
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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About Company
Espressif Systems (688018) is a public multinational, fabless semiconductor company established in 2008, with headquarters in Shanghai and offices in Greater China, India, and Europe. We have a passionate team of engineers and scientists from all over the world, focused on developing cutting-edge WiFi-and-Bluetooth, low-power IoT solutions. We have created the popular ESP8266 and ESP32 series of chips, modules, and development boards. By leveraging wireless computing, we provide green, versatile, and cost-effective chipsets. We have always been committed to offering IoT solutions that are secure, robust, and power-efficient. By open-sourcing our technology, we aim to enable developers to use Espressif’s technology globally and build smart connected devices. In July 2019, Espressif made its Initial Public Offering on the Sci-Tech Innovation Board (STAR) of the Shanghai Stock Exchange (SSE).
Espressif has a technology center in Pune. The focus is on embedded software engineering and IoT solutions for our growing customers.
About the Role
Espressif’s https://rainmaker.espressif.com/ is a paradigm-shifting IoT cloud platform that provides seamless connectivity to IoT devices to mobile apps, voice assistants, and other services. It is designed with scalability, security, reliability, and operational cost at the center. We are looking for senior cloud engineers who can significantly contribute to this platform by means of architecture, design, and implementation. It’s highly desirable that the candidate has earlier experience of working on large-scale cloud product development and understand the responsibilities and challenges well. Strong hands-on experience in writing code in Go, Java, or Python is a must.
This is an individual contributor role.
Minimum Qualifications
-
BE/B.Tech in Computer Science with 5-10 years of experience.
-
Strong Computer Science Fundamentals.
-
Extensive programming experience in one of these programming languages ( Java, Go, Python) is a must.
-
Good working experience of any of the Cloud Platforms - AWS, Azure, Google Cloud Platform.
-
Certification in any of these cloud platforms will be an added advantage.
-
Good Experience in the development of RESTful APIs, handling the security and
performance aspects.
-
Strong debugging and troubleshooting skills.
-
Experience working with RDBMS or any NoSQL database like DynamoDB, MYSQL, Oracle.
-
Working knowledge about CI/CD tools - Maven/Gradle, Jenkins, experience in a Linux (or Unix) based environment.
Desired Qualifications
-
Exposure to Serverless computing frameworks like AWS Lambda, Google Cloud Functions, Azure Functions
-
Some Exposure to front end development tools - HTML5, CSS, Javascript, React.js/Anular.js
-
Working knowledge on Docker, Jenkins.
Prior experience working in the IoT domain will be an added advantage.
What to expect from our interview process
-
The first step is to email your resume or apply to the relevant open position, along with a sample of something you have worked on such as a public GitHub repo or side project, etc.
-
Next, post shortlisting your profile recruiter will get in touch with you via a mechanism that works for you e.g. via email, phone. This will be a short chat to learn more about your background and interests, to share more about the job and Espressif, and to answer any initial questions you have.
-
Successful candidates will then be invited for 2 to 3 rounds of the technical interviews as per the previous round feedback.
-
Finally, Successful candidates will have interviews with HR. What you offer us
-
Ability to provide technical solutions, support that fosters collaboration and innovation.
Ability to balance a variety of technical needs and priorities according to Espressif’s growing needs.
What we offer
- An open-minded, collaborative culture of enthusiastic technologists.
- Competitive salary
- 100% company paid medical/dental/vision/life coverage
- Frequent training by experienced colleagues and chances to take international trips, attend exhibitions, technical meetups, and seminars.
What kind of work will you get?
We are looking for a java developer.
Examples of technical tasks:
Working on our backend SDK to implement APIs that will be consumed by the frontend widgets
Designing APIs for different auth recipes
Architecting auth flows
You will also be given non technical tasks like product brain storming, competitor analysis and writing documentation.
Note: Compensation is as per the applicant's geography
Requirements
Well versed in java with 2+ years of professional experience
Familiar with and comfortable working with Web frameworks like FastAPI, Django and Flask
Familiar with HTTP networking in java
Strong understanding of async and sync modes in java
Bonus:
Contributed to open source, or have your own open source repo with a community and many github stars
Built an in-house authentication or authorization solution or worked with solutions such as Keycloak, Auth0, Ory, Okta etc
If you like our project, please star us on https://github.com/supertokens/supertokens-core">Github
Note: Compensation is as per the applicant's geography
Recruitment Process
Initial Filtering
Apply
Technical Interview (1/2) - 1.5 hours
Discussion on your past work, this will involve sharing your work (code and output) via screen share
Architecture discussion and general programming related live code problems.
You will be allowed to use Google throughout the interview and you will be required to have screen share on.
This call will be with the CTO
Technical Interview (2/2) - 1.5 hour
This will involve a discussion to assess the breadth and depth of your technical knowledge and general questions on various technical topics.
You will not be asked to write any code
This call will be with the CTO
Chat with the Co-Founder - 1 hour
This call will involve a general discussion to assess culture fit
- Expertise with NodeJS (extensively using ExpressJS) and databases like MongoDB or MySQL
- Comfortable with developing MVC architecture-based code
- Skilled in implementing security features across the applications and components
- Skilled with code optimization techniques
- Strong troubleshooting techniques
- Strong defect resolution process for minimized latency
- Familiarity with confluence management like JIRA/Trello/Youtrack
Good to have:
- Networking fundamentals, prior working experience in network technologies and protocols
- Tools usage - Code quality, Memory/CPU profiling tools
- Ability to build supportability features to reduce the defects in software components
- Knowledge of GNU tools, revision control software (SVN, Git, etc.) and development lifecycle, docker container usage and LDAP is a plus
We are building 25+ years of strong regional business acumen, deep relations, and experienced management to revolutionaries trade through comprehensive digital platform and to fulfill the needs of consumers, retailers, suppliers, distributors and manufacturers through digital brands with a vision to disrupt, build, and own the retail business value chain in each market.
