Senior Java Developer

We're looking for a high-energy Java engineer to design and implement scalable microservices using Spring Boot. You'll collaborate across teams to deliver clean, efficient, and high-performance backend services.

🛠️ Key Responsibilities

• Design, develop, and maintain RESTful services and microservices using Spring Boot
• Utilize OOP, Java Collections, Exception Handling, and method overloading/overriding in modern coding practices
• Build and optimize multithreaded systems (Threads, synchronization, wait(), notify(), yield()) for performance and scalability
• Write unit and integration tests (JUnit, Mockito, Spring Test) to ensure code quality
• Collaborate with cross-functional teams (QA, DevOps, Product) through code reviews and feature planning
• Diagnose and resolve performance bottlenecksJVM tuning, SQL/caching optimizations
• Adhere to coding standards, best practices, and participate in peer code review

🎯 Required Skills & Experience

• Strong Java fundamentals: OOP, Collections, Generics, Exception Handling
• Concurrency mastery: multithreading, synchronization primitives (wait(), notify(), yield())
• Spring Boot: solid experience building, testing, deploying REST APIs
• Microservices: design, inter-service communication, stateless service patterns
• Testing frameworks: JUnit, Mockito, Spring Test
• Performance tuning: profiling, optimization with JVM settings and database queries
• Tools & practices: Git, Maven/Gradle, CI/CD pipelines, Docker/Kubernetes (plus)
• Soft skills: strong problem-solving, collaboration, and effective communication

Backend - Software Development Engineer II

Experience - 4+ yrs 

About Wekan Enterprise Solutions

Wekan Enterprise Solutions is a leading Technology Consulting company and a strategic investment partner of MongoDB. We help companies drive innovation in the cloud by adopting modern technology solutions that help them achieve their performance and availability requirements. With strong capabilities around Mobile, IOT and Cloud environments, we have an extensive track record helping Fortune 500 companies modernize their most critical legacy and on-premise applications, migrating them to the cloud and leveraging the most cutting-edge technologies.

Job Description

We are looking for passionate software engineers eager to be a part of our growth journey. The right candidate needs to be interested in working in high-paced and challenging environments. Interested in constantly upskilling, learning new technologies and expanding their domain knowledge to new industries. This candidate needs to be a team player and should be looking to help build a culture of excellence. Do you have what it takes?

You will be working on complex data migrations, modernizing legacy applications and building new applications on the cloud for large enterprise and/or growth stage startups. You will have the opportunity to contribute directly into mission critical projects directly interacting with business stakeholders, customer’s technical teams and MongoDB solutions Architects.

Location - Bangalore

Basic qualifications:

• Good problem solving skills
• Deep understanding of software development life cycle
• Excellent verbal and written communication skills
• Strong focus on quality of work delivered
• Relevant experience of 4+ years building high-performance backend applications with, at least 2 or more projects implemented using the required technologies

Required Technical Skills:

• Extensive hands-on experience building high-performance web back-ends using Node.Js. Having 3+ hands-on experience in Node.JS and Javascript/Typescript and minimum
• Hands-on project experience with Nest.Js
• Strong experience with Express.Js framework
• Hands-on experience in data modeling and schema design in MongoDB 
• Experience integrating with any 3rd party services such as cloud SDKs, payments, push notifications, authentication etc…
• Exposure into unit testing with frameworks such as Mocha, Chai, Jest or others
• Strong experience writing and maintaining clear documentation

Good to have skills:

• Experience working with common services in any of the major cloud providers - AWS or GCP or Azure
• Experience with microservice architecture
• Experience working with other Relational and NoSQL Databases
• Experience with technologies such as Kafka and Redis
• Technical certifications in AWS / Azure / GCP / MongoDB or other relevant technologies

About - The company is an online discovery platform that offers direct-to-home product trials for D2C brands.

Location- Bangalore

Series- B

Responsibilities

• Lead simultaneous development for multiple business verticals.Design & develop highly scalable, reliable, secure, and fault-tolerant systems.Ensure that exceptional standards are maintained in all aspects of engineering.Collaborate with other engineering teams to learn and share best practices.Take ownership of technical performance metrics and strive actively to improve them.Mentors junior members of the team and contributes to code reviews.

