Backend Software Engineer

About OLIXAt OLIX, we are at the forefront of technological advancement, tackling the infrastructure challenges posed by the rapid growth of AI. As the demand for powerful computing resources escalates, we are redefining the landscape of chip manufacturing. Our groundbreaking Optical Tensor Processing Unit (OTPU) delivers unmatched performance and energy efficiency, setting new standards for the industry and paving the way for the next economic revolution.The Role:We are seeking an Engineering Manager for our Backend Compiler team to spearhead a dynamic group of six engineers. This team will focus on developing and optimizing our OTPU compiler backend, collaborating closely with frontend compiler, architecture, and ASIC teams for agile hardware-software co-design. Your leadership will ensure that our hardware performance is maximized while meeting production-quality standards.The ideal candidate will possess extensive experience in engineering management, driving exceptional results for both customers and the business. You will leverage your technical acumen and proven ability to cultivate high-performing teams that thrive in a collaborative, fast-paced environment.

About OLIXAt OLIX, we are at the forefront of a technological revolution. As AI technology evolves at an unprecedented rate, we face a significant infrastructure challenge. The old hardware paradigms are no longer sufficient to meet the skyrocketing demands of the industry. Our solution, the Optical Tensor Processing Unit (OTPU), is poised to redefine the standards of performance and energy efficiency, paving the way for the next century's economic advancements.The Role:We are seeking an Engineering Manager for our Frontend Compiler team. In this pivotal role, you will lead a dynamic group of six engineers, overseeing the frontend of our OTPU compiler stack. Your responsibilities will span from machine learning framework ingestion to MLIR-based intermediate representation (IR) design and its transformation. Collaborating closely with backend compiler teams, architecture, and customer integration teams, you will ensure that our frontend choices lead to a superior customer experience and optimal hardware performance.As an experienced engineering manager, you will harness your technical acumen and proven leadership skills to cultivate an exceptional team focused on achieving tangible customer and business outcomes. Your ability to foster tightly-knit collaboration across various disciplines will be crucial in driving our projects forward efficiently.

About OLIXAt OLIX, we are at the forefront of revolutionizing AI technology. As the demand for AI continues to skyrocket, the existing infrastructure is struggling to keep pace. Our innovative Optical Tensor Processing Unit (OTPU) is set to redefine performance and energy efficiency, paving the way for groundbreaking advancements in AI hardware.The RoleWe are seeking experienced Senior Compiler Engineers to join our dynamic team focused on developing the machine learning backend (compiler, runtime, and debugger) for our state-of-the-art OPTUs. You will play a crucial role in integrating major ML frameworks such as PyTorch, TensorFlow, JAX, and MXNet with our custom low-level kernel drivers. Your mission will be to ensure optimum performance for a diverse ecosystem of large AI models, collaborating closely with hardware and modeling teams to navigate device trade-offs.Key ResponsibilitiesProject Ownership: Take charge of and deliver projects within your team's roadmap that are critical to achieving impactful technical and business objectives for OLIX.Architect & Build: Design and implement the compiler, runtime, and debugger for PyTorch, TensorFlow, JAX, and MXNet tailored for our custom hardware.Optimize Performance: Utilize advanced optimization techniques (layout, fusion, scheduling, tiling) to eliminate bottlenecks and elevate throughput.Mentor & Uphold Standards: Conduct code reviews, guide peers, and promote best practices in ML backend and performance engineering within your team.Guide Team Direction: Stay ahead of emerging trends in GPU, AI accelerators, and optical computing; propose and prototype innovative solutions.QualificationsA minimum of 5 years of experience in software engineering, predominantly in C/C++ programming.In-depth knowledge of ML framework internals, compiler design, low-level programming, and optimization strategies.Extensive experience optimizing deep learning models using TensorFlow, PyTorch, or JAX.Proficiency in multiple tools and methodologies for compiler development and performance enhancement.

