
About YABX
About
Yabx is a global FinTech venture aimed at simplifying financial access to the 2 Bn+ under-banked people in the emerging markets of Africa, Asia, and Latin America. Our products handle transactions at massive scale. We're looking for tech leads that will help us build world class products. We need our tech leaders to be passionate, versatile, display leadership qualities and be enthusiastic to take on new problems across the full-stack as we continue to push technology forward. As a key member of a small and versatile team, you design, test, deploy and maintain software solutions. You will also get an opportunity to interact with Professors and research scholars at leading academic institutions.
At Yabx, you will be working across a multi-culture, multi-country team and collaborating with business teams, financial analysts, Data Scientists, Hardware teams etc. The founding team consists of people from IITs, IIMs and top engineering colleges.
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About the Role:
We are seeking a highly skilled and passionate Full Stack MERN Developer to join our growing development team. The ideal candidate will be proficient in JavaScript and have experience working with both MongoDB and PostgreSQL databases. As a Full Stack Developer, you will be responsible for designing, developing, and maintaining scalable and performant web applications across our product verticals.
Responsibilities:
- Collaborate with product managers, designers, and other developers to design and develop full-stack web solutions.
- Build responsive, user-friendly interfaces using React.js.
- Develop robust and scalable backend services using Node.js and Express.js.
- Design, implement, and manage databases using MongoDB and PostgreSQL.
- Develop and integrate RESTful APIs and third-party services.
- Ensure cross-platform optimization for mobile responsiveness.
- Write clean, maintainable, and well-documented code.
- Conduct code reviews, unit testing, and performance tuning.
- Troubleshoot, debug, and upgrade existing applications.
- Ensure security and data protection best practices.
Requirements:
- 1-5 years of experience as a Full Stack Developer (preferably MERN stack).
- Proficient in JavaScript, both frontend and backend.
- Strong experience with React.js, Node.js, and Express.js.
- Working knowledge of MongoDB and PostgreSQL.
- Familiarity with version control systems (e.g., Git).
- Understanding of server-side architecture and RESTful APIs.
- Familiarity with cloud platforms (e.g., AWS, or GCP) is an advantage.
- Good understanding of security and performance optimization.
Who You Are:
- You’ve built scalable, production-ready APIs in fast-paced environments, and are comfortable with the challenges that come with a growing startup.
- You understand event-driven architectures and have hands-on experience building real-time applications.
- You are fully capable of taking ownership of backend systems, from designing the database schema to writing efficient, maintainable code.
- You think beyond the code: optimizing performance, scalability, and security are as important as building new features.
- You’re comfortable troubleshooting complex issues, whether that’s API bottlenecks, database performance, or production issues.
Responsibilities:
- Design, implement, and manage a NestJS backend with a modular, scalable architecture that can easily handle real-time events and communication.
- Develop and maintain WebSocket services for real-time event-driven updates and ensure seamless communication across the system.
- Integrate RabbitMQ for reliable internal messaging, handling queues and ensuring event-driven workflows are efficient and fault-tolerant.
- Implement database management strategies using MongoDB, Redis, and Elasticsearch, ensuring efficient data handling, indexing, and optimization.
- Integrate with external APIs (JSON-RPC, XML-RPC, REST) to enhance system capabilities.
- Ensure high performance of the system by optimizing database queries, implementing caching strategies using Redis, and ensuring optimal indexing and data flow.
- Implement role-based authentication and authorization mechanisms using JWT, OAuth, and RBAC patterns within NestJS.
- Follow security best practices to ensure sensitive data is protected, credentials are stored securely, and the system is resilient to common vulnerabilities.
- Work collaboratively with cross-functional teams to ensure seamless integration between different services and technologies.
Must-Have Skills:
- Strong proficiency in Node.js and NestJS with TypeScript.
- Solid experience with MongoDB, Redis, and Elasticsearch for data storage and real-time data handling.
- In-depth knowledge of WebSockets and Socket.IO in NestJS Gateways, enabling real-time communication and updates.
- Experience with RabbitMQ for message queuing and asynchronous task handling.
- Strong understanding of authentication & authorization systems using JWT, OAuth, and RBAC (Role-Based Access Control).