Requirements

• A passion to solve tough engineering/data challenges.Be well versed with cloud computing platforms AWS/GCPExperience with SQL technologies (MySQL,PostgreSQL)Experience working with NoSQL technologies (MongoDB,ElasticSearch)Excellent Programming skills in Python/Java/GoLangBig Data streaming services (Kinesis ,Kafka ,RabbitMQ)Distributed cache systems (Redis ,Memcache)Advanced data solutions (BigQuery, RedShift, DynamoDB, Cassandra)Automated testing frameworks and CI/CD pipelinesInfrastructure orchestration(Docker/Kubernetes/Nginx)Cloud-native tech like Lambda,ASG,CDN,ELB,SNS/SQS,S3 Route53 SES

Responsibilities:

• Develop features and modules independently based on the overall product architecture provided.
• Research and find solutions to challenging new problems; align with technology needs of the future.
• Fully grasp the product concept and think through challenging customer variations and use cases.
• Proactively seek to identify issues and resolve them at the stages of design, deployment and QA.
• Maintain quality and ensure responsiveness of applications.
• Demonstrate a strong sense of milestone-based performance and adherence to overall development timelines.

Requirements:

Experience - 2 to 5 years experience in Java Tech stack

• Strong hands-on experience in Java, Spring Boot, microservices and Rest API.
• Good understanding of general data privacy and information security.
• Exposure to cloud securities for SAAS application development would be an added advantage.
• A good understanding of all facets of building and delivering data-centric products is desirable.
• Knowledge of code versioning tools.

WHAT YOU WILL DO:

• Execute a full software development lifecycle (SDLC)
• Develop flowcharts, layouts, and documentation to identify requirements and solutions
• Write well-designed, testable, reusable code and libraries for future use
• Optimize the application for maximum speed and scalability
• Implement security and data protection
• Produce specifications and determine operational feasibility
• Integrate software components into a fully functional software system
• Develop software verification plans and quality assurance procedures
• Document and maintain software functionality
• Troubleshoot, debug and upgrade existing systems
• Deploy programs and evaluate user feedback
• Comply with project plans and industry standards
• Ensure software is updated with latest features

REQUIRED SKILLS & QUALIFICATIONS:

• Good knowledge of Core Java (Minimum Version 8)
• J2EE with a good understanding of Servlets and JSP
• Experience in Spring Modules – Spring IOC and AOP, Spring Boot (version 2 plus), JDBC
• Expertise in design and development of various web and enterprise – level applications using Java/J2EE technologies such as Spring, Hibernate, Rest services.
• Web Services (including SOAP, XML, XML Schema, JSON, and REST)
• Tools required: Maven,Eclipse, Github, and Swagger
• Good knowledge of SQL and Redis (NOSql)
• Ability to document requirements and specifications
• Proven work experience as a Software Engineer or Software Developer
• Ability to develop software in Java or any other OOPS languages
• Excellent knowledge of relational databases, SQL and ORM technologies (JPA2, Hibernate)
• Experience in developing Web Applications using at least one popular Web Framework (Spring)
• Experience with test-driven development
• Proficiency in software engineering tools

PREFERRED SKILLS & QUALIFICATIONS:

• A Bachelor’s Degree in Computer Science, Software Engineering, or other related fields.
• Eight to Ten years of Software Engineering or Software Development experience, preferably in a related field.

REPORTING: This position will report to HOD

EMPLOYMENT TYPE: Full-Time

LOCATION: Remote (Pan India) & In-Office – Jaipur, India

SHIFT TIMINGS:

Summer - 1:30pm-10:30pm IST

Winter    - 2:30pm-11:30pm IST

Detailed Job Description :

Total Exp-6-9 Yrs

Location-Noida(Singapore Travel - In next 3 Months (short term)

Mandatory:

• 6-8 years of total IT experience delivering enterprise-scale applications or product implementations
• 1-3 years of experience working as a technical lead.
• Working Experience in ISO20022, SWIFT, Remittance
• Language & Frameworks: Java, Spring Boot, Spring, Any ORM

Preferred:

• Working experience in TCS Bancs or Integration with TCS Bancs
• Database: SQL Server
• Working experience in managing projects in Java Stack.
• Good Knowledge of Microsoft stack, Static Code analyzers, Overall SDLC Lifecycle, Design & Architecture

Company Name & Profile : 

It is a leader in the integration of IT and network technologies and brings more than 100 years of expertise in technological innovation to provide solutions for empowering people, businesses and society. Headquartered in Japan, it started operations in India in the 1950s, accelerating its growth through the expansion of business to global markets. The company in India expanded its business from telecommunications to public safety, logistics, transportation, retail, finance, unified communication and IT platforms, serving across governments, businesses as well as individuals. With its Centre of Excellence for analytics platform solutions, big data, biometrics, mobile and retail, the company in India offers innovative new services and solutions for India and global markets. It operates across India with offices in New Delhi (head office), Noida, Mumbai, Chennai, and Bengaluru.

