
- Interacting with and performance tuning multi-tiered application systems.
- Technically leading complex store system projects including estimating requirements, designing systems, and helping develop solutions.
- Being adaptive to the use of new software and programming techniques as they are required or adapted in IT.
- Acquiring and maintaining additional technical skills for professional development.
- Developing software solutions to meet customer needs.
- Creating and implementing the source code of new applications.
- Testing source code and debugging code.
- Evaluating existing applications and performing updates and modifications.
- Developing technical handbooks to represent the design and code of new applications.
- Being responsible for working with all levels of the business and the development team to establish, promote, and enforce architectural guidelines as well as assisting in the implementation and problem resolution of existing applications and requests.
- Ensuring work meets functionality and quality expectations within given timelines.
What you need to have:
- Experience in application development utilizing JAVA, Spring, SQL, Log4j, IOS, Web Services, JavaScript, and Oracle databases.
- Strong Knowledge of EMV/ NFC Standards
- POS development experience required
- Thorough knowledge of financial institutions, payment processing flows especially electronic payments, and the financial networks for processing.
- Must be able to command the attention and respect of highly technical associates.
- Demonstrated track record of successful system and project implementations.
- Excellent organization skills and attention to detail, including the ability to prioritize and manage a variety of complex projects and activities.
- Strong problem solving, analysis, design, and testing skills.

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Job Title: Senior Java Developer
Location: Mumbai (On-site)
Notice Period: Immediate Joiners Preferred / 15 Days or Less
Job Description:
We are seeking a highly skilled and experienced Senior Java Developer with 5+ years of hands-on experience in Java-based application development. The ideal candidate should be adept at designing scalable systems, optimizing performance, and leading development efforts in collaboration with cross-functional teams. This is a full-time, on-site position for candidates currently residing in Mumbai and available to join within 15 days.
Key Responsibilities:
- Lead end-to-end design, development, and deployment of Java applications
- Translate functional and technical requirements into detailed design
- Build scalable, secure, and high-performing applications
- Develop and consume RESTful APIs and ensure seamless integration
- Implement microservices architecture and containerized deployments
- Write clean, efficient, and well-documented code
- Perform code reviews, debugging, and performance tuning
- Collaborate with DevOps for CI/CD and production deployments
- Guide junior developers and conduct knowledge-sharing sessions
- Stay updated on new technologies and industry trends
Required Technical Skills:
- Languages & Frameworks:
- Core Java, J2EE
- Spring Framework (Spring Boot, Spring MVC, Spring Security)
- Hibernate / JPA
- Apache Maven / Gradle
- API Development & Integration:
- RESTful APIs, JSON, Swagger/OpenAPI
- Databases:
- MySQL, PostgreSQL, Oracle
- MongoDB, Redis (preferred)
- Frontend Exposure (Optional but Preferred):
- HTML, CSS, JavaScript, jQuery
- Angular / React
- Tools & Platforms:
- Git, GitHub / GitLab / Bitbucket
- Jenkins, Docker, Kubernetes (basic knowledge)
- SonarQube, Log4j, ELK stack (preferred)
- Cloud & DevOps (Good to Have):
- AWS (EC2, S3, Lambda, RDS), Azure or GCP
- CI/CD pipeline setup
- Architecture & Patterns:
- Microservices, MVC, Design Patterns
- Event-driven architecture (Kafka/RabbitMQ is a plus)
- Testing:
- JUnit, Mockito
- Postman, REST Assured
Soft Skills:
- Excellent problem-solving and debugging skills
- Strong communication and collaboration abilities
- Ability to lead and mentor a team
- Time management and task prioritization
- Adaptable and quick learner
Qualifications:
- Bachelor’s/Master’s degree in Computer Science, Engineering, or related field
- 5+ years of relevant software development experience
- Relevant certifications (Oracle Java, AWS, PMP) are a plus
Eligibility Criteria:
- Must be currently residing in Mumbai
- Must be able to join within 15 days or less
- Immediate joiners preferred
Python Backend Developer (5+ years experience)
We are seeking an experienced Python Backend Developer with at least 5 years of hands-on experience in Python and Django development. The ideal candidate will have a strong background in MySQL and MongoDB databases, as well as knowledge of HTML, CSS, JavaScript frameworks, and cloud technologies like AWS, Azure or Google Cloud.Key Responsibilities:
- Design and develop scalable, high-performance Python applications using the Django framework
- Write clean, maintainable, and well-documented code
- Optimize database queries and schema design for improved performance
- Integrate applications with various APIs and third-party services
- Collaborate with cross-functional teams to gather requirements and deliver solutions
- Participate in code reviews, testing, and deployment processes
- Continuously learn and stay updated with the latest technologies and best practices
Required Skills and Experience:
- Bachelor's or Master's degree in Computer Science, Information Technology or a related field
- 5+ years of professional experience in Python and Django development
- Proficient in MySQL and MongoDB databases, with the ability to write complex queries and optimize database performance
- Hands-on experience with HTML, CSS, and at least one JavaScript framework (e.g., React, Angular, Vue.js)
- Knowledge of cloud technologies like AWS, Azure, or Google Cloud is preferred
- Strong problem-solving and algorithmic skills
- Excellent communication and teamwork skills
- Passion for continuous learning and innovation
Preferred Qualifications:
- Experience in developing and deploying applications on cloud platforms
- Knowledge of containerization technologies like Docker and Kubernetes added advantages
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 to 10 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 Wissen Technology:
Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in-class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals.
Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always first time right.
Our team consists of 1200+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.
Wissen Technology offers 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.
We have been certified as a Great Place to Work for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.
ROLES AND RESPONSIBILITIES
• Lead the Software Team. Ensure consistent deliveries of planned features while ensuring code quality, testing standards, and processes are maintained.
• Work with the leadership team to cultivate and grow the Internal Software Team Culture at
• Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth
• Ensure application performance, uptime, and scale, maintaining high standards of code quality and thoughtful application design.
• Solve technical problems of high scope and complexity.
• Exert influence on the overall objectives and long-range goals of your team.
• Experience with performance and optimization problems, particularly at a large scale, and a demonstrated ability to both diagnose and prevent these problems.
• Help to define and improve our internal standards for style, maintainability, and best practices for a high-scale web environment. Maintain and advocate for these standards through code review.
CANDIDATES MUST HAVE
• Experienced in designing and integrating RESTful APIs
• Knowledge of Python
• Excellent debugging and optimization skills
DESIRED SKILLS & EXPERIENCE
• 3-5 years of experience building large-scale software applications and working with large software teams.
• Bachelor’s degree in computer science, information technology, or engineering • Experience designing and integrating RESTful APIs
• Knowledge of Python and Backend Development
• Experience building Web/Mobile applications
• Excellent debugging and optimization skills
• Unit and Integration testing experience
• Being knowledgeable about engineering processes and good practices
• Passionate about learning new tools. Ability to continuously learn and acquire knowledge.
• Able to adapt to changing complexity of tasks.
ThoughtWorks is a global software consultancy with an aim to create a positive impact on the world through technology. Our community of technologists thinks disruptively to deliver pragmatic solutions for our clients' most complex challenges. We are curious minds who come together as collaborative and inclusive teams to push boundaries, free to be ourselves and make our mark in tech.
Our developers have been contributing code to major organizations and open source projects for over 25 years. They’ve also been writing books, speaking at conferences and helping push software development forward, changing companies and even industries along the way. We passionately believe that software quality is driven by open communication, review and collaboration. That’s why we’re such vehement supporters of open source and have made significant contributions to open source tools for testing, continuous delivery (GoCD), continuous integration (CruiseControl), machine learning and healthcare.
