

Oister Global (www.oisterglobal.com) is India’s premier Alternative Assets Manager. We combine robust diligence, deep domain expertise, and an extensive network to create high quality private market opportunities for our investors.
We are seeking a Senior Backend Developer who will be pivotal in architecting and developing scalable, reliable backend systems from scratch. You will work closely with product managers, designers, and other engineers to build new products, design backend architectures, and ensure high performance and responsiveness of the systems. This role requires strong backend fundamentals, cloud experience, a deep understanding of databases, and a passion for system design and architecture.
Key Responsibilities:
● Product Development: Architect, design, develop, test, and deploy new backend products and features from scratch.
● System Design: Take ownership of system design and architecture decisions for new modules, ensuring scalability, reliability, and security. ● API Development: Build efficient and reusable APIs and backend services using Node.js.
● Database Management: Design data models, optimize queries, and manage MongoDB clusters efficiently.
● Cloud Management: Deploy, maintain, and optimize services on AWS, ensuring high availability and performance.
● Best Practices: Maintain coding standards, ensure code reviews, and champion best practices in security, testing, and maintainability.
● Collaboration: Work closely with frontend developers, product managers, QA, and other cross-functional teams to define, design, and ship new features.
● Performance Optimization: Monitor system performance and ensure system uptime and responsiveness.
● Mentorship: Provide guidance and mentorship to junior developers as required.
● Documentation: Maintain thorough documentation of systems, processes, and best practices. Must-Have
Qualifications:
● Education: Bachelor’s degree in computer science, Software Engineering, or a related technical field.
● Experience: 4–5+ years of hands-on backend development experience.
● Expertise in: Node.js (Express.js, Nest.js or similar frameworks) MongoDB (including indexing, replication, sharding concepts) AWS Services (EC2, S3, Lambda, RDS, API Gateway, CloudWatch, IAM, etc.) Proficient in: System design principles Microservices architecture Event-driven architecture Strong understanding of: RESTful APIs.Authentication and authorization best practices (OAuth, JWT) Experience with: CI/CD pipelines Docker and containerization principles Hands-on experience in: Building scalable, distributed, and fault-tolerant systems Good knowledge of : Logging, monitoring, and debugging distributed applications

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About Company: Codezen Tech Solutions is a technical consultancy and development firm that believes in increasing transparency and efficiency using cloud based platforms.
Responsibilities and Duties:
- Writing and maintaining reliable Ruby code.
- Integrating user-facing elements designed by the front-end team.
- Connecting applications with additional web servers.
- Maintaining APIs.
- The ideal candidate will be fluent in Ruby and proficient with Ruby on Rails
- Extensive experience developing web applications in Object-Oriented Perl, Python, or Java can be substituted as long as there is a strong desire to work in Ruby
- Design, build, and maintain efficient, reusable, and reliable Ruby code
- Architecting, designing and developing scalable backend systems with RoR
- Solid understanding of deploying and maintaining Rails apps within the AWS environment.
- Set up workers and deploy across multiple instances.
- Work on complex modules and be hands on on the product code as and when required
Required Experience, Skills and Qualifications:
- 2-4 years of experience required
- Experience with Ruby on Rails, along with other common libraries such as RSpec and Resque
- Good understanding of the syntax of Ruby and its nuances
- Solid understanding of object-oriented programming
- Good understanding of server-side templating languages (such as Liquid, Slim, etc depending on your technology stack)
- Good understanding of server-side CSS preprocessors (such as Sass, based on project requirements)
- A knack for writing clean, readable Ruby code
- Proficient understanding of code versioning tools (e.g. Git, Mercurial or SVN)
- Familiarity with development aiding tools {such as Bower, Bundler, Rake, etc.}
- Familiarity with continuous integration
- Familiarity with testing tools.
- Ability to quickly adapt & independently work in a fast-paced Agile environment with minimum supervision.
About Vijay Sales
Vijay Sales is a leading eCommerce and retail brand delivering exceptional experiences to customers across India. Leveraging technology to enhance shopping experiences, we are on a mission to create seamless omnichannel platforms and innovative solutions for our customers. Join our dynamic team to shape the future of retail technology.
Role Overview
As a Lead Backend Engineer, you will drive the development and optimization of robust backend systems for our products built on the MERN (MongoDB, Express.js, React, Node.js) stack. You'll lead a talented team of developers, design scalable architectures, and ensure the seamless integration of backend functionalities with our frontend systems.
Key Responsibilities
- Lead the design, development, and deployment of backend systems for Vijay Sales' products.
- Architect scalable, secure, and high-performance APIs and microservices.
- Mentor and guide a team of backend developers, ensuring best practices in coding, architecture, and DevOps.
- Collaborate with cross-functional teams, including frontend engineers, DevOps, and product managers, to deliver end-to-end solutions.
- Optimize database structures and queries for performance and scalability.
- Implement and oversee CI/CD pipelines to streamline deployment processes.
- Troubleshoot and resolve performance bottlenecks, security issues, and other technical challenges.
- Stay updated on industry trends, tools, and technologies to continuously improve our stack.
Skills and Qualifications
Must-Have:
- Proven experience as a backend engineer with expertise in the MERN stack (Node.js, Express.js, MongoDB).
- Strong understanding of RESTful APIs and GraphQL.
- Proficiency in database design, indexing, and optimization (MongoDB is preferred).
- Hands-on experience with containerization tools like Docker and orchestration platforms like Kubernetes.
- Strong knowledge of authentication/authorization frameworks (JWT, OAuth2).
- Experience with cloud platforms like AWS, GCP, or Azure.
- Proficiency in DevOps practices, including CI/CD pipelines and version control systems (Git).
- Excellent problem-solving skills and a proactive attitude toward innovation.
Nice-to-Have:
- Experience in building scalable eCommerce platforms or omni-channel systems.
- Knowledge of front-end technologies (React.js) for seamless backend integration.
- Familiarity with message brokers.
- Serverless and Micro Architectures
- Exposure to AI/ML-driven applications for personalization and recommendation engines.
Will be responsible for Backend and infrastructure for mobile app and website.
We are looking to recruit a candidate for a role that will require:
● Talented Leader who will be responsible for Leading a group of talented technical individuals to build
scalable, and secure products
● Leads our Back-End and infrastructure
● Drives architecture and the design of enterprise mobile/web/API solutions at scale
● Work with Product, Testing and Infrastructure teams to understand product vision and requirements
● Oversee the development and execution of development plans and report on execution
● Work with Product and testing teams to understand product vision and requirements
● Has deep exposure to all aspects of engineering, modern web, desktop & mobile application architectures,
data modelling, high level design, low level design, non-functional technical requirements and visual design
Requirement
● 5+ years of experience in hard core development in predominantly product development companies
● Strong troubleshooting, debugging and problem-solving skills
● Proven track record of building scalable and reliable services on Cloud
● Architecture & Design
● Solid experience of designing end-to-end architecture and design of applications using one or more
platforms for large-scale high-throughput solutions
● Design and implement technical governance process as appropriate across the application development
lifecycle
● coding guidelines, quality standards, best practices, code acceptance criteria, automation
● Experience in collaborating with the team in reviewing application architecture. - Node.js, Web Services
REST, MySQL/MongoDB/NoSQL
Education: Engineering/MBA
Work experience: 5 years relevant experience
Compensation: Based on Industry Standards
Java Developers (4-5 positions)
What qualities are we looking for?
- 3 – 8 years of experience in building web applications
- Excellent command over Data Structures & Algorithms
- Exceptional coding skills in an Object-Oriented programming language (Java)
- Strong problem solving and analytical skills
Technical Requirements:
- Working experience on JAVA, Spring Boot. (building web services)
- Working experience in building microservices and distributed systems.
- Working experience on using messaging queues RabbitMQ/Kafka is a plus.
- Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery, Angular 5+)
- Excellent knowledge and programming skills in data structures, algorithms.
- Familiarity with databases (e.g. MySQL, MongoDB)
- Proficiency with Git