We at the present have our presence in UAE, India, Iraq and Saudi Arabia.
Job Description :
* Advanced web development in PHP (OOP) at least 3 years or more!
* Advanced experience with newest version of Laravel or Symfony framework
* Advanced knowledge with Git, MySQL DB (AWS RDS), Amazon S3 storage service, memory cache (Redis).
* Advanced knowledge with writing REST APIs.
* Good knowledge of SOLID, DRY and KISS coding principle.
* Good experience with Linux, Amazon Web Services and Docker.
* Basic knowledge of Design Patterns in PHP.
* Some work should be done using jQuery, HTML and XML standards.
* You enjoy analyzing all the facts and information.
* In depth knowledge of MySQL database.
Perks of working with us :
- Objectives are set to help you align and contribute to the mission
- Ample opportunities for interacting with customers, product managers and the leadership
- You will self-asses your progress while managers will guide you through continuous feedforward.
- Leverage and build strong connections across communities of interests
- Pick your Mentor to help you navigate the present and drive your future
- Continuous learning and upskilling through Nexversity
- Flexibility to move across functions, skills and technologies
- Hybrid work mode to drive balance
Java, Java8, Springboot, Microservices, core java, j2ee, JAVA, Springboot
backend, core java, java8, micro services
Job Title: Java Developer
Job Type: Permanent/Contractual
Experience: 3+ years
Job Location: Bangalore, Mumbai, Gurgaon
Qualification: B. Tech, BE, MCA or higher
JOB DESCRIPTION:
- Design overall architecture of the web application.
- Work with UI designers, business users and other team members to develop web applications
- Define, develop and develop APIs
- Integrations with partner APIs and, Database Management
- Maintain quality and ensure responsiveness of applications
- Collaborate with the rest of the engineering team to design and launch new features.
- Maintain code integrity and organization
- Work closely with graphic designers.
- Understand and implement security and data protection
- Development experience for both mobile and desktop.
TECHNICAL SKILLS & EXPERIENCE:
- Proficient in JAVA with Spring Boot framework
- Proficient using relational databases such as MySQL
- Experience with cloud message APIs, REST APIs and usage of push notifications.
- Knowledge of code versioning tools such as Git, Mercurial or SVN
- Good understanding of collaboration tools
- Should be comfortable with Agile methodology and using Agile tools
- Good verbal and written communication skills
- Good problem-solving skills.
- 2+ years of experience on Java, Spring Boot, Hibernate in medium to large-scale projects
- Must have experience with at least some flavours of both SQL (MySQL, Postgres) and NoSQL (Kafka, MongoDB, ElasticSearch, NoSQL distributed cache system, DynamoDB etc), datastores in production
- Must have experience with Kafka or similar message queue systems in production
- Stellar problem solving skills
- Hunger to learn new things and ability to grasp new concepts quickly
- Ability to move quickly without breaking things too much (we are dreamers)
- Ability to work under immense pressure which is balanced by a sense of responsibility and ownership
- Should be able to groom juniors and take them to the next level

- Computer Science fundamentals in object-oriented design, design patterns, data structures, algorithm design,
- Proficiency with Java
- 1+ years of experience contributing to architecture and design in a product setup
Key Responsibilities
- Understand customer needs by collaborating with Product Managers and Business stakeholders
- Design, development, delivery, and support of large-scale, distributed software applications and tools
- Use software engineering best practices to ensure a high standard of quality and maintainability for all deliverables
- Work in an agile, startup-like development environment, where you are always working on the most important stuff.
- Take initiatives and come up with new ideas to invent solutions for customers
- Work on building scalable backend platform for customer & seller apps, brands platform, demand generation platform, supply chain & logistics platform, credit platform and several cross platform software components
- Participate in the process to fundamentally change the food and grocery ecosystem in India, and impact billions of people through technology, mobile, and data science
Requirements:
An ideal candidate for this role is someone who has-
- BE/BTech degree in Computer Science from a top engineering school
- 1-5 years of professional software development experience
- Strong problem solving skills and strong command on object oriented design, data structures, algorithms and other computer science fundamentals.
- Strong coding skills - professional experience in developing production-quality software in Java/Python
- Expertise in Web Services, Service-oriented architecture, Databases, NoSQL, Distributed systems, Cloud Technologies.
- Extreme software engineering skills to design and develop low-latency, high availability, internet-scale web services
- Solid understanding of the full software development life cycle and software engineering best practices
- Ability to understand business requirements and translate them into technical requirements
- Demonstrated ability to own software design and development end to end from requirements to launch.
- Ability to collaborate with cross-functional teams to define, design, and ship new features.
- A startup mindset - An athlete who can run at breakneck speed of a startup, yet someone who can bring method to madness through processes suitable for different stages of the company - early stage prototyping and rapid experimentation, before product/market fit, after product/market fit, and scaling.
- Familiarity with Agile development, Scrums, continuous integration, and test driven development processes
- Data driven product development approach - strong focus on data backed engineering decisions.
- Ability to develop products incrementally in fast iterations
- Ability to do collaborative problem solving and design/build chaos resilient systems
- Strong focus on software quality
- Ability to mentor junior developers, and help build an excellent engineering team
- Ability to be a talent magnet - attract great talent to join the core team.






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