Senior Python Engineer - Remote at Fulfil.IO · Remote only · 4 - 8 years · ₹10L - ₹15L / yr · Profitable · Remote only · Posted 25 Feb 2022

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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Nature of Assignment
• We are looking for an experienced Senior Software Engineer – Backend Development to develop and enhance enterprise-grade scientific and workflow-driven software solutions. The role requires strong technical expertise in Python-based backend
development, API design, microservices, and modern software engineering practices.
• As a senior member of the engineering team, you will own the design, development, testing, and delivery of complex software components while collaborating closely with Product Management, Quality Engineering, Front-End Development, DevOps, and global engineering teams. The ideal candidate is passionate about building high-quality software, solving complex technical problems, and delivering reliable, maintainable, and scalable solutions.
Key Responsibilities
• Design, develop, and maintain scalable, secure, and high-performance backend applications using Python, FastAPI, and Uvicorn.
• Design and implement RESTful APIs, Backend-for-Frontend (BFF) services, and microservices that support complex business workflows and enterprise integrations.
• Drive modernization initiatives by refactoring legacy applications into modular, cloudready, service-oriented architectures.
• Implement robust business logic, validation, exception handling, asynchronous processing, data persistence, reporting, and workflow orchestration following industry best practices.
• Ensure secure coding practices by applying web application security principles, authentication and authorization standards, and vulnerability mitigation techniques.
• Own end-to-end delivery of features from requirement analysis and technical design through development, testing, deployment, and production support.
• Analyze, troubleshoot, and resolve complex product, integration, and production issues using logs, debugging tools, and root-cause analysis techniques.
• Develop comprehensive unit, integration, API, and regression tests to ensure software quality and reliability.
• Support CI/CD processes, deployment validation, release readiness, and environment verification activities.
• Contribute to technical documentation, API specifications, and knowledge-sharing initiatives.
• Collaborate closely with Product Management, UI teams, QA, DevOps, and Architecture teams to deliver high-quality software solutions.
• Mentor junior engineersthrough code reviews, technical guidance, and knowledge sharing.
Qualification/s
• Bachelor’s/master’s degree in computer science, Software Engineering, Information Technology, or a related discipline.
Technical Expertise
• Strong hands-on software development experience in Python backend development.
• Extensive experience developing REST APIs using FastAPI, Uvicorn, and modern Python ecosystem frameworks.
• Strong understanding of microservices, distributed systems, API-first design, and Backend-for-Frontend (BFF) architecture.
• Proficiency in Object-Oriented Programming (OOP), SOLID principles, design patterns, and clean code practices.
• Solid experience in asynchronous programming, dependency injection, API validation, exception handling, and performance optimization.
• Strong knowledge of web application security including OAuth2, JWT, OpenID Connect, SSO, secure coding practices, OWASP principles, and vulnerability remediation.
• Strong knowledge in Logging, Monitoring & Troubleshooting – Production support, observability, performance tuning, and root-cause analysis.
• Hands-on experience with Git, branch management strategies, pull requests, and collaborative development workflows.
• Experience building and maintaining CI/CD pipelines using modern DevOps tools and automated release processes.
• Hands-on experience in testing frameworks such as PyTest and automation of units, integration, API, and regression testing.
• Experience with SQL /NoSQL databases, data modeling, query optimization, and backend data management.
• Strong debugging, analytical, and problem-solving skills with the ability to diagnose issues across applications, infrastructure, and deployment layers.
• Experience independently leading technical initiatives and delivering production grade software solutions
• Excellent collaboration and communication skills within cross-functional Agile teams
SR. PHP Developer
Experience: 4+ Years
Location : Ahmedabad - WFO
JOB DESCRIPTION
Position Requirements:
- Strong experience in Back-End Web Development, Object-Oriented Programming (OOP).
- Must have 4+ years of experience in Laravel, CodeIgniter, or other MVC frameworks
- Should have knowledge of Agile Process & Knowledge of Web Application Security concepts.
- Database experience of at least one of the following: PostgreSQL or MySQL.
- Must have experience of Laravel Queue Jobs, Seeders, Migration and factory files, Service Providers.
- Should have Experience of creating schedules and artisan commands in Laravel.