Job Responsibilities: -

• Work on building enterprise grade applications with a strong knowledge of the .net core framework. Experience with Node JS.
• Create Libraries that would be shared across the different modules in the system that can be leveraged by multiple teams within the organization.
• Good understanding of data structures to identify the correct data structure for a specific use case.
• Build RESTful API for customer consumption. Prior knowledge building APIs is a requirement. Understanding of HTTP error codes is a must.
• Work on code in a distributed code development environment. Prior use of Git/Github is desirable.
• Work with a Unit Test platform.
• Strong knowledge on Encryption standards – Asymmetric and Symmetric.
• Create and Manage System Documentations.

Job Qualifications

• At least 4+ years of experience using C# programming language in the build of enterprise software (.net core, asp.net core, web api) – For .Net Developer
• At least 7+ years of experience using C# programming language in the build of enterprise software (.net core, asp.net core, web api). – For Lead.
• Experience handling ISO8583 message standard; Payments Industry knowledge.
• Good understanding of version control (using Git/Github).
• Experience with Unit Test framework; TDD Approach.
• Knowledge and understanding of PCI Requirements for Card processing software .
• Understanding of SQL Database and Database Design.
• Strong understating of hybrid cloud application basics based on Docker, Kubernetes, Microservices and Postgres.
• Minimal 2+ years of experience in building enterprise scale applications: coding, designing, developing, and analyzing data. 
• Agile environment. AWS, Docker, Kubernetes, DevOps environment Lead levels only.
• Manage CI/CD Pipeline.
• E/B.Tech/B.Sc/MCA/Msc in Computer Science.

Company Overview

http://www.corecard.com">www.corecard.com & http://www.corecardindia.com">www.corecardindia.com

Core Card Software is a product company, to provide financial service organizations with the best card management applications to help them compete both locally and globally. Core Card Software, a leading provider of card management systems. The Core Card software solution provides the market's most feature-rich platform for processing and managing accounts receivables and a full range of card products including prepaid/stored-value, fleet, credit, debit, commercial, government, healthcare and private-label cards. Core Card have offices based in Atlanta, Bhopal & Navi Mumbai.

• Owns team's output and E2E definition and execution of SDLC. Drives sprint planning, estimates & prioritizes tasks, Keeps key stakeholders updated on progress, milestones, and any potential slippages.
• Identifies pitfalls across codebases proactively. Writes model code that is looked up to. Understands internals of programming languages & runtimes. Creates common reusable components/libraries- Uses advanced data structures.
• Designs API contracts between large systems with end-to-end service design and active leadership towards long-term sustainability including versioning, complex migration plans, impact analysis across products.
• Owns NFRs and pushes the envelope on performance, scalability, and high availability with cognizance towards the cost of infra. Drives tech stack selection independently, mentors junior engineers. Evangelises of generic platform building across the organization.
• Troubleshoots unseen issues across codebases. Solves large end-to-end cross-cutting problems with elegant solutions with an eye on long-term sustainability.
• Partners with and influences product managers on “how”. Leads the pack on hiring and evangelizes steeper hiring standards towards building an A+ team. Represents company on external platforms/conferences.

Qualifications:

• Bachelor's Degree in Computer Science or similar discipline
• 7+ years relevant work experience in software engineering while leading teams.
• Proficiency in more than one modern programming language such as Python (preferred) associated tech stack to write maintainable, scalable, unit-tested code
• Experience in building complex software systems that have been successfully delivered
• Should be strong with System Design and Database designing
• Deep understanding of design patterns, optimizations, deployments with Strong object-oriented design skills
• Experience mentoring other software engineers.
• Experience with full life cycle development in any programming language