About OLIXAt OLIX, we are at the forefront of a technology revolution. The rapid growth of AI has unveiled a significant infrastructure gap, and traditional hardware designs are no longer sufficient to meet the soaring demand. Our innovative Optical Tensor Processing Unit (OTPU) is set to redefine the standards for performance and energy efficiency, paving the way for the future of computing.Role OverviewAs the Director of Software Engineering for Compiler & Architecture, you will lead a dynamic team focused on advancing our OTPU architecture. Your role will involve collaboration across various teams to translate technical innovations into tangible performance enhancements for our customers. We seek a visionary leader who possesses profound technical expertise and the ability to cultivate a high-performing engineering culture.Key ResponsibilitiesEstablish and communicate a clear vision for the Compiler and Architecture organization, overseeing all aspects of compiler development and performance modeling.Lead and develop a high-performing team, fostering a culture of ownership and accountability among managers and engineers.Define and uphold standards of technical excellence, establishing architectural principles and review processes that drive quality.Collaborate closely with hardware teams to shape ML inference strategies, making informed investment decisions on technology direction.Translate the company's strategic objectives into actionable priorities that enhance customer satisfaction and business success.Foster a productive and innovative work environment that balances speed and operational efficiency.

About the Position Join our dynamic Tools and Compilers group at Jane Street as a research intern! We are seeking exceptional PhD and master's students who possess remarkable research experience in programming languages, compilers, verification, and related fields. At Jane Street, our Compilers team is dedicated to enhancing OCaml, a critical component of our expanding technology stack, in collaboration with the broader OCaml community. Our focus spans various facets of the compiler, with the goal of simplifying the process for developers to articulate their ideas in OCaml, boosting the performance of generated code, and optimizing the OCaml compiler itself for improved speed and usability. Over the years, we have enriched the type system, introduced innovative language features, and re-engineered the optimizer from the ground up, incorporating feedback-directed optimization. Additionally, we work on enhancing the surrounding toolchain, developing tools for profiling, debugging, documentation, and build automation. Much of our work is open-source, and we strive to contribute to the mainstream OCaml compiler as much as possible. During the application process, we will collaborate with you to identify a project that resonates with your research expertise and interests. Areas we are keen to explore include: Type systems that track locality and uniqueness Superoptimization Compiler testing and validation Throughout your internship, you will partner with mentors on a project for approximately 10-12 weeks. This experience will immerse you in our daily use of OCaml, providing exposure to the libraries and tools integral to our internal systems. You will gain insights into the diverse challenges we tackle every day and have the opportunity to apply cutting-edge research to an actively developed production codebase. Additionally, you will have access to our educational resources, attend guest speaker events, and participate in social gatherings, allowing you to experience what it's like to work at Jane Street full time.

Join Our Team!At Plum, we are revolutionizing how people save and invest. Our mission is to empower individuals to grow their wealth for life, whether they are saving for their first home or enjoying retirement. Since our inception in 2016, over 2 million users across 10 European countries have saved more than £2 billion with our innovative automation and AI technology. We've been recognized with awards from esteemed organizations like Deloitte and Finder, reflecting our commitment to excellence.We are a passionate team of over 200 Plumsters working collaboratively across Europe, and we are eager to welcome more talented individuals to help us achieve our vision.Your RoleAs a Senior Backend Engineer at Plum, you will play a crucial role in shaping our technology and product offerings. We seek engineers who are not only technically adept but also understand the importance of delivering outstanding products to our customers.

About Our TeamJoin our innovative AI Platform team at realtimeboardglobal, where we are at the forefront of Miro’s AI-powered product vision. We are dedicated to developing the internal platform, tools, and APIs that empower Miro’s product teams to integrate and scale AI applications seamlessly. Our mission is to create a robust and adaptable technical foundation for AI innovation, enabling our teams to work efficiently, innovate responsibly, and deliver exceptional AI features to our users.Your RoleAs a Senior Backend Engineer within our AI Platform team, you will play a pivotal role in constructing and enhancing the core infrastructure that powers AI across Miro. You will establish the technical groundwork for how we develop, deploy, and manage AI/ML capabilities, serving tens of millions of users as we transition into an increasingly intelligent product. You will design internal tools that allow teams to experiment with and release AI features swiftly and responsibly, as well as manage data pipelines for AI applications. This is a unique opportunity to influence how AI is developed and embraced company-wide.

Role overview Spotify seeks a Backend Engineer for the Release team in London. This position focuses on managing releases for backend services, ensuring deployments and integrations run smoothly. The goal is to maintain a stable and scalable infrastructure that supports Spotify’s global reach. What you will do Coordinate backend releases by working with engineering, operations, and product teams. Support improvements to infrastructure and deployment processes to enhance reliability and performance. Contribute to the backend platform powering Spotify for millions of users worldwide. Location This role is based in London.