- Should be very strong with Object Oriented concepts, design and architecture.
- Basic Database conceptual knowledge such as DDL, DML and their usages.
- Knowledge of Ecommerce, payment gateway, Webhooks & API integration.
- Identify and correct bottlenecks and fix bugs
- Experience with Google Map API, Firebase API, and AWS is plus.
- Proficient understanding of code versioning tools (such as Git, Bitbucket)
- Experience with agentic coding workflows using tools like Claude Code, Cursor, or similar AI-assisted development environments is a plus.
Founding Engineer (Bangalore)
The problem:
Business enterprises overpay vendors - on every batch of invoices, on every month because the data that would catch lives in different systems. We are building an AI agent that processes invoices end-to-end, reasons across all the relevant sources, flags genuine discrepancies, and acts - without a human having to investigate each one.
What you will own
Everything engineering. Schema design to deployment to the 2am fix when something breaks in production. There is no tech lead above you. There is no platform team. There is the architecture, you, and the founders. Concretely, this means building:
- A multi-stage agentic pipeline that takes a vendor invoice and produces a structured decision - fully autonomous for clear cases, escalating to human review for genuinely ambiguous ones. We use LangGraph, but if you've built equivalent systems with Temporal, Prefect, or custom state machines with LLM orchestration, that works
- An LLM-powered extraction layer that handles real invoices - scanned PDFs, stamped documents, inconsistent layouts - and returns structured output
- A graph data model that connects invoices to various sources and can traverse those relationships to detect discrepancies
- ERP connectors, GST validation logic, and a write-back layer that closes the loop
What we need
- Strong Python. Async FastAPI, clean service boundaries, tests that actually catch bugs. You have shipped Python backends that handled real production load
- Solid Postgres. Complex queries, schema design, migrations without downtime, row-level security for multi-tenant data. pgvector is a plus - if not, you pick it up fast
- LLM API experience in production. You have called an LLM API for something that real users depended on. You know about structured output, retry logic, cost management, prompt versioning. A side project counts if it was genuinely deployed
- Comfort with graph data models. You understand when a graph is the right structure and when it is not. You do not need deep Neo4j production experience - you need to understand graph relationships conceptually and be willing to learn Cypher. It is a 2-day ramp for the right person
- Working knowledge of deployment. Deployed and operated production workloads on GCP. Cloud Run, Cloud SQL, Cloud Storage, Redis — you're comfortable across the stack. If you've done it on AWS, the translation isn't hard, but GCP is where we are
- You own things. Not "I contributed to" - you designed it, shipped it, and fixed it when it broke. That pattern needs to be visible in your history
Good to have, not mandatory
- Built an agentic pipeline with multiple stages
- Any fintech, P2P domain experience - even tangential
- Worked at a startup with under 20 people
- Has a GitHub, blog, or writeup that shows how you think about a hard technical problem
What you get
- The hardest engineering problem you would have worked on. This is not CRUD with an LLM bolted on
- Real ownership. First engineering hire. Your architectural decisions will be in this product five years from now
- Equity that matters. ESOP - Open to discussion. We are pre-seed - this is a bet, not a guarantee. We will not pretend otherwise
- No meetings tax. You work directly with the founders. The product is specified clearly. You know what you are building and why
Honest about stage: We do not have a production ready infra yet. We have a complete architecture specification and a working prototype. If you need the stability of an established engineering org, this is not the right moment. If you want to build something real from zero and own a meaningful piece of it, it is.
The founders
One of us has spent 20 years building revenue and operational engines at companies where there was no playbook - part of the pilot team that established the world's largest search company's direct sales operations in India, managed global operations for a global mobile advertising platform, scaled a B2C platform to become one of India’s leading edtech platforms and most recently worked on building an enterprise Agentic Voice AI platform. The other has spent 15 years taking AI from demo to production in domains where failure is expensive - voice, lending, and conversational systems across a Series D conversational AI company, a major telco, a Big 4, and a leading NBFC.
Two IIT/IIM alumni who have both watched AI work in enterprise, and know exactly what it takes to get it there. We are not building this product because it sounds interesting. We are building it because we have both sat across the table from CFOs who know they are losing margin and have no tool capable of doing anything about it.
