complex user segmentation engines which creates segments on Terabytes of data within few seconds
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Building highly available & horizontally scalable platform services for ever growing data
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Use cloud based services like AWS Lambda for blazing fast throughput & auto scalability
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Work on complex analytics on terabytes of data like building Cohorts, Funnels, User path analysis, Recency Frequency & Monetary analysis at blazing speed
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You will build backend services and APIs to create scalable engineering systems.
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As an individual contributor, you will tackle some of our broadest technical challenges that requires deep technical knowledge, hands-on software development and seamless collaboration with all functions.
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You will envision and develop features that are highly reliable and fault tolerant to deliver a superior customer experience.
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Collaborating various highly-functional teams in the company to meet deliverables throughout the software development lifecycle.
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Identify and improvise areas of improvement through data insights and research.
Primary Responsibilities
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End-to-end ownership of product development, from design, through implementation, testing, deployment, and maintenance
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Translating high-level requirements and end-user use cases into design proposals, decomposing complex features into smaller, short-term deliverable tasks
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Maintaining constant focus on scalability, performance and robustness of architecture
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Designing and implementing logging, monitoring and alerting systems for existing and new infrastructure
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Documenting API's and architecture design
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Mentor and guide juniors on their path to become solid developers
What we look for?
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4+ of industry experience in technical leadership roles
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Solid knowledge of Python, SQL, NoSQL, shell scripting and Linux operating environment
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End-to-end experience in design and development of highly scalable enterprise and cloud data products
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Ability to challenge and redefine existing architecture to create robust, scalable and reliable products
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Hands-on experience with design and troubleshooting of scalable web services, queue based systems, distributed databases and streaming services
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Experience with modern DevOps technologies such as kOps, Kubernetes and Docker, CI/CD, monitoring and autoscaling
Job Description:
Responsibilities:
- Completing all tasks set by the supervisor and assisting wherever possible.
- Observing existing strategies, techniques of coding, debugging, testing and adopting to the same
- Ability to maintain composure under pressure
- Ability to work in a team.
- Good observation skills and a willingness to learn.
Skills:
- Proficiency in data structures and algorithms
- Good problem solving and analytical thinking skills
- Knowledge of Linux systems
- Python coding knowledge
- Knowledge of object-oriented programming
- Good verbal and written communication skills.
Requisition Raised by:
Engineering Director
What you'll do?
● Develop on server-side cloud software using a serverless approach (AWS).
● Work hands-on on bringing to life IoT and Edge architectures and applications
● Work with teams on delivering key features and performance targets.
Who You Are?
● Passionate individual who loves to develop scalable backend
● Strong programming capabilities
● Understanding of cloud architecture and protocols.
● Clear thought process, believe in simplifying rather than complicating
● Argue and fight over opinions. Believe in always choosing the best
You Should Have
● Experience on NoSQL Databases and designing REST API.
● Strong fundamentals of Data structure and algorithm.
● Done related projects during graduation/post-graduation.
● Experience on AWS, AWS Lambda, AWS IoT Core, AWS Cloud Watch is a big plus.
Proficiency in Python










