MySQL / Oracle / PostgreSQL
2. Experience building at least one application from scratch
3. Understanding of at least one test frameworks and basic system administration
4. Experience with cache store / message broker like Redis / RabbitMQ / Kafka
5. Good to have: Experience with NoSQL databases like Cassandra, MongoDb, Neo4j, ElasticSearch
etc and Understanding of different concurrency models used in Akka, node.js, Go, RxJava etc
6. Interest in learning new languages / framework as needed
7. A growth mindset and passionate about building things from the ground up and most
importantly, you should be fun to work with

About 91social
About
Connect with the team
Similar jobs
Job Summary
We are looking for a highly skilled Senior Java/Kotlin Developer with strong experience in Microservices Architecture and AWS Cloud. The ideal candidate should have hands-on expertise in designing, developing, and deploying scalable microservices-based applications using Java/Kotlin and AWS services.
Key Responsibilities
- Design and develop scalable, secure, and high-performance microservices using Java and/or Kotlin
- Build RESTful APIs using frameworks like Spring Boot / Spring Cloud
- Develop and deploy cloud-native applications on AWS
- Implement containerized applications using Docker and orchestrate using Kubernetes / EKS
- Work with messaging systems like Kafka / SQS
- Implement CI/CD pipelines using tools like Jenkins / GitHub Actions
- Ensure best practices in system design, code quality, testing, and security
- Collaborate with cross-functional teams (DevOps, QA, Product)
- Participate in code reviews and mentor junior developers
Required Skills
- 5+ years of strong experience in Java development
- Hands-on experience in Kotlin
- Strong knowledge of Microservices Architecture
- Experience with Spring Boot, Spring MVC, Spring Security
- Strong experience in AWS services such as:
- EC2
- S3
- RDS
- Lambda
- ECS/EKS
- API Gateway
- SQS/SNS
- Experience with Docker & Kubernetes
- Strong understanding of REST APIs and distributed systems
- Experience with relational databases (MySQL/PostgreSQL) and NoSQL (MongoDB/DynamoDB)
- Good understanding of design patterns and clean architecture
- Experience in Agile/Scrum methodology
Job Description:
- Experience in Core Java, Spring Boot.
- Experience in microservices.
- Extensive experience in developing enterprise-scale systems for global organization. Should possess good architectural knowledge and be aware of enterprise application design patterns.
- Should be able to analyze, design, develop and test complex, low-latency client-facing applications.
- Good development experience with RDBMS in SQL Server, Postgres, Oracle or DB2
- Good knowledge of multi-threading
- Basic working knowledge of Unix/Linux
- Excellent problem solving and coding skills in Java
- Strong interpersonal, communication and analytical skills.
- Should be able to express their design ideas and thoughts.
About Wissen Technology:
Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals.
Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always ‘first time right’.
Our team consists of 1200+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.
Wissen Technology offers an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
We have been certified as a Great Place to Work® for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.
- Proven hands-on Software Development experience
- Proven working experience in Java development
- Hands on experience in designing and developing applications using Java EE platforms
- Object Oriented analysis and design using common design patterns.
- Profound insight of Java and JEE internals (Classloading, Memory Management, Transaction management etc)
- Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2, Hibernate)
- Experience in the Spring Framework
- Experience as a Sun Certified Java Developer
- Experience in developing web applications using at least one popular web
• Solid experience with application frameworks such as Springboot and strong familiarty with micro services architecture and design patterns
• Familiarity with databases like MySQL, MongoDB, Redis etc
• Hands-on experience in analysis, design, coding, and implementation of complex, custom-built applications
• Exposure to CI/CD using Gitlab, Jenkins preferred
• Familiarity with Docker, Kubernetes, EFK Stack is highly desired
• Broad knowledge of web standards relating to APIs (OAuth, SSL etc.)
• Exposure to product development.
• Understand Architecture Requirements and ensure effective design, development and maintenance of multiple micro services in Java Springboot deployed in cloud within containers consuming data present in relational as well as NoSQL databases.
o The microservices shall expose APIs which allow ease of integration with variety of client apps
o Microservices should handle a scale of thousands of requests per second
• Develop communication patterns between microservices which are efficient, lightweight and secured using Kafka
• Debugging issues on a live setup
• Lead a small team of engineers
• Create test cases and technical documentation
• Maintain a high level of code quality and consistency by adhering to and enhancing the coding standards, design methodology and programming practices
Requirements:
- Experience in Enterprise Java building restful microservices
- Strong Exposure to any of the Java Enterprise frameworks such as Spring, Vert. x, Quarkus or others
- Good exposure to databases such as PostgreSQL, MongoDB etc
- Good analytical and problem-solving capabilities along with excellent communication skills.
