
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: Java Developers
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 Java/Spring/Spring Boot/Hibernate/Java
● Experience in developing highly scalable and reliable web applications, including
integration with internal and external systems.
● Experience building web services in REST with technologies like Spring Boot, Spring-
WS, spring MVC or JAX-RS
● Should be able to write test cases (unit and functional) to cover most of the code
● 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
● Knowledge on Redis, ELK stack or Temporal BPM is a big plus
● 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 Start-up
● Location: HSR Layout, Bangalore

About Card91
About
Connect with the team
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Role Overview
Software Architect – Healthcare Interoperability is responsible for leading the design and development of a nextgeneration healthcare interface engine. This role involves integrating with various EHR systems such as Epic, Cerner, Athena, and Meditech, managing diverse data formats including HL7 v2, FHIR R4, X12/EDI, JSON, and XML, while ensuring the platform is scalable, compliant, and observable.
Responsibilities
- Design the architecture for a custom interface engine supporting HL7 v2, FHIR (R4), and X12 EDI etc transactions.
- Define routing, transformation, and queuing strategies for high-volume healthcare data exchange.
- Integration with EHRs (Epic, Athena, Cerner, Meditech) and clearinghouses.
- Establish error handling, retries, monitoring, and resilience patterns (Resilience4j, circuit breakers, observability).
- Mentor developers, review designs/code, and enforce best practices.
Technical Skills Required
- Java / Spring Boot (microservices, APIs, event-driven patterns)
- Integration frameworks: Apache Camel or Spring Integration
- Data mapping: Smooks, HAPI FHIR
- Message formats: HL7 v2, FHIR (STU3/R4), X12 EDI (837, 835, 270/271), JSON, XML, CSV etc
Architecture & Infrastructure:
- Cloud-native design (Azure / AWS)
- Kafka / RabbitMQ for messaging
- Observability: Grafana / Prometheus / ELK
- Security: OAuth2, JWT, mutual TLS, encryption at rest/in-transit
Domain Knowledge:
- Healthcare RCM (pre-billing edits, eligibility, claims, remittance)
- EHR APIs ( Epic App Orchard, Athena One, Cerner Ignite etc)
Experience
- 10+ years in software engineering with 3+ years in healthcare interoperability.

Our ideal candidate for this role is an entrepreneurial and creative out-of-the-box thinking tech geek with a get-things-done attitude, who wants to thrive in a fast-paced international environment.
Desired Candidate Profile :
• Expertise in PHP and Laravel or CodeIgnitor, MySQL or PostgreSQL, Nginx, LEMP setup
• Developing REST APIs & integrating 3rd party APIs (oAuth 2.0), Git
• Hands-on experience in application deployment on linux servers
• You can easily navigate volatile environment where you are constantly getting challenged to push your own boundaries to make sense of ambiguous and complex signals of uncertainty into simple winning outcomes.
• What separates you from other developers is your relentless drive for running new tests and experiments on a regular basis.
• You love programming, but even more, you actually love implementing changes based on user data and create highly scalable technology based solutions.
If you are qualify and are excited about joining us, read about our functional asks below:
• Participate in the entire product development lifecycle, focusing on coding and debugging.
• Translate high level business problems into scalable solutions. These include building self learning modules for dynamic pricing, contextual recommendations, in-house analytics, advanced real-time backend systems, etc.
• Develop Web APIs and end-to-end web services to support various internal & external.
• Develop unit test plans to deliver quality components. • Building reusable code and libraries for future use.
• Optimization of the software platform for maximum speed and scalability.
• Collaborating with the front-end developers and other team members to establish objectives and design more functional, cohesive codes to enhance the user experience.
• Developing ideas for new programs, products, or features by monitoring industry developments and trends.
• Perform UI tests to optimize performance.
• Provide training and support to internal teams.
• Follow emerging technologies.


