



Card91 is simplifying business payments by providing a plug and play issuance infrastructure
to businesses for domestic and cross-border payments. Our full stack platform enables
businesses to gain control and visibility into their payment flows, controlling the entire payment
lifecycle from onboarding, to issuance, to transaction and data reconciliation. The platform
aims to provide holistic solutions around payment issuance and distribution management. Our
deep focus in payments will help us in bringing new issuance formats as well as technologies
to businesses.
The company has been founded by seasoned technology entrepreneurs who have founded
successful companies like Myntra, Mastiff Technologies earlier. Headquartered in Bangalore,
with presence in Mumbai and NCR, Card91 aims to disrupt the payment infrastructure space
in the issuer-processor segment.
Position: Python Developer
We are building our core team which will be responsible for a highly scalable, always available
microservices based backend for payment processing. The developer will be involved with the
design, implementation, and execution from day one and build a robust, secure, and scalable
payment processing engine.
Roles & Responsibilities
● Individual Contributors talking full ownership of the micro services
● Design and Implement the micro services from scratch
● Be creative and always try to evaluate new strategies to execute faster
● Team player and always eager to teach new team members about the code,
● structure and design
● Not afraid of bringing new designs (even languages) which will make the system
execute faster
Experience and Qualifications
● Having 2 - 5 years of experience
● Degree from a premier institute like IIT/NIT/BITS is desirable
● A strong expertise in Python framework (like Django, Flask or Pyramid)
● Experience in creating APIs with design standards, patterns and best-practices
● Knowledge of object-relational mapping (ORM)
● GoLang experience is a big plus
● Experience building web services in REST
● knowledge and hands-on experience in API security standards and implementation
(Oauth, OpenId)
● Experience in developing highly scalable and reliable web applications, including
integration with internal and external systems.
● Experience in databases like MySQL and NoSQL db like Cassandra, etc.
● Experience with Cloud computing AWS & Microservices architecture
● Exposure to front end technologies like VueJS, ReactJS etc is an advantage
● Docker & Kubernetes experience is a big plus
● Previous experience of Fintech company is an added advantage
What’s on offer
● Vibrant, fun and rewarding culture that nurtures and promotes excellence
● Opportunities to learn and interact with payment industry leaders
● Competitive remuneration, group health insurance & PF
● Other office perks of being part of an early-stage startup
Location: HSR Layout, Bangalore

About Card91
About
Connect with the team
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Configuring Odoo: Configuring the Odoo framework to meet the client's requirements
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Providing support: Providing ongoing support and guidance to clients, including user training and documentation
Communicating with clients: Communicating with clients about the project's status and ongoing tasks
Helping with pre-sales: Helping the business development team with pre-sales activities
Solving customer issues: Analyzing and solving complex customer issues related to data and processes
Demonstrating to clients: Making demonstrations to existing and prospective clients
Good knowledge of ERP Software
Expertise in the following areas: Inventory, Accounting, CRM. Sales, Purchase Management, Human Resources
Manufacturing


We are seeking an experienced Senior Backend Engineer to join our passionate team. If you have a strong background in backend development, a track record of delivering scalable and reliable solutions, and are eager to contribute to complex projects, we would love to hear from you.
Responsibilities:
- Design and develop robust, high-performance backend solutions using Python and related technologies.
- Lead the architecture and design discussions for major backend components and services.
- Collaborate closely with cross-functional teams to gather and analyze software requirements.
- Mentor and guide junior and mid-level engineers, fostering their technical growth.
- Review code and provide constructive feedback to ensure code quality and adherence to best practices.
- Identify and address performance bottlenecks, scalability challenges, and technical issues.
- Participate in sprint planning, task estimation, and agile development processes.
- Keep up-to-date with industry trends, tools, and best practices to continuously improve our backend systems.
- Drive the adoption of coding standards, design patterns, and engineering best practices.
- Collaborate with frontend engineers to ensure seamless integration between frontend and backend components.
Requirements:
- Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent experience).
- Minimum of 4 years of professional experience in backend development.
- Strong proficiency in Python and backend frameworks like Django and Flask.
- In-depth knowledge of database systems, both relational (MySQL) and NoSQL (MongoDB, etc. ).
- Proven track record of designing and developing scalable and maintainable backend services.
- Experience with RESTful API design and best practices.
- Solid understanding of software architecture, design principles, and software development lifecycle.
- Previous experience leading or mentoring engineers is a strong plus.
- Strong problem-solving skills and a proactive attitude towards challenges.
- Excellent communication skills, both verbal and written.
- Familiarity with cloud platforms (e. g., AWS, Azure, GCP) and containerization (Docker) is a plus.