Prelude
We are BeyondScale, on a mission to build the mobile learning app to help organizations create internal courses for their workforce easily. eLearning is booming and we aim to tap into the under-served non-IT L&D market and make a difference in the livelihoods of millions of people.
We’re now looking for a passionate “Django Developer” who is willing to join us at an early stage and help us build a world-class product.
Django Developer
Job Description:
- 2+ years of experience coding with Python.
- Design, build, and maintain efficient, reusable, and reliable code.
- Eager and proactive to learn new technical skills.
- Hands-on experience in developing web APIs and writing database queries in PostgreSQL (MongoDB, MySQL and DynamoDB is a plus).
- Good understanding of OOPs, Multiprocessing and threading.
- Proficient in testing and debugging programs.
- Well-versed with Git and modern development workflow practices
Key Responsibilities:
- SDLC development of product features, enhancements, UAT/production issues.
- Work with development team members for development of product features.
- Client-side and server-side development.
- Develop and manage well-functioning databases and application.
- Write/ design product APIs and write unit test cases.
- Follow standard agile scrum practices for software development.
- Peer review, pull requests, code refactoring and managing source code per standards and ensure quality.
Required Experience & Skills:
- 5+ years of software development experience using Microsoft .Net technology stack.
- Strong experience in .Net, .Net Core, C#, Entity Framework, SQL server, JavaScript, jQuery, etc.
- Experience in using unit test framework e.g., xUnit, Moq.
- Experience in Web API development.
- Experience in Agile / SCRUM development process.
- Good to have experience in Domain driven design development and Microservice architecture.
- Excellent communication and teamwork skills
- Good to have knowledge and experience in ABP.IO framework, Angular 8+, PostgreSQL and AWS cloud service and CI/CD process.

Job Description for Senior Python Developer
Experience: 4 to 7 years
- Must have strong knowledge in Python 2/Python 3
- Must have a strong knowledge of Web development using the Django web framework and API development experience using Django REST API.
- Flask framework or any other framework’s knowledge is great.
- Ability to write reusable, testable, and efficient code
- Team Handling exposure
- Knowledge of Standard databases like MySql, PostgreSQL and NoSQL databases like MongoDB, Firebase, etc. Able to create database schemas that represent and support business processes.
- Understanding of fundamental design principles behind a scalable application
- Must be good at understanding client requirements.
- Good testing/debugging skills using standard python modules/IDEs
- Deployment experience with standard servers like Apache/AWS etc.
- Experience in testing frameworks known in the industry.
- Having good/basic knowledge of Front end Technologies HTML, CSS, Bootstrap, JavaScript is good.
- Proficient understanding of code versioning tools - GIT
The candidate must have experience in coding part and team handling experience both
Python API DeveloperJD:
Experience: 4-6 Yrs
Notice Period: 10-20 days or within 1 month
>> Develop and maintain various security software products with queues, caching & database management.
>> Hands-on experience in Coding in Python is required along with Knowledge about Data Structures and object-oriented programming, Algorithms.
>> Extensive experience in developing asynchronous systems.
>> Integration of user-facing elements developed by front-end developers with server-side logic
>> Implementation of security and data protection.
>> Performance tuning, improvement, balancing, usability, automation
Mandatory Skills:
- Python
- Flask/Django
- API
Requirements
- Experience in open source technologies - Solr, Redis, Kafka
- Exposure to building & managing applications in Amazon Webservices (AWS)
- Experience in security, scalability & performance aspects of solution
- Critical Skills: 1. Java / J2EE, Spring, PostGreSQL 2. Nginx, Tomcat 3. Developing REST webservices
Desired Skills and Experience
- Spend most of your time developing brand new software in Python
- Build out a secure data replication infrastructure to replicate transactional data across a hierarchical system
- Build out APIs for supporting a fleet of 20k devices
- Build out a configurable data analytics and reporting framework
- Build out real time dashboards for getting a high level and deep dive view of the overall system
- Be responsible for independently designing and building out modules of the overall system
- Work with a team of smart peers and take ownership of the resulting system
- Push yourselves, create impact, learn and grow as an engineer








