
• 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

About Concentric AI
About
About us:
Ask any CIO about corporate data and they’ll happily share all the work they’ve done to make their databases secure and compliant. Ask them about other sensitive information, like contracts, financial documents, and source code, and you’ll probably get a much less confident response. Few organizations have any insight into business-critical information stored in unstructured data.
There was a time when that didn’t matter. Those days are gone. Data is now accessible, copious, and dispersed, and it includes an alarming amount of business-critical information. It’s a target for both cybercriminals and regulators but securing it is incredibly difficult. It’s the data challenge of our generation.
Existing approaches aren’t doing the job. Keyword searches produce a bewildering array of possibly relevant documents that may or may not be business critical. Asking users to categorize documents requires extensive training and constant vigilance to make sure users are doing their part. What’s needed is an autonomous solution that can find and assess risk so you can secure your unstructured data wherever it lives.
That’s our mission. Concentric’s semantic intelligence solution reveals the meaning in your structured and unstructured data so you can fight off data loss and meet compliance and privacy mandates.
Check out our core cultural values and behavioural tenets here: https://concentric.ai/the-concentric-tenets-daily-behavior-to-aspire-to/
Tech stack
Candid answers by the company
Concentric AI is a US-based Series-A-funded startup. It has engineering offices in Bangalore, San Jose, and Pune.
We are in the data security domain and use AI and machine learning to solve customer use cases. Our customers, large and mid-size enterprise customers are across verticals.
Using Semantic Intelligence, we address data security without rules or regex or end-user involvement. Our product helps gain visibility into the who, where and how of an enterprise customer's sensitive data. A customer can automatically remediate and minimize data risk with Concentric AI.
You can go through details of Concentric product on our website - www.concentric.ai
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🧠 Job Description: Senior Java Developer (8+ Years Experience)
Location: Mumbai, India
Employment Type: Full-time, Hybrid mode of working
Company: Wissen Technology
Website: www.wissen.com
🚀 About Wissen Technology
Wissen Technology is a specialized technology consulting firm delivering cutting-edge solutions to global leaders in Banking & Finance, Telecom, and Healthcare. Established in 2015 and part of the Wissen Group (founded in 2000), Wissen has scaled rapidly with impressive impact and recognition.
- 🌍 Offices in US, UK, India, Australia, Mexico, and Canada
- 👥 1700+ Wissen Technology professionals; part of a 4500-strong Wissen Group
- 🏆 Great Place to Work® Certified
- 🧠 Featured as a Top 20 AI/ML Vendor (CIO Insider, 2020)
- 📈 Achieved 400% revenue growth in 5 years (with zero external funding)
- 💼 Delivered $1B+ worth of projects to 50+ Fortune 500 companies
Learn more about our work and thought leadership:
📄 Articles by Wissen | 💼 LinkedIn
About the Role
We are seeking an experienced Senior Java Developer with 8+ years of hands-on expertise in building scalable, high-performance applications. The ideal candidate will have strong fundamentals in Java, OOPS, Multithreading, Spring concepts, and SQL, and will play a key role in designing, developing, and optimizing enterprise-grade solutions.
Key Responsibilities
- Design, develop, and maintain complex applications using Core Java and Spring frameworks
- Apply advanced Object-Oriented Programming (OOPS) principles to deliver clean, modular, and reusable code
- Implement and optimize multithreaded applications for high-performance systems
- Work with SQL databases for efficient data modeling, query optimization, and integration
- Collaborate with cross-functional teams to gather requirements and translate them into technical solutions
- Conduct code reviews, troubleshoot issues, and ensure adherence to best practices
- Mentor junior developers and contribute to technical knowledge sharing within the team
- Ensure application scalability, performance tuning, and security compliance
Required Skills & Qualifications
- Bachelor’s/Master’s degree in Computer Science, Engineering, or related field
- 8+ years of professional experience in Java development
- Strong expertise in Core Java, OOPS, and Multithreading
- Hands-on experience with Spring concepts (Spring Core, Spring MVC, Spring Boot preferred)
- Proficiency in SQL and database design (MySQL, Oracle, PostgreSQL, etc.)