What You'll Do :
You will be a part of our backend team working on keeping our REST API and GraphQL API up and running and making sure that our users get the right data at the right time.
You will have ownership of developing and maintaining our backend services including users, courses, and operations tools that manage our product and logistics.
You will work on architecting and scaling highly-available RESTful services and back-end systems from scratch.
This is a position for an experienced Node programmer with at least 2 years under the belt, but you don't have to be a rock star, a ninja, or a superhero to apply.
What You'll Need :
You will fit well in the backend team if you are passionate about technology and have experience programming in Node. Knowledge of technologies like Cassandra, Elasticsearch, PostgreSQL, REST and JSON will help you get going from day one.
As an experienced Node developer, you should be intimately familiar with the platform, with
JavaScript, and with the stables of full-stack web development : HTTP, JavaScript, CSS, HTML, SQL.
It's a bonus if you're broadly familiar with other languages as well- we write some services in Go and have data pipelines written in Python- but your main work will be JavaScript through and through.
You will be a perfect match with our team if you love collaborating with people from all disciplines to solve complex problems, always want to learn new skills and take ownership of your work.
- Understand the fundamentals of Software Engineering, such as Data Structures, Algorithms, Design Patterns
- Ability to write Java applications using Spring, Springboot or any other microservices frameworks
- Experience in the development of REST applications, in Java or Kotlin
- Capable of writing effective APIs
- Solid knowledge of JVM fundamentals such as classloading, memory management, garbage collection
- Demonstrated experience in platform API design and development
- Knowledge on microservice and event-driven architecture
- Experience in working with version control frameworks such as Git (preferable), SVN
- Experience with NoSQL databases (MongoDB or Cassandra) & Relational Databases
- Solid understanding of TDD & Agile principles such as CI / CD, with a proven track record of implementing solutions centred around those concepts
- Excellent communication, collaboration, reporting, analytical and problem solving skills

The candidate will be responsible for working on .NET based projects for our clients in USA. The candidate must be self-motivated and quick learner. The candidate should also be able to communicate with the client on a regular basis and gather requirements from the client, provide updates. The work would be in ASP.NET / VB.NET and C# with SQL Server databases. The candidate will be responsible for maintaining existing web applications as well as implement new applications based on client requirements.
Required Experience, Skills and Qualifications
- Must have 3+ years experience in ASP.Net with C# and VB.NET
- Must have at least 2 years experience in SQL Server
- Must have experience working with SOAP and REST Web Services
- Must have experience with SSRS and SSIS
- Must have some experience with MVC framework and Angular JS
- Must be able to work with basic CSS and HTML
- Must be able to work with jQuery and Javascript
- Experience with Reporting Services, WCF, etc would be a strong positive
Ecperience- Minimum 3 years
Location - Ahmedabad



