Java Developer

Role Summary 

We have an existing Android-based POS application that needs to be migrated and rebuilt as a Windows desktop application using WPF. You will re-architect the Android app's features, UI flows, and business logic into a full-featured WPF application with SQLite local storage, EF Core, and existing REST API integration. 

Responsibilities 

• Analyze the existing Android POS app and re-architect it as a WPF desktop application. 
• Rebuild all screens and workflows (billing, cart, product catalog, orders, reports) in WPF / XAML following MVVM pattern. 
• Implement local data storage using SQLite + Entity Framework Core (Code First, migrations). 
• Integrate with the existing backend REST APIs (same APIs used by Android app) for product sync, orders, payments, and authentication. 
• Ensure feature parity between Android and Windows versions. 
• Integrate Windows-specific hardware — barcode scanners, receipt printers, cash drawers. 
• Apply Dependency Injection, async/await, and SOLID principles throughout. 

Required Skills 

• WPF, XAML, MVVM, C# (.NET 6/8),
• Entity Framework Core + SQLite 
• REST API consumption (HttpClient, JWT auth, JSON handling) 
• Ability to read and understand Android (Java/Kotlin) code and translate logic to C# 
• Git, Visual Studio 

Good to Have 

• Prior Android-to-Windows or mobile-to-desktop migration experience 
• Payment gateway integration (Razorpay / Stripe / Paytm) 
• PDF / receipt generation (RDLC / FastReport) 
• POS, billing, or retail domain experience 

AI-Assisted Development (Mandatory Mindset) 

We expect the candidate to actively leverage AI tools to accelerate the migration and development process: 

• Use GitHub Copilot / Cursor / Claude to convert Android (Java/Kotlin) logic to C# WPF code efficiently. 
• Use AI tools for boilerplate generation — ViewModels, EF Core models, API service classes, XAML layouts. 
• Leverage AI for code review, refactoring suggestions, and identifying platform-specific differences (Android vs Windows). 
• Use AI-assisted documentation and inline commenting to maintain code clarity during migration. 
• Comfortable evaluating, validating, and refining AI-generated code — not just accepting output blindly. 

Qualification 

• B.E. / B.Tech / MCA in Computer Science
• 2–4 years WPF desktop development experience

Regards,

HR Team,

OnePOS Retail Solutions Private Limited

• Design, build and maintain efficient, reusable, and reliable Java code. 
• Providing technical oversight to the team, involved in design and code review.
• You would also be spending most of the time in development activities in varied technologies and should have a passion to write code.
• Should be able to create good technical documents.
• Translate application storyboards and use cases into functional applications.
• Ensure the best possible performance, quality, and responsiveness of the applications.
• Identify bottlenecks and bugs, and devise solutions to these problems - Help maintain code quality, organization, and automatization. 
• Prepare the technical design of complex technology components as well as suggest the pros and cons of using a certain technology stack or component or design pattern versus another, to the clients.
• Team Management.

• Qualifications: BTECH/MTECH/MCA/MSc.
• Proficient in Java, with a good knowledge of its ecosystems with a knack for writing clean, readable Java code, writing reusable Java libraries along with knowledge of multithreading, concurrency patterns, and collections in Java. 
• Solid understanding of object-oriented programming along with various design and architectural patterns.
• Hands on experience with JMS, JPA, Spring (MVC, Boot & Cloud preferred) & Hibernate.
• Familiarity with concepts of MVC, JDBC, and RESTful.  Experience with Presentation Layer (JSP/Servlets), JS Frameworks (Angular, jQuery, react, etc.).
• Creating database schemas that represent and support business processes and experience with both external and embedded databases. Implementing automated testing platforms and unit tests.
• Proficient understanding of code versioning tools, such as Git, Ant, Maven, and Gradle; continuous integration.
• Knowledge in xml based mappings, SAML, rest clients, CAS authentication and Jetty.
• Knowledge of Apache Camel and Kafka and Drools Rule Engine is preferred.

Striim (pronounced “stream” with two i’s for integration and intelligence) was founded in 2012 with a simple goal of helping companies make data useful the instant it’s born.

