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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 a world leader in Artificial Intelligence, High-Performance Computing, and Visualization. Our invention, the GPU, has transformed modern computing and is at the heart of our products and services. We set the standard in groundbreaking technology, making our company one of the technology industrys most desirable employers. We are seeking a talented and passionate DevOps Engineer to join our team.
If you excel at creative problem-solving, thrive in a fast-paced environment, and are eager to collaborate with distributed teams, we want to hear from you!
What Youll Be Doing:
Design, build, and maintain robust HPC and cloud infrastructure utilizing state-of-the-art technologies and cutting-edge hardware.
Automate the deployment, configuration, and management of network and compute resources, including bare metal servers, network switches, and VMs.
Develop and streamline CI/CD pipelines to enable continuous integration and delivery for our R&D engineering teams.
Optimize infrastructure for availability, performance, observability, security, scalability, and cost-efficiency. Collaborate closely with software development teams to integrate automated testing and quality assurance into deployment workflows.
Troubleshoot and resolve issues spanning infrastructure, networking, hardware, and software environments. Stay current with industry trends and incorporate best practices in DevOps and infrastructure management.

Are you a Software Engineer with a passion for building the rock-solid infrastructure that empowers developers? Our Infrastructure team is looking for a talented engineer to solve complex DevOps challenges through code in what is fundamentally a software development positionone where the product you build is the engineering ecosystem itself.
You will be responsible for engineering the CI/CD pipelines, automation, and tooling that our entire R&D organization relies on. We need a developer with a strong Computer Science foundation who can write clean, efficient code and understands that the best infrastructure is treated as a software product. If you are ready to apply your development skills to the DevOps domain and contribute to innovative AI-based initiatives, this is the role for you.
What youll be doing:
Develop and Scale our CI/CD Platform: Engineer and enhance our CI/CD pipelines using Jenkins, Gerrit, Python, Groovy, and Bash, focusing on reliability, speed, and scalability.
Automate Core Processes: Design, code, and maintain robust automation for our Linux kernel and software package build systems using tools like Docker and Ansible.
Build Developer Tools: As part of a dedicated team, you will develop critical engineering tools that improve developer velocity and code quality, and contribute to innovative AI solutions aimed at enhancing developer productivity.
Own the Full Lifecycle: Take full ownership of your software and systems, from design and coding to testing, deployment, and operation.

Join our E2E team as a Senior Software Engineer and lead the development of powerful software systems for our companys Data Center environments. This is a chance to join a distributed team, craft the future of our companys software platforms used in various fields like Machine Learning, Cloud, Storage, and High-Performance Computing.
What youll be doing:
Craft and design long-term architectures, ensuring scalability, maintainability, and technical innovation
Architect and design algorithms to establish quality standards for future data center technologies, ensuring scalability and high performance
Collaborate with cross-functional teams, including product managers, architects, networking engineers, and research teams, to define strategic technical targets and deliver impactful solutions.

our company's Network Management Group develops the core software applications that manage and monitor NVLink and InfiniBand networks. Our applications handle critical tasks such as routing configuration, access control, resource management, and network error detection and recovery. These applications power the world's most advanced supercomputers and form the backbone of infrastructure for leading AI training workloads.
We seek an experienced Software Engineer eager to contribute to system design, implementation, and automatic tests.
What you'll be doing:
Design, develop, and optimize a user-space server application, written in C++, responsible for handling large-scale InfiniBand/NVLink networks.
Collaborate with multiple teams to develop new features/improvements in our multi-functional environment.
Improve and maintain automatic test systems written in Python.

our company DOCA team is seeking a highly motivated and hardworking experienced Engineer with hands-on capability technical experience, to design and implementation the SDK of the next generation Data Processing Unit Software, with a wide range of features related to cybersecurity and embedded systems.
This position offers the opportunity to have a real impact in a dynamic, technology-focused company impacting data centers across the world. At our company, We're united in our quest to transform the way Smart Adapters are used.
What you'll be doing:
Work with some of the best engineers to design and implement DOCA SDK and infrastructure
Responsibility for the E2E development of DOCA SDK features
Design and develop SDK libraries for networking, storage, cyber security, and high-performance computing
Work with big companies to solve real issues that require innovation and customer orientation.

the omnichannel outcomes platform for the open internet, driving full-funnel results for marketers across premium media. With a focus on meaningful business outcomes for branding and performance objectives, the combined company ensures value is driven with every media dollar by leveraging predictive AI technology to connect quality media, beautiful brand creative, and context-driven addressability and measurement. One of the most scaled advertising platforms on the open internet, directly partnered with more than 10,000 publishers and 20,000 advertisers globally. The company is headquartered in New York, with a global team of nearly 1,800 people in 36 countries.

