Sr Java Developer

Work Mode: Full-time, in-person

Reporting To: VP – Software

Job Description

We are looking for a hands-on Technical Lead Engineer to lead the design, development, and delivery of our Head-End System (HES), Meter Data Management (MDM), and Smart Metering platform. The role requires strong backend engineering expertise, deep understanding of smart metering and utility systems, and the ability to guide a development team through architecture, implementation, integration, testing, deployment, and production support.

The ideal candidate will have practical experience building scalable IoT or utility platforms involving smart meter communication, DLMS/COSEM protocols, real-time data acquisition, validation, event processing, command execution, and integration with enterprise systems such as billing, NMS, OMS, and analytics platforms.

Key Responsibilities

• Lead end-to-end technical development of HES, MDM, AMI/AMR, and smart metering modules.
• Design scalable backend architecture for meter communication, data ingestion, validation, processing, storage, and reporting.
• Implement and guide development of DLMS/COSEM IEC 62056 based meter communication.
• Integrate with smart meters, DCUs/gateways, billing systems, NMS, OMS, analytics systems, and third-party utility platforms.
• Lead Java/Spring Boot backend development using REST APIs, messaging queues, socket programming, and distributed system patterns.
• Design high-volume data pipelines for interval data, events, alarms, billing reads, and meter health data.
• Ensure performance, scalability, fault tolerance, database optimization, and reliable production operations.
• Mentor developers, review code, define engineering standards, and guide sprint-level technical execution.
• Work with product, project, QA, deployment, and customer teams to convert utility requirements into robust technical solutions.
• Own technical troubleshooting for production issues, performance bottlenecks, device communication failures, and integration defects.
• Prepare technical documentation, architecture diagrams, API specifications, and deployment guidelines.

Required Skills

• 6+ years of software development experience, including 3+ years in smart metering, HES, MDM, AMI, IoT, or utility platforms.
• Strong hands-on experience with Java, Spring Boot, REST APIs, JDBC/JPA, multithreading, backend system design, debugging, performance tuning, and production support.
• Practical experience with DLMS/COSEM, IEC 62056, Gurux or similar frameworks, smart meter communication, meter reads, events, commands, and remote operations.
• Strong understanding of communication protocols such as TCP/IP, socket programming, FTP/SFTP, MQTT/HTTP, and related integration patterns.
• Experience with Kafka/RabbitMQ, MySQL/MariaDB, MongoDB, Redis, ClickHouse, Apache Solr, or similar messaging and data platforms.
• Knowledge of scalable architecture, including clustering, replication, load balancing, caching, retries, failover, monitoring, and large-scale time-series data handling.
• Experience leading backend engineering teams, owning technical delivery, reviewing code, and mentoring developers.
• Preferred: experience with utility/DISCOM projects, AMISP programs, billing engines, prepaid metering, NMS/OMS, energy accounting, cloud services, CI/CD, Docker/Kubernetes, observability, and cybersecurity for smart metering systems.

Education Requirement

Bachelor’s degree in Computer Science, IT, Electronics & Communication, Electrical Engineering, or a related engineering discipline is preferred. Candidates with strong hands-on HES/MDM, AMI, DLMS/COSEM, IoT, or utility software experience may be considered even with a different academic background.

Company: 3i Infotech Ltd

Location: Mumbai / Hyderabad

Job type: Full Time, Work from office

Looking for Core Java, Micro services, Spring Boot, Hibernate, Angular

Open Positions: Java Full - Stack Developer || 3 to 6 years exp – (Full stack 8)

Immediate Joiners

CTC: - 10 LPA

JD for Java Developer

Must Have Skills : Core Java ,Microservices , Angular8, Spring boot framework

Minimum 4-8 years of experience in design, development, and deployment of JAVA/J2EE-based applications, writing PL/SQL queries/store procedures.

Strong hands-on experience in design, development, and deployment of J2EE based application database design, PL/SQL complex queries, and Store procedures XML, HTML, JavaScript, AJAX

• Expertise on XML, HTML, JavaScript, AJAX
• Proficient in handling and writing complex PL/SQL queries and Stored procedures
• preferable work experience on JBOSS as an application server or any other J2EE application server
• Should have sound knowledge in product customization, implementation, and maintenance aspects
• Foresighted & good judgment in problem-solving.
• Capable of paying attention to detail.
• Good analytical and logical thinking.
• Prioritizing and organizing
• Team Player with a positive attitude.
• Process knowledge/Technical expertise
• Good Written and Verbal communication Skills

JOB DETAILS:

Job Role: Lead I - Software Engineering - Java, Spring Boot, Microservices

Industry: Global digital transformation solutions provider

Work Mode: 3 days in office, Hybrid model. 

