
Job Description
- Design & implement backend APIs
- Mentor junior developers technically.
- Actively work to reduce tech debt in the backend
- Work towards more stability & scalability of the backend
- Tech stack - Java, AWS, Aurora etc.
Eligibility
- 4-8 years of product company experience
- OOP implementation experience. Programming language does not matter. We use Java internally but have hired folks from non Java background.
- Hands on experience in SQL, Dynamo DB, Postgres etc preferred.
- Prior experience building REST APIs
- Advanced understanding of AWS stack
- Prior knowledge of solving problems at scale.

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JOB DESCRIPTION
Experience: 5-8 years
Location: Mumbai
Wissen Technology is now hiring for a Java Developer - Bangalore with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting.
Required Skills:
- Exp. - 5-8 years
- Experience in Core Java and Spring Boot.
- Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
- Should have the ability to analyze, design, develop and test complex, low-latency client- facing applications.
- Good development experience with RDBMS.
- Good knowledge of multi-threading and high-performance server-side development.
- Basic working knowledge of Unix/Linux.
- Excellent problem solving and coding skills.
- Strong interpersonal, communication and analytical skills.
- Should have the ability to express their design ideas and thoughts.
A backend developer is an engineer who can handle all the work of databases, servers,
systems engineering, and clients. Depending on the project, what customers need may
be a mobile stack, a Web stack, or a native application stack.
You will be responsible for:
Build reusable code and libraries for future use.
Own & build new modules/features end-to-end independently.
Collaborate with other team members and stakeholders.
Required Skills :
Thorough understanding of Node.js and Typescript.
Excellence in at least one framework like strongloop loopback, express.js, sail.js, etc.
Basic architectural understanding of modern day web applications
Diligence for coding standards
Must be good with git and git workflow
Experience of external integrations is a plus
Working knowledge of AWS or GCP or Azure - Expertise with linux based systems
Experience with CI/CD tools like jenkins is a plus.
Experience with testing and automation frameworks.
Extensive understanding of RDBMS systems
- Experience in managing medium to large scale application project from beginning to end, with skills in requirement study and functional/detail design, QA, testing, and software change/version control management is advantageous
- Expertise in application development, and familiar with C#, Asp.net, jQuery, Webservice (REST/SOAP), Microservice, WCF
- Basic Equities Trading product knowledge is expected
- Familiarity with Equities/trade processing experience is an advantage
- Strong analytical and problem-solving skill is a must
- Ability to work under pressure, handle multiple tasks and work to tight deadlines.
- High sense of ownership of task assigned, deliver applications with high quality and efficiency.
- Good communication, inter-personnel skills is required
- Team player with strong interpersonal and communications skills
- Looking for 4 – 8 years’ experience in .NET
Job Description:
Minimum 3+ years of experience
Java, OOPS, Data structure, Design Patterns, Multithreading, Spring, Hibernate, Java Script based technology, knowledge of J2EE, PL - SQL..
Core Java Topics including Language Features, Architecture.
OOP Concepts in depth with real time scenarios
Understandings of special Keywords and their applicability as well as advantages and
disadvantages - Like static, final, this, super etc. static should be in depth
Singleton class, Serialization, Cloning, Anonymous Inner class concepts.
In depth concept of Dynamic and static polymorphism & Multiple Inheritance issue/ resolve.
Concepts on String, Exception Handling, Array etc.
Java SE 8 and 9 Features: Functional Inheritance, Lambda Expression, default and static method
etc.
Collection Classes in detail along with the internal data structure and working principle.
Multithreading concept. Concept on ConcurrentHashMap etc.
Analysis of Algorithm - Time Complexity – Big O Calculation
Code Optimizing techniques, Different Algorithm designs and strategies.
Design patterns in Java
Different Sorting & Searching Algo with their Time complexity analysis
Problem solving using Hackerrank or similar sites, with focus on Arrays, Linked Lists, Hash Maps,
Trees, Balanced Trees, Stacks, Queues, Strings , Big Number , Data Structures, Object Oriented
Programming
Exception Handling – Advanced, Sorting, Search, Recursion, Graph Theory.
Note: Core Java + PL/SQL (Unix will be add on)
About Rara Delivery
Not just a delivery company…
RaRa Delivery is revolutionising instant delivery for e-commerce in Indonesia through data driven logistics.
RaRa Delivery is making instant and same-day deliveries scalable and cost-effective by leveraging a differentiated operating model and real-time optimisation technology. RaRa makes it possible for anyone, anywhere to get same day delivery in Indonesia. While others are focusing on ‘one-to-one’ deliveries, the company has developed proprietary, real-time batching tech to do ‘many-to-many’ deliveries within a few hours.. RaRa is already in partnership with some of the top eCommerce players in Indonesia like Blibli, Sayurbox, Kopi Kenangan and many more.
We are a distributed team with the company headquartered in Singapore 🇸🇬 , core operations in Indonesia 🇮🇩 and technology team based out of India 🇮🇳
Future of eCommerce Logistics.
