Staff Software Engineer, Backend - Websites Fundamentals

Join Squarespace as our inaugural Staff Engineer for the newly established Websites Fundamentals platform team in Dublin. In this pivotal role, you will serve as the primary technical leader, laying the foundation for the platform that supports our product ecosystem. You will tackle complex, low-level architectural challenges that enhance technical efficiency and enable our engineering teams to operate with exceptional speed.Your responsibilities will include designing and implementing high-performance, scalable solutions that will support our future growth. Collaborating with senior technical leaders, you will define a sustainable long-term technical roadmap for the Platform team, ensuring that all engineering decisions reflect our commitment to enduring ownership.As a strategist, you will also remain hands-on, demonstrating best practices by writing clean, resilient code for our most intricate foundational needs. Your success will be gauged by the ease you create for your peers. By reinforcing our core platform, you will establish the abstractions that allow engineers to focus on innovation rather than being bogged down by complex dependencies and the intricate health of our platform.You will act as the principal technical partner for the emerging team, setting benchmarks for engineering excellence and operational rigor.This position reports directly to the Engineering Manager for Websites Applications in Dublin. This is a hybrid role, requiring you to work in our Dublin office three days a week.

Role overview The Staff Software Engineer - Backend Development at Ripple will focus on designing and building scalable backend systems in Dublin, Ireland. This position plays a central role in supporting the platform’s performance and reliability. Regular collaboration with cross-functional teams is expected. What you will do Partner with engineers and other groups to design backend architecture Develop systems that enhance platform reliability and scalability Help set technical direction for products and backend solutions Offer ideas and contribute code to address evolving customer needs

Join our dynamic team at Toast as a Senior Backend Software Engineer, where you will play a pivotal role in designing and developing innovative backend solutions. You will collaborate with cross-functional teams to create efficient and scalable systems that enhance our platform’s performance and user experience.Your expertise in backend technologies will drive the development of robust software applications, ensuring high availability and performance. Be part of a culture that values innovation, teamwork, and continuous learning.

Semperis develops enterprise security and identity solutions, with a focus on creating an environment where employees feel valued and supported. The company has been recognized by Inc. 5000 as one of America’s fastest-growing cybersecurity companies and is listed as a DUNS 100 Top Startup to Work For. Semperis has also received the Inc. Best Workplace award multiple times. Role overview The Platform Group at Semperis is seeking a Senior Backend Software Engineer based in Dublin, Ireland. This position centers on designing and building shared infrastructure components that underpin the company’s security and identity products. The role blends hands-on engineering with teamwork across product, DevOps, and architecture groups. What you will do Design and implement shared platform components to support scalability, reliability, and maintainability for several product teams. Architect distributed systems using microservices and event-driven approaches for enterprise-scale workloads. Own key backend services throughout their lifecycle, focusing on code quality, performance, and operational standards. Collaborate with product engineers, DevOps, and architects to define platform features and set technical guidelines. Mentor junior engineers through code reviews, pair programming, and technical advice. Lead technical projects aimed at improving developer productivity, system observability, and platform resilience. Contribute to architectural decisions and help define backend development best practices across the company. Analyze system performance and data trends to identify optimization opportunities and guide future platform investments. Requirements Minimum 7 years of professional experience in software engineering, with a strong emphasis on backend development. Expertise in C# and .NET Core, including familiarity with recent framework enhancements and performance features.

At Ripple, we are pioneering a future where value is transferred as effortlessly as information. Our innovative crypto solutions empower financial institutions, businesses, governments, and developers to enhance the global financial system, promoting economic fairness and opportunity for individuals worldwide. Join a dynamic team where you can elevate your career and expand your skill set alongside supportive colleagues.If you are eager to make a significant impact and unlock remarkable career advancement prospects, we invite you to join us in creating tangible value for the world.In 2025, Ripple acquired GTreasury, marking an important step into the expansive corporate finance sector valued in the trillions.With over 40 years of expertise, GTreasury supports some of the largest and most sophisticated companies globally. By integrating its treasury command center into Ripple’s technology stack, we enable businesses to manage and optimize liquidity in real-time, across both traditional and digital assets.Become a part of our mission to revolutionize corporate treasury and the infrastructure that powers the Internet of Value.We are looking for a forward-thinking Staff Software Engineer who is passionate about developing a world-class platform in collaboration with a talented team. Your role will focus on driving technical excellence in application development, from design through implementation and maintenance.Key Responsibilities:Collaborate with architects and product managers to design, estimate, and implement innovative application features across front-end, server-side, and database tiers.Utilize Azure services to develop powerful, scalable, and resilient cloud-based solutions.Enhance software applications and manage delivery pipelines, feature flags, ensuring smooth integration and deployment.Conduct thorough unit, integration, and non-functional (performance, security) testing to ensure production readiness of our software.Employ observability tools and logging to troubleshoot and resolve issues across development, testing, and production environments.Stay updated on technology trends, explore new technologies, engage with tech communities, mentor fellow engineers, and lead technical design and code evaluations.Continuously seek improvements in team operations, processes, methodologies, and technology choices, aiming for excellence in every practice.