Striim’s enterprise-grade, streaming integration with intelligence platform makes it easy to build continuous, streaming data pipelines – including change data capture (CDC) – to power real-time cloud integration, log correlation, edge processing, and streaming analytics.

Strong Core Java / C++ experience

·       Excellent understanding of Logical ,Object-oriented design patterns, algorithms and data structures.

·       Sound knowledge of application access methods including authentication mechanisms, API quota limits, as well as different endpoint REST, Java etc

·       Strong exp in databases - not just a SQL Programmer but with knowledge of DB internals

·       Sound knowledge of Cloud database available as service is plus (RDS, CloudSQL, Google BigQuery, Snowflake )

·       Experience working in any cloud environment and microservices based architecture utilizing GCP, Kubernetes, Docker, CircleCI, Azure or similar technologies

·       Experience in Application verticals such as ERP, CRM, Sales with applications such as Salesforce, Workday, SAP  < Not Mandatory - added advantage >

·       Experience in building distributed systems  < Not Mandatory - added advantage >

·       Expertise on Data warehouse < Not Mandatory - added advantage >

·       Exp in developing & delivering product as SaaS i< Not Mandatory - added advantage 

JOB DESCRIPTION:

 Roles and Responsibility :

• Lead and build the team in development
• Participate in the technical design of projects we made for our Clients
• Supervise and write efficient and reliable code; use best practices with our team
• Organize and participate code reviews
• Setup unit and integration tests
• Architecture and design of reusable server components
• Developing high performing REST APIs for application functionality
• Develop and maintain scalable server architecture serving millions of users every day.
•  

Must Have Skill Sets :

• Should have 5+ years of experience in Mobile/web server and application development
• Mandatory: Strong development skills in Python ,Node.js, Typescript, Django Rest Framework, Linux, MongoDB
• Experience with client technologies like JavaScript, CSS3, HTML5, bootstrap, Angulars, React, Android App a plus
• Strong knowledge of data structures and computer fundamentals
• An ability to refract and understand large and separate code bases
• Experience with third-party libraries and APIs
• Forward-looking on potential technology choices
• Experience in building highly scalable, reliable systems
• Team handling experience.
  
  
  

• 2+ years of experience on Java, Spring Boot, Hibernate in medium to large-scale projects
• Must have experience with at least some flavours of both SQL (MySQL, Postgres) and NoSQL (Kafka, MongoDB, ElasticSearch, NoSQL distributed cache system, DynamoDB etc), datastores in production
• Must have experience with Kafka or similar message queue systems in production
• Stellar problem solving skills
• Hunger to learn new things and ability to grasp new concepts quickly
• Ability to move quickly without breaking things too much (we are dreamers)
• Ability to work under immense pressure which is balanced by a sense of responsibility and ownership
• Should be able to groom juniors and take them to the next level

Aakash Educational Services Limited (AESL) is a leading educational institution in India that provides comprehensive test preparatory services for students preparing for medical and engineering entrance examinations, school/board exams and competitive and scholarship exams such as NTSE, KVPY, and Olympiads.  The “Aakash” brand is associated with quality test preparation and a proven student selection track record in various medical and engineering entrance examinations

• Building and supporting backend and frontend development of websites and application projects
• Producing appropriate and effective technical solutions
• Working with a wider, distributed technology and project management teams to meet deadlines and maintain a high standard of code quality
• Understanding, defining, and communicating functional and non-functional requirements
• Working with our technical directors and project managers to define, scope, and estimate projects and features
• Working with QA teams to address bugs and ensure our work output is of the best quality

• Excellent written and verbal English communication
• Full exposure to both backend and frontend development on Drupal platforms
• A strong and demonstrable background working with Drupal, especially 8/9
• Experience building custom integrations, services, and modules within Drupal as well as integrating with APIs
• Strong in Data Structure and Algorithm
• Experience with Drupal templating using HTML5, CSS (SCSS is a bonus), and JavaScript and also the Twig templating engine
• Competent with MySQL and optimising query and table performance within a Drupal platform
• Working with cloud platforms like AWS
• BE/B.Tech/MCA with 4+ years of experience in Drupal implementation
• Strong experience in CI/CD processes (Jenkins, pipelines etc.)
• Should have a good understanding of OOPs concept and Design Patterns like
• Good Understanding of workflows