
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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Experience: 6+ Years
Location: Chennai & Pune
Work Model: Hybrid
Notice Period: Immediate Joiners Preferred
Role Overview
We are looking for a highly skilled Senior Python Engineer to design, develop, and scale robust backend systems and data-driven applications. The ideal candidate should have strong problem-solving skills, experience with modern Python frameworks, and exposure to cloud and emerging technologies like Generative AI and LLMs.
Key Responsibilities
- Design, develop, and maintain scalable applications using Python
- Build and optimize RESTful APIs using Flask or FastAPI
- Work on data manipulation, processing, and transformation using Python libraries
- Collaborate with cross-functional teams to define and deliver high-quality solutions
- Develop efficient, reusable, and reliable code with strong attention to performance
- Implement containerization and orchestration using Docker and Kubernetes
- Ensure application security, data protection, and compliance best practices
- Manage code versioning using Git and follow CI/CD best practices
- Contribute to cloud-based deployments and infrastructure
- Explore and implement solutions using Generative AI and Large Language Models (LLMs)
Required Skills & Qualifications
- 6+ years of hands-on experience in Python development
- Strong understanding of Python fundamentals and problem-solving skills
- Experience with data manipulation libraries (e.g., Pandas, NumPy)
- Expertise in building REST APIs using Flask or FastAPI
- Solid understanding of ORM frameworks (e.g., SQLAlchemy, Django ORM)
- Experience with cloud platforms (AWS, Azure, or GCP)
- Hands-on experience with Docker and Kubernetes
- Strong knowledge of application security principles
- Proficiency in Git and version control practices
- Exposure to Generative AI concepts and working with LLMs
We are looking for a Technical Lead - GenAI with a strong foundation in Python, Data Analytics, Data Science or Data Engineering, system design, and practical experience in building and deploying Agentic Generative AI systems. The ideal candidate is passionate about solving complex problems using LLMs, understands the architecture of modern AI agent frameworks like LangChain/LangGraph, and can deliver scalable, cloud-native back-end services with a GenAI focus.
Key Responsibilities :
- Design and implement robust, scalable back-end systems for GenAI agent-based platforms.
- Work closely with AI researchers and front-end teams to integrate LLMs and agentic workflows into production services.
- Develop and maintain services using Python (FastAPI/Django/Flask), with best practices in modularity and performance.
- Leverage and extend frameworks like LangChain, LangGraph, and similar to orchestrate tool-augmented AI agents.
- Design and deploy systems in Azure Cloud, including usage of serverless functions, Kubernetes, and scalable data services.
- Build and maintain event-driven / streaming architectures using Kafka, Event Hubs, or other messaging frameworks.
- Implement inter-service communication using gRPC and REST.
- Contribute to architectural discussions, especially around distributed systems, data flow, and fault tolerance.
Required Skills & Qualifications :
- Strong hands-on back-end development experience in Python along with Data Analytics or Data Science.
- Strong track record on platforms like LeetCode or in real-world algorithmic/system problem-solving.
- Deep knowledge of at least one Python web framework (e.g., FastAPI, Flask, Django).
- Solid understanding of LangChain, LangGraph, or equivalent LLM agent orchestration tools.
- 2+ years of hands-on experience in Generative AI systems and LLM-based platforms.
- Proven experience with system architecture, distributed systems, and microservices.
- Strong familiarity with Any Cloud infrastructure and deployment practices.
- Should know about any Data Engineering or Analytics expertise (Preferred) e.g. Azure Data Factory, Snowflake, Databricks, ETL tools Talend, Informatica or Power BI, Tableau, Data modelling, Datawarehouse development.
