
We are looking for a highly skilled Backend Developer with expertise in Core Java, Java 8, and Data Structures. The ideal candidate should have experience in Spring Boot, JPA/Hibernate, and Microservices architecture. If you are passionate about backend development and want to work in a dynamic environment, we’d love to hear from you!
Key Responsibilities:
- Develop and maintain backend applications using Core Java and Java 8.
- Design and implement RESTful and SOAP web services.
- Work with Spring Framework, Spring Boot, and JPA/Hibernate for backend development.
- Build and optimize microservices-based architectures.
- Manage databases such as PostgreSQL, MySQL, or Oracle.
- Collaborate with cross-functional teams to deliver high-quality software solutions.
- Write clean, efficient, and scalable code while following best practices.
Requirements:
✅ Strong hands-on experience in Java (Core Java, Java 8) and Data Structures.
✅ Proficiency in Spring, Spring Boot, JPA/Hibernate.
✅ Experience in developing and consuming RESTful & SOAP APIs.
✅ Knowledge of Microservices architecture and best practices.
✅ Database expertise in PostgreSQL, MySQL, or Oracle.
✅ Excellent verbal and written communication skills.
Nice to Have:
- Experience with Docker/Kubernetes.
- Knowledge of CI/CD pipelines and DevOps practices.
- Exposure to cloud platforms (AWS, GCP, or Azure).

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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.
Greetings from Wissen Technology!
We are hiring Java Developers for Mumbai location.
Exp - 4 - 8 years
Location - Mumbai (Goregaon) - Hybrid
Notice Period - immediate or serving notice period only
Interview Process - Initial rounds virtual + Final round F2F
Software Engineer/Senior Software Engineer/Lead Engineer-Java
· Experience in Core Java 5.0 and above, Data Structures, OOPS, Multithreading, Algorithms, Collections, Unix/Linux
· Possess good architectural knowledge and be aware of enterprise application design patterns.
· Should have the ability to analyse, design, develop and test complex, low-latency client-facing applications.
· Good development experience with RDBMS
· Good knowledge of multi-threading and high volume server side development
Basic working knowledge of Unix/Linux
· Excellent problem solving and coding skills in Java
· Strong interpersonal, communication and analytical skills.
· Should have the ability to express their design ideas and thoughts.
Job Brief-
· Understand product requirements and come up with solution approaches
· Build and enhance large scale domain centric applications
· Deploy high quality deliverables into production adhering to the security, compliance and SDLC guidelines
- Strong experience in core Java programming.
- Good experience in Spring and Hibernate
- Proficiency with JSF/third party JSF components framework
- Must have at least 2+ years exp. of Web application development with exp. in using any MVC framework
- Knowledge of OOP concepts, industry best practices, and design
- Professional, precise communication skills
- Work experience writing Unit tests
- Good understanding of web technology and enterprise-level applications
- Work experience in applying the best practices of Web Application development
- Working experience in an Agile team especially with SCRUM
- Good to have experience in JavaScript frameworks
- Good to have experience in JSON, HTML5, CSS and XML
Following Skills will be an added advantage
- Working experience of Prime-Faces
- Knowledge of Spring Web Flow
Behavioral Skill
- Should be self-motivated and a quick learner with a problem-solving mind-set
- Attention to detail and follow-through to achieve good quality and meet deadlines.
- Ability to work effectively in a team as well as in an individual environment
- Should have excellent written and verbal communication skills
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.
We are looking for a qualified team leader to manage our team and provide effective guidance. The lead should be an excellent coder with proficiency and a clear understanding of different aspects of a project. You will be responsible for
supervising, managing, and motivating team members regularly. As a team leader, you will be the contact point for all Interactions with the architect and the team, so You must possess excellent communication skills. You should also be able to act proactively to ensure smooth team operations and effective collaboration.
Who are we looking for?
• Bachelors / Masters in Computer Science or equivalent with at least 7-10 years of professional experience.
●Strong software design and architectural skills in object-oriented and functional programming styles.
• Java 8, Microservices using Spring boot, Spring Cloud, Docker, Kubernetes orchestrator.
• Experience in working with Spring Framework - Spring Boot, Spring REST, Spring Security, Spring Data JPA, OAuth2, hibernate.
• Experience in Reactjs or Angular.
