Java & Microservices

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.

About Unilog

Unilog is the only connected product content and eCommerce provider serving the Wholesale Distribution, Manufacturing, and Specialty Retail industries. Our flagship CX1 Platform is at the center of some of the most successful digital transformations in North America. CX1 Platform’s syndicated product content, integrated eCommerce storefront, and automated PIM tool simplify our customers' path to success in the digital marketplace.

With more than 500 customers, Unilog is uniquely positioned as the leader in eCommerce and product content for Wholesale Distribution, Manufacturing, and Specialty Retail.

Unilog’s Mission Statement

At Unilog, our mission is to provide purpose-built connected product content and eCommerce solutions that empower our customers to succeed in the face of intense competition. By virtue of living our mission, we are able to transform the way Wholesale Distributors, Manufacturers, and Specialty Retailers go to market. We help our customers extend a digital version of their business and accelerate their growth.

Job Details

• Designation: Principal Engineer – Solr
• Location: Bangalore / Mysore / Remote
• Job Type: Full-time
• Department: Software R&D

Job Summary

We are seeking a highly skilled and experienced Principal Engineer with a strong background in Apache Solr and Java to lead our Engineering and customer-led initiatives. The ideal candidate will be responsible for ensuring the reliability, scalability, and performance of our search platform while providing expert-level troubleshooting and resolution for critical production issues.

This role will involve designing the architecture for new platforms while reviewing and recommending better approaches for existing ones to drive continuous improvement and efficiency.

Key Responsibilities

• Lead Engineering and support activities for Solr-based search applications, ensuring minimal downtime and optimal performance
• Design and develop the architecture of new platforms while reviewing and recommending better approaches for existing ones
• Regularly work towards enhancing search ranking, query understanding, and retrieval effectiveness
• Diagnose, troubleshoot, and resolve complex technical issues in Solr, Java-based applications, and supporting infrastructure
• Perform deep-dive analysis of logs, performance metrics, and alerts to proactively prevent incidents
• Optimize Solr indexes, queries, and configurations to enhance search performance and reliability
• Work closely with development, operations, and business teams to drive improvements in system stability and efficiency
• Implement monitoring tools, dashboards, and alerting mechanisms to enhance observability and proactive issue detection
• Exposure to AI-based search using vector databases, RAG models, NLP, and LLMs
• Collaborate on capacity planning, system scaling, and disaster recovery strategies for mission-critical search systems
• Provide mentorship and technical guidance to junior engineers and support teams
• Drive innovation by tracking latest trends, emerging technologies, and best practices in AI-based Search, Solr, and other search platforms

Requirement

• 8+ years of experience in software development and production support with a focus on Apache Solr, Java, and databases (Oracle, MySQL, PostgreSQL, etc.)
• Strong understanding of Solr indexing, query execution, schema design, configuration, and tuning
• Experience in designing and implementing scalable system architectures for search platforms
• Proven ability to review and assess existing platform architectures, identifying areas for improvement and recommending better approaches
• Proficiency in Java, Spring Boot, and micro-services architectures
• Experience with Linux / Unix-based environments, shell scripting, and debugging production systems
• Hands-on experience with monitoring tools (e.g., Prometheus, Grafana, Splunk, ELK Stack) and log analysis
• Expertise in troubleshooting performance issues related to Solr, JVM tuning, and memory management
• Familiarity with cloud platforms such as AWS, Azure, or GCP and containerization technologies like Docker / Kubernetes
• Strong analytical and problem-solving skills, with the ability to work under pressure in a fast-paced environment
• Certifications in Solr, Java, or cloud technologies
• Excellent communication and leadership abilities

About Our Benefits

• Competitive salary
• Health insurance
• Retirement plan
• Paid time off
• Training and development opportunities

• Design, develop, code and test the solution

• Experience working with large datasets and NoSQL database technologies (e.g. Cassandra, ES) 

• 5-10 yrs of industry experience

• Energetic self-starter, with a desire to work in a startup environment

• Proficient in advanced Java programming skills

• Expert in Application development cloud/on premise end to end. Middle layer, DB layer.

• Nice to have understanding on MQ (e.g. Kafka)

• Good hands on in Complex Event Processing systems

• Solved scale and performance issues while dealing with huge sets of data. Pre compute or data aggregation frameworks to achieve good response time

• Experience working with large datasets and NoSQL database technologies (e.g. Cassandra, ES)

• Experience of debugging applications running on Unix like systems (e.g. Ubuntu, CentOS)

• Experience developing RESTful APIs for complex data sets

• Knowledge of container based development & deployment (e.g. Dockers, K8s)

• Expertise in software security domain, a plus

Microsoft Azure Data Integration Engineer

Job Description: 

Microsoft Azure Data Integration Developer who will design and build cutting-edge user experiences for our client’s consumer-facing desktop application. The Senior Software Developer will work closely with product owners, UX designers, front-end, and back-end developers to help build the next-generation platform. 