About the opportunity
We are looking for a seasoned engineer who combines strong backend engineering expertise with proven experience in machine learning. You will play a critical role at the intersection of backend systems, data engineering, and ML infrastructure, building scalable platforms and algorithms that power our large-scale ML workflows. Your work will directly impact the performance, reliability, and scalability of our ML systems, from core infrastructure and model deployment to performance monitoring and KPI optimization.

What will you do?
Architect and implement efficient, scalable backend systems for high-performance ML workflows, data processing pipelines, and core infrastructure services.
Develop, adapt, and optimize ML algorithms, contributing to the platforms core ML capabilities and features.
Ensure all systems are tested, observable, and optimized, including automated unit, integration, and load testing for ML workloads.
Optimize infrastructure and algorithms for latency, throughput, and accuracy, tackling production-level challenges in distributed and GPU-enabled environments.
Collaborate closely with data scientists to implement core infrastructure features and integrate them into the ML platform.
Stay up-to-date with emerging ML frameworks, distributed systems technologies, and performance optimization techniques to maintain a cutting-edge platform.

we are seeking an innovative and experienced Senior Software Developer to join our team. This team is pioneering a new wave of application security solutions focused on identifying risks in AI-powered software. If you're passionate about software security, skilled in backend engineering, and intrigued by the intersection of AI/LLMs and security, we want you on our team.
The product scans application source code to detect embedded AI/ML models, libraries and framework, understand their behavior, and surface potential security risks; from data leakage to prompt injection vulnerabilities. This is a high-impact role that blends backend engineering with cutting-edge AI applications, helping organizations secure the next generation of software.
You're invited to meet the R&D team here!
**Work in a hybrid model: Two days from the office, three days from home**
Responsibilities:
Design and implement backend systems that scan source code, identify AI/ML components, and evaluate associated security risks.
Build intelligent detection logic to recognize large language models (LLMs), machine learning models, and custom pipelines in codebases.
Collaborate with security researchers, data scientists, and product managers to integrate AI risk models into our core platform.
Develop scalable and maintainable services in Java and Go.
Translate research prototypes into production-grade features, with attention to performance, resilience, and accuracy.
Conduct code reviews, maintain high development standards, and mentor team members.

We are looking for a senior backend engineer who is truly cross functional possesses strong engineering foundations for developing highly performant services. The ideal candidate will have a deep understanding of algorithms and Python fundamentals, as well as an understanding of the capabilities and limitations of LLMs.
They will be able to quickly collaborate with their product counterparts to iterate over new, cutting edge features and capabilities and get them to the hands of our users. Collaborating closely with product teams, they will quickly ideate, develop and deliver innovative features and capabilities to our users.
If you have the skills and experience we are looking for, we encourage you to apply for this exciting opportunity to join our team and make a significant impact on the future of AI
Role and Responsibilities:
Build the framework used to supercharge our algorithm teams to write scalable, performant algorithms
E2E ownership of production services, databases and infrastructure
Work in fast iteration loops with business/product managers to architect and deliver new products and capabilities
Drive the architectural design, including dependent services and service interactions (APIs & SDKs)
Apply judgment and experience to balance trade-offs between competing interests and optional solutions, considering profiling data to inform decisions on performance and resource utilization.
Help with coaching and mentoring team members, and maintaining high standards of software quality within the team.

we are looking for a Senior Software Engineer -Protocols to join our growing team!
This is a great opportunity to be part of one of the fastest-growing infrastructure companies in history, an organization that is in the center of the hurricane being created by the revolution in artificial intelligence.
"our company's data management vision is the future of the market."- Forbes
we are the data platform company for the AI era. We are building the enterprise software infrastructure to capture, catalog, refine, enrich, and protect massive datasets and make them available for real-time data analysis and AI training and inference. Designed from the ground up to make AI simple to deploy and manage, our company takes the cost and complexity out of deploying enterprise and AI infrastructure across data center, edge, and cloud.
Our success has been built through intense innovation, a customer-first mentality and a team of fearless company ronauts who leverage their skills & experiences to make real market impact. This is an opportunity to be a key contributor at a pivotal time in our companys growth and at a pivotal point in computing history.

