Backend Developer

Job Title: Senior Java Developer – Multi-SaaS / Microservices / Pub-Sub

About the Role

We are seeking a highly skilled Senior Java Developer with strong leadership abilities to join our team. The ideal candidate will have deep expertise in Java, micro services architecture, multi-tenant SaaS systems, pub/sub messaging, and cloud-based deployments on AWS EKS. This role requires not only technical mastery but also the ability to mentor teams, influence architecture decisions, and ensure best practices through Test-Driven Development (TDD).

Key Responsibilities

• Lead design and development of Java-based multi-tenant SaaS applications using microservices architecture.
• Implement pub/sub messaging systems for event-driven communication.
• Deploy, monitor, and optimize services on AWS EKS.
• Ensure system reliability, scalability, and security using AWS CloudWatch and other observability tools.
• Apply TDD principles to drive high-quality, maintainable code.
• Collaborate with product managers, architects, and other developers to translate requirements into technical solutions.
• Lead code reviews, mentor junior engineers, and promote engineering best practices.
• Take ownership of end-to-end delivery, from architecture design to production rollout.

Required Skills & Qualifications

• Proficiency in Java with 6+ years of professional development experience.
• Strong background in microservices architecture and multi-tenant SaaS systems.
• Expertise in pub/sub messaging patterns (e.g., Kafka, RabbitMQ, or AWS SNS/SQS).
• Hands-on experience with AWS EKS and container orchestration (Kubernetes).
• Strong understanding of monitoring and logging using AWS CloudWatch or similar tools.
• Proven experience applying Test-Driven Development (TDD) in real-world projects.
• Demonstrated leadership skills – mentoring, decision-making, and driving engineering excellence.
• Solid understanding of software engineering best practices, CI/CD, and version control (Git).

1. Develop, maintain, and enhance robust backend systems using Python3 and frameworks like Django (mandatory), Flask, and FastAPI (good to have).
2. Design, implement, and maintain highly efficient and automated continuous integration and continuous deployment (CI/CD) processes using Jenkins and configuration management with Ansible.
3. Elevate our testing culture by architecting and implementing innovative testing strategies, focusing on both unit and integration testing to ensure exceptional code quality and extensive coverage.
4. Follow peer-to-peer code reviews and cross-team collaboration to build scalable and reliable solutions.
5. Proficiently work with at least one cloud technology, preferably AWS, to deploy and manage applications in the cloud environment.
6. Possess knowledge of Nginx, load balancing, and scalability to optimize system performance and reliability.
7. Good experience working in distributed micro-service architecture and driving them with crucial requirements like request tracing, debugging critical issues, logging, monitoring, and alerting. 
8. Work in containerized environments using Docker and Docker Compose, and have experience with AWS ECS for container orchestration.
9. Prioritize maintainability and reliability in developing and maintaining software systems, pushing the boundaries of what's possible in our product ecosystem.
10. Collaborate effectively within a team, taking initiatives and driving projects forward with minimal micro-management.
11. Pave the way for maintainable and reliable codebases by introducing novel approaches and best practices in software development.

Requirements

1. Bachelor’s/Master’s degree in computer science.
2. Strong teamwork and communication skills, with a proactive approach to project management and task ownership.
3. Proven track record as an innovative Python developer with a focus on product engineering.
4. Visionary mindset to work in an agile environment, participating in sprint planning, stand-ups, and retrospectives.

Benefits

100% Remote

Insurance

3+ years of experience developing Backends using NodeJS. Should be well versed with its asynchronous nature, event loop, promises, and callbacks.

Node expressProficient in Node.js and working knowledge of JavaScript, JQuery, AJAX, HTML, CSS, and frameworks ( React.js)

Experience in Node JS MVC framework and Rest API frameworks like Express.

Experience developing desktops.

Experience in Mongo DB.

Familiarity with using AWS components.

Postman for documenting/testing APIs.

Rejolut is among the fastest-growing and award winning Tech companies working on leading technologies namely Blockchain, Machine Learning & Artificial Intelligence, Complex mobile & Web Apps, IoT, etc.Rejolut is a venture-backed company with clients in over several countries namely Malaysia Airlines,gba global,my-earth,biomes, Dlg-hub,etc.

We are looking for Tech geeks having hands-on experience and in love with building scalable, distributed and large web/mobile products and tech solutions. He/She must be an excellent problem solver with passion to self-learn and implement web technologies (frontend + backend). He/She would be responsible for the architecture design, code review, and technology build and deployment activities of the product. 

Responsibilities:-

- Own the product development from scratch.

- Architect scalable, distributed and large-scale web and mobile solutions from scratch.

- Code for fresh development and to troubleshoot and resolve issues.

- Writing reusable, testable, and efficient code.

- Creating database schemas that represent and support business processes.

- Design and implementation of low-latency, high-availability, and performant applications.