• As a member of the development team, become deeply familiar with the product goals, and provide thought leadership on the technical aspects of realizing the product goals
• Contribute to the SDLC best practices, modeled after contemporary industry standards, and ensure the practices are diligently followed
• Encourage automation in various aspects of software development such as code reviews, unit tests, continuous integration, system testing. Identify appropriate tools, and create best practices around automation
• Participate in requirement gathering, analysis, designing proofs of concepts
• Team up with various stakeholders in aiding project planning, estimation, execution, and production support
• Identify the most appropriate platforms, frameworks, and third-party components to meet the product requirements
• Define and own the interfaces, such as services and APIs between product components
• Perform code walkthroughs, reviews. Promote code-reuse. Identify opportunities for refactoring code, and ensure code is modular and extensible.
• Ensure adequate coverage of functional and non-functional requirements in test plans
• Provide guidance on production support/bug-fixing issues. Own the technical resolution of high-priority fixes
Technical Skills:
• 0-3 years of hands-on experience with Python and Python-based frameworks such as Django, Flask, and web2py, etc.
• Hands-on experience with web-based front-end technologies is a plus
• Understanding of fundamental design principles for building a scalable web application and integration using RESTful APIs and JSON data
• Deep familiarity with n-tier and MVC patterns
• Strong unit testing and debugging skills
• Familiarity with CI tools such as Jenkins
Who are we looking for?
• Should be comfortable working in a team-oriented, fast-paced, collaborative environment
• Willingness to take on ownership and responsibility
• Resourceful, confident under pressure, ability to communicate with folks with varied experience and backgrounds
• Aptitude for problem-solving and analytical skills
Key Responsibilities:
- Rewrite existing APIs in NodeJS.
- Remodel the APIs into Micro services-based architecture.
- Implement a caching layer wherever possible.
- Optimize the API for high performance and scalability.
- Write unit tests for API Testing.
- Automate the code testing and deployment process.
Skills Required:
- At least 2 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds.
- Excellent hands-on experience using MySQL or any other SQL Database.
- Good knowledge of MongoDB or any other NoSQL Database.
- Good knowledge of Redis, its data types, and their use cases.
- Experience with graph-based databases like GraphQL and Neo4j.
- Experience developing and deploying REST APIs.
- Good knowledge of Unit Testing and available Test Frameworks.
- Good understanding of advanced JS libraries and frameworks.
- Experience with Web sockets, Service Workers, and Web Push Notifications.
- Familiar with NodeJS profiling tools.
- Proficient understanding of code versioning tools such as Git.
- Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms.
- Should be a fast learner and a go-getter — without any fear of trying out new things Preferences.
- Experience building a large scale social or location-based app.
● Be responsible for programming and software development using various programming languages and related tools and frameworks, reviewing code written by other programmers, requirement gathering, bug fixing, testing, documenting and implementation.
● Good understanding of GoLang and microservices
● To take up development and deployment of native code to manage the customer facing platforms
● Explain complex technical issues to project managers, developers, application leads and architects in an easy to understand manner, and recommend clearly thought out solutions.
● Knowledge of Integration Design patterns for building middleware systems from the ground up
● Knowledge of Web Services Interoperability, standards and ability to suggest, criticize and formulate solutions in a multi-vendor and architecture discussions.
● Develop solutions by designing system specifications, standards and programming
● Troubleshoot issues and provide bug fixes
● Knowledge of Security, Logging, Auditing, Policy Management and Performance Monitoring and KPI for end-to-end process execution
● Provide status updates and reporting metrics to the program leadership and contribute towards on-time and on-budget delivery
- Should have experience in supporting the application and infrastructure 24x7.
- Should have good working knowledge on troubleshooting skills of Operating Systems (Linux/Windows)
- Good experience on Java/j2EE application supporting and AWS infra supporting.
- Ability to work with 3rd parties/FOPS and provide required instruction to troubleshoot and restore faults.
- Respond quickly and effectively to production issues, troubleshooting solutions, and taking responsibility for seeing those solutions through resolution.
- Identify root cause and corrective actions for highly complex availability, capacity, security, performance, and quality issues affecting the database.
- Strong knowledge of Linux/Unix operating system.
