


Proficient in Golang, Python, Java, C++, or Ruby (at least one)
Strong grasp of system design, data structures, and algorithms
Experience with RESTful APIs, relational and NoSQL databases
Proven ability to mentor developers and drive quality delivery
Track record of building high-performance, scalable systems
Excellent communication and problem-solving skills
Experience in consulting or contractor roles is a plus

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We are looking for a highly skilled Backend Developer with expertise in Core Java, Java 8, and Data Structures. The ideal candidate should have experience in Spring Boot, JPA/Hibernate, and Microservices architecture. If you are passionate about backend development and want to work in a dynamic environment, we’d love to hear from you!
Key Responsibilities:
- Develop and maintain backend applications using Core Java and Java 8.
- Design and implement RESTful and SOAP web services.
- Work with Spring Framework, Spring Boot, and JPA/Hibernate for backend development.
- Build and optimize microservices-based architectures.
- Manage databases such as PostgreSQL, MySQL, or Oracle.
- Collaborate with cross-functional teams to deliver high-quality software solutions.
- Write clean, efficient, and scalable code while following best practices.
Requirements:
✅ Strong hands-on experience in Java (Core Java, Java 8) and Data Structures.
✅ Proficiency in Spring, Spring Boot, JPA/Hibernate.
✅ Experience in developing and consuming RESTful & SOAP APIs.
✅ Knowledge of Microservices architecture and best practices.
✅ Database expertise in PostgreSQL, MySQL, or Oracle.
✅ Excellent verbal and written communication skills.
Nice to Have:
- Experience with Docker/Kubernetes.
- Knowledge of CI/CD pipelines and DevOps practices.
- Exposure to cloud platforms (AWS, GCP, or Azure).
Job Title -Senior Java Developers
Job Description - Backend Engineer - Lead (Java)
Mumbai, India | Engineering Team | Full-time
Are you passionate enough to be a crucial part of a highly analytical and scalable user engagement platform?
Are you ready learn new technologies and willing to step out of your comfort zone to explore and learn new skills?
If so, this is an opportunity for you to join a high-functioning team and make your mark on our organisation!
The Impact you will create:
- Build campaign generation services which can send app notifications at a speed of 10 million a minute
- Dashboards to show Real time key performance indicators to clients
- Develop complex user segmentation engines which creates segments on Terabytes of data within few seconds
- Building highly available & horizontally scalable platform services for ever growing data
- Use cloud based services like AWS Lambda for blazing fast throughput & auto scalability
- Work on complex analytics on terabytes of data like building Cohorts, Funnels, User path analysis, Recency Frequency & Monetary analysis at blazing speed
- You will build backend services and APIs to create scalable engineering systems.
- As an individual contributor, you will tackle some of our broadest technical challenges that requires deep technical knowledge, hands-on software development and seamless collaboration with all functions.
- You will envision and develop features that are highly reliable and fault tolerant to deliver a superior customer experience.
- Collaborating various highly-functional teams in the company to meet deliverables throughout the software development lifecycle.
- Identify and improvise areas of improvement through data insights and research.
What we look for?
- 5-9 years of experience in backend development and must have worked on Java/shell/Perl/python scripting.
- Solid understanding of engineering best practices, continuous integration, and incremental delivery.
- Strong analytical skills, debugging and troubleshooting skills, product line analysis.
- Follower of agile methodology (Sprint planning, working on JIRA, retrospective etc).
- Proficiency in usage of tools like Docker, Maven, Jenkins and knowledge on frameworks in Java like spring, spring boot, hibernate, JPA.
- Ability to design application modules using various concepts like object oriented, multi-threading, synchronization, caching, fault tolerance, sockets, various IPCs, database interfaces etc.
- Hands on experience on Redis, MySQL and streaming technologies like Kafka producer consumers and NoSQL databases like mongo dB/Cassandra.
- Knowledge about versioning like Git and deployment processes like CICD.
What’s in it for you?
- Immense growth, continuous learning and deliver the best to the top-notch brands
- Work with some of the most innovative brains
- Opportunity to explore your entrepreneurial mind-set
- Open culture where your creative bug gets activated.
If this sounds like a company you would like to be a part of, and a role you would thrive in, please don’t hold back from applying! We need your unique perspective for our continued innovation and success!
So let’s converse! Our inquisitive nature is all keen to know more about you.
Skills
JAVA, MONGO, Redis, Cassandra, Kafka, rabbitMQ
Experience:4-7years
Package: Exp- 3.5X max
Location: Hyderabad Location (WFO)
Skillset: Java developer with spring boot and microservices
Note: If you get selected you need to come and work in the office Hyderabad location


Requirements:
- Expert in Python, with good knowledge in Django technology.
- Able to integrate multiple data sources and databases into one system.
- Understanding of the threading limitations of Python, and multi-process architecture.
- Knowledge of user authentication and authorization between multiple systems, servers, and environments.
- Experience in Flask will be an add-on
- Understanding of fundamental design principles behind a scalable application.
- Familiarity with event-driven programming in Python.
- Able to create database schemas that represent and support business processes.
- Proficient understanding of code versioning tools.
- Good communication skills.