● Experience in design, development, and deployment of the
application.
● Knowledge of Restful Web-Services, JSON, HTTP, Networking
protocols
● Knowledge of MVC architecture.
● Mandatory Tech Skills: PHP, NodeJS, JavaScript, SQL, NoSQL,
GIT.
● Good to Have: Laravel, Express, AWS
● Basic understanding of HTML, CSS
Strong proficiency with one of the Vue.js, Angular JS, React JS JavaScript Techologies
2. Knowledge of Node.js and frameworks available for it , such as Express JS, Strong Loop, etc
3. Understanding the nature of asynchronous programming and Promises and its quirks and workarounds
4. Good understanding of server-side templating languages (such as Jade, EJS, etc depending on your technology stack)
5. Good understanding of server-side CSS pre-processors such as Styles, Less
6. Basic understanding of front-end technologies, such as HTML5, CSS3, and Bootstrap
7. Understanding accessibility and security compliance
8. User authentication and authorization between multiple systems(Internal or Third party), servers, and environments
9. Integration of multiple data sources and databases into one system
10. Understanding fundamental design principles behind a scalable application
11. Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform
12. Implementing automated testing platforms and unit tests
13. Proficient in code versioning tools, such as Git or TFS

Our client is an expert in education financing and counselling related to higher studies abroad. They help students to understand about scholarships in various colleges abroad, whether they are eligible and how to apply for such esteemed institutions. Their dedicated page enlists every scholarship available across the globe, apart from other facilities required by students like visa counselling, forex, accommodation, Peer contacts etc.
They also offer the best resources for exams like IELTS, TOEFL and GRE apart from organising webinars and events to connect with industry experts, alumni and fellow students - which helps to prepare for travels, loans and more. Partnered with the most prominent Banking and non-banking financiers, the team is led by FinTech-experienced IIT Kanpur alumni, passionate about offering sustainable financial offerings.
- Improving customer experience, not only for borrowers but also other partners on the platform
- Ensuring seamless integration with data/ service providers and lending partners
- When not doing any of the above, writing tests to prevent any regressions
What you need to have:
- Must have skills:
- Good Experience in Ruby On Rails
- Experience in Modular Javascript programming
- Self-starter: Someone who can develop independently
- Passionate about problem-solving, ability to see the big picture
- Realizes the value of 80-20
- Good to have skills:
- DevOps experience (Managing web application on AWS)
- Prior experience in the Fintech or Banking industry as a tech role.
- Test case writing
Software Developer: 1 to 4 yrs
Sr. Software Developer: 4 to 8 yrs