Salary: Best in Industry

Experience: 5-7 years

Location: Trivandrum, Kochi, Thiruvananthapuram

Job Description

Job Title: Senior Java Developer Experience: 5+ years

Job Summary: We are looking for a Senior Java Developer with strong experience in Spring Boot and Microservices to work on high-performance applications for a leading financial services client. The ideal candidate will have deep expertise in Java backend development, cloud (preferably GCP), and strong problem-solving abilities.

Key Responsibilities:

• Develop and maintain Java-based microservices using Spring Boot

• Collaborate with Product Owners and teams to gather and review requirements

• Participate in design reviews, code reviews, and unit testing

• Ensure application performance, scalability, and security

• Contribute to solution architecture and design documentation

• Support Agile development processes including daily stand-ups and sprint planning

• Mentor junior developers and lead small modules or features

Required Skills:

• Java, Spring Boot, Microservices architecture

• GCP (or other cloud platforms like AWS)

• REST/SOAP APIs, Hibernate, SQL, Tomcat

• CI/CD tools: Jenkins, Bitbucket

• Agile methodologies (Scrum/Kanban)

• Unit testing (JUnit), debugging and troubleshooting

• Good communication and team leadership skills

Preferred Skills:

• Frontend familiarity (Angular, AJAX)

• Experience with API documentation tools (Swagger)

• Understanding of design patterns and UML

• Exposure to Confluence, Jira

Must-Haves

Java/J2EE (5+ years), Spring/Spring Boot (5+ years), Microservices (5+ years), AWS/GCP/Azure (mandatory), CI/CD (Jenkins, SonarQube, Git)

Mandatory Skills Required: Strong proficiency in Java, spring boot, microservices, GCP/AWS.

Experience Required: Minimum 5+ years of relevant experience

Java, Spring Boot, Microservices architecture

GCP (or other cloud platforms like AWS)

REST/SOAP APIs, Hibernate, SQL, Tomcat

CI/CD tools: Jenkins, Bitbucket

Agile methodologies (Scrum/Kanban)

Unit testing (JUnit), debugging and troubleshooting

Good communication and team leadership skills

Notice period - 0 to 15 days only (Immediate or candidates who are serving notice period and who can join by Feb)

Job stability is mandatory

Location: Trivandrum, Kochi

Virtual Interview: 31st Jan-Saturday

Nice to Haves

Frontend familiarity (Angular, AJAX)

Experience with API documentation tools (Swagger)

Understanding of design patterns and UML

Exposure to Confluence, Jira

About the Position

We are looking for a passionate and experienced software engineer to join our team at Mumbai. In this role, your primary responsibilities will be to take ownership of developing user facing applications and features in an agile manner. You will design and implement scalable and performant front-end solutions from scratch, while also taking a hard look at the existing ones.

What you will do at QI?

• Design, develop and deliver new user-facing apps and feature and improve existing ones
• Take ownership of product(s), and contribute to dev cycles and sprints planning
• Ensure technical feasibility of UI/UX design, share inputs with other teams including product, design and QA
• Optimize applications for performance, user experience and SEO
• Build reusable code and libraries. Contribute to open source projects.
• Stay up-to-date with new technologies with an eye of constantly adapting and improving our systems and methods.

Basic Job requirements

• 2 years + work experience in a similar role
• Strong experience in HTML5, CSS, DOM and front-end tooling ecosystem (Gulp,Grunt, Webpack)
• Excellent concepts and command over JavaScript
• Strong concepts and commercial experience in Vue.js
• Solid foundation in software development ( algorithm design, data structure, SDLC)
• Good concepts of unit testing and automation testing for UI components
• Good understanding of web app performance including Google Core Web Vitals metrics.

Location - Remote 

Good to have

• Basic knowledge of REST API and relational databases
• Basic understanding of browser internals
• Familiarity with web components and shadow DOM
• Exposure to progressive web app design.