Join Toast, Inc. as a Staff Software Engineer in the FinTech sector, where you will be instrumental in building innovative financial solutions to empower businesses. We are looking for a skilled engineer with a passion for technology and a commitment to excellence. You'll collaborate with cross-functional teams to deliver robust software solutions that enhance our financial services platform.

This hybrid role is based in Dublin, Ireland (Full relocation provided). At Toast, we are dedicated to empowering restaurants and local businesses to thrive in a digital world. Our innovative technology solutions assist business owners in operating efficiently, boosting sales, engaging customers, and fostering employee satisfaction. Our Mission Toast is proud to be the leading hospitality platform in the United States, and we are now setting our sights on global expansion. As a member of our International team, you will help build the foundational systems necessary for launching Toast into new markets. Join our high-impact engineering team that takes ownership of solving complex technical challenges in a dynamic setting. We seek leaders who excel in technical capabilities while maintaining a strong product focus to foster continuous growth for both our team and platform. Your Role (Responsibilities) Lead intricate projects within a collaborative cross-functional environment. Coordinate our backend services to facilitate internationalization across both restaurant and cloud software. Design, build, deploy, and maintain robust and scalable systems that are essential for our customers’ success. Refine our technical strategies for data management to support our international initiatives. Provide mentorship and technical guidance to fellow team members, spearheading technical discussions and promoting best engineering practices. Engage directly with pilot customers (occasionally on-site) to ensure seamless delivery and operations. Champion best coding practices, elevating standards for yourself, your team, and the organization. Utilize cutting-edge AI tools to enhance your development workflow, boost productivity, and contribute to a culture of innovation and efficiency across the team.

Join our innovative team at Arista Networks as a Backend Software Engineer, where you will play a crucial role in developing and optimizing our cutting-edge CloudVision platform. We are looking for passionate individuals who thrive in a collaborative environment and are eager to tackle complex challenges.Your responsibilities will include designing scalable backend systems, collaborating with cross-functional teams, and driving the implementation of best practices in software development.

Join Toast, Inc. as a Staff Software Engineer and take the lead on innovative projects that shape the future of our technology. In this role, you will work collaboratively with cross-functional teams to design, develop, and implement high-quality software solutions. Your expertise will help drive technical direction and mentor junior engineers, fostering a culture of continuous improvement.

Join Anthropic as a Staff Software Engineer specializing in Inference. In this pivotal role, you will lead projects that enhance our AI systems, contributing to the development of safe and alignable AI technologies. You will collaborate with a dynamic team of engineers and researchers, utilizing cutting-edge tools and methodologies to push the boundaries of AI capabilities.

Toast, Inc. is looking for a Staff Software Engineer to join the Team Agent group in Dublin. This role centers on building and improving software that directly impacts the customer experience. Collaboration is a key part of the work, with regular interaction across engineering and product teams to support Toast’s broader technical goals. Key responsibilities Design and develop software solutions for the Team Agent division Work alongside engineers, product managers, and other stakeholders to deliver features Create systems that address customer needs and align with business objectives Contribute to ongoing engineering projects and support team progress Location This position is based in Dublin.

Join Toast, a pioneering technology company dedicated to empowering the restaurant industry through innovative software solutions. As a Staff Software Engineer focused on international operations, you will play a crucial role in shaping our global product offerings. Your expertise will help enhance the performance and reliability of our platforms, ensuring that we meet the diverse needs of our international clients.

Join our dynamic team at Arista Networks, a leader in cloud networking solutions. We're seeking a talented Backend Software Engineer to contribute to our innovative CloudVision platform. In this role, you will develop and optimize backend systems that support our cutting-edge cloud technologies.

Join our innovative team at Toast, Inc. as a Staff Software Engineer, focusing on building cutting-edge solutions that enhance our agent team's capabilities. In this role, you will leverage your technical expertise to develop robust software, collaborate with cross-functional teams, and drive the implementation of best practices in software engineering.

Join the innovative team at MongoDB as a Staff Software Engineer specializing in Server Ingress Security. In this pivotal role, you will be responsible for designing and implementing robust security solutions that protect our server infrastructure from unauthorized access and potential threats. Your expertise will play a crucial part in enhancing the security posture of our applications, ensuring seamless and secure connectivity for our users.

Join Contentful as a Senior Software Engineer specializing in Backend & Infrastructure, where you will play a pivotal role in architecting robust, scalable systems that empower our clients to deliver exceptional digital experiences. You will leverage your expertise to optimize backend systems and enhance our infrastructure, ensuring seamless integration and performance.

