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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Experience and Expertise
● 7– 10 years of experience in backend development with Python or Golang.
● Solid understanding of RESTful APIs, microservices, and distributed systems.
● Strong knowledge of data structures, algorithms, and OOPS principles.
● Hands-on experience with relational and/or NoSQL databases.
● Familiarity with Linux development, Docker, and basic cloud concepts
(AWS/GCP/Azure).
● Proficiency with Git and version control workflows.
● Familiarity with AI-powered development tools or exposure to projects involving large
language models (LLMs) is a plus.
Skills
● Strong analytical and debugging skills with the ability to solve complex problems.
● Good communication and collaboration skills across teams.
● Ability to work independently with minimal supervision while being a strong team
player.
● Growth mindset – eagerness to learn new technologies
* Strong practical knowledge and interest in modern AI tools.
* Genuine curiosity and willingness to continuously learn.
* Ability to research, experiment, implement, troubleshoot and improve independently.
* Good understanding of prompting and AI workflows.
* Strong problem-solving mindset.
* Basic understanding of APIs, integrations and automation.
* Ability to explain technology clearly to non-technical people.
* Comfortable using AI to solve real-world business problems.
Position Overview:
We are seeking a skilled Java Developer to join our dynamic team. The ideal candidate will have a strong foundation in Core Java and extensive experience in developing and deploying applications using Spring Boot, Apache Tomcat, and other related technologies. The candidate should possess expertise in building Restful Web Services, Microservices architecture, and be proficient in implementing multi-threading concepts.
Additionally, experience with Maven, Git, Jenkins, and Agile Scrum methodologies is essential for this role. The candidate should also have a solid understanding of software development lifecycle (SDLC) processes. Familiarity with various databases such as MySQL, PostgreSQL, Oracle, or MongoDB, along with third-party API integration and payment gateway integration, is required.
Key Responsibilities:
• Develop, test, deploy, and maintain Java-based applications.
• Design and implement Restful Web Services and Microservices using Spring Boot.
• Utilize multi-threading concepts to enhance application performance.
• Integrate third-party APIs and payment gateways into applications.
• Collaborate with cross-functional teams to gather requirements and deliver high-quality solutions.
• Participate in Agile Scrum ceremonies and contribute to sprint planning, backlog grooming, and retrospectives.
• Ensure adherence to best practices and coding standards.
• Conduct code reviews and provide constructive feedback to peers.
• Troubleshoot and debug complex issues in production environments.
• Document design decisions, processes, and procedures.
Required Qualifications:
• Bachelor’s degree in computer science, Engineering, or related field.
• Minimum 3 years of experience as a Java Developer with expertise in Core Java.
• Strong knowledge of Spring Boot, Apache Tomcat, and multi-threading concepts.
• Hands-on experience in building Restful Web Services and Microservices architecture.
• Proficiency in using Maven, Git, and Jenkins for build and deployment processes.
• Familiarity with Agile Scrum methodologies and SDLC processes.
• Experience working with databases such as MySQL, PostgreSQL, Oracle, or MongoDB.
• Demonstrated ability to integrate third-party APIs and payment gateways.
• Excellent problem-solving and analytical skills.
• Effective communication and collaboration skills.
• Familiarity with NoSQL databases like MongoDB.
• Knowledge of Azure DevOps for CI/CD pipelines
Job Description:
- Experience in Core Java, Spring Boot.
- Experience in microservices.
- Extensive experience in developing enterprise-scale systems for global organization. Should possess good architectural knowledge and be aware of enterprise application design patterns.
- Should be able to analyze, design, develop and test complex, low-latency client-facing applications.
- Good development experience with RDBMS in SQL Server, Postgres, Oracle or DB2
- Good knowledge of multi-threading
- Basic working knowledge of Unix/Linux
- Excellent problem solving and coding skills in Java
- Strong interpersonal, communication and analytical skills.
- Should be able to express their design ideas and thoughts.
About Wissen Technology:
Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals.
Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always ‘first time right’.
Our team consists of 1200+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.
Wissen Technology offers an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
We have been certified as a Great Place to Work® for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.
Your duties include
- Database development using T-SQL on MS SQL Server
- API Development using ASP.Net WEB API and C#
- R & D for available solutions and 3rd party API integrations
- Comparative Analysis of different approaches and finding optimal solutions
- Supporting existing applications in SQL, ASP.NET WEB API, C#, Angular or TypeScript
SKILLS
- Should have hands-on Experience in .NET Core, Asp.Net, MVC, Entity Framework, SQL Server with Good Communication skills.
- Use Microsoft technologies: C#, ASP.NET, SQL, MVC, and Microsoft Workflow to develop technical solutions to complex problems that require the regular use of ingenuity and creativity
- Design, code, test, debug and document software according to the functional requirements
- Develop, maintain and support programs/tools for internal and external clients
- Analyse, diagnose and resolve errors related to their applications
- Help define project plans requiring software development and hardware installations
- Provide technical and project management expertise across multiple areas of application development
- Investigate operational or systematic problems and user queries as required.
