Java Developer

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

Job Title: Senior Software Engineer

Location:PUNE

Job Type: Full-time

About the Role:

We are seeking a Senior Software Engineer with at least 1 year of experience in ad tech (preferred) to join our dynamic team. The ideal candidate will have strong proficiency in Java and possess problem-solving skills to design, develop, and maintain scalable software solutions in the ad tech industry.

Key Responsibilities:

• Develop and maintain high-quality Java-based applications.
• Collaborate with cross-functional teams to design and implement new features.
• Troubleshoot and debug issues, ensuring optimal software performance.
• Write clean, scalable, and efficient code while adhering to best practices.
• Participate in code reviews and provide mentorship to junior engineers.

Requirements:

• Proven experience with Java and software development.
• At least 1 year of experience in ad tech (preferred).
• Strong understanding of object-oriented design and data structures.
• Excellent communication and collaboration skills.
• Ability to work independently and manage time effectively.

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.

Job Title: IAC SRE Engineer

Location: Pune, Mumbai, Bangalore

Experience Required: 4 Years

Role Overview:

We are looking for experienced IAC Engineers with a strong background in Akamai, Data Structures & Algorithms (DSA), Java, and DevSecOps. The ideal candidate should have hands-on development experience, be proficient in writing Infrastructure as Code using Terraform, and demonstrate strong problem-solving skills.

Core Skills:

• Akamai – Strong experience in CDN, caching, and performance optimization.
• Data Structures & Algorithms (DSA) – Strong problem-solving and coding abilities.
• Java – Solid programming background and experience in development.
• DevSecOps – Understanding of integrating security in CI/CD pipelines and infrastructure.

Good to Have:

• WAF (Web Application Firewall) – Knowledge of WAF is a plus, though not mandatory.

Additional Skills:

• Experience with SRE (Site Reliability Engineering) practices is beneficial.
• Strong hands-on with Terraform for managing cloud infrastructure.

oin us and be a part of a company that thrives on creativity, technology, and excellence. 

CHANCE TO WORK WITH APPS WITH 10LAKH CONCURRENT USERS IN GAMING INDUSTRY 

Role Description 

• You are a champion at Code reviews and Unit/Mock/integration Tests 
• You have a strong sense of ownership of what you design and deploy 
• You provide strong technical mentorship to team members 
• You are an excellent team player 
• You continuously learn and improve 

We are seeking a highly motivated and experienced Senior Java Software Engineer to join our team. In this role, you will lead and manage software development projects across diverse domains such as Gaming, Banking, Fintech, Fantasy Sports, IT, E-commerce, Logistics, Healthcare, and On-Demand Services. You will be responsible for ensuring the successful delivery of projects, meeting deadlines, and exceeding client expectations. 

Skill Sets 

• Excellent Programmer: in Java Intermediate (Collections, Polymorphism, Design Patterns) to Expert level (Annotations, Lambda, Streaming, Concurrency) 
• Startup Experience: Proven ability to take extreme ownership of results, with a history of leaving a lasting impact on the business. 
• Relevant Experience: At least 6-10 years of experience demonstrated the ability to develop resilient, high-performance, and scalable code tailored to application usage demands. 
• Java Framework Expertise: Significant experience in designing and building Java microservices with VERT.X, SPRING BOOT, with proficiency in Java. 
• REST API & GraphQL: Hands-on expertise in development API endpoints with RESTful & GraphQL approach, also non-REST frameworks like gRPC over Thrift or Protobuf Nuances of TCP, UDP, HTTP, HTTP2, SSL, Thorough understanding of designing distributed systems without single point of failures 
• Cloud Proficiency: Strong understanding and hands-on experience of building applications deployed on the cloud using Google Cloud Platform or Amazon Web Services (AWS), Docker, and Kubernetes, Experience writing batch/cron jobs using Python and Shell scripting. 
• Containerization & Orchestration: Experience with containerization technologies like Docker and orchestration tools like Kubernetes. 
• Time & Space Complexity: if methods you write are in the traffic request path, you know how to avoid unacceptable time complexity & space complexity. 
• Database Knowledge: Strong experience with Data Structures & Algorithms working with MongoDB, PostgreSQL, MySQL, Redis, ElasticSearch, and other similar databases, ability to choose the right data store for the given requirements Relational, Graph, Object, Document, Columnar, Key-Value. Experience with Redis, Memcache, EHCache, Hazelcast, Aerospike 
• Messaging Systems: Proficiency in working with RabbitMQ, BullMQ & others 
• Agile Practices: At least a few years of experience practicing the SCRUM framework, collaborating with scrum masters, product owners, and other stakeholders. 
• Collaboration & Communication: A team player who thrives in a remote, collaborative environment. 
• Communication Skills: Strong verbal and written communication skills. 
• Solutions-Oriented: Comfortable with the fast pace of startup life and adept at finding solutions to challenges. 

