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As a Senior Software Engineer at Walnut, you will be part of a team thats excited about building amazing products while taking pride in the code that powers it. We embrace functional programming principles across our stack, leveraging ReScript on the frontend and Elixir on the backend to build robust, maintainable systems.

Our current stack is composed of React, ReScript, Elixir, GraphQL, Docker, and AWS.

What you will do:

Own features end-to-end, from development through testing and deployment.
Design and develop full-stack solutions that power our core product features.
Collaborate with stakeholders to define, build, and release new features.
Participate in technical decision-making regarding architecture and technology choices.
Ensure code quality and system security through automation, unit testing, and structured code reviews.
Help maintain and improve our development practices and processes.
Work autonomously and manage priorities effectively in our asynchronous, remote-first environment.

We are looking for an experienced engineer, to help us develop our cutting-edge semiconductor platform.
Youll have the opportunity to join a top-tier, agile, fast-paced team, and take part in the development of the technology that powers the worlds largest cloud provider.
Our Web Services offers a highly reliable, scalable, low-cost cloud platform that enables hundreds of thousands of businesses in 190 countries around the world.
We are looking for talented people to join the Chip Design team in TLV, working on the Nitro product line.
Take an active, significant part in developing the next generations of products that will enable AWS to be the lead in the Cloud sector.

To apply: please compile your CV and university grades sheet into 1 pdf, without both documents, your application cannot be considered.

Key job responsibilities:
Full ownership of one or more IPs within the product:
- Micro-architecture.
- RTL coding and debug.
- Synthesis and timing closure.
- Sign-off.
Supporting the Verification and Emulation teams:
- Test plan.
- Coverage review.
Ensuring that the chip meets quality and reliability standards
Collaborating with cross-functional teams, including Product Definition, Verification, Software, and Physical design.

We are seeking an exceptional Applied Scientist to join our Prime Video Sports tech team in Israel. Our team is dedicated to developing state-of-the-art science to allow for personalizing the customers experience and customers to seamlessly find any live event in our selection. You will have the opportunity to work on innovative, large-scale projects that push the boundaries of what's possible in sports content delivery and engagement. Your expertise will be crucial in tackling complex challenges such as temporal information retrieval, leveraging Generative AI and Large Language Models (LLMs), and building state-of-the-art recommender systems.

Key job responsibilities:
We are looking for an Applied Scientist with domain expertise in Personalization, Information Retrieval, and Recommender Systems, or general ML to lead the development of new algorithms and end-to-end solutions. As part of our team of applied scientists and software development engineers, you will be responsible for researching, designing, developing, and deploying algorithms into production pipelines. Your role will involve working with cutting-edge technologies such as Gen AI/LLMs to enhance content discovery and search capabilities. You'll also tackle unique challenges like temporal information retrieval to improve real-time sports content recommendations. As a technologist, you will drive the publication of original work in top-tier conferences in Machine Learning and Information Retrieval. We expect you to thrive in ambiguous situations, demonstrating outstanding analytical abilities and comfort in collaborating with cross-functional teams and systems. The ideal candidate is a self-starter with the ability to learn and adapt quickly in our fast-paced environment.

We are currently hiring Data Center Engineering Operations Technicians to work as technical resources in our mission-critical data centers in Israel.

Data Center Engineering Operations Technician will help ensure the availability and reliability of data center operations, meeting or exceeding service levels. Due to the rapid expansion of our Data Centers, we are seeking individuals to operate and maintain these facilities, contributing to both facility maintenance and efficiency improvements that provide better value for our customers.

Key job responsibilities
- Assist in the operation and maintenance of electrical, mechanical, fire/life safety, and HVAC equipment within the data center. This equipment supports mission-critical servers and must maintain better than 99.999% uptime.
- Support the maintenance and monitoring of all data center systems, including incidents, events, problems, changes, and escalations.
- Troubleshoot and monitor mechanical, electrical, HVAC, voice/data, cooling, fire/life safety systems, and generators.
- Assist contractors or engineers in maintaining facility equipment, deploying new equipment (racks, cabling, etc.), and conducting site walkthroughs to verify equipment and system operations.
- In this role, you will act as a First Responder to critical events and support both new and existing data center facilities.

A day in the life
- Monitoring alarms and systems that manage power, cooling, and fire suppression in the data center.
- Coordinating vendor work on-site to ensure equipment is maintained and uptime is preserved.
- Supporting other teams and sites during events and planned works.
- Handling rack installations and powering up equipment.
- Monitoring and facilitating the handover of new equipment.
- Sharing knowledge and supporting new team members.
- Participating in event response drills.

We are currently hiring Data Center Engineering Operations Technicians to work as technical resources in our mission-critical data centers in Israel.

Data Center Engineering Operations Technician will help ensure the availability and reliability of data center operations, meeting or exceeding service levels. Due to the rapid expansion of our Data Centers, we are seeking individuals to operate and maintain these facilities, contributing to both facility maintenance and efficiency improvements that provide better value for our customers.