YOUR RESPONSIBILITIES
- Development and unit testing of web applications including back-end (microservices), maintenance & level 3 support of the same
- Assist Project Managers, Business Analysts, and Tech Lead in project planning (provide estimates, risk analysis, requirements analysis, technical options)
- Software Architecture
- Involvement in full life cycle of projects (including requirement analysis and system design, development and support if required)
- Support and work collaboratively with teams across areas of design, development, quality assurance and operations
- Commit your knowledge and experience into team success
- A small amount of travel (when needed) to work with other offices
- Attend meetings to discuss and demonstrate solutions at both technical and business level
REQUIRED SKILLS AND EXPERIENCE
- 5+ years web application development experience
- 3+ years developing with Python
- 3+ years developing with C# and .NET Framework 4.x
- Experience with ASP.NET MVC, ASP.NET WebAPI 2, LINQ, and WCF
- Dependency Injection and other common ASP.NET MVC design patterns
- Experience with API design and development using REST
- Experience with performance optimization
- Experience integrating security best practices into the SDLC
- Experience with object-oriented programming (OOP) and OOP patterns
- Experience with Git
- 1+ years of Agile development experience
- Experience manipulating and working with data in a variety of forms: csv, xml, json, structured and unstructured
- Experience with SQL database schema design and querying. Microsoft SQL Server and PostGreSQL are used and preferred.
DESIRABLE SKILLS AND EXPERIENCE
- Knowledge of JIRA, Bamboo, Confluence, or BitBucket is a plus.
- Experience with a JavaScript MVVM library such as Web Components, knockout.js, Angular, React, etc. is a plus (Web Components and knockout.js are used and preferred)
- Experience with HTML5/CSS3/JavaScript/ and AJAX is a plus
- SPA (Single Page Application) design and implementation is a plus
- Experience with any ORM such as Entity Framework or NHibernate is a plus (NHibernate is preferred)
- Experience with TypeScript is a plus
- Experience with MS Build is a plus
- Experience with CI/CD is a plus
- Experience with Object Mapping Frameworks (AutoMapper, etc) is a plus
- Understanding of OOD, DDD and TDD is a plus
- AWS-based development is a plus
- Knowledge of Flask is a plus.
PERSONAL SKILLS
- Clever personality
- Strong spirit skills set: conflict resistant, self -motivated, result-oriented, responsible, honest, “open”, courageous
What You’ll Do
- Experience working in eCommerce industry managing high volume applications with an experience of 7 yrs or more.
- Expertise in application development with IBM (Sterling) Order Management Fulfillment Suite with a minimum of 4 to 5 yrs of experience.
- Implementation Experience in Sterling order management with versions greater than 9.0 is preferred. Experience in XML, XSD, SOAP and REST services.
- Expertise in at least one application server; Websphere MQ or JBoss or Weblogic.
- Subject matter expertise in building large-scale retail B2C web applications using Supply Chain and Logistics Systems.
- IBM Sterling Order Management System Configuration Deployment Toolkit (Sterling CDT), Global Inventory Visibility. Caching technologies is a plus.
- Comprehensive SDLC experience including strong design skills use of UML, patterns.
- Agile and waterfall implementation principles and practices.
- Use of version control management such of SVN, CVS, or GIT.
- Production environment deployment and maintenance.
- Provide support in troubleshooting / investigations pertaining to the order management systems.
- Respond quickly to critical requests.
- Ability to analyze and design data model. Solid hands-on understanding of DB for the Web environment.
- Performance tuning and optimization for scalability and high availability.
- Upgrading experience on IBM Sterling Order Management System to 9.3 or higher is a plus.
- Experience working on Omni Channel Implementations with IBM Sterling OMS is a plus.
- Exposure towards Cassandra is a plus.
What You Know
- Set your ECommerce skill set to work, helping to execute business requirements into specific systems, applications, or processes in business-to-consumer (B2C) environments.
- Showcase your in-depth technical knowledge and functional knowledge in IBM Sterling OMS building confidence at client place.
- Train and guide new team members on Sterling technical and business concepts.
- Able to support in design or POC s to solve business problems in IBM Sterling OMS for new client initiatives.
- Should be excited to work on projects that require both Sterling and Java/J2ee.
- Build services around Sterling using Java, Rest and SOAP web services. Should be very strong in core Java.
- Should be having fair idea in building unit tests around the code implemented.
- Knowledge on continuous integration is needed.
- You will also ensure that the organization's implementations meet the scalability and reliability required for eCommerce operation, as well as analyze and optimize database and core commerce functions for maximum performance.
Education
- Bachelor’s / Master’s degree in specific technical fields like computer science, math, statistics preferred; or equivalent practical experience