About QuantInsti®

QuantInsti® was started in 2010, by the founders from iRage – a leading quant and algo trading firm in India.  From its early days focused on bridging the industry knowledge gap in the field of high-frequency trading, we have come a long way in the last decade. Today, we have a user base from 180+ countries with a growth rate much over 50% year-on-year.

At QuantInsti®, we swear by our goal of revolutionizing the way people approach the financial markets by empowering individuals and institutions with bleeding edge education and technologies. We offer high quality https://www.quantinsti.com/epat">learning experience and best-in-class https://quantra.quantinsti.com/">courses geared towards a global audience in quantitative trading and investing. Our in-house developed technology aims to bring institutional grade tools and https://quantra-blueshift.quantinsti.com/">platforms to democratize systematic and quantitative trading.

We achieve this by putting technology at the core of our business. We have a complex ecosystem of microservices and applications deployed over a fully cloud-based infrastructure. Our tech stack includes Node.js, Vue.js, Python and Docker. The team is driven by user experience, with strong focus on delivering scalable software solutions to complex and evolving business goals.

Why you should join us?

At QuantInsti, we work at the cutting edge of FinTech and EdTech offerings. We work with the newest technologies with a goal of delivering best experience to our users in a scalable manner, with high-performance and availability. If you love to be challenged intellectually, rest assured we have plenty of them for you. We follow an open and free work culture, where you are encouraged to ask questions, learn and teach. We offer a fast-paced environment where you take ownership of what you design and deliver. If you are looking for a move where you will find a reason to wake up every morning and rush to work, come join us.

Roles and Responsibilities:

• Developing new user-facing features using React.js
• Developing and implementing highly responsive user interface components using react concepts.
• Writing application interface codes using JavaScript following react.js workflows.
• Experience with RESTful APIs
• Troubleshooting interface software and debugging application codes.
• Create database schemas that represent and support business processes.
• Implement automated testing platforms and unit tests.
• Optimize application for performance and speed.
• Implementation of security and data protection.
• Provide technical support to users.

Skills:

• At least 5 years of experience as a Java Developer or similar role
• Strong expertise in Java programming language and working Knowledge on Back-end technologies such as Spring/Spring Boot.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Familiarity with database technology such as MySQL, MongoDB.
• Good knowledge of Unit Testing.
• Experience with at least one of the Cloud Services such as AWS, GCP, Azure are plus.
• Familiarity with SCRUM methodologies
• Strong organizational and project management skills.
• Excellent verbal communication skills.
• Analytical and logical skills
• Good problem-solving skills.

Qualification:

• 3-4 years of experience working as a ReactJS Developer or in a similar role.

What we offer:

• Flexible working hours
• Up to 12 Lakh insurance
• Work life balance

What You will do:

● Create beautiful software experiences for our clients using design thinking, lean and agile methodology.

● Work on software products designed from scratch using the latest cutting edge technologies, platforms and languages such as JAVA, python, Javascript, GoLang and Scala.

● Work in a dynamic, collaborative, transparent, non-hierarchical culture.

● Work in collaborative, fast-paced and value-driven teams to build innovative customer experiences for our clients.

● Help to grow the next generation of developers and have a positive impact on the industry.

Basic Qualifications:

● Experience: 4+ years.

● Hands-on development experience with a broad mix of languages such as JAVA, Python, Javascript etc.

● Server-side development experience mainly in JAVA, (Python and nodeJS can be considerable)

● UI development experience in ReactJS or AngularJS or PolymerJS or EmberJS or Jquery etc. are good to have.

● Passion for software engineering and follow the best coding concepts. ● Good to great problem solving and communication skills.

Nice to have Qualifications:

● Product and customer-centric mindset.

● Great OO skills, including design patterns.

● Experience with devops, continuous integration & deployment.

● Exposure to big data technologies, Machine Learning and NLP will be a plus.

Benefits:

● Competitive salary.

● Work from anywhere.

● Learning and gaining experience rapidly.

● Reimbursement for basic working set up at home.

● Insurance (including a top up insurance for COVID).

Location:

Remote - work from anywhere

We are seeking a highly skilled and experienced Full Stack Developer to join our dynamic team. As a Full Stack Developer, you will be responsible for designing, developing, and implementing software solutions across the entire application stack. You will collaborate with cross-functional teams, including product managers, designers, and other developers, to deliver high-quality, scalable, and maintainable software products.