Key job responsibilities:
- Assist in the operation and maintenance of electrical, mechanical, fire/life safety, and HVAC equipment within the data center. This equipment supports mission-critical servers and must maintain better than 99.999% uptime.
- Support the maintenance and monitoring of all data center systems, including incidents, events, problems, changes, and escalations.
- Troubleshoot and monitor mechanical, electrical, HVAC, voice/data, cooling, fire/life safety systems, and generators.
- Assist contractors or engineers in maintaining facility equipment, deploying new equipment (racks, cabling, etc.), and conducting site walkthroughs to verify equipment and system operations.
- In this role, you will act as a First Responder to critical events and support both new and existing data center facilities.

A day in the life:
- Monitoring alarms and systems that manage power, cooling, and fire suppression in the data center.
- Coordinating vendor work on-site to ensure equipment is maintained and uptime is preserved.
- Supporting other teams and sites during events and planned works.
- Handling rack installations and powering up equipment.
- Monitoring and facilitating the handover of new equipment.
- Sharing knowledge and supporting new team members.
- Participating in event response drills.

We are looking for an experienced backend engineer to help us evolve our virtual mobile device orchestration platform. Thanks to your work, our customers will be able to instrument virtual mobile devices to record and replay automated tests for their mobile applications, and to analyze test results with help of comprehensive data we collect during the test execution. You would have ownership of the whole flow between the platform backend and our services running on the Android emulators.

You would be:

Proposing, designing and implementing changes in our backend platform services to support robust and reliable communication with our farm of virtual mobile devices, supporting new ways of instrumentation of those virtual devices to record test cases or perform playback of tests and collection of test results and troubleshooting data.

Improving on our services running on Android OS which provide low level device instrumentation.

Solving complex engineering problems that may include reverse engineering and hacking the Android realm to expose unique features to our customers.

Collaborating with the rest of the team to achieve high SLA for our services and using observability tools to detect and troubleshoot issues in our staging and production environments.

We are seeking a passionate, dynamic, and skilled SW Development engineer, who shares our vision of assisting development departments and teams, in successfully navigating the product development process and DevOps.


Key Responsibilities we are looking for:
Understand the clients needs and build a work plan that meets its goals.
Committed to expertise in variety of fields to lead the clients to success.
Lead and mentor development teams to enhance their skills and knowledge.
Continuously improve, learn and stay up to date with the latest technologies and best practices.

Our Data Solutions Group is looking for an exceptional Python developer with Data Engineering experience.

We seek a passionate senior DevOps engineer with a can-do approach to join our DevOps team. The DevOps team is responsible for writing and maintaining CI/CD pipelines and automating infrastructure provisioning, allowing our R&D teams to meet their ambitious goals.



Key Responsibilities:



Architect, develop, and optimize robust CI/CD pipelines to streamline software delivery and deployment processes.
Automate, orchestrate, and enhance mission-critical infrastructure while ensuring system scalability, security, and high availability.
Collaborate closely with R&D, product teams, and engineers to understand challenges and provide tailored DevOps solutions.
Continuously evaluate, refine, and innovate DevOps methodologies, tools, and best practices to maximize efficiency.
Troubleshoot and resolve complex issues across development, testing, and production environments, ensuring seamless system operations.
Operate with a DevOps-first mindset, championing collaboration, automation, and observability.
Stay ahead of the curve with emerging technologies, industry trends, and best practices, driving continuous improvement.

We are looking for a senior embedded software engineer to join us in researching and developing cutting-edge cyber security projects.



Responsibilities

As an Embedded researcher and developer, you will be dealing with:

● Real-time Embedded End-to-End Low-Level software development on various unique embedded platforms and environments.

● Researching complex Embedded systems.

we are looking for an experienced R&D Team Lead to head a talented group of engineers developing critical components for an advanced security solution running on Windows. Our core product is a C++ agent deployed on customer endpoints, supported by robust Python infrastructure.

This is a hands-on leadership role combining technical excellence with team management. Youll work closely with our Core, Research, and Module teams to develop features in both User Mode and Kernel Mode, while ensuring top-tier software quality, reliability, and performance. We operate in a modern CI/CD environment using Docker and automation pipelines.



What You'll Be Doing

Lead and mentor a team of 45 experienced software engineers

Own end-to-end development processes: research, design, coding, testing, and deployment

Collaborate with cross-functional teams across a ~5-team R&D group

Set coding standards and best practices for C++ and Python in both user and kernel space

Design and maintain CI/CD processes for mission-critical system components

Ensure code quality, documentation, and robust review processes

Communicate with external partners and customers when needed

we're seeking a talented developer to join our high-octane team. You'll play a vital role in researching, developing, and maintaining critical cybersecurity infrastructure tools for the entire branch.

What You'll Do

Research, develop, test, and maintain robust cybersecurity tools.
Proactively identify areas for improvement and champion your ideas for a better future.
Collaborate closely with fellow security developers in a fast-paced environment.

We are looking for exceptionally diverse software developers for a leading team to design and develop our flagship product.



What you'll do

Collaborate with cross-functional teams to deliver high-quality, secure, and scalable solutions
Stay up-to-date with the latest mobile technologies and industry trends
Design and develop a cutting-edge product, with significant impact and importance
Work closely with exceptional people in our field.

We are looking for a Windows engineer to join us in developing cutting-edge cybersecurity projects.



Do what you love

As a Windows engineer, you will be dealing with:

Developing user-mode applications and complex Windows Drivers
Designing and developing components for the company's flagship security product
Low-Level R&D
End to End product development