- If the candidate has experience in MVC / Angular / Azure / Xamarin, it would be an added advantage.
Education
Bachelor’s or Master’s degree in Computer engineering or relevant field
Students working towards their degree and with sufficient experience will be considered.
Qualifications-BCA, BE/B.Tech(Information Science/Technology (IS/IT)), MCA, ME/M.Tech(Information Science/Technology)
We are looking for an experienced top-notch Python developer to grow with our dev team. As a Python Developer, you will be involved from conception to completion with projects that are technologically sound. Role and Responsibilities
• Expert in Python, with knowledge of at least one Python web framework {such as Django, Flask, etc}
• Familiarity with some ORM (Object Relational Mapper) libraries
• Able to integrate multiple data sources and databases into one system
• Understanding of the threading limitations of Python, and multi-process architecture
• Good understanding of server-side templating languages
• Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3
• Understanding of accessibility and security compliance • Knowledge of user authentication and authorization between multiple systems, servers, and environments
• Understanding of fundamental design principles behind a scalable application
• Familiarity with event-driven programming in Python
• Able to create database schemas that represent and support business processes
• Strong unit test and debugging skills
• Develop and adhere to best-practices for developing applications
• Continuously contribute to team performance improvement and collaboration
• Work and collaborate with the rest of the engineering team
• Work with product team and graphic designers Technical Skills
• Experience in Python and frameworks such as Django, Flask, etc
• Ability to solve problems creatively and effectively
• Git knowledge is a plus
• Experience working in an Agile/Scrum development process
• Team player
• Good time-management skills
• Great interpersonal and communication skills
Qualifications
• B.S Degree in Computer Science
• 4-6 years overall IT industry experience
- Design & build a highly scalable, robust backend architecture for our cloud services
- You will be part of a software development team for developing and enhancing SaaS applications.
- Take responsibility of entire module/feature set and develop, test, debug and maintain the application software throughout the product lifecycle
- Working with the Product Management Team to validate and plan new features
- Working with cross-functional teams to deliver stellar end user experience
- Research new technologies and tools that help in building the next generation of our services
- Test, debug and maintain the application software throughout the product lifecycle
Desired Candidate Profile
- Must have experience with web development in Java 8+, Spring/J2EE or similar frameworks and technologies. (Mandatory)
- Must have worked on REST API (Mandatory)
- Should be an enthusiast for writing clean, reusable code, willing to learn new things as a self-starter person
- 2+ years of strong relevant experience in developing Object-oriented technologies.
- Strong working experience with any of the following DBs - Postgres / MySQL / Oracle or MSSQL
|
Roles and Responsibilities |
● Leads more than one projects end-to-end and collaborates across functions. Drives planning, estimation and execution. ● Manages stakeholder expectations and offers scalable, reliable, performant and easy to maintain solutions ● Consistently delivers complex, well backed and bug-free products in time ● Consistently takes well thought technical/design decisions ● Develops expertise in more than one area and shares knowledge with others. able to mentor/train in areas which are new to them. ● Drives people to solve engineering challenges ● Enjoys high respect of Tech and other cross functional teams ● Demonstrates effective communication with project team, management and internal/external clients as necessary. ● Surfaces both technical and non-technical team challenges and helps resolve them ● Champion for SDLC best practices and high quality standards ● Significantly contributes in hiring high performance candidates |
|
Experience &
Skills |
● Expert at in RoR, Golang, NodeJS or Python. Good to have exposure to ML. ● Must have experience in cloud computing ● Operates independently with almost no oversight ● Is able to apply domain expertise to think critically and make wise decisions for the team, taking into account tradeoffs and constraints. ● Communicates tech decisions through design docs and tech talks ● Has delivered multiple projects with end-to-end engineering ownership ● Keeps track of new technology/tools and embraces them as necessary ● 12+ years of experience in product driven organization ● A Bachelors or Masters degree in engineering from a reputed institute (preferably IITs, NITs, or other top engineering institutes) |
Nice to have: python
Must frameworks and technologies: Springboot, kafka, MQTT, docker/kubernetes, REST APIs
Persistence layer: MongoDB, Elastic Search, Any GraphDB (Neo4j/Arango), SQL, HBase
Must have: Exposure in large scale architecture (Concept of queues, micro services, functional programming)
Must have: Strong Data structure and design principles
Expert in developing Node.js applications, Strong understanding of NPM and modular application development skills building, Proficiency and hands-on experience with Node.js, Express, Sockets, MongoDB/Elasticsearch/Redis/MySQL, Apache Kafka/Google PubSub, Experience of working in MEAN Stack is a plus)