- Solid understanding of software development life cycle (SDLC) and Agile methodologies
- Strong analytical, problem-solving, and communication skills
🌟 Why Wissen?
Join a company that combines start-up agility with enterprise stability. Work alongside some of the brightest minds from institutions like MIT, Wharton, IITs, IIMs, and NITs. Be part of mission-critical projects for Fortune 500 giants, and grow in a culture that invests in your future.
Opportunity :
We are looking for Backend Developers who are passionate about solving problems. We offer a result-driven, fun, and dynamic environment. So far, we've built a reasonably-sized, high-powered team and are always striving to be the best place to work we can be.
Our Tech Deck :
- Architecture
- Linux
- Docker
- HAProxy
- Nagios
- Munin
- Backend & Servers
- PHP
- MySql
- MongoDB
- Redis
- Memcached
- Frontend
- JavaScript
- jQuery
- Sass/Less
- GruntJs
- Bower
- NPM
- Repositories
- Git
- Collaboration
- Slack
- Evernote
- Google Drive
Your Part :
- You shall be part of our design and development team. You shall be assigned one or multiple modules, wherein you shall:
- Write backend code and APIs, maintain the database and cache.
- Rapidly develop next-generation scalable, flexible, and high-performance systems.
- Act as an intermediary for problems, with both technical and non-technical people.
- Collaborate with the team to prioritize projects and ensure on-time completion.
Preferred Qualification & Experience :
- Bachelor's Degree in Computer Science or equivalent experience/knowledge
- 5+ Years of hardcore development experience in one or more backend frameworks and languages like JavaScript (NodeJS, Express), PHP (and other languages and frameworks).
- Working knowledge of both Unix and Windows in a software development setting prefer strength in Unix (all flavors) environment.
- Strong HTTP fundamentals.
- Basic networking knowledge.
- Familiarity with relational database concepts and RDBMS systems such as MySQL etc.
- A solid understanding of REST principles, and experience writing backend code to change or design APIs.
- Worked on NoSQL databases like Memcache, Redis, MongoDB etc.
- Proficient understanding of code versioning tools, such as Git
Preferred Skills & Abilities :
- As a Developer:
- Write clean, manageable code and maintain proper documentation
- Continuously discover, evaluate, and implement new technologies and frameworks to maximise development efficiency
- Excellent command over Data Structures and Algorithms
- Familiarity with continuous integration
- Strong problem solving and analytical skills
- Knack for benchmarking and optimization
- Passion for quality and innovation
- An eye for detail
- As a team player
- Collaborate with cross-functional teams to define, design, and ship new features
- Ability to manage and drive small teams
- Ability to work independently in small teams
- Estimate timelines and deliver as per schedule
- Responsible and capable of meeting tight deadlines
- Thrive in a variable and demanding startup environment
- Collaborate with multiple disciplines like product, engineering, marketing, research and support, and enjoy working in a collaborative environment
- Understand technical and business needs and fulfil them
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Role and Responsibilities |
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Required Skills |
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- Discussing project aims with the development team.
- Designing and building web applications using CodeIgniter.
- Troubleshooting issues in the implementation and debug builds.
- Working with front-end and back-end developers on projects.
- Testing functionality for users and the backend.
- Ensuring that integrations run smoothly.
- Scaling projects based on client feedback.
- Recording and reporting on work done in Codeignitor/Laravel
- Maintaining web-based applications.
- Presenting work in meetings with management.
Desired Candidate Profile
- Experience working with PHP, performing unit testing, and managing APIs such as REST.
- A solid understanding of application design using Codeignitor/Laravel.
- Knowledge of database design and querying using SQL.
- Proficiency in HTML and JavaScript.
- Practical experience using the MVC architecture.
Your Day-to-Day Tasks Include:
Works in requirements like Engineering, Design, Development, and Deployment. All the tasks involves working with Java, SQL Server and Couchbase.
Build and monitor data pipelines that serve 100+ websites, 150M+ unique impressions daily. Write code that can handle 4x more scale than the given requirement.
Maintain uptime of multiple distributed web applications.
Build data pipelines to pull data from upstream partners like Google.
You Should Have:
Minimum 3 years of experience with Java.