- Good knowledge in scripting languages like Shell, Python.
- Good Knowledge on Databases like Mongo, Mysql, SQL Server.
- Respond to alerts and take corrective action to ensure the high-availability of our production environments and participate in an after-hours on-call rotation.
- Experience/Knowledge of other cloud platforms (Azure, Google Cloud) is a plus
- Strong verbal and written communications skills are a must
- Must have production support experience as the requirement is 24X7X365 production support.
- Build innovative, state-of-the-art applications and collaborate with the User Experience (UX) team.
- Prepare and maintain all applications utilizing standard development tools
- Develop backend data services and contribute to increasing existing APIs
- Ability to act individually in a complex and fast-paced environment
- Closely work with the Product and QA teams to ensure smooth delivery
- Participate in solution designing with Tech leads and Systems Architects
- Document the development process, architecture, and standard components
- Coordinate with co-developers and keep project manager well informed of the status of development efforts
- Keep abreast of new trends and best practices in web development
- BE/BTech or some equivalent academic stance.
- 2-5 years’ experience
- A confident, self-starter, team player with drive, enthusiasm, and excellent interpersonal, communication, and negotiation skills
- Ability to manage yourself and be a self-starter.
- Great people skills to closely work with other teams.
- Strong in establishing systems & processes
- Expertise in Laravel, MySQL, and Git
- Thorough in Object-oriented concepts
- Knowledge of Restful Web services
- Understanding of web applications
- Working knowledge of one or more caching, queuing systems in desirable
- Familiarity with AngularJs or React is a big plus
- Excellent problem solving
- Can-do attitude
Our client is a decade-old software development company, that offers its clients a wide range of customized web, mobile, and eCommerce tools and software. They are known to use advanced languages and platforms used to build reliable, secure, and scalable solutions for their business clients as well as individual customers. Their disruptive craftsmanship and strategy help in high-performance growth and allows customers to transform digitally and competitively.
Their products are being used by most of the banks and NBFCs in India, apart from clients from other industries. The founder is an IIM and MDI alumni and has experience of more than 13 years in business and strategic roles in MNCs. The company has been accredited by the government as a premier IT company, committed to quality and driven by customer success.
- Understanding and implementing security and data protection
- Managing both front-end and back-end web development requirements from a consumer.
- Taking full responsibility for task/ project execution
- Handling Payment Gateway integration and ecommerce development concepts
- Prioritizing own work and respect deadlines
What you need to have:
- Excellent skills in PHP Laravel
- Strong object-oriented programming skills
- General knowledge of both front-end and back-end web development from a consumer.
- Databases (more than one is desirable) MySQL, PostGRE, MongoDB
- Experience in Payment Gateway integration and ecommerce development concepts
- Should know about child theme and its structure.
- Proficient in CSS3/ HTML5
- Should know about source version control like git or svn etc.
- Familiar with AWS & Linux command line will be added advantage.
- Must be a team player with good communications
- Ability to solve problems quickly and efficiently
- Great aptitude and attitude towards learning
- Ability to prioritize own work and respect deadlines
scalability, accessibility, usability, design, and security in mind. If you don't have all
of these, that's ok, but be excited about learning the few you don't know.
Familiar with building complex web applications using Javascript / AJAX, XHTML,
CSS.
Experience with or knowledge of jQuery, Java, Struts, and other website technologies.
Strong, object-oriented design and coding skills (C/C++ and/or Java preferably on a
UNIX or Linux platform)
Solid software development background including design patterns, data structures,
test driven development
Knowledge of Perl or other scripting languages a plus
Experience with distributed (multi-tiered) systems, algorithms, and relational
databases
Software development experience in building highly scalable applications
Master’s degree in Computer Science, Computer Engineering or related technical
discipline
Experience in eCommerce and Deep hands-on technical expertise
Ability to handle multiple competing priorities in a fast-paced environment
Experience working with service oriented architectures and web based solutions.








