
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
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Job Description:
Engage in code design, testing, integration, deployment, and enhancements
Write high-quality code and take responsibility for tasks
Solve performance bottlenecks
Communicate and collaborate with product manager, QA, and UI/UX teams
Deliver with quality, on-time in a fast-paced start-up environment
Have a strong sense of code quality
Candidate Profile:
Bachelor’s/Master’s degree in Engineering, Computer Science (or equivalent experience)
At least 5+ years of relevant experience as a back-end engineer
Excellent Java and object-oriented development skills
Experience in building and scaling microservices
Strong problem-solving skills, technical troubleshooting, and diagnosing
Solid knowledge of RDBMS and NoSQL technologies
Experience in developing back-ends for enterprise systems
Knowledge of debugging performance and optimization techniques
Experience in Java, Mongo, MySQL, AWS technologies, ELK stack, Spring boot, Kafka
Good knowledge of cloud technologies eg. AWS
Demonstrated ability to deliver in a fast-paced environment
1. Work experience between 3 years to 9 years in building large scale high user traffic consumer facing applications with desire to work in a fast paced startup.
2. Knowledge on reactive and asynchronous programming is preferable. If you have worked with coroutines, goroutines, high concurrency or optimized number of threads for processing on your backend server you could be a good fit.
3. Extremely proficient at writing performant, scalable and production ready code in Kotlin, Java (8 or above, comfortable with concepts like lambda, streams, multithreading etc), Elixir, Rust, or Golang. Should be familiar with static code analysis, code coverage and code reviews.
4. Experience with NoSQL DBs like MongoDB, Cassandra, Redis or Aerospike is required. Knowledge of graph DBs like Neo4j is preferred.
5. Strong in algorithms, problem solving and data structures.
6. Knowledge of TDD and experience with building applications integrated with CI-CD pipelines (automated build, tests and deployments).
7. Exposure to micro-services with good understanding of containers, kubernetes, logging, alerting and monitoring. Inter services communication. Should know how to handle multiple versions of APIs.
Responsibilities:
- Setup and integrate various APIs
- Dealing with scripts written in different languages (PHP, Node.js, Python, PhantomJS, Ruby)
- Must be an R & D specialist
- Keep up-to-date with advanced concepts
- Adaptable to learn new technologies
- Knowledge on Linux and its commands
- Fast in debugging the code
- Should be a quick learner
- Good at communication
Requirements
- Minimum 3 Years of experience in PHP7
- 1 Year experience in Node.js/Python
- Good work experience in PHP7
- Strong knowledge in OOPS.
- Proven knowledge on REST and SOAP API integrations
- Experience in composer installations
- Strong in Javascript and Node.js concepts.
- Good knowledge of MongoDB and MySql
- Knowledge of versioning tools (SVN/GIT)
- Having knowledge on Amazon AWS and Google Cloud Platform is an added advantage
- Having knowledge of elastic search is an added advantage
- Good to have knowledge on p threads
• Develop, record and maintain cutting edge web-based PHP applications with Vue.js as the front-end framework.
Build innovative, state-of-the-art applications and collaborate with the User Experience (UX) team
• Ensure HTML, CSS, and shared JavaScript is valid and consistent across applications using Vue.js or similar front end frameworks.
• Prepare and maintain all applications utilizing standard development tools.
• Utilize backend data services and contribute to increase existing data services API.
• Lead the entire web application development life cycle right from concept stage to delivery and post launch support.
• Convey effectively with all task progress, evaluations, suggestions, schedules along with technical and process issues.
• Document the development process, architecture, and standard components.
• Coordinate with co-developers and keeps project manager well informed of the status of development effort and serves as liaison between development staff and project manager.
• Keep abreast of new trends and best practices in web development.
• In depth knowledge of object-oriented PHP and Laravel 5 PHP Framework
• Hands on experience with SQL schema design, SOLID principles, REST API design
• Software testing (PHPUnit, PHPSpec, Behat)
• MySQL profiling and query optimization
PHP / Laravel developer duties and responsibilities
- Develop, record and maintain cutting edge web-based PHP applications on portal plus premium service platforms
- Build innovative, state-of-the-art applications and collaborate with the User Experience (UX) team
- Ensure HTML, CSS, and shared JavaScript is valid and consistent across applications
- Prepare and maintain all applications utilizing standard development tools
- Utilize backend data services and contribute to increase existing data services API
- Lead the entire web application development life cycle right from concept stage to delivery and post launch support
- Convey effectively with all task progress, evaluations, suggestions, schedules along with technical and process issues
- Document the development process, architecture, and standard components
- Coordinate with co-developers and keeps project manager well informed of the status of development effort and serves as liaison between development staff and project manager
- Keep abreast of new trends and best practices in web development






