Amit Kumar

CEO

Bengaluru, Karnataka, India3 yrs 10 mos experience

Most Likely To Switch

Key Highlights

Lead Developer for OpenJDK s390 Port Project.
Recognized as a Committer for significant contributions.
Expertise in Java Hotspot and s390x architecture.

Stackforce AI infers this person is a Backend-heavy Fullstack Developer specializing in Open Source Software and Java development.

Contact

amitlocham09@icloud.com LinkedIn

Skills

Core Skills

OpenjdkJava

Other Skills

Agile MethodologiesTeam Managements390x architectureComputer ProgrammingData StructuresHotspotLinuxOpen-Source DevelopmentOpen-Source SoftwareIBM-Z (S390x) Architecture AssemblyC++AssemblerIBM MainframeZ Systems390

About

Team Lead at IBM Research Labs (ISDL), managing the OpenJDK project (s390 Port), an open-source implementation of Java. Serving as an OpenJDK Committer for the head stream and an Author for JDK-Updates, specializing in the IBM-s390 Port and Hotspot (Runtime) component. Dedicated to ensuring seamless build-ability and functionality on the s390x architecture. Passionate about learning new C++ concepts and solving competitive programming problems.

Experience

3 yrs 10 mos

Total Experience

1 yr 3 mos

Average Tenure

2 yrs

Current Experience

Openjdk

3 roles

OpenJDK Committer, s390x (IBM-Z) Port Project Lead

May 2024 – Present · 2 yrs · Remote

From May2024 onwards, I have started my new journey as s390x Port Project Lead. I look after the new JEPs/Issues/Ports done for other architecture which could be beneficial for s390s architecture as well.

OpenJDK/Committer, IBM-Z Port Developer

Jun 2023 – May 2024 · 11 mos · Remote

I have established myself as a valuable asset within the project. With a proven track record of contributions and accomplishments, I have been granted the status of Committer, showing my record of actively contributing in OpenJDK Project.

Open-Source DevelopmentOpenJDKJava

OpenJDK/Author & IBM-Z Port Developer

Nov 2022 – Jun 2023 · 7 mos · Remote

With author status, I have the privilege to open new issues in the Java Bug System (JBS) and nominate myself for working on existing issues.

JavaOpen-Source SoftwareOpenJDK

Ibm

3 roles

Development Team Lead, OpenJDK on IBM-Z

Sep 2023 – Present · 2 yrs 8 mos · Bengaluru, Karnataka, India

I am embarking on my journey as a Lead Developer for OpenJDK s390 Port Project.
Here are few of my Individual contributions:
Added Port for JEP 475: Late Barrier Expansion for G1 Garbage Collector
Implemented Recursive Object Locking for C2 Compiler.
Improved Profiled Data collection for heavily Polluted Profiles.
Added fast path check in Thread Initialiser to avoid repeated interpreter calls for classes being initialised.
Added Port for Relocation of Field Information out of the Constant Pool Cache.
Added Port for Relocation of Method Resolution Information out of the Constant Pool Cache.
Restructured representation of whole Register class to use Values instead of pointers.
Added port for issue of frequent updates in the secondary_super_cache, as multiple threads attempting regular updates.

Agile MethodologiesTeam ManagementOpenJDKJava

Compiler Developer (OpenJDK- Java Runtime/Hotspot)

Promoted

Nov 2022 – Sep 2023 · 10 mos · Bengaluru, Karnataka, India

As OpenJDK Contributor specializing in the IBM-s390 Port and Hotspot (Runtime) component, actively involved in the development and improvement of the project. Here are some key highlights of my contributions:
Successfully Fixed multiple broken builds across various debug levels
Finished the porting of new standalone functionalities specifically designed for S390 Architectures, such as the highly efficient Use for Heavy Monitors and Fast Locking Scheme.
Co-authored pull requests to enhance the overall functionality and performance of the project, catering to all architectures.
Addressed and resolved multiple failing test cases
Implemented code enhancements to elevate code readability, enabling ease of comprehension and facilitating future modifications.
Improved the build process by implementing advanced calculations for new build job creation, resulting in reduced build time.
Recognized for the substantial impact of my contributions to the community, attaining the esteemed Committer Status.

Computer ProgrammingData StructuresOpenJDKJava

Software Engineer - Z Security and Compliance Center

Jul 2022 – Nov 2022 · 4 mos · Bengaluru, Karnataka, India

I was part of the IBM-zSCC (Z Security and Compliance Center) team, where I have worked on Integration Test repository.
started by learning LCC framework, despite its unfamiliarity at the outset, and implement tests and checks for around 64% of the APIs.
Used parallel execution method for tests, resulting in execution time reductions of up to 81%. This significantly reduced the time taken by testing process.

LinuxComputer Programming