• Experience in RabbitMQ
• Experience in Unit Testing Tools like Junit/TestNG
• Experience in working with SQL & NoSQL databases such as MySQL, Mongo DB.
• Knowledge of CI/CD architecture.
• Knowledge of tools like Jenkins, SonarQube, Maven, Gitlab
• Experience in cloud technologies.
• Team management using Scrum methodologies.
You demonstrate the ability to work in a fast-paced and hyper-growth environment where the requirements are
constantly changing.
• Solid understanding of design patterns, data structures, and advanced programming techniques.
● Must have experience leading a team of at least 8- 10 people.
• Nice to have Python 3.6+, Image and textual data processing technologies.
You will be part of a talented software team that works on mission critical applications. Candidates should be willing to increase his/her circle of competence by researching for solutions in handover mannual and online resources. Ability to work independently is highly appreciated.
Requirements :-
- Graduate in Computer Science, Engineering or a related subject.
- 2+ years proven hands-on Software Development experience in JAVA.
- Perseverent in solving coding problems.
- Understanding of concepts related to .xml and .xsd files like targetNamespace, schema, xml datatypes, linkbases, arcs etc.
- Strong knowledge and hands-on experience of Java OOPs concepts, inheritance, abstract classes, interfaces, generics, exception handling and multithreading.
Good to have :-
- Experience with XML parsers like SAX.
- Experience with JSON file processing libraries like GSON.
- Dependency and build management using Maven scripts.
- Familiarity with Tomcat deployment.
- Familiarity with Spring Boot.
- Familiarity with Git/SVN for version control.
Responsibilities :-
- Developing features for validation engine.
- Attending client queries and assisting the clients in product integration.
- Catchup with the XBRL domain asap.
- Debugging and fixing bugs in the codebase. Testing changes for impact using available test harnesses.
About IRIS:
IRIS Business Services Limited (IRIS), is India's only listed SaaS Company that provides technology solutions/services in the regulatory technology space in across 42 countries globally. We are a pioneer and provide XBRL/iXBRL solutions for compliance, data and analytics. We are a global company headquartered in Navi Mumbai, India with subsidiaries in USA, Singapore and Italy and an affiliate firm in the UAE.
We are a company where technology expertise and domain knowledge come together to create cutting edge compliance solutions covering data and content management and information dissemination for issuers/ enterprises, regulators, governments, institutional clients etc. Our deep hands-on expertise in the XBRL space has been built over 17 years.
We are members of XBRL International, XBRL US, XBRL Europe and XBRL South Africa. In each of these jurisdictions, we contribute significantly to the development and adoption of the standard. IRIS is an ISO 27001:2013 certified organization.
IRIS has a flat organization structure which facilitates growth, opportunities, direction-setting, decision making and ownership at various levels.
To read more about IRIS visit our website: http://www.irisbusiness.com/">www.irisbusiness.com
This role isn't limited to the software development or support, it involves less coding but more Consulting, Architectural designing/High Availability system designing, Solutioning, Migration, Optimization, customer handling, etc.
MongoDB is expanding our global team of consulting engineers and is building a new team to deliver remote consulting services to further our ongoing plans for worldwide growth!
MongoDB Professional Services works with customers of all shapes and sizes in all verticals, from tier-1 banks to small web startups, on a variety of interesting use cases from e-commerce platforms to trading systems to social media applications. Solve interesting problems, gain incredible cross-stack experience, work with the best and brightest people in the business, network with industry leaders, and see new places - all in a day’s work!
MongoDB consulting exists to support the development of our customers’ vision, accelerate customers’ time to value, and drive a multitude of customer adoption scenarios - from building new solutions to modernizing legacy applications or migrating to cloud. Our consulting solutions ensure that organizations get the best out of MongoDB.
Be one of the recognized experts in this rapidly growing field in a high-growth software company successfully challenging the status quo of the database industry.
Shift Timing
You will get an opportunity to work with Global customers (APAC, EMEA, and North America) So this would require you to work in monthly rotational shifts.
We will be providing Cab for the pick-up & Drop, (Night Shift Allowances will be given & Cab’s aren’t chargeable)
Candidate Profile
We are looking for candidates who have a **strong development background along with Systems Architecture experience and want to make their career in Consulting Engineering,** This role isn't limited to the software development or support, it involves less coding but more Consulting, Architectural designing/High Availability system designing, Solutioning, Migration, Optimization, customer handling, etc. The ideal candidate should be a highly technical individual, with strong problem-solving and communication skills, and comfortable working remotely to match customer time zones for our Atlas customers.