Key Skills:

• 3+ years of experience in an enterprise or consumer software development environment using C# and designing and supporting Azure environments
• Expert level programming skills in creating MVC and Microservices architecture
• Experience with modern frameworks and design patterns like .Net core
• Strong knowledge of C# language
• Hands-on experience using the Azure administration portal and iPaaS
• Demonstrable experience deploying enterprise workloads to Azure
• Hands-on experience in Azure function apps, app service, logic apps and storage, Azure Key vault integration, and Azure Sql database.
• Solid understanding of object-oriented programming.
• Experience developing user interfaces and customizing UI controls/components

·      Microsoft Azure Certification, Business Continuity, or Disaster Recovery planning experience is a plus

Responsibilities:

• Architect, design & build a modern web application for consumers
• Explore configuring hybrid connectivity between on-premises environments and Azure, and how to monitor network performance to comply with service-level agreements.
• Collaborate with UI/UX teams to deliver high-performing and easy-to-use applications
• Participate in code reviews with staff as necessary to ensure a high-quality, performant product
• Develop a deep understanding of client goals and objectives, and articulate how your solutions address their needs
• Unit testing/test-driven development
• Integration testing
• Deploying Azure VMs (Windows Server) in a highly available environment
• Regularly reviewing existing systems and making recommendations for improvements.
• Maintenance
• Post-deployment production support and troubleshooting

Technical Expertise and Familiarity:

• Cloud Technologies: Azure, iPaaS
• Microsoft: .NET Core, ASP.NET, MVC, C#
• Frameworks/Technologies: MVC, Microservices, Web Services, REST API, Java Script, JQuery, CSS, Testing Frameworks
• IDEs: Visual Studio, VS Code
• Databases: MS SQL Server, Azure SQL
• Familiarity with Agile software development methodologies.
• Advanced knowledge of using Git source control system.
• Azure, AWS, and GCP certifications preferred.

• 3-8+ years of experience programming in a backend language (Java / Python), with a good understanding of troubleshooting errors. 
• 5+ years of experience in Confluent Kafka / 3+ years of experience in Confluent Kafka 

• Cloud Kafka, Control Central, Rest Proxy, HA Proxy, Confluent Kafka Connect, Confluent Kafka Security features 

# Responsibilities:

• Build the APIs and internal mechanisms of the backend across all our services.
• Architect and provide guidance on building end-to-end systems optimized for speed and scale.
• Build and lead engineering teams to achieve product roadmap milestones.
• Oversee the research and development of new products and technologies.
• Engage with inspiring designers and front-end engineers, and collaborate with leading back-end engineers as we create reliable APIs
• Represent and evangelize engineering team in events, talks, conferences, etc.
• Be available for troubleshooting in case of backend emergencies.

# Requirements:

• Bachelor's in Computer Science or any Engineering domain with experience in Software Programming.
• 2-5 years of experience building large-scale software applications.
• Highly proficient with Java and knowledge of the many intricacies of Spring Boot.
• Proficient with MongoDB and Redis. Knowledge of Aerospike, other databases would be a bonus.
• Good understanding of distributed systems (servers, databases, etc.).
• Positive and solution-oriented mindset and comfort working in a highly agile, intensely iterative software development environment.

Role Description :

- Good Understanding of Java 8 with proven hands-on skills
- Experience in Spring Framework - Spring Boot, Spring Data, Spring REST
- Experience in Spring Reactive
- Experience in Git, Gradle / Maven
- Practitioner of clean code and SOLID principles
- Able to test drive features
- Can debug code at ease and ensure quality code is produced
- Knowledge of design patterns
- Comfortable with agile practices, user stories and task breakdown
- Understands REST principles and Micro services
- Experienced with technologies such as
- Required Java, Spring Boot
- Good to have Maven, GIT, Swagger, PCF, Rabbit MQ
- Good API skills technology such as Rest Webservice
- Good foundation in data structures, algorithms and OO Design with rock solid programming skills
- Experienced on creating unit test using JUnit, Mockito or PowerMock
- Experienced on mark up language such as JSON and YML
- Experienced on using Quality and Security scan tools such as Sonar, Fortify and WebInspect
- Experienced on agile methodology

Design and develop robust services in coordination with front-end developers, ensuring the production and development of high-quality and well-tested code

Design, develop and test features alongside other technical departments

Lead the department in the design, development, deployment, and operation of services used by our users

Optimise APIs for any applications while creating and maintaining unit tests for new code as well as fix defects

Participate in the continuous integration of automated builds and deployments, ensuring that deliverables meet functional and design requirements and specifications of the site/software. Work with engineering leadership in solving and architecting solutions for challenging or complex site/software development issues.

Take initiatives in developing and maintaining integrations of best practices within the backend department

• You will design, build and own APIs and Services, which will be the core of the product.
• You will participate in continuing education and training to remain current on best practices, learn new programming languages, and better assist other team members.
• You will part of developing ideas for new programs, products, or features by monitoring industry developments and trends.
• You will have to take lead on projects, compile and analyze data, processes, and codes to troubleshoot problems and identify areas of improvement.

REQUIREMENTS

• 3-5 years of experience in building highly scalable backend systems.
• Fluency or understanding of specific languages, such as JAVA, Operating System may be required, and Experience in Databases such as MySQL or Postgre SQL
• Strong understanding of Computer Science Fundamentals, Data Structures and Algorithms, SOLID Design Principles, and REST Patterns.
• Focus on efficiency, user experience, and process improvement.
• Excellent project and time management skills.
• Strong problem-solving and communication skills.
• Ability to work independently or with a group