Must know MySQL & PostgreSQL
- Good Knowledge of HTML, PHP Frameworks (like CI, Laravel, YII), Core PHP, JavaScript and CSS coding.
- Knowledge of Bitbucket/GitHub.
- Strong hands-on Bootstrap.
- Knowledge of databases and database concepts.
- Strong knowledge of Laravel/ CodeIgniter and its extensive feature set.
- Working Knowledge of e-commerce frameworks like OpenCart, WordPress, cs-cart, and Magento.
- Working knowledge of API for Mobile Applications
- Experience in Cache, and search plugins in terms of optimization
- Developing plug-ins/add-ons in PHP for various CMS solutions.
- More than 5 years of experience in Java programming
- Frameworks like Spring(Boot, Core, MVC)or Hibernate
- Good knowledge in design and architectural patterns, with an understanding of Web Services, micro service architectures and REST Based APIs.
- Good knowledge in Agile, JIRA and ALM
- Cloud environments (AWS,Azure…)
- Good Database knowledge (Oracle/ MySQL)
- Previous exposure to banking or financial is preferable
- Desire to get into the development of a top core-banking platform; you will receive specific training on Temenos T24 according to your career plan.
Overview Atom Technologies began its operations in 2005, with the sole aim of providing secured and seamless digital payment solutions to all. Throughout the years, Atom has been successfully developing innovative and award-winning digital payment solutions, catering to the needs of Small and Medium Merchants alike. This encompasses services like POS, Payment Gateway, IVR and Mobile Application. Roles and Responsibilities · Displaying sound knowledge of software engineering process you will work on Payment domain projects · You will participate in AGILE teams. · You must have Hands on experience of OOAD and Design Patterns · You should have ability to work as an individual contributor. · You will need to use capability of customer focus and collaboration skills · Using good analytical, debugging and tracing skills, you should be well-versed with clean code principles (SOLID, DRY, KISS) and exposure to secure coding is beneficial.
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- Bachelor’s degree in computer science, engineering, or a related field.
- At-least more than 1+ Years of Experience in a similar role would be desired.
- Excellent technical, diagnostic, and troubleshooting skills.
- Strong leadership skills to drive good coding and design practices across multiple engineering teams
- Willingness to build professional relationships with staff and clients.
- Excellent communication, motivational, and interpersonal skills.
- Expertise in architecting, building, and maintaining ultra-low latency, cost-efficient systems in cloud environments
- Excellent track record in modernizing cloud-based applications using micro services, containers, and other architectures
- Experience and working knowledge in building large-scale, data-intensive Text search applications using Solr / Elastic Search is a Must
- Experience and working knowledge of AI/ML/ML Ops with respect to building large-scale, data-intensive applications would be a Plus
- Experience and working knowledge in building Java based Spring Boot micro-services integrated with any messaging framework
- Driven, Highly-motivated and passionate towards development & innovation
- Determining project requirements and developing work schedules for the team.
- Delegating tasks and achieving daily, weekly, and monthly goals.
- Liaising with team members, management, and clients to ensure projects are completed to standard.
- Identifying risks and forming contingency plans as soon as possible.
- Analyzing existing operations and scheduling training sessions and meetings to discuss improvements.
- Keeping up-to-date with industry trends and developments.
- Updating work schedules and performing troubleshooting as required.
- Motivating staff and creating a space where they can ask questions and voice their concerns.
- Being transparent with the team about challenges, failures, and successes.
- Writing progress reports and delivering presentations to the relevant stakeholders.
- Extremely hands-on in delivering Development and R&D tasks
- Design, plan and perform dev-analysis to determine effort estimates on every sprint for the team
- Running Demo's, ensuring thorough documentation of the features built
- Identify & Plan upgrades to technologies & frameworks from time-to-time

- Hands on Java experience with minimum 8 yrs. More experience is a plus but need to be hands on.
- Server side programming experience with technologies: Spring, Hibernate & Swing is a plus
- Good DB knowledge, hands on PL/SQL or T-SQL
- Experienced to work on Linux, git, IntelliJ, Eclipse
- Experience of designing and developing end-to-end solutions.