Join Socure as a Staff Backend Engineer focusing on RiskOS, where you'll be at the forefront of developing cutting-edge backend solutions that drive our risk management platform. Collaborate with cross-functional teams to enhance system scalability, reliability, and performance, shaping the future of identity verification.

Join Our Mission to Empower UK’s Small Businesses At Funding Circle, we are dedicated to supporting small businesses, the backbone of our economy. Our innovative platform leverages data to provide them with the funding they need in mere minutes, revolutionizing the way loans are serviced.Our culture blends the dynamic energy of a fintech startup with the stability of a public enterprise, allowing Circlers to take ownership and create impactful change.We pride ourselves on being a high-performing team that lifts each other up, fostering a collaborative environment where we challenge and support one another. Together, we achieve more and build better solutions.The impact is significant: Our platform generated £7.2bn for the UK economy last year Join us on a mission that truly matters![Check Our Impact Report] | [View Our Trustpilot]The Role London (Hybrid) | 2 days in the office | Competitive Salary + BenefitsWe are seeking an experienced Senior Engineer to join our Collections, Recovery & Litigation (CRL) and Investor Management (IM) team.In this role, you will enhance and maintain systems designed to simplify the loan servicing process for our Funding Circle Borrowers and manage investor data effectively, ensuring smooth investor relations and access to investment information.Lead initiatives that address challenges faced by our internal Collections and Recoveries teams, enhancing the experience for businesses in distress.Collaborate closely with teams utilizing investor data, understanding their workflows, obstacles, and forming solutions to alleviate them.Automate manual processes across Engineering and Operations, improving efficiency.Demonstrate a passion for building innovative solutions while also being comfortable navigating an existing codebase.Thrive in complex problem domains, utilizing straightforward software systems to address them.

At Spotify, we are on a mission to revolutionize the way creators and listeners engage with long-form storytelling through our Audiobooks initiative. Our objective is to create a seamless ecosystem for audiobook content, facilitating smooth transfers from publishers to listeners. This includes building the robust systems necessary for content ingestion, processing, and efficient delivery across our rapidly expanding global catalog. We are seeking a talented Senior Backend Engineer to join a dynamic and impactful team within the Audiobooks Pipeline sector. This team's primary responsibility is to design and scale systems that handle the ingestion, processing, and transformation of audiobook and eBook content, metadata, and royalties, ensuring that listeners receive the right content with utmost efficiency and quality. While this role encompasses full-stack responsibilities, the emphasis will be on backend and data-centric development. We are looking for an individual who thrives in uncertain environments, is passionate about learning, and is excited to tackle complex challenges across the tech stack.

Join Aircall, a revolutionary unicorn in the AI-powered customer communications sphere, trusted by over 22,000 companies globally to enhance revenue, expedite issue resolution, and empower customer-facing teams. We are transforming the landscape of customer communications by integrating voice, SMS, WhatsApp, and AI into a unified workspace.Our growth is driven by a straightforward principle: to enable teams to work smarter, not harder. Our AI Voice Agent automates routine calls, while AI Assist simplifies post-call tasks, and AI Assist Pro provides real-time insights, allowing individuals to excel in their roles. This synergy results in increased revenue, quicker resolutions, and scalable teams.Headquartered in Paris, with a solid presence in North America anchored in Seattle, Aircall also has teams in vibrant cities such as Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our product is beloved by customers, and we are rapidly scaling, supported by top-tier investors and continuous AI advancements across multiple product lines.At Aircall, you'll become part of a dynamic company. We are ambitious, focused on product development, and execution-oriented, with a clear impact, swift decision-making, and genuine growth opportunities.Our Work Culture at Aircall: We prioritize customer satisfaction, leverage data for decision-making, and are dedicated to delivering significant outcomes. We cherish ownership, continuous improvement, and thoughtful agility. If you thrive in a collaborative, fast-paced environment where trust and impact are essential, you will thrive here.Position Overview:As a Senior Backend Software Engineer, you will take charge of designing, developing, deploying, and maintaining essential features that enhance customer value on our voice platform.You will be expected to advocate for best practices, mentor team members, and contribute to the broader Engineering community as part of your daily responsibilities.Quality, excellence, and agility are at the core of our delivery process, and you will play a pivotal role in elevating these standards.Utilizing a diverse array of backend technologies tailored to specific needs, all hosted on AWS, we create resilient services that deliver added value on top of voice while fully integrating with our customers' critical business tools (CRM, Helpdesk, E-Commerce, etc.).