- Any exposure to UI programming using REACT JS or AngularJS is a plus
- Preferred candidate who can join in 15 days or max 30 days.

Proficient in Java, J2EE and related technologies.
• Experienced in using spring, Spring Boot, Hibernate, messaging systems.
• Good understanding of relational database performance concepts and usage of ORM frameworks such as Hibernate
• Expert understanding of the object-oriented design and programming concepts
• Strong working experience on Data Structures, Algorithms and Collections.
• Solid experience building applications on top of RESTful APIs.
• Knowledge/experience with Spring MVC
• Stroing knowledge in developing and executing automated unit, functional and integration tests
• Good communication and analytical skills.
• Strong trouble shooting skills
• Atleast 5+ years of experience in Java development (J2EE, J2SE 8)
• Atleast 3+ years for EDI development experience.
• Degree, diploma or Certificate in Computer Science or IT.
* Troubleshooting of FTP networking for all EDI situations, sets up and edits all SQL reports. * Bring out and supervises all self loading scripts to guarantee effective EDI document travel. * Monitor effective working of all the given projects, manages various departments to provide efficiency for support staff, makes all EDI maps, business procedures and works out all the execution issues. * Experience in preparing all cost advice reference papers and takes part in different test developments, enforcement plans, strategies and supervises all communication for projects as per work plan. * Experience in dealing with all the scheme or system designs and follows through new designs and helps to enforce brand for all the new clients. * Coordination with non EDI sources to fix, design and implement all the answers for the same, and makes all data map to guarantee effective management of all dealings. * Experience in helping to all the e-trade dealings and the trade units in same processes and comes up with an update on architecture if needed. * Experience in leading projects that support the EDI techie regions, and helps the other projects as characterized by the team lead of applications development. * Experience in functioning as a direct liasion with fundamental users in limited structural areas of the trade. * Experience in EDI procedures and daily functions to ensure best performance, completeness and superiority.
Job Description:
Perform high quality software analysis, development, testing and maintenance for the client’s core technology platform
* Work with Product owners, Architects and X-Vertical teams to analyse requirements.
* Implement the features based on the design.
* Follow good development practices.
* Product deployment and support.
* Mentor junior developers.
Job Requirements
* Excellent analytical skills and problem solving skills.
* Expert in JEE/ Java programming.
* Competent in delivering a high quality product.
* Competent in software engineering tools and best practices
* Conversant in web front-end technologies - HTML5/CSS/JavaScript
* Object-oriented Design and Analysis (OOA and OOD)
* Estimate engineering effort; plan implementation, and rollout system changes.
* Exhibit creativity and resourcefulness at problem solving while collaborating and working effectively with best in class designers, engineers of different technical backgrounds, architects and product managers.
* Expert in data structures and algorithms.
* Aware of Agile methodology of Software Development Life Cycle.
* Should be a self-starter and a good team player.
* Great communication skills both verbal and written to ensure effective communication across product teams, functions and locations.
* Can make decisions without always asking others what has to be done.
* Ability to mentor junior developers.
* Experience working with remote teams.
* Flexible to work on any technology as per project demand.
Today, MoEngage is an industry pioneer in the space and engages more than 350M devices. This includes approximately 40B events tracked per month, 30B+ messages sent, to millions of users across the globe.
As part of the Engineering team at MoEngage, here are some things you can expect:
- Take ownership and be responsible for what you build - no micro management
- Work with A players (some of the best talent in the country), and expedite your learning curve and career growth
- Make in India and build for the world at scale of 350M active users, which no other internet company in the country has seen
- Learn together from different teams on how they scale to millions of users and billions of messages.
- Explore the latest in topics like Data Pipeline, MongoDB, ElasticSearch, Kafka, Spark, Samza and share with the team and more importantly have fun while you work on scaling MoEngage.
Skills required:
- Minimum 2 year experience in Android Development
- Good understanding of Java Programming language
- OOPs concepts
- Multi-threading
- Good understanding of Android Framework
- Framework Components
- Data Storage/Persistence
- Offline support for application
- Rest APIs
Good to Have:
- Knowledge and understanding of Kotlin
- Experience in building dynamic UI
- Knowledge of hybrid frameworks like React-Native/Cordova/Xamarin/Flutter, etc.