we are looking for a Senior Software Engineer to join our growing team!
This is a great opportunity to be part of one of the fastest-growing infrastructure companies in history, an organization that is in the center of the hurricane being created by the revolution in artificial intelligence.
"our company's data management vision is the future of the market."- Forbes
we are the data platform company for the AI era. We are building the enterprise software infrastructure to capture, catalog, refine, enrich, and protect massive datasets and make them available for real-time data analysis and AI training and inference. Designed from the ground up to make AI simple to deploy and manage, our company takes the cost and complexity out of deploying enterprise and AI infrastructure across data center, edge, and cloud.
Our success has been built through intense innovation, a customer-first mentality and a team of fearless company ronauts who leverage their skills & experiences to make real market impact. This is an opportunity to be a key contributor at a pivotal time in our companys growth and at a pivotal point in computing history.

we are looking for a Senior Software Engineer - Data Path to join our growing team!
This is a great opportunity to be part of one of the fastest-growing infrastructure companies in history, an organization that is in the center of the hurricane being created by the revolution in artificial intelligence.
"our company's data management vision is the future of the market."- Forbes
we are the data platform company for the AI era. We are building the enterprise software infrastructure to capture, catalog, refine, enrich, and protect massive datasets and make them available for real-time data analysis and AI training and inference. Designed from the ground up to make AI simple to deploy and manage, our company takes the cost and complexity out of deploying enterprise and AI infrastructure across data center, edge, and cloud.
Our success has been built through intense innovation, a customer-first mentality and a team of fearless company ronauts who leverage their skills & experiences to make real market impact. This is an opportunity to be a key contributor at a pivotal time in our companys growth and at a pivotal point in computing history.

we are looking for a Senior Software Engineer -Protocols to join our growing team!
This is a great opportunity to be part of one of the fastest-growing infrastructure companies in history, an organization that is in the center of the hurricane being created by the revolution in artificial intelligence.
"our company's data management vision is the future of the market."- Forbes
we are the data platform company for the AI era. We are building the enterprise software infrastructure to capture, catalog, refine, enrich, and protect massive datasets and make them available for real-time data analysis and AI training and inference. Designed from the ground up to make AI simple to deploy and manage, our company takes the cost and complexity out of deploying enterprise and AI infrastructure across data center, edge, and cloud.
Our success has been built through intense innovation, a customer-first mentality and a team of fearless company ronauts who leverage their skills & experiences to make real market impact. This is an opportunity to be a key contributor at a pivotal time in our companys growth and at a pivotal point in computing history.

we are looking for a JAVA Expert to join our new product initiative in data processing and analysis infrastructure.
This is a great opportunity to be part of one of the fastest-growing infrastructure companies in history, an organization that is in the center of the hurricane being created by the revolution in artificial intelligence.
"our company's data management vision is the future of the market."
- Forbes
we are the data platform company for the AI era. We are building the enterprise software infrastructure to capture, catalog, refine, enrich, and protect massive datasets and make them available for real-time data analysis and AI training and inference. Designed from the ground up to make AI simple to deploy and manage, our company takes the cost and complexity out of deploying enterprise and AI infrastructure across data center, edge, and cloud.Our success has been built through intense innovation, a customer-first mentality and a team of fearless company ronauts who leverage their skills & experiences to make real market impact. This is an opportunity to be a key contributor at a pivotal time in our companys growth and at a pivotal point in computing history.

We're seeking an outstanding and passionate Software Engineering to join our growing R&D team.

You will work in an energetic startup environment following Agile concepts and methodologies. Joining the company at this unique and exciting stage in our growth journey creates an exceptional opportunity to take part in shaping team and technology at the forefront of Fintech and AI.

If you have more front-end or back-end orientation, don't hesitate to apply.

What you'll do:

Be responsible (together with the team members) for the platform, its up-time, architecture & scale.

Be part of building a high-scale and robust backend platform.

Work closely with company leadership, and iterate over core infrastructure.

Write high-quality and performant code following industry best practices and standards.

Experiment with new technologies, tools, and 3rd party frameworks. Utilize them to deliver state-of-the-art tech.