Java Developer

We’re looking for a Backend Developer (Python) with a strong foundation in backend technologies and

a deep interest in scalable, low-latency systems.

Key Responsibilities

• Develop, maintain, and optimize backend applications using Python.

• Build and integrate RESTful APIs and microservices.

• Work with relational and NoSQL databases for data storage, retrieval, and optimization.

• Write clean, efficient, and reusable code while following best practices.

• Collaborate with cross-functional teams (frontend, QA, DevOps) to deliver high quality features.

• Participate in code reviews to maintain high coding standards.

• Troubleshoot, debug, and upgrade existing applications.

• Ensure application security, performance, and scalability.

Required Skills & Qualifications:

• 2–4 years of hands-on experience in Python development.

• Strong command over Python frameworks such as Django, Flask, or FastAPI.

• Solid understanding of Object-Oriented Programming (OOP) principles.

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

• Proficiency in writing and consuming REST APIs.

• Familiarity with Git and version control workflows.

• Experience with unit testing and frameworks like PyTest or Unittest.

• Knowledge of containerization (Docker) is a plus.

Job Title: Senior Linux Kernel Engineer

Experience: 5–10 Years

Location: Bangalore / Chennai

Domain: Enterprise Linux / Kernel Development

Job Summary

We are seeking a highly skilled Senior Linux Kernel Engineer with deep expertise in kernel development, debugging, and performance optimization. The role involves working on enterprise-grade Linux distributions, kernel lifecycle management, security patching, and low-level hardware integration.

Key Responsibilities

1. Kernel Lifecycle & Maintenance

• Lead kernel upgrade strategies (e.g., LTS migrations such as 5.15 → 6.x) while ensuring stability and compatibility.
• Perform patch porting across kernel versions, resolving API and dependency conflicts.
• Track and mitigate security vulnerabilities by monitoring CVEs and upstream sources (e.g., LKML).
• Backport critical fixes to production kernels without impacting system stability.

2. Debugging & System Stability

• Act as an escalation point for kernel panics and system crashes.
• Perform post-mortem analysis using kdump, crash, and gdb.
• Debug early boot issues (UEFI, initramfs, kernel initialization).
• Conduct performance analysis using eBPF, ftrace, and perf to optimize system behavior.

3. Driver Development & Hardware Integration

• Design, develop, and maintain device drivers (network, storage, GPU, or character devices).
• Work closely with hardware through DMA, interrupts (MSI-X), and register-level programming.
• Maintain out-of-tree drivers using DKMS or similar frameworks.
• Ensure compatibility of drivers across kernel updates.

Required Technical Skills

• Programming: Strong expertise in C (mandatory) and C++
• Kernel Internals: Deep understanding of:
• Virtual File System (VFS)
• Memory Management (MMU, Paging)
• Process Scheduler
• Linux Networking Stack
• Debugging Tools:
• kdump, crash, gdb
• kprobes, trace-cmd, ftrace
• perf, valgrind
• Hardware debugging tools (JTAG, Serial Console)
• Build Systems:
• Kbuild, Makefiles
• Kernel packaging (RPM/Debian)
• Security:
• Experience with CVE patching and backporting
• Knowledge of SELinux/AppArmor
• Kernel hardening (FIPS, KSPP)

Preferred Skills

• Experience contributing to open-source kernel projects
• Familiarity with Linux Kernel Mailing List (LKML) workflows
• Exposure to enterprise Linux distributions (RHEL, Ubuntu, SUSE)
• Experience with performance tuning and system optimization at scale

1. Core Programming (C Language)

• Must have strong hands-on experience in C programming
• Comfortable with pointers, memory management, and low-level concepts

2. Kernel Internals Expertise

• Should have worked in at least one subsystem:
• VFS / File Systems
• Memory Management
• Scheduler / Networking

3. Debugging & Crash Analysis

• Experience handling kernel panics
• Hands-on with vmcore analysis tools

4. Security & Patching

• Understanding of CVE fixes and backporting

5. Driver Development

• Experience in writing or maintaining device drivers

6. Performance & Advanced Debugging

• Exposure to eBPF, ftrace, perf

7. Hardware-Level Understanding

• Knowledge of DMA, interrupts, hardware interaction

Soft Skills

• Strong analytical and problem-solving abilities
• Excellent communication skills
• Ability to work independently and in collaborative environments
• Quick learner with adaptability to new technologies

Key Responsibilities:

• Design, develop, and maintain Java-based applications using best practices and modern frameworks.

• Integrate and manage AWS services such as EC2, S3, RDS, Lambda, and CloudFormation.

• Develop RESTful APIs and microservices architecture to support scalable and robust applications.

• Implement CI/CD pipelines using tools like Jenkins, Git, and Docker to automate deployment processes.

• Monitor and troubleshoot application performance, defect triaging, and reliability issues, providing timely support and resolution.

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

• Conduct code reviews and ensure adherence to coding standards and best practices.

• Stay updated with the latest industry trends and AWS services to continuously improve our technology stack.

Qualifications:

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

• 5-7 years of experience in Java development, with a strong understanding of object-oriented programming and design patterns.

• Proficiency in AWS services such as EC2, S3, RDS, Lambda, CloudFormation, etc.

• Experience with Spring Boot and other Java frameworks.

• Strong knowledge of SQL and NoSQL databases.

• Familiarity with containerization technologies like Docker and Kubernetes.

• Experience with CI/CD tools and processes.