- Expertise in optimizing APIs, including techniques for caching, improving database performance, and reducing latency.
- Familiar with API security best practices, including secure storage of credentials, encryption, and safeguarding sensitive data.
Key Skills:
- TypeScript, NestJS, WebSockets, Socket.io
- Redis, MongoDB, Elasticsearch, RabbitMQ
- API Optimization, JWT, OAuth, RBAC
- Real-time communication, Event-driven architecture
At Primathon, we strive to deliver world-class software for our clients and empower our engineers to become full-stack in technology and provide them 360° experience. We are looking for champions in backend development with experience in NodeJs/Python. You would be working on NodeJs, Python, PostgreSQL, MongoDB, Redis Elastic search, RabbitMq, SQS, Docker, AWS.
Responsibilities and Duties
● Participate in agile software development, prototyping and code reviews
● As a backend engineer, you will work on backend services in Node JS, MongoDB, PostgreSQL, Redis.
● Design, implement and/or use RESTful web services
● Designing database schema
● Writing automation test cases
● Write testable, well-thought-out code within the ecosystem, embracing additional languages and frameworks when appropriate
Required Experience, Skills and Qualifications
● 1+ years of experience as a Backend developer.
● Experience designing, implementing and using RESTful Web Services with Service-Oriented Architecture.
● Knowledge & basic understanding of JavaScript frameworks like React, D3, etc and strong experience working with MVC.
● Solid understanding of version control principles, preferably using Git
● Experience using mocking frameworks, testing frameworks, dependency injection, NoSQL and/or relational databases
● Strong knowledge on how to navigate the vast and quickly evolving collection of open source projects and select the right tool for the job
● Attention to detail and the ability to build reliable, scalable, and flexible software.
Work Experience ** Minimum 2+Years
Company is a remote-first team, looking to scale our Open Source Feature
Flagging, Remote Config and A/B Testing product. With both SaaS and on-premises customers, we are investing into our globally distributed, low latency API and making it simple for customers to deploy on their own infrastructure via Kubernetes and OpenShift.
We are looking for a Lead Server-Side Engineer, who also enjoys working on dev-ops, infrastructure and orchestration, and can help build out our existing API and infrastructure.
We are a really small team right now, and this is our first technical hire outside of the founders, so it’s a great opportunity to be part of something that is looking to scale quickly!
We are looking for someone who loves working with:
- Python. Django Rest Framework experience would be great, but not essential! We prioritise
- quality over quantity.
- Postgres with InfluxDB, Oracle, MySQL and Redis experience a plus.
- Docker, Kubernetes, Helm, OpenShift and associated tooling.
- AWS, especially ECS, Lambda, RDS and DynamoDB. Performance and uptime are super
- important to us.
- The challenge of scaling a global, distributed API to 10,000+ requests per second.
- We have SDKs in a bunch of languages, so the more polyglot you are the better.
- If you like writing JS and React that would be awesome too.
We are a 100% remote team, currently based on the West Coast US and in Europe
Skills:
Strong knowledge of MYSQL/PostGreSQL; Knowledge of MongoDB, Redis, Couch DB is preferred.
Expertise in application development, databases, version control, and deployment. Skill - Node.js,
Experience of AWS or GCP - especially services such as Lambda or google app engine
Solid grasp of Service-oriented architecture. Web Services implementation on a medium to large scale
Solid understanding of scaling mobile app services. Having worked the backend of an Android app is preferred
Culture:
Ability to work independently with minimal supervision
Happy to deal with, and contribute to, an environment of daily builds Has worked in small teams, is versatile. Work within short timelines and be receptive to business needs. Can work closely with Digital, Product, Operations teams.
Desirable Social Attributes:
Has contributed to one or more Open Source projects through own initiative. Has provided a high quality answer to a question posted on StackOverflow.
Role:
As a Software Developer who would work independently, the candidate is expected actively acquire problems and deliver solutions as well as guide the team technically. Such a problem solver would obviously be a self starter with a high level of curiosity rather than a programming language specialist.
He/she would be required to produce software of the highest quality through self-discipline, clear and engaged communication, and attention to detail. The role would include custom web application development on (most typically on Node.js and PHP/Python), databases (most typically MySql and MongoDb), version control (github), testing (necessarily through test scripts written before code is written), daily builds and eventual deployment onto AWS or GCP.
