
Experience: 3 to 5
Location: Bangalore
Wissen Technology is now hiring for a Senior 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. - 3 to 5 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 Us:
At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide.
Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality.
We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more.
Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Whether it’s AI/ML for unstructured data processing, cloud enablement, or data engineering, Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our proprietary Interview Ninja platform ensures we hire the best, building high-performing teams that deliver unmatched results.
Today, Wissen Technology has a global footprint with 2200+ employees across offices in the US, UK, UAE, India, and Australia. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.
Website : www.wissen.com

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer 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.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
Connect with the team
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a deep interest in scalable, low-latency systems.
Key Responsibilities
• Develop, maintain, and optimize backend applications using Python.
• Build and integrate RESTful APIs and microservices.
• Work with relational and NoSQL databases for data storage, retrieval, and optimization.
• Write clean, efficient, and reusable code while following best practices.
• Collaborate with cross-functional teams (frontend, QA, DevOps) to deliver high quality features.
• Participate in code reviews to maintain high coding standards.
• Troubleshoot, debug, and upgrade existing applications.
• Ensure application security, performance, and scalability.
Required Skills & Qualifications:
• 2–4 years of hands-on experience in Python development.
• Strong command over Python frameworks such as Django, Flask, or FastAPI.
• Solid understanding of Object-Oriented Programming (OOP) principles.
• Experience working with databases such as PostgreSQL, MySQL, or MongoDB.
• Proficiency in writing and consuming REST APIs.
• Familiarity with Git and version control workflows.
• Experience with unit testing and frameworks like PyTest or Unittest.
• Knowledge of containerization (Docker) is a plus.
Strong Senior Backend Engineer profiles
Mandatory (Experience 1) – Must have 5+ years of hands-on Backend Engineering experience building scalable, production-grade systems
Mandatory (Experience 2) – Must have strong backend development experience using one or more frameworks (FastAPI / Django (Python), Spring (Java), Express (Node.js).
Mandatory (Experience 3) – Must have deep understanding of relevant libraries, tools, and best practices within the chosen backend framework
Mandatory (Experience 4) – Must have strong experience with databases, including SQL and NoSQL, along with efficient data modeling and performance optimization
Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs, services, and backend systems, including system design and clean code practices
Mandatory (Domain) – Experience with financial systems, billing platforms, or fintech applications is highly preferred (fintech background is a strong plus)
Mandatory (Company) – Must have worked in product companies / startups, preferably Series A to Series D
Mandatory (Education) – Candidates from Tier - 1 engineering institutes (IITs, BITS, are highly preferred)
Integration Developer
Job Description
Roles and Responsibilities
- Design, Code, test, debug, implement and document complex WSO2 sequences.
- Monitoring and logging tool stacks - Splunk/ELK/Prometheus, Grafana 4 Design, Code, test, debug, implement and document complex WSO2 sequences.
- Perform Build activities for WSO2 ESB Middleware integration, involves writing XSLT, ESB coding, configuration, and Analysis activities.
- Trouble shooting various problems in different stages of development using logs files, Traces and Log Analyzer.
- Responsible for understanding the requirement, solution design, coordinate the development and testing activities (end to end)
- Guide the team regarding WSO2 platform best practices, framework, reusable artefacts and ensure code quality and timely deliverables.
- Work with functional and technical customers to determine solutions that drive additional business value.
- Work with Github, Azure Devops and CI tools to automate dev, build, deployment and testing.
- Good knowledge in messaging brokers: WSO2 Message Broker, Apache Kafka.
- Monitoring the server (Monitoring logs and WSO2 metrics).
- Desired Candidate Profile
Desired Candidate Profile
- Candidate must have minimum 2+ years of hands-on experience in WSO2, preferably with WSO2 certification.
- Extensive experience in Integration by using WSO2 Product Stack (API Manager 2.6/3.x, Enterprise Integrator 6.5 and Identity Server 5.7.0)
- Experience in Implementing APIs in WSO2 EI and On-boarding APIs into WSO2 API Manager
- Experience in WSO2 API Manager for designing API facades and designing and implementing API Proxies.
- Hands-on experience in designing and developing high volume web services using API Protocols and Data Formats (REST, JSON, SOAP & XML).
- Must have hands on experience / knowledge with CI tools to automate dev, build, deploy.
- Experience in programming languages: Java, JavaScript, Python
- Experience in on boarding web applications into WSO2 Identity Server for authentication and authorizatio
Qualifications
- Minimum of a Bachelor's or Master’s degree in Computer Science, or a related four-year degree.
- 4 years of hands on experience in Integration
You will be working hands-on on a complex and compound product that has the potential to be used by millions of sales and marketing people around the world. Your contribution to delivering an excellent product platform that:
- enables quick iteration
- supports product customization
- and handles scale
What do we expect you to have?