- Data driven logistics company that is bringing in same day delivery revolution in Indonesia 🇮🇩
- Revolutionising delivery as an experience
- Empowering D2C Sellers with logistics as the core technology
About the Role
- 5 - 7 years Experience with the following technologies: Core Java/J2EE, Spring Boot, Creating API, Hibernate, JDBC, SQL/PLSQL, messaging architecture, REST/Web services, Linux
- Expertise in application, data and infrastructure architecture disciplines
- Advanced knowledge of architecture, design and business processes
- 4+ years of Java, J2EE development experience
- Strong technical development experience in effectively writing code, performing code reviews, and implementing best practices on configuration management and code refactoring
- Experience in working with vendor applications
- Experience in making optimized queries to MySQL database
- Proven problem solving and analytical skills
- A delivery-focused approach to work and the ability to work without direction
- Experience in Agile development techniques, including Scrum
- Experience implementing and/or using Git
- Ability to work collaboratively in teams and develop meaningful relationships to achieve common goals
- Bachelor degree in Computer Science or related discipline preferred
Overview:
- Design and develop Rest APIs.
- Create documentation around processes including front-end design and service architecture.
- Follow industry trends regarding backend-end technologies and techniques.
- Agile rituals like Feature elaboration/Estimation, daily stand-ups, release planning, Iteration Planning Meeting, Retrospective, Showcase, etc.
- Build content and data driven enterprise level web application which works for Multiple clients in multiple countries.
Relevant experience and Exposure:
- 1+ years relevant work experience showing growth as a Backend developer.
- Extensive technical experience and development expertise in C#, .Net core, Web services (REST)
- Proficient with OOPS and Design principles.
- Expertise in writing clean, secure and refactored code.
- Knowledge and hands-on Experience with Test Driven Development.
- Experience with relational and non-relational Database technologies like SQL, MongoDB.
- Proficient with Git or any source code management tool.
- Excellent listening, writing skills and strong technical competency are essential.
- Creative and efficient in proposing solutions to complex, time-critical problems.
- Strong analytical and problem-solving skills with a high attention to detail.
Nice to haves:
- Experience with .Net core.
- Experience with public cloud offerings (AWS, Azure etc.).
- Knowledge of CI/CD tools like Jenkins, Docker, Spinnaker etc.
- Exposer to an Agile Development Methodology would be beneficial.
- Atlassian suit knowledge (Jira particular).
• Minimum 8+ Years of software development/programming experience.
• Any Bachelor’s or Master’s degree, not limiting to Engineering.
• Must be detail oriented.
• Experience with Agile methodologies.
• Strong communication skills and fluent in English (written and spoken)
• Keywords are team player, proactive, attention to detail, independent, strong analytical skills and
the ability to adapt to new challenges
Responsibilities:
• 8+ Years of software development/programming experience
• 3+ Years of experience in Drop-wizard/Spring Boot Microservice
• Strong experience building multi-threaded applications using Java 8 and above
• Experienced in Agile development methodologies / Continuous Integration
• Java Design Patterns
• Amazon AWS EC2/S3/RDS
• OpenAPI, Contract first development experience
• Strong Java Concurrency (Java Threading)
• DDD (Domain Driven Design)
• Testing frameworks Like Mockito
• Test driven development experience
• JIRA, Git, Github and Github actions
JAVA SPRING BOOT DEVELOPER - Immediate Joiners
Work Experience: 4-7 years
Work location: Hyderabad
Must Have Skills: Spring Boot
Desired Candidate Profile
Proficiency in core Java & Spring framework
Expertise in Web Service technologies.
Excellent knowledge in Databases and code integrations such as Postgres SQL, SQL Server, MySQL
Experience with Java Spring Boot, Hibernate Cloud Services, AWS, S3, Server-less lambda functions
Experience with security principles and frameworks
Knowledge of modern authorization mechanisms, such as JSON Web Token and OAuth2 - Familiarity with code versioning tools such as Git, etc.
Essential skills are Core Java/J2EE, functional aspects, Spring Framework, Swagger, Tomcat, SVN, Git, Postman/Newman.
Should have worked in Agile methodologies.
Good object oriented and problem solving skills.
Strong communication skills along with the ability to work in a highly collaborative environment.
Role & Responsibilities
- Design and develop features using Java, Spring, and Hibernate
- Ability to design database schema, develop views and stored procedures
- Maintain existing software systems by identifying and correcting software defects
- Review and analyse business requirements and provide technical feasibility and estimates
- Coordinate the workflow between the UX team and front end developers
Qualification
- 4-7 years of work experience developing Java-based backend applications
- Around 2 year of work experience using Spring Boot, Spring Cloud and Microservices
- Bachelor degree in computer science, or information technology, or other related field of study
Responsibilities:
Developing and maintaining all server-side network components.
Ensuring optimal performance of the central database and responsiveness to front-end requests.
Collaborating with front-end developers on the integration of elements.
Designing back-end services for various business processes.ses.
Developing high-performance applications by writing testable, reusable, and efficient code.
Implementing effective security protocols, data protection measures, and storage solutions.
Running diagnostic tests, repairing defects, and providing technical support.
Documenting Node.js processes, including database schemas, as well as preparing reports.
Recommending and implementing improvements to processes and technologies.
Keeping informed of advancements in the field of Node.js development.
Skills:
Bachelor's degree in computer science, information science, or similar.
At least two years' experience as a Node.js developer.
Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
Knowledge of front-end technologies such as HTML5 and CSS3.
Superb interpersonal, communication, and collaboration skills.
Exceptional analytical and problem-solving aptitude.
Great organizational and time management skills.
Availability to resolve urgent web application issues outside of business hours.











