Senior Backend Engineer - Recommendation Systems (Contractor)

We are seeking a skilled Java and Scala Developer to join our innovative team. The ideal candidate will possess a Master’s degree in Computer Science or a related field and have a robust background in software development. You should have at least three years of hands-on experience in software development and a minimum of two years working with distributed systems.Your expertise should include design and implementation of distributed systems, data pipelining, and familiarity with machine learning algorithms. You will be expected to design large-scale applications utilizing various software design patterns and object-oriented design principles.Proficiency in Java, Scala, and Python is essential, alongside experience in distributed computing frameworks like Hadoop, Spark, or cloud technologies. You should also have experience in parallel processing using CUDA, threads, or MPI.We value individuals who have a strong grasp of design patterns, UML diagrams, and data modeling for large-scale analytic systems. Your role will involve research and analysis to transform massive amounts of raw data into structured datasets that maintain contextual integrity, thereby facilitating the development of new products.Familiarity with data warehousing and distributed/parallel processing of large datasets is required. Experience with modern development methodologies such as Agile, Scrum, and SDLC is essential.The ideal candidate will thrive in a research-oriented, fast-paced, and highly technical environment. You should be a quick thinker, a fast learner, and possess excellent communication and interpersonal skills.

Join our dynamic team as a Senior Java/J2EE Architect in Palo Alto! We are seeking an innovative and experienced professional with at least 10 years of expertise in Java and J2EE technologies. You will play a pivotal role in designing and implementing cutting-edge software solutions, collaborating with cross-functional teams, and driving architectural decisions that align with our business goals.

Rivian and Volkswagen Group Technologies brings together two established automotive companies focused on shaping the next era of electric mobility. This partnership combines expertise in advanced operating systems, zonal controllers, cloud solutions, and connectivity to address the evolving needs of electric vehicles. The goal: build smarter, more connected, and sustainable vehicles for a global audience. Role overview The Senior Android Developer will design and develop the core Android application used throughout the Rivian and Volkswagen Group Technologies ecosystem. This platform supports key initiatives such as intelligent energy management and integrated digital assistants. The work directly impacts how users experience electric vehicles, aiming to reduce range anxiety and make sustainable transportation accessible and appealing. What you will do Architect and build a large-scale, consumer-facing Android application central to the company’s strategy Create user experiences that support global adoption of electric vehicles Contribute to the Software-Defined Vehicle (SDV) infrastructure, helping to scale solutions across a major joint venture Establish Android architectural foundations for high-volume, first-of-its-kind products Impact This position plays a key part in shaping software that will reach millions of users and influence the future of mobility worldwide. The work will help define how electric vehicles are experienced and adopted, both now and in the years ahead.

Join our innovative team at Mashgin, where we are transforming the landscape of AI technology! As an AI Developer, you will work on cutting-edge projects that leverage artificial intelligence to enhance user experiences and improve operational efficiencies. We are looking for talented individuals who are passionate about AI and eager to contribute to our mission of making technology more accessible and intuitive.

Ahrefs is seeking a talented backend developer who possesses a profound understanding of networks, distributed systems, and operating system fundamentals, along with a passion for creating simple yet efficient architectural designs. Our backend infrastructure is predominantly built using OCaml, complemented by some C++ code.In this challenging role, you will work daily with 25 petabytes of live data, utilizing OCaml and Linux.Explore more about Ahrefs OCaml

About xAIAt xAI, we are committed to developing advanced AI systems that accurately interpret the universe and support humanity's quest for knowledge. Our agile team is comprised of highly motivated individuals who prioritize engineering excellence. We welcome those who relish challenges and are driven by curiosity. Operating with a flat organizational structure, we encourage hands-on contributions from all team members to fulfill our mission. Initiative and a track record of excellence are recognized and rewarded. Strong communication skills are essential for effectively sharing knowledge within our team.About the RoleThe Imagine Product team is at the forefront of transforming AI-enhanced media experiences for Grok users globally. In this pivotal role, you will architect and scale robust, high-performance systems that facilitate engaging, multi-modal media interactions—utilizing state-of-the-art AI for the seamless generation, processing, and delivery of a variety of media formats including images, videos, and audio. Your contributions will enhance real-time user experiences that captivate millions, turning sophisticated multimodal models into production-ready features. If you are a passionate problem-solver with a keen interest in AI and media technologies, and are eager to create scalable solutions that influence the future of consumer AI, this is your chance to make a significant impact.