Join xAI as a Backend Engineer, where you will play a vital role in building robust production systems that support grok.com and our API. We are looking for a highly motivated individual with expertise in scalable infrastructure and a passion for problem-solving. Your experience with Rust or C++, along with your ability to design and maintain distributed systems, will be crucial as you contribute directly to our mission of advancing AI technologies. Strong communication skills and a commitment to excellence are essential in our collaborative environment.

Pelago stands at the forefront of virtual healthcare, specializing in Substance Use Management. Our comprehensive program offers personalized guidance, support, and treatment for individuals aiming to overcome challenges related to tobacco, alcohol, and opioid use. We cater to a diverse spectrum of substance use, from unhealthy habits to active disorders, ensuring that each member receives tailored care that aligns with their health, habits, genetics, and personal objectives. Our array of virtual services encompasses educational resources, cognitive behavioral therapy (CBT), and comprehensive medication-assisted treatment (MAT). Pelago empowers employers and health plans to provide accessible and effective solutions for substance misuse. Having successfully partnered with hundreds of employers and health plans, we have positively impacted over 750,000 lives. After recently securing our Series C funding with over $151 million raised from premier global investors, we invite passionate individuals to join our mission of transforming health outcomes.About Pelago Engineering:Our engineering team is composed of empowered, outcome-focused problem solvers who collaborate closely with product, design, and clinical teams to enhance member outcomes at scale.As AI reshapes the software development landscape, we are proactively refining our development processes to prioritize system design and impactful decision-making over rote implementation.How We Work:Outcome-driven: Engineers tackle substantial problems rather than merely building features. Success is evaluated based on learning, impact, and outcomes—not just speed.AI-native: We leverage AI throughout the software development lifecycle to expedite implementation, testing, and reviews, allowing engineers to concentrate on intent definition, behavior validation, and system resilience design.High autonomy, high accountability: Teams enjoy significant ownership of their domains, with autonomy translating to responsibility for quality, safety, and results.Cross-functional collaboration: Engineers work synergistically with Product, Design, Data, and Clinical teams, sharing responsibilities for discovery, experimentation, and delivery.Quality and safety are paramount: Our work is conducted within a regulated domain that directly impacts members, making reliability, observability, and correctness top priorities.What You’ll Do:Instead of traditional task lists, you will take full ownership of significant problem spaces from discovery through to delivery.

TL;DRDeducta is a rapidly expanding startup catering to some of the globe's most prestigious enterprises. With strong funding, we are committed to addressing today's most significant business challenges.We are seeking a Senior Backend Engineer who will play a pivotal role in the design, development, and upkeep of our core systems.In this role, your key responsibilities will include:Creating and sustaining high-performance, low-latency APIs for enterprise-level data processing systems.Delivering exceptional code promptly. Location: London, UK. Our office is situated near London Bridge, and we prioritize in-person collaboration. Compensation: The total compensation for this position begins at £150,000. Visa Sponsorship: We are willing to sponsor a visa for the ideal candidate to join our team. What is Deducta?Deducta is a leading data intelligence platform for global corporations. We provide unparalleled clarity into mission-critical data for some of the world's largest and most intricate organizations, starting with spend data.We are at the forefront of significant business transformations. Our partners leverage Deducta to achieve impactful results at remarkable speeds.‍What is the Role?We process vast datasets containing essential enterprise information from diverse sources and formats, structuring it effectively. Our system utilizes cutting-edge LLMs to tackle this challenge with unmatched precision and at previously unimaginable scales.As a Senior Backend Engineer, you will be responsible for designing, developing, and maintaining the foundational architecture of our platform as it expands.Your contributions will include:Designing, constructing, and maintaining data ingestion and processing engines capable of supporting mission-critical operations for the largest firms globally.Developing and sustaining ultra-fast, high-volume, and well-documented APIs to facilitate these systems.Driving business growth through a blend of creativity and experimentation to enhance our product, alongside proactive problem-solving for our clients.Working closely with both technical and non-technical team members to comprehend our customers' challenges and create solutions that address them.Success in this role means:Leading development initiatives from concept to production.Consistently driving enhancements and new features. Who will be the right fit?We are in search of a technically outstanding engineer who excels in a role that offers autonomy and ownership.You might be a great fit if you possess…Strong experience in object-oriented programming within cloud environments (e.g. AWS, GCP, or Azure), with .NET experience considered a plus.Familiarity with SOLID principles, domain-driven design, and Clean Architecture methodologies.A passion for...