Responsibilities 

• Scalable Architecture: Lead the design and development of scalable architecture to ensure efficient performance and reliability of web and mobile applications. 
• Informed Decisions: Make informed architectural decisions that align with both current and future business needs. 
• Security & Privacy: Ensure security and privacy considerations are integrated into the selection of solutions and coding of back-end services and API endpoints. 
• Code Quality & High Standards: Uphold high standards of code quality through regular reviews, maintaining best practices in programming. 
• Robust Testing: Implement robust testing strategies to ensure code reliability and performance. 
• Backend Development: Design, develop, and deploy backend services and APIs using VERT.X, SPRING BOOT Java and AWS technologies. 
• NoSQL Expertise: Effective schema design and data modeling for NoSQL databases, ideally MongoDB, including robust indexing strategies. 
• Technical Debt Management: Monitor and control technical debt to ensure it does not compromise application scalability or performance. 
• Task Planning: Collaborate with the PM and BA to plan and delegate tasks efficiently among backend team members, ensuring clear objectives and timelines. 
• User Requirements: Support the PM, BA team in identifying and analyzing user requirements to ensure development aligns with user expectations and project scope. 
• Systems Thinking: Apply systems thinking to align with broader business objectives. 
• Autonomy: Get things done independently without supervision and without creating future issues. 
• Simplicity: Strive for simplicity in solutions and code. 
• Proactive Problem Solving: Fix problems, even those outside your immediate responsibility. 
• Solution-Oriented: Focus on providing solutions to problems, not just writing code. 

Life@Sciflare:  

• An exciting & lively workplace gives you the chance to work in an environment where you may unleash your creativity and inventiveness to the best extent possible. 
• Work in a collaborative setting where your cooperative team contributes new perspectives to your objectives and forges strong bonds. 
• Growth mindset: You are nurtured through each stage of your professional advancement by learning and unlearning new things. 

About Rocketlane

https://rocketlane.com/">Rocketlane is a SaaS startup founded in April 2020 by https://www.linkedin.com/in/srikrishnang/">Srikrishnan Ganesan, https://www.linkedin.com/in/vignesh-girishankar/">Vignesh Girishankar, and https://www.linkedin.com/in/deepakbsub/">Deepak Balasubramanyam. Before Rocketlane, they built a successful in-app messaging startup that was acquired by Freshworks(NASDAQ: FRSH) in 2015.

Rocketlane launched in June 2021 and washttps://www.producthunt.com/posts/rocketlane"> #1 Product of the day on Product Hunt. It has a fast-growing, global customer base, including LinkSquares, AppCues, ContractPodAI, Chargebee, parcelLab, and many more.

Rapid early traction and customer love has catapulted Rocketlane to be recognized as a Leader in the G2 Category of Client Onboarding. Rocketlane has raised $21M in capital from global VCs such as 8VC, Nexus Venture Partners, Matrix Partners India, and super angels like Gokul Rajaram and Girish Mathrubootham.

Rocketlane offers a first-of-its-kind collaborative customer onboarding platform that enables businesses to onboard their customers better, faster, and smoother. It helps speed up revenue recognition and grow NRR for the vendor and enables faster time-to-value and a delightful customer onboarding experience.

What’s the opportunity?

Are you a backend developer looking to fast-track your learning and growth? Have you looked at world class products like Asana, Notion, or Airtable, and felt “I wish I were part of the early team that built these products”?

At Rocketlane, we’re a team that has previously built and rolled out globally successful SaaS products used by tens of thousands of customers. We’re laser focused on delivering a world class product again, and looking for an ambitious backend engineer to join our existing team of 9 engineers.

If it excites you to think of a fast-paced start-up environment, building something big from scratch, breaking down new problems, creating new APIs, working on performance issues, getting hands-on with devops initiatives, and showcasing demos of your work every Friday with a happy and passionate team, then this is the right opportunity for you.

Some of the tech problems you get to work-on as a backend engineer would be to build the backend for a modern spreadsheet experience from scratch, work on infra as code, write robust code that is fault tolerant, work on performant code that adheres to SLOs set by the organization. 

About you:

• 3 - 7 years of experience
• Expertise in the following areas
• Java
• HTTP Protocol
• You’ve heard of or worked with some of the following tech stacks / products
• Spring
• PostgreSQL
• Redis
• Docker
• Message brokers
• GitHub
• These non-functional areas are familiar to you
• Performance 
• Debugging
• Log management

Nice to have:

• Familiarity with AWS

What’s in it for me?