Attributes of the ideal candidate:
Highly productive software developer with the proven aptitude to understand and apply technology
Determination to succeed despite obstacles and challenges, and a positive attitude favoring achievement of goals over open-ended investigation
Always learning, evolving, and sharing what you know
Inspired by complex, varied problems and rapid change
Open-minded, flexible, and curious about new and better ideas
Building highly-scalable and secure payments platform
Primary owners of one or more components of the platform and will drive innovation in
your area of ownership
Working with various product teams gathering requirements and adding capabilities
Working with some of the smartest people in the industry and will have ample opportunity to learn and grow
Using cutting-edge cryptography to secure payments beyond industry standards
Deriving actionable insights by mining TBs of data
Building a low-level infrastructure that aims to push the boundaries of network
performance
Participating actively in recruitment and nurturing of engineers as awesome as you
What do we look for?
Review and influence new evolving design, architecture, standards and methods with
stability, maintainability, and scale in mind
Identify patterns and provide solutions to class of problems
Research, evaluate and socialize new tools, technologies, and techniques to improve the value of the system
Be able to multitask, prioritize and handle dependencies with minimal oversight
From a technology perspective, you should have the knowledge and/or experience in a
reasonably sized subset of the following ( the more, the merrier!! )
Worked on one or more large scale java applications
Good understanding of nuances of distributed systems, scalability, and availability
Good knowledge of one or more relational and NoSQL databases and transactions
Shrewd focus on latency and throughput of services
In-depth understanding of concurrency, synchronization, NIO, memory allocation and GC
Experience with IaaS clouds like AWS/Google Cloud, Azure, OpenStack etc..
Experience in working with Message Brokers and Application Containers
Great ability to mentor and train other team members

We’re looking for a Ruby on Rails Software Engineer/Shopify App Developer who has experience working with the Shopify platform and is able to work on a Shopify app.
Your Daily Challenges
When we welcome you aboard we’ll introduce you to your Team, which consists of a front-end developer, a Shopify App Marketer who grew 2 apps to million dollar annual revenue, and a product manager.
These are the people you’ll work closely with on Product development day-to-day. Once you get settled in and learn more about the team, your day to day activities will look something like this:
- Own the end-to-end development cycle for the Shopify app you’ll be working on.
- Coordinate with fellow developers to get things done on time.
- Implement high quality code in an agile, test driven development environment
- Review exception reports to identify and fix bugs
- Development of new apps and features
- Maintenance of existing features
- Collaboration with cross-functional teams
- Contributions of ideas to improve the product
Your Experience
- 3-5 years of experience with Ruby on Rails
- Experience with Shopify app development
- Familiar with Sidekiq, PostgreSQL
- Good understanding of HTML and CSS (positioning and styling)
- Excellent communication skills
- Takes pride in writing clean, organized, efficient code
- An eye for detail
- Experience with vanilla JavaScript and React a plus
- Experience working in an entrepreneurial/startup environment
Your Compensation
- The compensation range for this role is INR 14-18 LPA (~25K USD) + up to 5% equity.
- The compensation varies with experience and qualifications.
- This is a full-time remote/work from home position.
Thanks for the time you took to read about this opportunity.
Role and Responsibilities:
- As a backend developer, your primary focus will be the development of all server-side systems
- A basic understanding of front-end technologies is necessary as well. You will test, secure and deploy your code
- Work experience on Node.js is a must along with a server-side framework like Express.js
- Strong proficiency in JavaScript
- Writing reusable, testable, and efficient code
- Experience and proficiency integrating with REST APIs
- Understanding of scalable computing systems, software architecture, data structures, and algorithms
- Experience in working with databases such as MongoDB, Redis, Elasticsearch, etc.
- AgileScrum development cycle understanding.
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.
- Good knowledge of MongoDB(Must) & any other MySQL Database.
- Good knowledge of Redis, its data types, and their use cases.
- Experience developing and deploying REST APIs.
- Knowledge and working experience in Cloud environment - AWS or Azure
- Good knowledge of Unit Testing and available Test Frameworks.
- Should be a fast learner and a go-getter without any fear of trying out new things









