
Senior Software Engineer (Python)
Job description
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
- 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 Us:
Fulfil.io helps high growth, high volume merchants simplify operations and scale for growth. With the rise in omni-channel commerce, Fulfil was founded with the simple idea that merchant operations need to be simplified in order to deliver amazing retail experiences. Fulfil enables businesses to turn their back office operations into an accelerator for growth by integrating order management, inventory management, warehouse management, vendor/supplier management, wholesale, manufacturing, financials and customer service, into one seamless solution. We believe merchants should love their operations platform, and we work hard to make that happen every single day. Fulfil.io is a trusted solution for brands like EndySleep, Mejuri, Lie-Nielson Toolworks, and many more.
Fulfil.io is a venture backed technology company with offices in San Francisco, Toronto, and Bangalore. The team is made up of people who want to feel challenged at work, be the best at their craft and learn from one another. We come from different backgrounds and experiences, all passionate about the work we do, the team we do it with, and the customers we do it for. Join us in our journey to simplify operations and empower merchants around the world!

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About the Role
Qiro is building the infrastructure powering the next generation of underwriting, credit analytics, and tokenized private credit markets.
We are looking for a Tech Lead — Credit & Blockchain Infrastructure to lead the architecture and execution of our core systems — spanning underwriting engines, credit lifecycle workflows, and blockchain-integrated capital markets infrastructure.
This is not a feature delivery role. This is a system ownership role.
You will be hands-on while leading a growing engineering team in a fast-moving, in-office environment.
What You’ll Own
- Define and evolve the long-term technical vision for Qiro’s programmable credit infrastructure — architecting cohesive systems that unify underwriting engines, credit lifecycle workflows, and tokenized capital markets.
- Own the end-to-end architecture of scalable backend platforms (Python and/or TypeScript), establishing clear boundaries between risk logic, platform APIs, and smart contract integrations while ensuring scalability, auditability, and extensibility.
- Build and standardize configurable underwriting and credit lifecycle systems — from onboarding and drawdown orchestration to repayment waterfalls and early closures — ensuring deterministic, traceable financial state transitions at institutional scale.
- Set integration and infrastructure standards across API contracts, data models, validation layers, and event-driven architectures, enabling reliable synchronization between off-chain services and on-chain contracts.
- Architect secure and resilient blockchain integrations, including wallet interactions, capital flow coordination, and observable on-chain/off-chain state reconciliation.
- Lead high-impact, cross-product initiatives from RFC and system design through production launch — validating architectural decisions, aligning stakeholders, and delivering measurable improvements in reliability, performance, and developer velocity.
- Elevate reliability and operational excellence by defining SLOs, strengthening CI/CD and observability practices, reducing latency, and minimizing systemic risk in financial workflows.
- Build and scale the engineering organization — mentoring senior engineers, shaping hiring standards, driving architecture reviews, and fostering a culture of ownership, craftsmanship, and first-principles thinking.
- Partner closely with Product, Design, Security, and Operations to translate complex lending and capital market mechanics into simple, robust platform primitives.
Who You Are
- 6-8+ years of engineering experience, with 3+ years in technical leadership roles.
- Strong backend architecture experience in Python and/or TypeScript.
- Comfortable designing distributed systems and financial workflows.
- Experience building fintech, lending, underwriting, trading, or blockchain-integrated systems.
- Strong understanding of API design, state management, and data modeling.
- Able to navigate ambiguity and build 0→1 infrastructure.
- Hands-on builder who leads by writing production-grade code.
We Value
- Experience with underwriting engines or policy-driven decision systems.
- Exposure to smart contracts and blockchain integrations.
- Familiarity with PostgreSQL and event-driven architectures.
- Experience in early-stage or high-growth startups.
- Strong product thinking and ability to translate complex financial logic into scalable systems.
Why Join Qiro
- Lead the architecture of a programmable credit infrastructure platform.
- Join the founding technical leadership team.
- High autonomy and ownership — your decisions shape the company.
