Software Developer (Java - IoT)

LE300 Optiva (India) Technologies Pvt. Ltd.; Hyderabad; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

Qvantel in Hyderabad is seeking an senior Java backend engineer to design, build, and operate high-throughput microservices using Spring Boot. You will craft scalable RESTful APIs, leverage Kafka and AWS services, and ensure security with OAuth 2.0 and JWT.

You will work with MongoDB, Docker, and Kubernetes, participate in code reviews, and own features end-to-end from design through production monitoring. The role demands 8+ years of backend experience, strong problem solving, and the ability

Qualifications

• Bachelor’s degree in Computer Science or equivalent with strong academics.
• 8+ years of hands-on backend development experience.
• Proficient in Java 8+ and the Spring ecosystem (Boot, Data, Security).
• Experience with NoSQL databases, especially MongoDB.
• Strong AWS cloud, containerization, and CI/CD experience.

Responsibilities

• Design and build high-throughput Java + Spring Boot microservices serving millions of devices.
• Develop RESTful APIs secured with JWT and OAuth 2.0.
• Work with MongoDB as the primary data store; design schemas for scale.
• Containerize services with Docker; deploy on AWS EKS via CI/CD pipelines.
• Collaborate on system design for high availability and performance.
• Own features end-to-end from design to production monitoring.
• Troubleshoot production issues; drive reliability improvements.
• Leverage AI-powered tooling for code generation and reviews.

Skills

Java

Spring Boot

RESTful APIs

OAuth 2.0 & JWT

NoSQL (MongoDB)

AWS

Docker

Kubernetes

CI/CD

Kafka

Education

BE/B.Tech or ME/M.Tech in Computer Science

Top 150 Nirf engineering colleges

Tools

Git

GitHub Actions

Jenkins

Bitbucket

AWS CLI

Kubernetes CLI

Job description

It's fun to work in a company where people truly BELIEVE in what they're doing! We're committed to bringing passion and customer focus to the business.

Job Summary Key Responsibilities :

• Design, build, and maintain high-throughput Java + Spring Boot microservices serving millions of devices
• Develop RESTful APIs (JSON/XML) secured with JWT and OAuth 2.0
• Work with MongoDB as the primary data store, designing schemas and queries for scale
• Build and consume event-driven architectures using Kafka, AWS SQS/SNS, and Kinesis
• Containerize services with Docker and deploy on AWS EKS (Kubernetes) via CI/CD pipelines
• Collaborate on system design for high availability, disaster recovery, scalability, and performance
• Write clean, testable, well-documented code with strong unit and integration test coverage
• Participate in code reviews, architectural discussions, and sprint planning
• Own features end-to-end — from design and implementation through deployment and production monitoring
• Troubleshoot production issues, perform root-cause analysis, and drive reliability improvements
• Leverage AI-powered development tools for code generation, automated code reviews, test creation, technical planning, and debugging — continuously improving team productivity and code quality

Required skills :

• B.E./B.Tech or ME/M.Tech in Computer Science (or equivalent) from top 150 Nirf engineering colleges.
• 8+ years of hands-on back-end development experience
• Strong proficiency in Java (8+) and the Spring ecosystem (Spring Boot, Spring Data, Spring Security)
• Solid experience with NoSQL databases (MongoDB preferred) — schema design, indexing, aggregation pipelines
• Practical experience with AWS services (EC2, S3, SQS, SNS, Lambda, EKS, CloudWatch, or similar)
• Familiarity with Docker, Kubernetes, and container orchestration
• Experience with Git, Bitbucket/GitHub, and CI/CD tooling (Jenkins, GitHub Actions, or similar)
• Understanding of RESTful API design principles, versioning, and security (OAuth 2.0, JWT)
• Strong organizational skills — ability to define, track, and deliver work independently
• Excellent problem-solving, critical thinking, and analytical skills
• Clear, concise written and verbal communication
• Experience with event streaming platforms — Kafka, AWS Kinesis
• Working knowledge of AWS Lambda and serverless architectures
• Understanding of WebSockets and persistent connection protocols (e.g., OCPP)
• Knowledge of networking fundamentals — TCP/IP, TLS, load balancing, connection keep-alive, timeout tuning
• Experience with AWS ALB/NLB, target groups, health checks, and sticky sessions
• Exposure to Elasticsearch / OpenSearch for search and analytics workloads
• Familiarity with SQL databases (MySQL/PostgreSQL) as a secondary skill
• Experience with front-end technologies (React, JavaScript/TypeScript) — full-stack capability is a plus
• Knowledge of caching layers (Redis, ElastiCache)
• Understanding of observability — structured logging, distributed tracing, metrics (Datadog, ELK, Prometheus)
• Familiarity with shell scripting (Bash) for automation, debugging, and operational tasks
• Exposure to OCPP (Open Charge Point Protocol) or EV/IoT domain
• Experience using AI coding assistants (GitHub Copilot, Windsurf/Cursor, ChatGPT, Claude) for development, code review, and technical planning
• Experience working in renewable energy, clean tech, or IoT companies
• You thrive in a fast-paced environment with ambiguity and evolving priorities
• You take ownership — proposing solutions, not just implementing tickets

Qvantel, established in 1995, is a leading provider of digital BSS and monetization software for the telecommunications and digital services industry. Qvantel Flex is an AI-driven BSS and monetization suite enabling operators to launch new offers rapidly using low/no-code configuration and automation. In 2025, Qvantel expanded its operations and portfolio with the acquisition of charging and BSS supplier Optiva. Qvantel supports 70+ operators in over 40 countries, powered by 1,200+ specialists across all global regions. www.qvantel.com

Help our customers to accelerate digitalization to make a sustainable positive impact for their businesses, their customers and their societies. Telcos around the world are becoming digital service providers and further developing to become technology companies with diversifying portfolios and higher valuations - and Qvantel is at the forefront of powering that change. To be a leader in digital BSS, providing high-quality software and services with market-leading flexibility and openness and enabling business innovation for CSPs.

We're always looking to grow our talent pool!