As consultants, we https://www.thoughtworks.com/careers/hub/consultant-life">work with our clients to ensure we’re evolving their technology and empowering adaptive mindsets to meet their business goals. You could influence the digital strategy of a retail giant, build a bold new mobile application for a bank or redesign platforms using event sourcing and intelligent data pipelines. You will use the latest Lean and Agile thinking, create pragmatic solutions to solve mission-critical problems and challenge yourself every day.
You’ll spend time on the following:
- You will champion best practices like writing clean and reusable code using practices like TDD, SOLID principles, OO design, and pair programming
- You will partner with other technologists from cross-functional teams advocating devops culture
- You will work in collaborative, product-focused teams to build innovative customer experiences
- Take ownership and accountability beyond individual deliverables, always pushing the envelope in order to deliver awesome results for our clients
- Learn, digest and subsequently apply the latest technology thinking from ourhttps://www.thoughtworks.com/radar"> tech radar to solve client problems
Here’s what we’re looking for:
- You have 2+ years* of experience using two or more development languages (Java, JavaScript, Ruby, C#, etc.) with experience in Object-Oriented programming
- You’re willing and able to commit to traveling up to 100% (back home on the weekends) across the US and Canada to help our clients solve their business problems
- You can write clean, high-quality code in a variety of languages and are also able to spot (and improve) bad code
- You’re resilient in ambiguous situations and can approach challenges from multiple perspectives
- You have experience with Agile, Lean and/or Continuous Delivery approaches such as Continuous Integration, TDD, Infrastructure as Code, etc.
- Bonus points if you have knowledge of cloud technology such as AWS, Docker or Kubernetes
- You’re willing and able to commit to travel to client sites in order to solve their business problems
we are looking to add new talent to our ruby on rails team. You will be responsible for developing and maintaining the server-side logic for the central database, testing performance, troubleshooting, and integrating front-end elements into the application.
Job specifications-
- Bachelor’s degree in computer science, computer engineering, or related field.
- Understanding of ruby on rails as well as libraries
- Ability to write clear, readable ruby codes.
- Problem-solving capabilities.
- Understanding of code versioning tools like- Git
- Good understanding of front-end technologies including- HTML5, JavaScript, and CSS3.
- Familiarity with MVC, Mocking, RESTful, and ORM.
- Familiarity with testing tools.
About Dunzo
Not that long ago, we were on whatsapp with a handful of customers, many of whom were friends and family, getting you anything you needed - groceries, food, even sending packages to anywhere in Bangalore. Today, we’re an app covering Bangalore, Pune and Gurgaon, Hyderabad and Delhi. Dunzo is a technology company, that makes local deliveries fast and easy - whether it’s that quick run from your local store, or getting you that book that is available only in one store far away from you or even organizing your entire party!
We were recently voted #3 on LinkedIn’s Top Startups in India and here’s why. The Dunzo team gets an on ground opportunity to shape a product for users across cities. You are shaping cities you’ve grown up in - by making them more accessible than before through the use of technology. We’re solving an extremely tough problem, and we seek the best of minds who are great at problem-solving, passionate and willing to go the extra mile!
About The Team
As a team, we believe that the best idea wins - no matter where the idea comes from. We tackle problems that have existed for years - through technology and data. You'll be joining a vibrant, young team who are passionate about giving our users time back, provide flexible earning opportunities for our Partners and enhance local businesses.
Job Description
Must Haves :
- Proficient in algorithms and data structures.
- Having strong experience in designing data intensive and scalable systems.
- Comfortable with microservices based architecture.
- Knowledge of software engineering processes and unit testing.
- Past experience of mentoring a team of at least two people.
- Prior experience with both relational and non-relational databases.
- Prior experience with caching.
- Ability to debug and hotfix a problem with production in a swift amount of time.
- Communication skills.
Please let me know if you are interested.
- 4+ years Rails experience in a production environment working complex Ruby on Rails applications and Ruby gems
- Proficient understanding of code versioning tools
- Knack for writing clean, readable Ruby code
- Knowledge on HTTP and RESTFUL API development experience
- Experience in Angular is a plus
- Proactiveness, good communication and fast learning.