This hybrid position is located in Dublin, Ireland, with full relocation support provided.At Toast, we pioneer technology that empowers restaurants and local businesses to thrive in the digital era. Our innovative solutions help business owners optimize operations, boost sales, engage customers effectively, and ensure employee satisfaction.What Drives UsHaving established ourselves as the premier hospitality platform in the U.S., Toast is now setting its global ambitions. As a member of our International team, you'll play a vital role in developing core systems to introduce Toast to new markets. Join a high-impact engineering team that tackles complex technical challenges in a dynamic environment. We seek leaders who combine technical excellence with a strong product vision to facilitate ongoing growth for our team and platform.Daily ResponsibilitiesLead intricate projects in a collaborative, cross-functional environment.Manage backend services to support internationalization across both restaurant software and cloud solutions.Design, build, deploy, and maintain resilient and scalable systems that are crucial to our customers’ success.Refine our technical approach to data management in alignment with our international strategy.Guide and mentor team members, leading technical discussions and fostering best engineering practices.Work closely with pilot customers, occasionally on-site, to ensure successful implementation and operations.Champion best coding practices, raising standards for yourself, your team, and the company.Utilize cutting-edge AI tools to enhance development workflows, increase productivity, and contribute to a culture of innovation.

Join Stripe as a Staff Engineer in our Production Engineering team, where you will play a critical role in building and maintaining scalable systems.As a leader in this innovative environment, you will collaborate with cross-functional teams to optimize our infrastructure and enhance the reliability of our services. You will leverage your expertise to influence product design and architecture decisions, ensuring the highest performance and availability.

This position offers flexible work arrangements: Office, Hybrid, or Remote within Ireland.We are seeking a talented Senior Software Engineer to join our dynamic Engage Product Group within the Flywheel Product Line.The Engage Product Group is dedicated to transforming HubSpot's Go-To-Market (GTM) sales teams by empowering our sales representatives with cutting-edge AI technology, enabling them to meet and exceed their targets. Our team develops, refines, and maintains advanced AI solutions that significantly enhance closed-won rates by utilizing AI to qualify inbound leads, deliver actionable insights and coaching, and create personalized demo instances for every HubSpot prospect through sophisticated multi-agent systems.In this role, you will be instrumental in constructing a reusable, reliable, and intelligent context layer for GTM AI and agents. Our objective is to centralize the storage, search, and retrieval of insights, facilitating rapid experimentation, enhancing insight quality through systematic evaluation and versioning, and equipping flagship agents and guided experiences with consistent, high-quality context.As a Senior Software Engineer, you will be a highly productive, impactful, and trusted contributor who utilizes your expertise to autonomously tackle complex projects and shape technical direction. Your primary focus will be on context for the coming months, with opportunities to collaborate across various teams and product areas as your role evolves.Key Responsibilities:Develop and deploy production code that delivers significant business and GTM outcomes.Design and implement innovative AI features, agents, and insights that enhance GTM efficiency and improve user and prospect experiences.Collaborate within a small, cross-functional team of product engineers, ML engineers, PMs, and designers.Engage with HubSpot colleagues and GTM professionals across the organization.Gain in-depth exposure to HubSpot's GTM processes.We are searching for engineers with a strong business acumen and product mindset, who thrive in addressing real GTM challenges and can navigate ambiguity with autonomy and enthusiasm.While we primarily utilize Java, we value solid programming fundamentals over specific technology experience. To learn more, check out our engineering blog.Desired Qualifications:Proven experience in developing AI products, particularly in GTM contexts, with a history of driving evaluations and innovation based on cutting-edge model advancements.Experience in building...

POS-22139This role can be Office/Hybrid/Remote based within IrelandHubSpot is leading the charge in empowering businesses through innovative AI technology, and our AI Infrastructure group is pivotal to this mission. We are on the lookout for a Staff Software Engineer who possesses a strong passion for infrastructure and enhancing developer experiences to become a vital member of our AI Serving team. This team is responsible for the end-to-end management of HubSpot’s model inference and serving infrastructure, ensuring that our AI models are deployed reliably, scaled efficiently, observed meticulously, and operated in a cost-effective manner across all hublets and environments. Moreover, this team is the home for modern Python practices at HubSpot.Our team oversees the serving frameworks and libraries that facilitate synchronous, asynchronous, and offline inference, as well as model deployment pipelines, autoscaling, and resource management for both GPU and CPU. Our roadmap is focused on enhancing the reliability and efficiency of batch inference, improving model observability, and scaling our AI infrastructure in a cost-effective manner. Additionally, we are the custodians of core Python libraries and tools across HubSpot.As a Staff Software Engineer on the AI Serving team, you will:Develop and deploy production code that directly powers AI functionalities across HubSpot, serving as a critical component for impactful user and business outcomes at scale.Lead the advancement of our model serving and inference infrastructure, enhancing reliability, scalability, and cost-efficiency.Establish the technical direction for deploying and operating ML models at scale, guiding architectural decisions, cost optimizations, and developer experience enhancements.Collaborate closely with Machine Learning Engineers, Product Software Engineers, and other Infrastructure teams to streamline model deployment and serving processes.Gain extensive insight into various HubSpot infrastructure systems by building and maintaining core Python libraries, offering an exceptional opportunity to understand HubSpot's inner workings.Work alongside HubSpotters across different functions including engineering, product, design, research, marketing, and sales, while gaining a broader understanding of how HubSpot operates as a business.Be empowered to express your authentic self and choose a work style and location that allows you to perform at your best, whether from home, in an office, or a combination of both.We are not solely seeking engineers with extensive experience; we value engineers who have demonstrated unique excellence, leadership, and the ability to elevate those around them.Our primary programming languages include Python and Java, but a variety of experiences are welcomed.