Java / J2EE Developer

Job Title : Backend Engineer (AI-First | FinTech/Crypto)

Experience : 3 to 6 Years

Location : Gurugram (Sector 49)

Working Hours : 10:00 AM – 6:00 PM

Work Mode : On-site | 6 Days Working

Employment Type : Full-time

Role Overview :

This is not a typical ticket-based engineering role. You will take end-to-end ownership of systems—designing architecture, building scalable solutions, and solving real-world performance challenges.

We operate in an AI-first engineering environment, leveraging advanced tools and automation workflows to build high-performance distributed systems.

Mandatory Skills :

Java/Spring Boot or Node.js, System Design (HLD/LLD), Distributed Systems, Event-Driven Architecture (Kafka/RabbitMQ), Low-Latency APIs, PostgreSQL/MongoDB, CI/CD, Docker/Kubernetes, AI-assisted development (Copilot/Cursor/Claude)

Key Responsibilities :

• Design and build scalable backend systems (Java/Spring Boot, Node.js, or similar).
• Architect and implement event-driven systems (Kafka, RabbitMQ, pub/sub).
• Develop secure and reliable financial systems with strong data integrity.
• Solve scalability and performance challenges in fintech/crypto environments.
• Own features end-to-end: design → development → deployment → monitoring.
• Work with real-time data pipelines (WebSockets, streaming, event sourcing).
• Define service contracts and optimize system architecture.

AI-First Engineering (Must-Have Mindset) :

You will :

• Use tools like GitHub Copilot, Cursor, and Claude in daily development
• Follow spec-driven development using structured instructions
• Review, validate, and ship AI-generated code with strong engineering judgment

Core Requirements :

• 3+ years of backend development experience.
• Strong expertise in Java (Spring Boot) or Node.js.
• Solid understanding of System Design (HLD/LLD, Distributed Systems).
• Experience with event-driven architectures (Kafka, RabbitMQ, async pipelines).
• Hands-on experience building low-latency, high-throughput systems.
• Strong database knowledge (PostgreSQL, MongoDB, etc.).
• Understanding of security, performance optimization, and reliability.
• Experience with CI/CD, Git, Docker, Kubernetes.
• Exposure to React / React Native is a plus.

Good to Have (Differentiators) :

• Experience in FinTech / Crypto / Web3 / Blockchain.
• Built systems for trading, payments, or real-time financial data.
• Experience with AI agents, automation pipelines, or agent-based systems.
• Exposure to parallel AI workflows (coding / testing / refactoring).
• Contributions to open source or technical blogs.
• Experience handling production-scale systems.

JOB DESCRIPTION

Experience: 5-8 years

Location-Mumbai

Wissen Technology is now hiring for a Java Developer - Mumbai 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. - 5-8 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

Position Overview:

We are seeking a skilled Java Developer to join our dynamic team. The ideal candidate will have a strong foundation in Core Java and extensive experience in developing and deploying applications using Spring Boot, Apache Tomcat, and other related technologies. The candidate should possess expertise in building Restful Web Services, Microservices architecture, and be proficient in implementing multi-threading concepts.

Additionally, experience with Maven, Git, Jenkins, and Agile Scrum methodologies is essential for this role. The candidate should also have a solid understanding of software development lifecycle (SDLC) processes. Familiarity with various databases such as MySQL, PostgreSQL, Oracle, or MongoDB, along with third-party API integration and payment gateway integration, is required.

Key Responsibilities:

• Develop, test, deploy, and maintain Java-based applications.

• Design and implement Restful Web Services and Microservices using Spring Boot.

• Utilize multi-threading concepts to enhance application performance.

• Integrate third-party APIs and payment gateways into applications.

• Collaborate with cross-functional teams to gather requirements and deliver high-quality solutions.

• Participate in Agile Scrum ceremonies and contribute to sprint planning, backlog grooming, and retrospectives.

• Ensure adherence to best practices and coding standards.

• Conduct code reviews and provide constructive feedback to peers.

• Troubleshoot and debug complex issues in production environments.

• Document design decisions, processes, and procedures.

Required Qualifications:

• Bachelor’s degree in computer science, Engineering, or related field.

• Minimum 3 years of experience as a Java Developer with expertise in Core Java.

• Strong knowledge of Spring Boot, Apache Tomcat, and multi-threading concepts.

• Hands-on experience in building Restful Web Services and Microservices architecture.

• Proficiency in using Maven, Git, and Jenkins for build and deployment processes.

• Familiarity with Agile Scrum methodologies and SDLC processes.

• Experience working with databases such as MySQL, PostgreSQL, Oracle, or MongoDB.

• Demonstrated ability to integrate third-party APIs and payment gateways.

• Excellent problem-solving and analytical skills.

• Effective communication and collaboration skills.

• Familiarity with NoSQL databases like MongoDB.

• Knowledge of Azure DevOps for CI/CD pipelines

About the Role:

We are seeking a skilled Java Developer to join our team. The ideal candidate will have strong experience in core Java development along with exposure to modern frameworks and tools. You will be responsible for designing, developing, and maintaining scalable applications while ensuring performance, security, and code quality.

Key Responsibilities:

• Design, develop, test, and maintain Java-based applications.
• Write clean, efficient, and reusable code following best practices.
• Collaborate with cross-functional teams (Product, QA, DevOps, etc.) to deliver high-quality software.
• Troubleshoot, debug, and optimize application performance.
• Participate in code reviews and contribute to continuous improvement.
• Stay updated with emerging trends, tools, and technologies in the Java ecosystem.