Minimum 2 year of experience with any SQL database (MySql, MSSql, Oracle, DB2, Sybase). Minimum 3 years of experience with web development.
Experience with any NoSql database (MongoDb, Couchbase, CouchDb, DynamoDb). Experience of designing/implementing/maintaining scalable systems.
Experience with any cloud platform (AWS/Azure/GCP).
Good To Have:
Experience with BI and data reporting.
Experience with Elastic search.
Understanding of data warehousing.
Experience in Node.js.
Job requirements
- A strong engineer with excellent Ruby experience working with Ruby on Rails
- Experience with Node.js
- Experience with SQL/nosql databases(Postgresql, cassandra, MongoDB)
- Experience with REST services and API design
- Experience with building the system for scale
- Experience with version control systems (bitbucket, git etc.)
- Experience working with AWS
- Experience with docker/microservices will be an added advantage
- Knowledge of unit & integration testing
- Knowledge of agile development process, jira
- Strong knowledge of algorithms and Data structures
- Basic understanding of the HTTP protocol
- Demonstrated experience working on application development projects and test-driven development. Experience in writing high quality code
- Knowledge of blockchain technology, smart contracts and cryptocurrency will be an added advantage
- Experience in fintech domain will be another added advantage
- Bachelor’s degree in computer programming, computer science, or a related field.
- Fluency or understanding of specific languages, such as Java, PHP, or Python, and operating systems may be required.
- 3+ years of experience with Ruby On Rails.
- Strong Project & Time Management Skills, along with the ability to apply these skills while working independently, or as part of a team.
What is the role?
You will be focusing on development of all server-side logic, definition, and maintenance of the central database. With your expertise in Node.js and as a full stack developer you will be managing the interchange of data between the server and the users.
Key Responsibilities
- Design and develop SaaS-based applications based on microservices architecture
- Driving innovations in the platform constantly
- Estimate efforts, identify risks, devices and meets project schedules
- Mentors/coaches engineers and provide technical leadership
What are we looking for?
An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of it. We are open to promising candidates who are passionate about their work and are team players.
- BS/MS in Computer Science or equivalent.
- 3-6 years of strong design/development experience in building massively large-scale distributed internet systems and products
- Strong understanding of DevOps tasks, CI/CD
- Excellent communication and interpersonal skills
- Have keen eye to detail
- Displayed effectiveness in being a team player, have a proven track record of performance
- Enjoys working on challenging assignments and is result oriented
- Self-starter, self-motivated and work with minimal supervision
- Agile and display flexibility in swiftly adapting to change in work requirement
Strong proficiency in –
- JavaScript, Node.js and frameworks available for it
- Code versioning tools, such as Git
- NoSQL and RDBMS systems
- Push-pull systems like Kafka, Redis
- Data structures & algorithms skills
Good to have experience –
- Programming languages like Python, Golang, ReactJs
Be familiar with –
- Designing highly available solutions, fault-tolerant systems, microservices architecture, REST APIs for on-premises, cloud (Google Cloud Platform or Amazon Web Services or Microsoft Azure), or hybrid infrastructure.
- Modern container technologies such as Docker, Kubernetes
- Server-side templating languages such as Jade, EJS etc
- Open source software, frameworks, and broader cutting-edge technologies
Whom will you work with?
You will closely work with the engineering team and support the Product Team of Plum.
What can you look for?
A wholesome opportunity in a fast paced environment that will enable you to juggle between concepts, interact and share your ideas and have loads of learning while at work. This role will help you learn what and how ledgers work in a high volume traffic system. Will learn microservice for a high availability system. Work with a team of highly talented young professionals and enjoy the benefits of being at Xoxoday.
We are
A fast growing SaaS commerce company based in Bangalore with offices in Delhi, Mumbai, SF, Dubai, Singapore and Dublin. We have three products in our portfolio: Plum, Empuls and Compass. Xoxoday works with over 1000 global clients. We help our clients in engaging and motivating their employees, sales teams, channel partners or consumers for better business results.
Way forward
We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. We however assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status.































