Java Developer

JOB DESCRIPTION

Experience: 4-7 years

Location: Bangalore

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. - 4-7 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.

Remote Opportunity

Contact Center Solution Design and Implementation

IVR Systems Development (Google CCAI, Genesys Cloud, Amazon Connect, Five9, Cisco, Avaya, or other CCaaS platforms)

API, Web Services, Messaging, CMS, Ticketing Systems, and Backend Integrations

Automatic Call Distribution (ACD), Computer Telephony Integration (CTI), Call Routing, Queues, RTI, Queue Management, Skill-Based Routing, and Escalation Paths

Live Agent Operations (Disposition Codes, AHT, Warm/Cold Transfers)

Call Flow, Agent Script, and Customer Workflow Design

SIP and Telephony Integration

Communication and Interpersonal Skills

Team Collaboration and Independent Work Abilities

Java Tech Lead (5–6 Years Experience)

About the Role

We are seeking a highly skilled Java Tech Lead with 5–6 years of hands-on experience in backend engineering, architecture design, and leading development teams. 

The ideal candidate will combine strong technical expertise in Java frameworks with a deep understanding of system design, scalability, and performance optimization.

This role involves technical leadership, code reviews, and architectural decision-making for complex enterprise systems — with occasional exposure to analytics-driven and Python-based components.

Key Responsibilities

• Architect, design, and develop scalable backend systems using Java (Quarkus, Spring Boot, Spring, Java EE).
• Own the architecture — ensure modular, extensible, and high-performance service design.
• Lead and mentor a team of developers; conduct code reviews, enforce best practices, and ensure high code quality.
• Collaborate with cross-functional teams (frontend, DevOps, product, data) to deliver integrated, end-to-end solutions.
• Design and optimize database schemas (MySQL, PostgreSQL) and ensure efficient query performance.
• Implement and maintain microservices and distributed systems with strong fault tolerance and observability.
• Drive the adoption of modern development workflows — Git branching strategy, CI/CD, and code quality automation.
• Analyze system performance bottlenecks, implement monitoring, and ensure smooth production deployments.
• Contribute to architecture reviews, technical documentation, and design discussions.
• Occasionally contribute to Python-based analytics modules or automation scripts.
• Work with AWS cloud services (EC2, S3, RDS, Lambda) for deployment, scaling, and infrastructure automation.

Required Skills & Qualifications

• 5–6 years of professional experience in backend application development using Java.
• Strong proficiency in Java frameworks: Quarkus, Spring Boot, Spring, Java EE.
• Proven experience in architecture design, system decomposition, and microservices design principles.
• Solid understanding of object-oriented design (OOD), design patterns, and SOLID principles.
• Strong experience with relational databases (MySQL, PostgreSQL) and query optimization.
• Good understanding of event-driven systems, RESTful APIs, and asynchronous processing.
• Proficiency in Git for version control and team collaboration.
• Strong analytical and debugging skills; ability to diagnose complex production issues.

Good to Have

• Hands-on experience with Python for data processing or analytics integrations.
• Familiarity with AWS cloud architecture and cost optimization practices.
• Experience with CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI).
• Knowledge of Docker/Kubernetes for containerized deployments.
• Exposure to NoSQL databases (MongoDB, DynamoDB, Cassandra).
• Experience with message queues (Kafka, RabbitMQ, or AWS SQS).
• Understanding of system scalability, caching (Redis/Memcached), and observability stacks (Prometheus, Grafana, ELK).

Soft Skills

• Strong leadership, mentoring, and communication skills.
• Proven ability to drive technical decisions and balance short-term delivery with long-term architectural health.
• Collaborative mindset — works closely with product, design, and operations teams.
• Passion for clean architecture, high performance, and continuous improvement.
• Self-driven with a strong sense of ownership and accountability.

Title: Cloud DevOps Engineer 

Role: Individual Contributor (4-8 yrs)  

Requirements: 

• Energetic self-starter, a fast learner, with a desire to work in a startup environment  
• Experience working with Public Clouds like AWS 

• Operating and Monitoring cloud infrastructure on AWS. 
• Primary focus on building, implementing and managing operational support 
• Design, Develop and Troubleshoot Automation scripts (Configuration/Infrastructure as code or others) for Managing Infrastructure. 
• Expert at one of the scripting languages – Python, shell, etc  
• Experience with Nginx/HAProxy, ELK Stack, Ansible, Terraform, Prometheus-Grafana stack, etc 

• Handling load monitoring, capacity planning, and services monitoring. 
• Proven experience With CICD Pipelines and Handling Database Upgrade Related Issues. 
• Good Understanding and experience in working with Containerized environments like Kubernetes and Datastores like Cassandra, Elasticsearch, MongoDB, etc

• Work with product and business stakeholders to prepare test cases and plan
• Build, enhance and maintain automation frameworks for scalability, stability, and performance
• Write new automated tests for existing and new features
• Collaborate with QA Engineers to develop effective strategies and test case documentation
• Create logs to document testing phases and defects
• Report bugs and drive them to closure by collaborating with development teams
• Conduct post-release/ post-implementation testing
• Work with cross-functional teams to ensure quality throughout the software development lifecycle

What Makes You A Great Fit

• Experience with test frameworks, regression testing, and QA methodology
• Ability to document and troubleshoot errors
• Desire to be a perfectionist

• Developer/Senior Developer Role in Javascript/React
• Design and Develop Libraries for React
• Strong analytical skills - ability to turn business requirements into technical concepts and code
  • Minimum 3 years of experience in React (at least 3 projects) and familiar with modern React (Hooks, Context API)
  • At least one PWA project
  • Deep knowledge of Typescript (at least 2 years)
  • Excellent problem solving and communication skill
  • Used to writing automated tests with tools like Jest & Cypress
  • Working with a ticket tool like Jira
  • Experience with SCRUM/Agile Development
  • Experiences with NodeJS is a plus
  • Experiences with Monorepositorys and Nx is a plus

Mobile App Development:-

We are looking for 2 - 3 years of overall mobile app development experience out of which experience of at least 2+ years in developing native and hybrid mobile applications Should have handled end-to-end designing, development, testing, and deployment on any native Android/iOS platform.

Hands-on experience with native development will add advantage, Angular 6+ Excellent technical knowledge on HTML5, CSS3, JQuery, JQuery Mobile, AJAX, XML, JSON, Java, Bootstrap, PhoneGap, Angular JS.

Should have working experience in consuming Web Service and REST API.

Experience in Business Object Model implementation data integration with JSON/XML Designing and implementing different analytics interfaces such as charts, graphs etc.

Should have knowledge of App signing, publishing to Play-store and iTunes Well versed with code management like GIT, SVN Should be a team player

Roles and Responsibilities:-

• Develop hybrid mobile applications & deliver across the entire app life cycle concept,
• design, build, deploy, test, release to app stores.
• Work directly with the tech team to conceptualize, build, test, and realize products.
• Test the app on devices and Deploy it on Apple Store & Google Play Store.
• Standardizing the platform and in some cases apps to deliver across multiple brands with minimal duplication of effort and Optimizing performance for the apps.