Required Skills & Qualifications:

• Strong proficiency in Core Java (Java 8/11/17).
• Experience with frameworks such as Spring / Spring Boot / Hibernate.
• Good knowledge of REST APIs, Microservices architecture.
• Familiarity with SQL/NoSQL databases (MySQL, PostgreSQL, MongoDB, etc.).
• Understanding of multithreading, collections, and design patterns.
• Experience with version control systems (Git) and build tools (Maven/Gradle).
• Solid problem-solving skills and ability to work in an Agile environment.

Good to Have:

• Exposure to cloud platforms (AWS, Azure, GCP).
• Knowledge of containerization (Docker, Kubernetes).
• Experience with messaging systems (Kafka, RabbitMQ).
• Familiarity with CI/CD pipelines.

Apply only to this link - https://loginext.hire.trakstar.com/jobs/fk01is7?source=" target="_blank">https://loginext.hire.trakstar.com/jobs/fk01is7?source=

LogiNext is looking for a technically savvy and experienced senior engineer to lead development efforts. You will help the team grow in size and skills, optimizing their code while working on your own. You will design, and develop the products that exceed client expectations in terms of value and benefit. You will collaborate on scalability issues involving access to massive amounts of data and information.

You have hands-on experience in building secure, high-performing and scalable systems in Java. Your design intuition inclines towards usability, elegance and simplicity. You are biased towards open-source tools and existing frameworks. You have successfully shipped applications with beautiful front-end and intelligent backend. You have demonstrated strong interpersonal and communication skills.

Responsibilities

Co-lead end-to-end design and development efforts for high-volume, low-latency applications for real-time event based systems Lead and direct software engineers, define software architecture, collaborate with other teams to explore existing systems, determine areas of complexity and potential risks to successful implementation of platform modules and features Deliver high-availability and high-performance platform using micro-services architecture Identify bottlenecks and inefficiencies in code, and devise solutions to production and non-production issues Keep an eye out for open source projects and technology trends that can be introduced in the products Transform business functionalities and production specifications into technical requirements and low level design Be hands-on, adopt a practical approach to software and technology Work with product management and other teams to build highly scalable products

Requirements

Bachelor’s degree in Computer Science, Information Technology or a related field 4 to 6 years of design and development experience in scalable and distributed enterprise applications using Java/J2EE, JPA, Spring boot framework and RESTful web services Experience in managing, implementing and optimizing big data stores such as MySQL, MongoDB, Elasticsearch, Redis, DynamoDB Experience in deploying applications and using various managed services provided by cloud platforms (AWS, Azure, GCP) Experience in front-end technologies HTML5, CSS3, React.js, Angular and D3.js is preferred Strong foundation in computer science, with strong competencies in data structures, algorithms and software design Proven ability to drive large scale projects with deep understanding of Agile SDLC, high collaboration and leadership

Loyalty Juggernaut, Inc. (LJI) is a next-generation loyalty and customer engagement solutions enterprise, helping brands re-imagine their loyalty initiatives in #theageofdigitalconsumer.

Headquartered in the Silicon Valley with R & D and Professional Services presence in Hyderabad, India and Distribution offices globally. LJI is founded by customer relationship management experts with decades of experience in delivering world-class technology innovations in CRM, Loyalty, AdTech and consulting for leading global brands across industries. 

LJI delivers GRAVTY – transformational digital platform for loyalty and customer engagement built on Big Data, Micro-services based, Serverless Architecture, AI/ML delivered on the Cloud to help brands execute innovative strategies aimed at attracting, acquiring, rewarding, recognizing, engaging, and leveraging customers in order to maximize revenue, profitability and customer lifetime value.

Visit us at http://www.lji.io/">www.lji.io

LJI is inviting applications for the position of Product Engineer in our R&D Team

YOUR RESPONSIBILITIES 

As a Product Engineer in R&D team, you will  be responsible for end-end Software development life-cycle involving Technical design, implementation, deployment, and support. You will 

• Work actively with Product Specialists, Business Analysts and other stakeholders on the development of cutting-edge product features
• Partner with Customer Success teams to review and implement business requirements
• Build high-quality innovative and reusable code - design and implement new features in cooperation with the enterprise architect
• Conduct software analysis, programming, testing and debugging
• Ensure designs are in compliance with specifications
• Identify production and non-production application issues and support them

OUR TECH STACK

• Java(SpringBoot)
• Python(Django)
• PostgreSQL
• REST, WebServices
• Angular, Javascript, HTML
• Jenkins, Maven, Git, Ansible
• AWS

YOUR PROFILE

1. B.Tech or M.Tech in CSE/IT OR MCA/BCA
2. Strong programming skills
3. Analytical mind and problem-solving aptitude   
4. Excellent communication skills
5. Attention to detail  

OUR OFFERING

1. Opportunity to Innovate with and Learn from a World-class technology team
2. Dabble into the future of technology - Enterprise Cloud Computing, Blockchain, Machine Learning and AI, Mobile, Digital Wallets, and much more...
3. Grow with a fast growing company with global presence and recognition

Minimum 5-7years of professional experience building web-applications
Strong experience in backend development
Strong experience in AI/Machine Learning development, Data Analysis/Processing
Experience in creating robust and secure REST APIs
Hands-on exposure to RDBMS like PostgreSQL, MySQL, MariaDB etc.
Proficiency with one or more programming languages from Java, Python, Node/JavaScript
Solid familiarity working with cloud and related technologies, AWS, GCP and Azure cloud environments
Ability to do very quick research in unknown technologies
Startup mindset, comfort with chaos and multi-tasking ability
Strong programming fundamentals in Data Structures, Algorithms
An eye for writing performance optimum code in any tool set