Responsibilities :

1) Design and develop robust, scalable, and efficient software applications, APIs, and web services using modern technologies.

2) Collaborate with product managers, designers, and other developers to understand project requirements, user stories, and technical specifications.

3) Write clean, maintainable, and well-documented code following best practices and coding standards.

4) Perform thorough testing and debugging to ensure software quality and reliability.

5) Optimize application performance and implement security measures.

6) Stay up-to-date with industry trends and emerging technologies, and continuously improve technical skills.

7) Participate in code reviews to provide and receive constructive feedback.

8) Collaborate with team members to identify and resolve technical issues and bugs.

9) Work in an agile development environment, actively participating in sprint planning, stand-ups, and retrospectives.

10) Contribute to the continuous improvement of development processes and tools.

Requirements :

1) Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent work experience).

2) Proven experience as a Full Stack Developer or similar role, with a strong portfolio of completed projects.

3) Proficiency in front-end technologies such as HTML, CSS, JavaScript, and modern frameworks like React, Angular, or Vue.js.

4) Strong knowledge of back-end technologies such as Node.js, Python, Ruby, or Java.

5) Experience with databases and ORM frameworks (e.g., MySQL, PostgreSQL, MongoDB, SQLAlchemy, Hibernate).

6) Familiarity with cloud platforms (e.g., AWS, Azure, Google Cloud) and serverless architecture.

7) Knowledge of version control systems (e.g., Git) and collaboration tools (e.g., Jira, Trello).

8) Solid understanding of software development principles, design patterns, and best practices.

9) Excellent problem-solving skills and the ability to analyze and resolve complex technical issues.

10) Strong communication skills and the ability to work effectively in a team environment.

Preferred Qualifications :

1) Experience with containerization technologies (e.g., Docker, Kubernetes).

2) Familiarity with DevOps practices and CI/CD pipelines.

3) Experience with Agile/Scrum methodologies.

• Solid background and proven experience in the Java Tech Stacks
• Expertise in Java and in JavaScript based framework
• Expertise in multiple front-end languages and libraries (e.g., HTML/ CSS, JavaScript, XML, jQuery)
• Familiarity with databases (e.g., MySQL, MongoDB), web servers (e.g., Apache) and UI/UX design
• Experience developing desktop and mobile applications
• Familiarity with common stacks
• Excellent communication and teamwork skills
• Great attention to detail and problem-solving skills

Roles & Responsibilities

1. Position : Technical Lead (JAVA/J2EE)
2. Salary : As per the Industry standard 
3. Role: (70% Technical; 30% Team Leading Activities)
4. Successfully design medium to large-scale Enterprise solutions using Java technologies
5. Good knowledge of the design patterns like core design patterns, J2EE design patterns and architectural design patterns along with knowledge of UML
6. Lead technical discussion to provide technical guidance and create coding standards
7. Good with architecting and engineering systems independently, would want the individual to be comfortable implementing a significant part of the framework.
8. Provide technical knowledge and leadership on design and development best practices. 
9. Provide technical input on unit and integration tests for server- and client-side applications, build and deployment procedures and standards.
10. Interaction with management and module leads

Required skills

1. 5+ years of experience in developing and testing software using Java J2EE based application
2. Experience in managing team technically.
3. 3+ years of experience in Object Oriented Analysis and Design. 
4. 2+ years of experience in developing application using Spring (Spring Core, Spring ORM and Spring Batch), Hibernate.
5. 2+ years of experience in web technologies using Spring MVC, jQuery. 
6. Good knowledge of design patterns
7. Knowledge on SSL, Web application security frameworks
8. Experience in J2EE performance and scalability
9. Hands on experience on Maven, Jenkins, Nexus etc.
10. Proficient in Software development/integration/build tools like GIT, GERRIT, JIRA/BugZilla
11. Sound knowledge of Object-Oriented Analysis, Design and Design Patterns especially MVC is must
12. Good Knowledge and hands on experience on different databases.  
13. Proficient in Writing / Understanding PL / SQL objects like stored procedures, triggers.  
14. Knowledge on various Application servers including WAS, WLS and JBoss.  
15. Very strong skills in to Angular, AJAX, JSF, Struts, HTML 5, CSS, Bootstrap.  
16. Implement jUnit (unit testing framework) in the project
17. Excellent Oral and Communication skills.