Job Summary
- Ability to handle multiple responsibilities and prioritize in a dynamic environment.
- Should be able to manage the whole project solely or in a team.
- To develop and deploy new features, modules and write bug free code for the web-based applications.
- To optimize pre-written PHP Code and MySQL queries bringing efficiency to the overall project.
- Test, debug, clean the code and review the code written by other team members.Required Candidate profile:
- Must have good working knowledge of MVC Structure like Codeigniter and Laravel
- Must have good knowledge of technologies like AJAX, JavaScript, jQuery, HTML / CSS
- Must have good understanding of MySQL / MySQLi, Should be able to write MySQL queries, joins, optimization etc.
- Must be comfortable working with WAMP/LAMP Environment.
- Must have experience with GIT / GITHUB.
Optional skills:
- Clarity on OOPs Concepts.
- Create, implement and maintainence of Web Services using both REST and SOAP API.
Responsibilities and Duties
- Ability to handle multiple responsibilities and prioritize in a dynamic environment.
- Should be able to manage the whole project solely or in a team.
- To develop and deploy new features, modules and write bug free code for the web-based applications.
- To optimize pre-written PHP Code and MySQL queries bringing efficiency to the overall project.
- Test, debug, clean the code and review the code written by other team members
Required Experience, Skills and Qualifications
- Must have good working knowledge of MVC Structure like Codeigniter and Laravel
- Must have good knowledge of technologies like AJAX, JavaScript, jQuery, HTML / CSS
- Must have good understanding of MySQL / MySQLi, Should be able to write MySQL queries, joins, optimization etc.
- Must be comfortable working with WAMP/LAMP Environment.
- Must have experience with GIT / GITHUB.

We, the Products team at DataWeave, build data products that provide timely insights that are readily consumable and actionable, at scale. Our underpinnings are: scale, impact, engagement, and visibility. We help
businesses take data driven decisions everyday. We also give them insights for long term strategy. We are focused on creating value for our customers and help them succeed.
How we work
It's hard to tell what we love more, problems or solutions! Every day, we choose to address some of the hardest data problems that there are. We are in the business of making sense of messy public data on the web. At
serious scale! Read more on Become a DataWeaver
What do we offer?
- Opportunity to work on some of the most compelling data products that we are building for online retailers and brands.
- Ability to see the impact of your work and the value you are adding to our customers almost immediately.
- Opportunity to work on a variety of challenging problems and technologies to figure out what really excites you.
- A culture of openness. Fun work environment. A flat hierarchy. Organization wide visibility. Flexible working hours.
- Learning opportunities with courses, trainings, and tech conferences. Mentorship from seniors in the team.
- Last but not the least, competitive salary packages and fast paced growth opportunities.
Roles and Responsibilities:
● Build a low latency serving layer that powers DataWeave's Dashboards, Reports, and Analytics
functionality
● Build robust RESTful APIs that serve data and insights to DataWeave and other products
● Design user interaction workflows on our products and integrating them with data APIs
● Help stabilize and scale our existing systems. Help design the next generation systems.
● Scale our back end data and analytics pipeline to handle increasingly large amounts of data.
● Work closely with the Head of Products and UX designers to understand the product vision and design
philosophy
● Lead/be a part of all major tech decisions. Bring in best practices. Mentor younger team members and
interns.
● Constantly think scale, think automation. Measure everything. Optimize proactively.
● Be a tech thought leader. Add passion and vibrancy to the team. Push the envelope.
Skills and Requirements:
● 5-7 years of experience building and scaling APIs and web applications.
● Experience building and managing large scale data/analytics systems.
● Have a strong grasp of CS fundamentals and excellent problem solving abilities. Have a good understanding of software design principles and architectural best practices.
● Be passionate about writing code and have experience coding in multiple languages, including at least one scripting language, preferably Python.
● Be able to argue convincingly why feature X of language Y rocks/sucks, or why a certain design decision is right/wrong, and so on.
● Be a self-starter—someone who thrives in fast paced environments with minimal ‘management’.
● Have experience working with multiple storage and indexing technologies such as MySQL, Redis, MongoDB, Cassandra, Elastic.
● Good knowledge (including internals) of messaging systems such as Kafka and RabbitMQ.
● Use the command line like a pro. Be proficient in Git and other essential software development tools.
● Working knowledge of large-scale computational models such as MapReduce and Spark is a bonus.
● Exposure to one or more centralized logging, monitoring, and instrumentation tools, such as Kibana, Graylog, StatsD, Datadog etc.
● Working knowledge of building websites and apps. Good understanding of integration complexities and dependencies.
● Working knowledge linux server administration as well as the AWS ecosystem is desirable.
● It's a huge bonus if you have some personal projects (including open source contributions) that you work on during your spare time. Show off some of your projects you have hosted on GitHub.