- In-office collaboration in Bangalore for speed and iteration.
- Competitive compensation and meaningful equity.
Our Culture
We operate with:
- First-principles thinking
- Technical craftsmanship
- High ownership
- Fast execution with long-term architectural discipline
Job description
🔧 Key Responsibilities:
- Design and implement robust backend services using Node.js.
- Develop and maintain RESTful APIs to support front-end applications and third-party integrations
- Manage and optimize SQL/NoSQL databases (e.g., PostgreSQL, MongoDB, Snowflake)
- Collaborate with front-end developers to ensure seamless integration and data flow
- Implement caching, logging, and monitoring strategies for performance and reliability
- Ensure application security, scalability, and maintainability
- Participate in code reviews, architecture discussions, and agile ceremonies
✅ Required Skills:
- Proficiency in backend programming languages (Node.js, Java, .NET Core)
- Experience with API development and tools like Postman, Swagger
- Strong understanding of database design and query optimization
- Familiarity with microservices architecture and containerization (Docker, Kubernetes)
- Knowledge of cloud platforms (Azure, AWS) and CI/CD pipelines.
Good knowledge of Python frameworks such as Django, CherryPy, etc.
Good understanding of REST API
Experience with JavaScript, jQuery, HTML and CSS
Build back-end features in Python that are efficient.
Integrate front-end and back-end components into the application
Develop integrations with third party applications (mostly web-based).
Working Knowledge of SQL and databases.
Bachelor’s Degree in Computer Science Engineering or other related fields.
Understand the needs of the client and Implement functional requirements accordingly.
Agile development methodology
Good communication (verbal and written)
Our Client is B2B SaaS Product Co. in the space of HR Technology. They are helping organisations to take informed decisions in the areas like Hiring, Training and Career Succession processes. The company was formed in 2010 and since has become a market leader in HR technology space. The founders are alumni of Stanford University and their employees have experience in working with PWC, McKinsey and other similar leagues of organisations.With a bright vision of the founders, the organisation is in an expansion mode to capture niche markets and become a global leader in this domain.
- Experience in Back-End development using Ruby on Rails or NodeJS
- Experience in working on at least two of MongoDB / Postgres / MySQL & Redis
- Experience on MVC patterns using frameworks like Rails, ExpressJS
- Strong understanding of RESTful APIs and HTTP protocol
- Understanding Security aspects of the applications and can successfully implement OWASP compliant systems
- Strong understanding of Linux OS, File Systems, Firewalls etc
- 3 years Experience in Ruby on Rails
- Minimum 3 years in MongoDB / PostgreSQL
- Must be from Product based companies
*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.
- Manage and improve the engineering process continuously and make sure the team delivers the quality code with zero-waste.
- Should provide technical leadership to major projects, but also build and manage a team of 5-8 top-notch engineers.
- Should do sprint planning and run daily stand-ups and deliver 100% hit rate.
- Maintain the legacy code base and reduce tech debt on a continuous basis.
- Able to handle multiple projects and deliver with stringent timelines without compromising the code quality.
- Work with the product team for roadmap planning and delivery as per the plan.
- Conduct sprint planning & sizing, engineering grooming, daily stand-ups, and deliver with zero spillovers.
- Prepare & publish sprint reports to the leadership team and provide visibility to stakeholders.
- Hire and mentor junior/ senior team and make them engineering champions.
- Mentor the engineering team with your technical skills to write scalable, generic, reusable code.
- Develop and Coach engineers on the team, share engineering pointers, conduct regular 1-1s with the team, and help them advance in their careers.
Requirements
- Having work experience in a Product organization with 7 -10 yrs also in leading a cross-functional engineering team that includes API Development and Backend & Middleware development.
- Should have experience in the continuous delivery process. Ship new features and improvising the code base continuously.
- Should have involved in setting up engineering process.
- Must have experience in microservices and distributed patterns.
- Must have worked on high traffic and throughput application.
- Must have prior experience in handling mid to large-size projects.