About UsAt Newcode.ai, we are dedicated to revolutionizing the integration of AI into everyday business operations. In just a few months, we have transformed our vision into reality, crafting products that our clients genuinely appreciate. By joining our dynamic and ambitious team, you will not only influence the future of AI but also play a pivotal role in shaping it.Your RoleAs a Senior Backend Engineer at Newcode.ai, you will be responsible for designing and developing the essential systems that underpin our AI solutions. You will engage with cutting-edge technologies, influence our architectural decisions, and make an immediate impact from day one.We are seeking a seasoned backend engineer with significant experience in creating and maintaining robust API solutions using FastAPI. In this critical role, you will work collaboratively with frontend developers to build a stellar Python backend, allowing you to design, assess, and launch innovative products that empower professionals globally in their daily tasks. You will take ownership of the entire technology stack, enjoying the freedom to make a meaningful difference.

Join Artech Information Systems LLC as a Test Automation Developer, where you'll be instrumental in creating robust automated testing frameworks for our cutting-edge applications across iOS, Android, and Web platforms. You will collaborate with cross-functional teams to ensure the highest quality of our software products, enhance user experience, and contribute to continuous integration and delivery processes.

Join our dynamic team at Artech Information Systems LLC as a Test Automation Developer, where you will leverage your Python expertise to develop innovative automated testing solutions. Collaborate with cross-functional teams to enhance product quality and streamline testing processes. If you are passionate about technology and thrive in a fast-paced environment, we want to hear from you!

Join the Revolution at ALSO.At ALSO, a pioneering electric mobility company born from Rivian's vision, we are a dedicated team of innovators and builders committed to revolutionizing the way people commute. We specialize in designing innovative and affordable small electric vehicles (EVs) that tackle the mobility challenges of today and tomorrow. Our mission is to inspire a shift from traditional transportation to our efficient and delightful e-bikes, significantly reducing reliance on conventional cars and trucks.Be part of a transformative phase in our journey! As an early member of our dynamic team, you will be instrumental in crafting the digital experience for our cutting-edge connected e-bike product. This is your chance to make a mark in a fast-paced startup environment, where your input will shape critical user experiences. You will collaborate closely with a passionate team to create a premium customer journey from purchase to ride, and enjoy the freedom to design scalable systems while growing with our evolving company.

Join our dynamic team at Sonsoft Inc. as a Hadoop Developer! We are looking for an enthusiastic and skilled individual to help us leverage big data technologies to drive our business forward. You will be responsible for designing, developing, and maintaining scalable data processing solutions using Hadoop and its ecosystem tools.

Join our dynamic team at StemXpert as a Senior Oracle APEX Developer. In this pivotal role, you will leverage your expertise in Oracle APEX to design, develop, and implement high-quality applications that enhance business processes. Your innovative solutions will help drive our initiatives forward in a collaborative and fast-paced environment.

Rubrik, Inc. is hiring a Staff Software Developer focused on Enterprise AI at its Palo Alto, CA office. This position centers on designing and building advanced AI solutions for business operations and customer-facing products. Role overview This role involves developing AI-driven tools and systems that improve efficiency and support customer needs. The work directly influences the direction and impact of Rubrik’s AI initiatives. Key responsibilities Lead the creation and implementation of enterprise-scale AI solutions Collaborate with teams to identify opportunities for AI-driven improvements Contribute technical expertise to shape Rubrik’s future AI capabilities Location This role is based in Palo Alto, CA.

Join our dynamic team at Sonsoft Inc. as a Hadoop Developer! In this role, you will be responsible for designing and implementing scalable data processing systems using Hadoop technologies. You will collaborate with data scientists and analysts to optimize data workflows and ensure the integrity and availability of large datasets.