Responsibilities:
- Crawl the internet/intranet for issues people are facing and convert them in to stuctured data that would be consumed downstream.
- Familiar with the software development life cycle (SDLC) from analysis to deployment.
- Comply with coding standards and technical design.
- Adapts structured coding styles for easy review, testing, and maintainability of the code.
- Integrate the developed functionality and/or component into a fully functional system.
- Ensure unit and integration level verification plans are in place and adheres to the great quality of code at all times.
- Actively participate in troubleshooting, debugging and updating current live system.
- Verify user feedback in making the system more stable and easy.
- Work closely with analysts, designers, and other peer developers.
Requirements:
- Bachelor's degree in computer science or equivalent practical experience.
- Understanding of OOPS concepts, Persistence, Threading.
- Good understanding of version control system (GIT).
- Knowledgeable in data structures and algorithms.
- A background in Engineering with sound oral and written communication skills.
- 6+ years of experience working on the server-side.
- Exposure to API designing, scalable architecture, and thorough understanding of systems.
- Great database modeling skills.
- Working knowledge of Databases, both relational (such as PostgreSQL) and in-memory database (such as Redis).
- Good understanding of web stack and how all the pieces fit together.
- Experience with open-source projects.
- Experience in designing interactive applications.


ABOUT THE JOB
We are looking for a Senior Software Engineer to join our team. We believe in giving engineers responsibility, not tasks. Our goal is to motivate and challenge people to do their best work. To do that, we have a very fluid structure and give people flexibility to work on projects that they enjoy the most. This develops more capable engineers, and keeps everyone engaged and happy.
Responsibilities
- Design, develop, test, deploy, maintain and improve the software.
- Manage individual projects priorities, deadlines and deliverables with your technical expertise.
- Identify and solve for bottlenecks within our software stack.
ABOUT YOU
Rubrik Software Engineers are self-starters, driven, and can manage themselves. Bottom line, if you have a limitless drive and like to win, we want to talk to you - come make history!
- Bachelor’s or Master’s degree or equivalent in computer science or related field
- 8+ years of relevant work experience,
- Proficiency in one or more general purpose programming languages like Java, C/C++, Scala, Python
- Experience with Google Cloud Platform/AWS/Azure or other public cloud technologies is a plus
- Experience working with two or more from the following: Unix/Linux environments, Windows environments, distributed systems, networking, developing large software systems, file systems, storage systems, hypervisors, databases and/or security software development.
ABOUT THE TEAM
Galactus team owns the end to end development of Rubrik’s data management suite for commercial public clouds - AWS, Azure and GCP. Our objective is to bring the simplicity of Rubrik’s on-prem data protection and management offerings to our customers in the cloud through a solution designed from ground up to be highly scalable, available & secure and yet optimized to minimize our customer’s cloud costs. We achieve this by taking a cloud-first approach to design - leveraging technologies built for the scale, elasticity and automation needs of the cloud; and deploying on our brand new SaaS platform called Polaris.
Recently we have :-
- Built policy based backup and recovery for Virtual Machines in AWS, Azure and GCP and managed databases in AWS.
- Built features like granular file recovery leveraging managed Kubernetes Service in AWS for elastic compute
ABOUT RUBRIK
Rubrik is one of the fastest-growing companies in Silicon Valley, revolutionising data protection, and management in the emerging multi-cloud world. We are the leader in cloud data management, delivering a single platform to manage and protect data in the cloud, at the edge, and on-premises. Enterprises choose Rubrik to simplify backup and recovery, accelerate cloud adoption, enable automation at scale, and secure against cyberthreats. We’ve been recognized as a Forbes Cloud 100 Company two years in a row and as a LinkedIn Top 10 startup.
Rubrik provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics. In addition to federal law requirements, Rubrik complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