- 2+ years of experience in backend engineering
- An intent to learn and an urge to build a product by learning different technologies
- Interest in writing complex, scalable, and maintainable backend applications
- Tech stack requirements:
Must haves
- Experience in building application server in Java (Spring / Spring boot) / NodeJS / Golang / Python
- Experience in using SQL databases and designing schemas based on application need
- Experience with container services and runtimes (docker / docker-compose / k8s)
- Experience with cloud paas (AWS / GCP / Azure cloud)
- Experience and familiarity with microservices’ concepts
- Experience with bash scripting
Good to have (Preferred)
- Preferred experience with org wide message queue (rabbitmq / aws sqs)
- Preferred experience with task orchestration services (apache airflow / aws step function)
- Preferred experience with infra as code (or system configuration) tools (terraform / chef / ansible)
- Preferred experience with build essential tools (make / makefile)
- Preferred experience with monitoring and tracing systems for performance / system / application monitoring (grafana + loki + prometheus / aws cloudwatch)
What will you learn?
- Building highly available, complex, compound, performant systems of microservices platform that acts as an API layer
- Industry-standard state-of-the-art tools + methodologies + frameworks + infra for building a product.
- Fable is not a trivial CRUD app. It requires a lot of consideration and care for building the API layer as the product is highly customizable per user.
- How different functions (sales, marketing, product, engineering) in a high-velocity product company work in synergy to deliver an iterative product in real life.
Who would you be working with?
- You would be directly working with the co-founder & CTO who has built multiple companies before and has built large teams in large-scale companies like ThoughtSpot, Unacademy, etc.
Position details
- Fully remote.
- 5 days/week (all public and government holidays will be non-working days).
- No specific work hours (we will sync over zoom over the course of the day).
Java, Java8, Springboot, Microservices, core java, j2ee, JAVA, Springboot
backend, core java, java8, micro services
- Experience level of 6 to 9 years of experience in very large-scale applications.
- Strong problem-solving skills, computer science fundamentals, data structures and
- algorithms their space & time complexities
- Design (LLD & HLD) and architect technical solutions for the business problems of a very large-scale portal.
- Strong hands-on and practical working experience with Java as the programming language
- Strong debugging skills - Code, Logs, DB, JVM
- Excellent coding skills - should be able to convert design into code fluently.
- Hands-on experience working with Databases and Linux platform
About Clari
Clari uses AI and automation to drive growth and retention for high-performing revenue teams. Clari’s Revenue Operations platform is currently processing over $300 billion in pipeline, and is used by over 50,000 marketing, sales and customer success professionals across 170 countries. Customers include market leaders like Symantec, Adobe, Alteryx, Workday, Lenovo, Zoom, Medallia, Alteryx and hundreds of others. Clari harvests and analyzes activity signals from dozens of different business systems, including email, calendar, CRM, marketing automation, to shorten sales cycles, increase win rates, and make revenue more predictable.
The result is passionate and frankly humbling customer loyalty. We consistently hear from our customers how we’ve changed their lives - just check out the reviews on https://www.g2crowd.com/products/clari/reviews">G2 Crowd. It never gets old, and we never take it for granted.
Clari is looking for several key experienced engineering who will focus on implementing many different areas of our solution, including but not limited to our overall web architecture, core application features such as data science driven analytics, user management, content management, social graph integration, personalization, emails, collaboration systems and enterprise content repositories as well as on unstructured data analytics, machine learning and our relevance engine.
Join our core applications team where you’ll work with truly remarkable colleagues on highly diverse, complex, and relevant problems while building scalable applications designed to service millions of mobile and web-based information workers. You’ll work closely with product managers, designers, and others in a cross functional environment on multiple projects, from concept phase through testing, launch and ongoing operations.
We work in an open, collaborative environment and seek exceptional developers who enjoy problem solving and straying outside the routine. You will also contribute to the growth of Clari by being a Brand Ambassador and assist in the hiring of great talent.
Qualifications
- 3+ years of professional server development experience using Java or similar object-oriented language
- Strong understanding of web-based architecture - web servers, load balancing, caching, databases etc.
- Basic knowledge of SQL (Postgres, MySQL) and NoSQL databases (MongoDB)
- Experience developing data driven web applications
- Up-to-date knowledge of latest trends in web application development, including Amazon AWS ecosystem
- Experience building and using RESTful APIs
Nice to Have
- Experience with multi-threading, replication etc. concepts in cloud applications
- Familiarity with large scale business intelligence applications
- Familiarity of JavaScript and other web technologies such as React
Why Clari?
Because we have a big mission, a winning product and an amazing fan base of passionate customers.
We’re changing the world and having a lot of fun on the way. Clari is a fun and fast-growing Silicon Valley company. Clari is one of Inc. Magazine’s best places to work in the US and was named as a 2019 Top Bay Area Workplace for the 5th consecutive year. In October 2019, we closed $60M in Series D funding and are growing at 200%. Our product is a winner - we have perennially been given the highest overall rating in G2 Crowd’s Top 20 Sales Analytics Software. We’re backed by top tier investors including Sequoia Capital, Bain Capital, Sapphire Ventures, Madrona Venture Group and Tenaya Capital, and have a superb and supportive board.
Our team is made up of veteran entrepreneurs, brilliant engineers, and tried-and-true sales professionals who have done this before and want to do it again, this time only bigger.
What’s left to add? You.