• Great opportunity: Rocketlane genuinely cares about everyone we hire. You’ll learn new things and grow no matter how experienced you are; you will be working with founders who have more than three decades of collective experience in building significant B2B SaaS startups. 
• Great team: Work with a world-class, high-velocity team that truly embodies the values of empathy, curiosity, and customer-centricity. Check out thehttps://www.linkedin.com/feed/hashtag/?keywords=rocketlane_meet_the_team"> MTT(Meet The Team) videos on our LinkedIn. 
• Great culture: An open, fun, and exciting startup culture that empowers its people to champion big problems with the freedom to think and innovate.
• Growth:  You could easily and quickly transition into other sales roles you might like.
• Impact: You get to be part of a global, passionate team in a fast-paced and growth-oriented environment. The team has a work philosophy of being high on ambition, ownership, and a bias for action.
• Monetary rewards and benefits: Competitive stipend, flexible leave policy, and more! 

Software Development Engineer (III) @ REBEL FOODS

We are surrounded by the world's leading consumer companies led by technology - Amazon for retail, Airbnb for hospitality, Uber for mobility, Netflix and Spotify for entertainment, etc. Food & Beverage is the only consumer sector where large players are still traditional restaurant companies. At Rebel Foods, we are challenging this status quo as we are building the world's most valuable restaurant company on the internet, superfast. The opportunity for us is immense due to the exponential growth in the food delivery business worldwide which has helped us build 'The World's Largest Internet Restaurant Company' in the last few years. Rebel Foods current presence in 7 countries (India, Indonesia, UAE, UK, Malaysia, Singapore, Bangladesh) with 15 + brands and 3500+ internet restaurants has been built on a simple system - The Rebel Operating Model. While for us it is still Day 1, we know we are in the middle of a revolution towards creating never seen before customer-first experiences. We bring you a once-in-a-lifetime opportunity to disrupt the 500-year-old industry with technology at its core.

We urge you to refer to the below to understand how we are changing the restaurant industry before applying at Rebel Foods.

https://jaydeep-barman.medium.com/why-is-rebel-foods-hiring-super-talented-engineers-b88586223ebe">Link

https://jaydeep-barman.medium.com/how-to-build-1000-restaurants-in-24-months-the-rebel-method-cb5b0cea4dc8">Link 1

https://medium.com/faasos-story/winning-the-last-frontier-for-consumer-internet-5f2a659c43db">Link 2

https://medium.com/faasos-story/a-unique-take-on-food-tech-dcef8c51ba41">Link 3

An opportunity to revolutionize the restaurant industry

Here, at Rebel Foods, we are using technology and automation to disrupt the traditional food industry. We are focused on building an operating system for Cloud Kitchens - using the most innovative technologies - to provide the best food experiences for our customers. 

You will enjoy working with us, if:

• You are passionate about using technology to solve customer problems
• You are a software craftsman or craftswoman who is obsessed with high quality software
• You have a flair for good design and architecture
• You are unafraid of rearchitecting or refactoring code to improve it
• You are willing to dive deep to solve complex software issues
• You are a teacher and mentor

Our technology ecosystem:

• Languages: Java, Typescript, Javascript, Ruby
• Frameworks: Spring Boot, NodeJS, ExpressJS
• Databases: AWS Aurora, MySQL, MongoDB
• Cloud: AWS
• Microservices, Service Oriented Architecture: REST APIs, Caching, Messaging, Logging, Monitoring and Alerting
• CI/CD and DevOps
• Bitbucket, Jira

You will mostly spend time on the following:

• Leading the design and implementation of software systems
• Driving engineering initiatives across teams with a focus on quality, maintainability, availability, scalability, security, performance and stability
• Writing efficient, maintainable, scalable, high quality code
• Reviewing code and tests
• Refactoring and improving code
• Teaching and mentoring team members
  
  
  

We’re excited about you if you have:

• At least 4+ years of experience in software development, including experience building microservices and distributed systems
• Excellent programming skills in one or more languages: Java, C#, C++, Typescript, Javascript, Python or Ruby
• Experience working in Cloud environments: AWS, Azure, GCP
• Experience building secure, configurable, observable services
• Excellent troubleshooting and problem-solving skills
• The ability to work in an Agile environment
• The ability to collaborate effectively within and across engineering, product and business teams

We value engineers who are:

• Crazy about customer experience
• Willing to challenge the status quo and innovate
• Obsessed with quality, performance and frugality
• Willing to take complete responsibility and ownership of results
• Team players, teachers, mentors

The Rebel Culture

We believe in empowering and growing people to perform the best at their job functions. We follow outcome-oriented, fail-fast iterative & collaborative culture to move fast in building tech solutions. Rebel is not a usual workplace. The following slides will give you a sense of our culture, how Rebel conducts itself and who will be the best fit for our company. We suggest you go through it before making up your mind.

https://www.slideshare.net/">Link 4