Rivian and Volkswagen Group Technologies brings together two major automotive companies to advance electric vehicle software. The partnership focuses on operating systems, zonal controllers, cloud platforms, and seamless connectivity, aiming to raise the bar for software-defined vehicles. The team draws on combined strengths in connectivity, artificial intelligence, and security to create smarter, more sustainable mobility solutions. Role overview The Senior Fullstack Software Engineer for Developer Productivity joins a team dedicated to building tools and features that streamline the developer experience. The group’s mission centers on enabling engineers to work efficiently and focus on high-impact tasks, using AI-powered solutions to remove friction from daily workflows. This role involves designing and implementing improvements across the entire software development lifecycle. The position supports both Vehicle Software (from code to car) and Cloud teams, ensuring that development processes are smooth and reliable. Regular collaboration with DevOps and Infrastructure teams is key, helping high-velocity teams deliver quality software quickly. Location Palo Alto, California

About xAIAt xAI, we strive to develop artificial intelligence systems that genuinely comprehend the universe, enhancing humanity's quest for knowledge. Our team, though compact, possesses immense motivation and a commitment to engineering excellence. We are looking for individuals who enjoy pushing their limits and have an insatiable curiosity. Operating under a flat organizational structure, we encourage all employees to engage hands-on in our mission, where leadership is awarded to those who exhibit initiative and consistently deliver outstanding results. Strong work ethic and prioritization skills are essential, as is the ability to communicate effectively and share knowledge clearly with teammates.Role OverviewWe are seeking a talented individual adept in image and video generation and editing.

About UsAt Newcode.ai, we are dedicated to transforming the way organizations harness AI in their daily operations. Within just a few months, we have transitioned from concept to reality, creating products that our clients truly appreciate. Join our dynamic and ambitious team, where your contributions will not only shape the future of AI but also define it.Your RoleAs a Senior Fullstack Developer at Newcode.ai, you will be instrumental in designing and developing the foundational systems that support the AI solutions our clients depend on. You will engage hands-on with cutting-edge technologies, significantly influence our architectural decisions, and create a lasting impact from your first day.You will work throughout our advanced tech stack—from backend logic to user-friendly interfaces—enjoying the flexibility to influence every aspect of the product. We value initiative and empower our team members to make significant, enduring contributions.

Join Pivotal as a Business Development Representative and play a crucial role in driving our growth and enhancing our market presence. You will engage with potential clients, understand their needs, and showcase how our innovative solutions can help them succeed. This is an exciting opportunity to contribute to a dynamic team and develop your career in business development.

At PsiQuantum, we are dedicated to realizing the potential of quantum computing by developing the first practical quantum computers that can achieve the breakthroughs anticipated in this exciting field. Since our inception in 2016, we have been singularly focused on building and deploying million-qubit, fault-tolerant quantum systems.Our cutting-edge quantum computers leverage the principles of quantum mechanics to tackle problems that are beyond the reach of even the most sophisticated supercomputers and AI systems. The transformative power of quantum technology is expected to revolutionize industries such as energy, pharmaceuticals, finance, agriculture, transportation, and materials science.Our innovative architecture is grounded in silicon photonics, allowing us to utilize advanced semiconductor manufacturing processes in collaboration with leading partners like GlobalFoundries. This enables us to produce our systems at scale while benefiting from the inherent advantages of photonics, such as immunity to heat and electromagnetic interference, as well as seamless integration with existing cooling and fiber-optic technologies.In 2024, PsiQuantum announced government-supported initiatives to establish our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois, marking a significant step towards scaling quantum computing in a way that is both economically and strategically viable.Additionally, we are committed to developing the algorithms and software essential for unlocking the commercial value of quantum systems. Our teams collaborate with Fortune 500 leaders like Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical to create quantum solutions that will have a real-world impact.Quantum computing is not merely an extension of classical computing; it represents a paradigm shift that opens pathways to address challenges that are insurmountable through conventional means. The potential is immense, and we have a clear roadmap to transform this potential into reality.Join us on this revolutionary journey.