Our ideal candidate will have
* Excellent analytical, diagnostic skills, and problem-solving skills
* High motivation for a role that combines deep technical and customer-management dimensions
* Confidence speaking and presenting in a collaborative customer setting
* **5+ years of software development/consulting/support experience**, preferably in a number of distinct industries/verticals
* Familiarity with enterprise-scale software architectures, application development methodologies, and software deployment and operations
* Competence in at least one of the following languages (in no particular order): Java, C++, C#, Python, Node.js (JavaScript), Ruby, Perl, Scala, Go
* Experience with databases such as MongoDB, Oracle, MS SQL Server, PostgreSQL
* Familiarity with Linux diagnostics and tuning; Windows tuning knowledge is a plus
* Experience working with public cloud technologies specifically AWS, Azure & GCP
* Should be ready to and comfortable working in shifts to match the customer time zone/s during the working week
**Position Expectations**
* **As a core member of the MongoDB Professional Services team, you will Contribute to helping migrate customers from self-hosted MongoDB on-prem/cloud to Atlas**
* Contribute to customer implementations at any or all phases of the application lifecycle: portfolio assessment, application planning, and design, deployment architectures, development and build, integration and release configuration, system testing, production operations, application optimization, and best practices adoption
* Work as part of a wider delivery team comprising fellow consulting engineers, project managers, and account teams
* Cultivate your individual MongoDB reputation as a trusted advisor to guide MongoDB and our customers into the future
* Partner with Product and Engineering teams to influence the direction of the MongoDB product roadmap
**Success Measures**
**As a Consulting Engineer you will be successful in this role when you can execute the following**
Become a field expert in “everything MongoDB”
Communicate complex technical proposals simply and convincingly to a wide range of audiences
Gain a reputation as a trusted advisor with your clients, large and small
Ensure your client’s success with their MongoDB endeavors
Maintain the required level of billable utilization
Influence MongoDB product development by contributing experience from the field
Successfully communicate the product roadmap to external clients
Constantly work on improving yourself, our products and our team
Do you know, Why MongoDB is a fantastic place to work and build your career?
Disrupting a $64 Billion market
Top NoSQL database in the world
Largest Ecosystem and the fastest growing database in the world
Close to 17,000 customers in over 100 countries and over 90+ million downloads
120% net ARR expansion rate over each of the last twenty quarters
Sequoia Capital and a number of other Top VC firms have invested in MongoDB. Sequoia Capital calls us out as one of their flagship portfolios; Sequoia has also invested in Apple, Google, Youtube, and WhatsApp
9-figure revenue company, with very high double-digit growth rates
Be a part of the company that’s reinventing the database, focused on innovation and speed
Enjoy a fun, inspiring culture that is engineering focused
Work with talented people around the globe
Learn, contribute, and make an impact on the product and community
**Life at MongoDB**
**Our India office culture**
180+ people, with teams in Sales, Engineering, HR, Finance, IT & Marketing
Regular group outings and opportunities to get to know your colleagues
Employee affinity groups
Our Benefits
**Competitive salary and EQUITY**
Comprehensive Health cover, dental cover, travel insurance & Life Insurance.
Free lunch twice per week and a fully stocked kitchen with healthy and sweet treats
Macbooks are company standard
**26 weeks Maternity & 20 Paternity leave** to spend time with new arrivals
*MongoDB is an equal opportunities employer*
Responsibilities / Requirements:
● Be hands-on implicated in the design and implementation of NestJs REST APIs.
● Work with DevOps engineers to scale and optimise NestJs micro-services.
● Must have an excellent understanding of how the web works.
● Extensive knowledge of OOP, Design Patterns, and SOLID Principles.
● Familiar with modern engineering practices: coding standards, code reviews, continuous deployment, automated testing.
● Must be willing to constantly learn new things.
● Knowledge of algorithms and data structures.
Technologies:- • Nestjs • TypeScript 3. MySQL • Docker • Kafka
Knowledge of NestJS would be preferable.
- 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.
- 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.