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:-
-Work with the team to develop world-class tools through practical development and collaboration with the open source Go community
-Interact with internal and external developers and communities
-Work with the toolchain team and other engineering teams as well as the community on senior-level feature contributions to Golang, related compiler bug fixes, efficiency improvements, and optimisations, and some light packaging work where needed
-Accept, analyze, and respond to bug reports against tools packages in your area of responsibility
-Plan and track development and periodically report progress to team management.
- 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:-
- 1+ years of experience in open source compiler or tools development
- 1+ years of experience with the Go language, runtime and tools
- Experience with or exposure to the Linux kernel is helpful
- Bachelor's degree or higher in computer science, computer engineering, or a technology-related discipline
The following requirements are a plus:
-Experience with C/C++ toolchains and debuggers
-Advanced knowledge of Go language, compiler, library, runtime, and debug internals
-Practical experience developing Go tools for enterprise use
-Direct experience with Go tools community participation
-Knowledge of and experience with system tools internals (e.g. compilers, debug formats)
-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
Out of which, an experience of 1 to 2 years in Spring Boot and Microservices is mandatory
Need to have an experience working on Digital Domain or E-Commerce Domain or Travel Domain
Strong experience with Java 8, Spring and Spring Boot, Spring MVC, Spring Data
Working experience on Microservices
Version Control: Git
Strong understanding of functional/reactive programing, OOP, design
Experience on Docker and Kubernetes.
SDLC: Working experience in Agile methodology
Strong written and verbal communication skills
Strong Interpersonal skills and Time Management skills
Immediate Joiners Preferred
Within maximum 30 days notice period can also apply
Currently remote working, however, post pandemic, candidates need to relocate to any of the location given above
Responsibilities / Requirements:
● Be hands-on implicated in the design and implementation of NestJs REST APIs.
● Work with DevOps engineers to scale and optimise NestJs micro-services.
● Must have an excellent understanding of how the web works.
● Extensive knowledge of OOP, Design Patterns, and SOLID Principles.
● Familiar with modern engineering practices: coding standards, code reviews, continuous deployment, automated testing.
● Must be willing to constantly learn new things.
● Knowledge of algorithms and data structures.
Technologies:- • Nestjs • TypeScript 3. MySQL • Docker • Kafka
Knowledge of NestJS would be preferable.

Responsibilities
Writing reusable, testable, and efficient code
Design and implementation of low-latency, high-availability, and performant applications
Integration of user-facing elements developed by front-end developers with server-side logic
Implementation of security and data protection
Skills And Qualifications
Developing an end-to-end application with the latest technologies like python, Django, MySQL and using Python Libraries like Sympy, Numpy, Scipy.
Working with front-end web development technologies like HTML, CSS, Bootstrap, JavaScript, Ajax, Jquery, etc.
Analyze and customize the source code as per business requirements.
Integrate the day-to-day develop code with a version control tool (we use git and GitHub)
Co-ordinate in development, deployment activities.
Expert in Python, with knowledge of at least one Python web framework (such as Django, Flask, etc depending on your technology stack)
Familiarity with some ORM (Object Relational Mapper) libraries
Able to integrate multiple data sources and databases into one system
Understanding of the threading limitations of Python, and multi-process architecture
Good understanding of server-side templating languages (such as Jinja 2, Mako, etc depending on your technology stack)
Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3
Understanding of accessibility and security compliance (depending on the specific project)
Knowledge of user authentication and authorization between multiple systems, servers, and environments
Understanding of fundamental design principles behind a scalable application
Familiarity with event-driven programming in Python
Understanding of the differences between multiple delivery platforms, such as mobile vs desktop, and optimizing output to match the specific platform
Able to create database schemas that represent and support business processes
Strong unit test and debugging skills
Proficient understanding of code versioning tools (such as Git, Mercurial or SVN)