- Able to learn & implement new technology/framework/library at God Speed.

- Customer-focused, react well to changes, work with teams and be able to multitask.

- Experience and knowledge of open-source tools and frameworks, broader cutting edge technologies around server side development. 

Desired Candidate Profile:-

- A Bachelor's degree in Computer Science or related field(or combined with related experience)

- Strong Expertise in Node.js/Javascript

- Hands-on experience in writing Node.js applications

- Deep knowledge of Restful APIs, Web Services, command-line programs and solid design principles.

- Knowledge of Node.js and frameworks like Express.js,Sails.js,StrongLoop, Meteor,Loopback.js, etc

- Knowledge of SQL and NoSQL database(MongoDB)

- Knowledge of tools like Docker, Git, Postman, JSdocs, etc.

- Well versed with front-end technologies - HTML5, and CSS3, AWS, GCP, Azure, Good hold on CLI command, OS

- Proficiency in multiple programming languages, both dynamic(Javascript, Python, Ruby, etc.) and strongly typed object-oriented language.

- Implementing automated testing platforms and unit tests.

- Must be a proven performer and team player that enjoys challenging assignments in a high energy, fast growing and start-up workplace.

- Good communication and interpersonal skills

Rejolut - As a Career Differentiator

 - We are a young and dynamic team who are obsessed with solving futuristic and evolutionary business problems at scale with the next generation technology like blockchain, crypto and machine learning. Focuses on empowering people across the globe to be technically efficient, making advancements in technology and providing new capabilities that were previously thought impossible.

- We provide exposure to higher learning opportunities so that you can work on complex and cutting edge technology like React, React Native, Flutter, NodeJS, Python, Go, Svelte, WebAssembly. Strong expertise in  blockchain and crypto technology and working with the networks like Hedera Hashgraph, Tezos, BlockApps, Algorand, Cardano.

- We maintain high end transparency with clients and employees as Visibility unlocks Efficiency and trust unlocks Visibility.

- Company is backed by two technology Co-founders, well-versed with consumer applications and their work has been downloaded millions of times and have led teams in leadership positions in companies like Samsung, Purplle, Loylty Rewardz.

Benefits :

> Health Insurance

> Work from Home

> Fast growth and more visibility into the company

> Experience to work on the latest technology

> Competitive Learning Environment with supportive co-workers

> Employee friendly HR Policies

> Paid leaves up to certain limits

> Competitive salaries & Bonuses

> Liberal working atmosphere

> Get mentored by the best in the industry

Schedule:

- Day Shift/Flexible working hours

- Monday to Friday

About the Role

If you are interested in developing the future architecture of Uber's Rider stack by building its core building blocks, join the Rider Backend Platform team. We build backend architectural components and frameworks comprising of services, libraries, state storage and other building blocks that aim to optimise the core Rider flow and foundational features that are shared among all rider products, including but not limited to, Uber Rider app, UberLite, m.uber.com, etc.

What You'll Do

• Work with Rider product engineering teams to identify, design and build solutions that help scale Rider services and platforms.
• Drive adoption of best practices in code health, testing, and maintainability
• Analyze and decompose complex software systems and collaborate with cross-functional teams to influence design for scalability and testability
• Work with smart and motivated teammates in a fast-paced, collaborative environment.
• Build elegant backend platform components for high throughput and low latency distributed systems.
• Solve challenging problems with cutting edge design and algorithms.

What You'll Need

• 4+ years Strong meaningful Individual contributor experience as a software engineer
• Design: Knowledge of data structures and an eye for design. You can discuss the tradeoff between design choices, both on a theoretical level and on an applied level.
• Strong coding/debugging abilities: You have advanced knowledge of at least one programming language, and are happy to learn more. Our core languages are Go and Java.
• Fast learner: We're looking for software engineers who thrive on learning new technologies and don't believe in one-size-fits-all solutions. You should be able to adapt easily to meet the needs of our massive growth and rapidly evolving business environment.
• A team player: You believe that you can achieve more on a team -- that the whole is greater than the sum of its parts. You rely on others' candid feedback for continuous improvement.

• Business acumen: You understand requirements beyond the written word. Whether you're working on an API used by other developers, an internal tool consumed by our operation teams, or a feature used by millions of customers, your attention to details leads to a delightful user experience.

About the Team: **Rider Backend Platform**

Builds the core building blocks needed to power the rider experiences on the different Rider facing apps including the core Uber app, Uber Lite, Web as we move on to become the preferred transportation platform for millions of riders all over the world.

Uber

At Uber, we ignite opportunity by setting the world in motion. We take on big problems to help drivers, riders, delivery partners, and eaters get moving in more than 600 cities around the world.

We welcome people from all backgrounds who seek the opportunity to help build a future where everyone and everything can move independently. If you have the curiosity, passion, and collaborative spirit, work with us, and let's move the world forward, together.