• Excellent problem-solving skills and the ability to work independently and as part of a team.

• Strong communication skills and the ability to articulate technical concepts to non-technical stakeholders.

Radisys Corporation, a global leader in open telecom solutions, enables service providers to drive disruption with new open architecture business models. Our innovative technology solutions leverage open reference architectures and standards, combined with open software and hardware, to power business transformation for the telecom industry. Our services organization delivers systems integration expertise necessary to solve complex deployment challenges for communications and content providers.

Job Overview :

We are looking for a Lead Engineer - Java with a strong background in Java development and hands-on experience with J2EE, Springboot, Kubernetes, Microservices, NoSQL, and SQL. As a Lead Engineer, you will be responsible for designing and developing high-quality software solutions and ensuring the successful delivery of projects. role with 7 to 10 years of experience, based in Bangalore, Karnataka, India. This position is a full-time role with excellent growth opportunities.

Qualifications and Skills :

- Bachelor's or master's degree in Computer Science or a related field

- Strong knowledge of Core Java, J2EE, and Springboot frameworks

- Hands-on experience with Kubernetes and microservices architecture

- Experience with NoSQL and SQL databases

- Proficient in troubleshooting and debugging complex system issues

- Experience in Enterprise Applications

- Excellent communication and leadership skills

- Ability to work in a fast-paced and collaborative environment

- Strong problem-solving and analytical skills

Roles and Responsibilities :

- Work closely with product management and cross-functional teams to define requirements and deliverables

- Design scalable and high-performance applications using Java, J2EE, and Springboot

- Develop and maintain microservices using Kubernetes and containerization

- Design and implement data models using NoSQL and SQL databases

- Ensure the quality and performance of software through code reviews and testing

- Collaborate with stakeholders to identify and resolve technical issues

- Stay up-to-date with the latest industry trends and technologies

Requirements:

• Required experience of 3 to 8 years

• Required Skill Set: Core Java, Java 8, Spring, Spring Boot, Database, Unit Testing & Rest API.

• Good to have Microservices

• Familiarity with concepts of MVC, JDBC, and RESTful

• You will be responsible to perform- requirement analysis, high-level design, coding, unit testing, and general quality assurance of the web applications

• Knack for writing clean, readable Java code

• Understanding fundamental design principles behind a scalable application

• Good to have knowledge of Spring Security, and JPA

Responsibilities:

• Designing and implementing Java-based applications.

• Analyzing user requirements to inform application design.

• Defining application objectives and functionality.

• Aligning application design with business goals.

• Developing and testing software.

• Debugging and resolving technical problems that arise.

• Producing detailed design documentation.

• Recommending changes to existing Java infrastructure.

• Developing multimedia applications.

• The Architect/ Lead Backend Engineer will handle the digital experience from inception to go-live model.
• The role holder is expected to create a vision and roadmap for the digital experience to provide best in class customer experience for each of the product solutions handled.  The role holder will play a critical role in leading the innovation and growth of our front end web and mobile platforms.
• Must be from Good Companies and have been working on high Scale of Traffic
• Proficiency in engineering practices and writing high quality code, with expertise in either one of Java or Groovy or Go.
• 3+ years of experience building microservices.
• Strong experience in architecting and building distributed systems, scalability, and availability
• Strong knowledge of data structures, algorithms, and designing for performance
• Strong knowledge of cloud technologies like AWS/Google Cloud/Azure
• Good understanding of RxJava or Actors framework
• Proficient with RDBMS
• Strong knowledge on data stores, database design, data modelling and SQL queries
• Extensive experience building and owning large- scale distributed backend systems
• Experience working with three or more of : Unix/Linux environments, Distributed and parallel systems, Workflow automation, CI/CD Platform development, Cloud platforms development e.g. AWS/GCP, Kubernetes/Container platforms based development 

1. Should be very strong Scala development(Coding)
2. With Any combination of Java/Python/Spark/Bigdata
3. 3+ years experience in Core Java/Scala with good understanding of multithreading
4. The candidate must be good with Computer Science fundamentals
5. Exposure to python/perl and Unix / K-Shell scripting
6. Code management tools such as Git/Perforce.
7. Experience with large batch-oriented systems 
8. DB2/Sybase or any RDBMS
9. Prior experience with financial products, particularly OTC Derivatives
10. Exposure to counterparty risk, margining, collateral or confirmation systems

What is the work?

• You will be a part of Technology Team, involved in all the stages of architecture to development of our web based applications product.
• Designing and developing applications using Microsoft Technologies (ASP.NET MVC, C#, ASP.NET Core) with Angular or React JS
• Writing detailed programs through discussion with clients, clarifying what actions the program is intended to perform

What skills and experience are we looking for?

• Minimum 3 years of working experience in .NET based application.
• Must have knowledge with Asp.net Core 2.0 or higher, Web API & C#.
• Must have atleast 1 year of current working experience into asp.net core along with either Angular or React JS.
• A good understanding of modern front-end web development techniques including HTML5, CSS3, JavaScript, knockout, angular, react js, and jQuery libraries.

• Experience of debugging and troubleshooting websites and web applications.

• Knowledge of Azure and DevOps process and worked with 'Source control' (SVN/TFS/GIT/VSTS).
• Knowledge of Agile Development Methodologies like SCRUM.
• Willingness to learn and improve.
• Should possess strong problem-solving skills.
• Good Communication skills
• Has the ability to do multitasking and assist others by maintaining strong communication with colleagues and clients .