- Must have worked on high traffic and throughput application.
- Should have managed and lead the engineering team of Web App and Backend development teams.
- Must-Have Experience in Python programming & Postgressql/ Nosql (MongoDB as a data store.
- Must have experience in modern back-end tech stacks (Django, Postgress, NoSQL) and cloud design & deployment patterns.
- Must be conversant with AWS, Docker/Kubernetes
- Should be good with design patterns and integration patterns.
- Should have knowledge/ experience in concurrent programming & distributed locks.
- Requires solid understanding of technologies and architecture in a highly scalable and available set-up.
- Should have handled multiple epics, themes, and experience of delivering high-quality projects on time.
- Should have managed end to end development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations
Design, Develop and Test applications running in the cloud.
Work in sprints, within a highly motivated, self-organizing team to produce quality software
according to the priorities laid down by the application stakeholders.
Design innovative solutions to problems faced by our internal and external customers and
implement them on continuously evolving applications.
Write Unit tests to ensure code is proven to work before being deployed to Test environments.
Use defensive coding to ensure software is developed with a secure approach.
Provide input on best practices and innovations across all aspects of our software development.
Provide our customers with Applications that can satisfy their needs, working as part of the team
to address issues that customers may encounter as they go about their business.
Required Experience and Skills :
A minimum of 6 years of software development experience
In-depth knowledge of C#
Hands-on experience with ASP. NET MVC Framework
Strong knowledge and experience in designing and developing Web solutions using ASP.
NET MVC Framework
Rich experience in creating REST-based web-services using ASP. NET Web API or ASP.
NET Core
Working experience of Relational Databases (MS SQL, Oracle nice to have), ORM (Entity
Framework, EF Core)
Affinity with unit and integration testing frameworks and TDD
Knowledge of Azure cloud and DevOps pipeline nice to have
Analyze, plan and estimate requirements as well as identify risks involved and provide
solutions
Understanding of design principles behind scalable and testable applications
Continuous improvement and innovative mind-set.
Ability to take a lead role and take ownership of complex data integration deliveries.
A degree in Computer Science and/or a business related degree; or equivalent work experience.
Senior Developer
NOTE- we are looking for those who can join immediately or within 15-20 days of notice period.
Senior Dev with 5 years relevant experience
1. Working experience on web development using Python/Django
2. Comfortable with using Django framework.
3. Understanding of web servers
4. Knowledge in PostgreSQL, MySQL, and other database queries
5. Experience in using Redis cache.
6. Understanding of web technologies
7. Experience in REST API development using Django.
8. Strong hold on Apache
9. Integration of data storage solutions
10. Able to integrate multiple data sources and databases into one system
11. Understanding of JavaScript, and front-end JS frameworks like VueJS, React JS and Angular JS
12. Good communication skill
13. .net/.NET core will be an added advantage
Required Skills
- Proficiency in CS concepts such as Data Structures, Algorithms and Operating systems.
- More than 2 years of experience in a development Team with very good knowledge and hands-on experience using Java technologies.
- Knowledge of Java MVC Framework Spring MVC / Spring Boot.
- Good SQL and NoSQL skills
- Knowledge of/experience developing Web APIs using RESTFUL services.
- Deep expertise in at least one programming language & tech stack to write maintainable, scalable, unit-tested code - preferably Java.
Good to Have
- Strong object-oriented design skills, knowledge of design patterns, and an uncanny ability to design intuitive module and class-level interfaces.
- Participation in open source projects.
- Active involvement in solving problems on Github, Stackoverflow and similar other community groups
- Hands on experience on PubSub patterns such as Kafka / RMQ
- Experience with full life cycle development in any programming language on a Linux platform
Responsibilities and Duties
- You will translate high level business problems into scalable design and code.
- Create libraries & Utilities for larger consumption.
- Should understand and have knowledge on the application security practices/vulnerabilities.
- You will write performant, unit-tested code, develop object-oriented models and design data structure for new software projects taking systems aspects into account.