Role overview Wise seeks an Engineering Lead to direct backend development for its Business Expense Management products in London. The position centers on building systems that can scale as demand grows and operations become more complex. Leadership and technical guidance will play a key role as Wise continues to expand its business offerings. What you will do Supervise backend engineering for Business Expense Management solutions Lead and mentor a team of backend engineers Collaborate with other groups to deliver updates and new features Encourage high standards for code quality, reliability, and scalability

Join Spotify as a Senior Backend Engineer - Subscriptions and play a pivotal role in enhancing our subscription services.In this position, you will collaborate with cross-functional teams to design and implement scalable backend systems, ensuring seamless integration and exceptional user experiences.

Join V7 LabsAt V7 Labs, we're revolutionizing the AI landscape by creating platforms that empower individuals to achieve peak performance with unmatched efficiency. Our goal is to convert human expertise into reliable AI, streamlining complex processes to be quicker, smarter, and more precise. We are experiencing rapid growth, supported by top investors and AI visionaries, including the creators behind Transformers and Gemini.Your RoleAs a Product Engineer, you will contribute to V7 Go, a platform designed to equip legal, finance, insurance, and accounting sectors with a customizable no-code AI agent toolkit. This tool focuses on harnessing multi-modal data to produce verifiable outputs while ensuring transparency in AI logic for accuracy and compliance.V7 Go integrates the latest models, including GPT-5, Claude 4.1, and Gemini 2.5, ensuring optimal accuracy and performance. Check out the V7 Go keynote for more insights into our innovative solutions.Team Dynamics and ImpactYou will report directly to Chris, our Engineering Manager, and collaborate within the Go Engineering team.Working alongside a dedicated team of up to 7 professionals, you will take on significant responsibilities encompassing coding, testing, planning, and analysis.You will have the autonomy to establish your own objectives, strategies, and metrics, emphasizing impactful outcomes rather than mere task completion.We value proactive engineers who take ownership of their work, demonstrating initiative in problem-solving and collaboration.Your Day-to-Day ResponsibilitiesFacilitating the application of foundational models to scale multi-modal data.Enhancing our platform to effectively manage complex multi-tenant usage patterns.Developing a comprehensive suite of APIs to support both our internal systems and customer-facing products.Delivering production-ready updates multiple times daily, collaborating closely with Product and Design teams to address customer needs.Candidate ProfileExperience in functional programming is essential. Familiarity with Elixir is advantageous, but languages such as Scala, GoLang, Node.js, Haskell, Clojure, and F# are also welcomed.Strong problem-solving skills and a proactive attitude towards challenges.

Join the Future of Identity with Socure!At Socure, we are revolutionizing the identity verification landscape, establishing a trust infrastructure that safeguards the digital economy. Our mission is to verify 100% of legitimate identities in real-time, proactively preventing fraud before it occurs. Our work addresses complex challenges, impacting businesses, governments, and millions of individuals globally every day.We seek passionate individuals ready to take on significant responsibilities. If you thrive in a fast-paced environment, possess critical thinking skills, and approach challenges with an ownership mindset, you’ll fit right in. If predictability is what you seek, this might not be the role for you. However, if you're eager to help shape the future of identity with a team that holds itself to the highest standards, keep reading.As a Senior Backend Engineer, you will be a critical player in our product-focused teams, designing and building scalable systems that have a meaningful impact. You will engage directly with customers to enhance satisfaction and drive continuous improvements across our product offerings.In this role, you will lead the design and implementation of distributed systems, take ownership of essential non-functional requirements such as scalability, security, and reliability, and mentor fellow engineers while remaining actively involved in development. Your expertise will be vital throughout the entire software development lifecycle, from architecture and implementation to testing, documentation, and production support.This position is ideal for backend engineers who are passionate about building robust systems using Golang, excel in a product-driven environment, and want to influence technology at scale.Key Responsibilities:Design, develop, test, and debug scalable backend services within distributed systems.Deliver on key non-functional requirements, including scalability, availability, performance, and security.Develop and maintain comprehensive tests (unit, integration, functional) to ensure high coverage and reliability.Contribute to and produce technical documentation for knowledge sharing and collaboration.Break down complex projects into actionable tasks and guide teams in their execution.