Senior Software Engineer, Query Execution

Join the MongoDB Server Query team and contribute to the development of an exceptional distributed open-source query engine. Our team is pivotal in enhancing the user experience and optimizing data processing performance. We manage the complete lifecycle of queries in the MongoDB Query Language—ranging from parsing and optimization to plan selection and execution, including geospatial search and update subsystems. As our global team expands rapidly, we have established a significant presence in North America across the US and Canada, including cities like New York and Toronto, and in Europe, with locations in Dublin, Germany, France, the Netherlands, the UK, Bulgaria, Spain, and Italy. We offer both office-based and remote work options, ensuring project alignment with convenient working hours across different time zones. We face numerous challenging problems that directly impact users across transactional, time-series, and analytical workloads. We seek your expertise in designing and building the core components of a distributed, flexible schema document database. This position is specifically for candidates located in Dublin, fitting our hybrid working model.

Join MongoDB, a leader in the database market, as we revolutionize the way developers create and manage applications. Our distributed systems support mission-critical services for thousands of customers worldwide.We are seeking a skilled Software Engineer to become part of our Cloud Core Alerts Platform team. You will be instrumental in designing scalable, fault-tolerant, and highly available systems that can process millions of events and alerts in real-time.This role is based in Dublin, where we embrace a hybrid working model.Our domain includes:Alert Streaming Systems: Real-time alerting pipelines using Apache Flink and Amazon Kinesis, delivering critical insights for MongoDB Atlas customers.Event Systems: SOA-based event platforms utilizing gRPC and streaming architectures to efficiently manage the MongoDB activity feed at scale.Communication Systems: Distributed services that ensure reliable delivery of alert notifications across multiple channels (email, SMS, Slack, PagerDuty).Third-Party Integrations: Secure management of customer credentials and seamless integration with external observability providers, ensuring encryption both at rest and in transit.Cross-team Collaboration: Working closely with the broader Customer Observability teams to provide unified telemetry and monitoring experiences.What you'll do:Design and develop distributed systems capable of processing millions of events per second while maintaining high availability and low latency.Lead projects from design to production, ensuring scalability, observability, and operational excellence.Enhance our streaming alerting and eventing platforms to improve reliability, throughput, and the overall developer experience.Collaborate with cross-functional teams to integrate alerting, event, and communication services into the broader customer observability ecosystem.Create secure, multi-tenant integrations with third-party providers, handling sensitive customer credentials with care.Promote best practices in distributed systems design, focusing on resilience, scalability, and fault tolerance.Mentor and guide fellow engineers, sharing expertise in distributed architectures and streaming technologies.

Role Overview Tenable, Inc. is hiring a Senior Software Engineer for the Dublin office. This role focuses on building software that strengthens cybersecurity and helps defend against emerging threats. The team values practical solutions and welcomes new ideas that move the company forward. What You Will Do Design and develop software to address cybersecurity challenges Work closely with other engineers to deliver reliable, secure products Contribute technical expertise and creative problem-solving to team projects Work Environment This position is based in Tenable's Dublin office. The engineering team collaborates regularly and values clear communication. Contributions have a direct effect on the company's products and mission.

Join Pinterest as a Software Engineer II, where you'll be part of a dynamic team dedicated to shaping the future of visual discovery. In this role, you will design, develop, and maintain high-quality software solutions that enhance user experiences. Collaborate with cross-functional teams to deliver innovative features that align with our mission of bringing everyone the inspiration to create a life they love.

Join our innovative team as a Senior Software Engineer at MongoDB in Dublin. We are seeking a talented individual who excels in designing and implementing robust software solutions. You will collaborate with cross-functional teams to develop high-quality applications and contribute to all phases of the software development lifecycle. This role offers a unique opportunity to work on exciting projects and leverage cutting-edge technology in a dynamic environment.

Join Arista Networks as a Software Engineer in our Engineering Productivity team. In this role, you will be instrumental in enhancing the software development processes and tools that empower our engineering teams. Your innovative ideas and technical skills will contribute to the efficiency and effectiveness of our software development life cycle.

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.

CarGurus has built a reputation as a trusted automotive marketplace, helping people navigate car buying and selling with confidence. The company’s platform supports millions of monthly visitors and thousands of dealerships, offering tools for selling, financing, purchasing, and delivery. With a foundation in transparency and a culture that values kindness, collaboration, and innovation, CarGurus encourages employees to grow their careers and contribute to ongoing evolution in the automotive space. The International team in Dublin is looking for a Software Development Engineer II. This role centers on product initiatives for the Canadian and UK markets and provides an opportunity to influence the culture of a growing office. Role overview This position covers the full software development lifecycle, spanning both frontend and backend work. Software Development Engineers at CarGurus work closely with Engineering and Product teams to develop solutions and address complex challenges for dealer-facing products. What you will do Build new full-stack features for dealer products from the ground up Integrate and enhance existing services using React, TypeScript, and Java Implement integrations with third-party APIs and partners Engineers in this role take ownership of projects from start to finish, collaborating with teammates and product partners to deliver results for international markets. Automotive industry experience is not required; the team values strong engineering skills and a drive to create new solutions.

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.

Why Choose PlayStation?At PlayStation, we pride ourselves on being not only the premier destination for gaming but also a remarkable workplace. As a global frontrunner in the entertainment industry, we develop an iconic range of products and services, including PlayStation®5, PlayStation®4, PlayStation®VR, PlayStation®Plus, and award-winning titles from PlayStation Studios.We are committed to fostering an inclusive atmosphere that empowers our employees and celebrates diversity. We invite individuals who are passionate about innovation, technology, and gaming to explore our career opportunities and become part of our expanding global family.PlayStation operates as a division of Sony Interactive Entertainment, a wholly-owned subsidiary of Sony Group Corporation.The Lead Principal Software Engineer will collaborate across various teams including Product Management, Architecture, Engineering, Hosting, and Operations. This role demands extensive technical knowledge, creativity, industry insight, and strong communication skills. You will leverage your technological expertise to drive future innovations on our platforms.In this capacity, you will play a critical role in architecting large-scale commerce systems on the Sony PlayStation Network Platform. Your contributions will adhere to industry best practices, facilitating highly available, active-active, and scalable services.You will engage in product roadmap discussions, pinpointing essential areas for enhancement and integrating these objectives into both current and future development strategies.

Semperis is known for fostering a workplace where employees can grow and succeed together. The company has been recognized on the Inc. 5000 list of America's fastest-growing cybersecurity companies and has earned multiple awards for its positive culture and employee experience. Role overview The Platform Group at Semperis is looking for a Junior Software Engineer based in Dublin, Ireland. This position centers on designing and developing core infrastructure that supports enterprise security and identity products. Collaboration and a commitment to technical excellence are essential in this role. Key responsibilities Design and build shared platform components that improve scalability, reliability, and maintainability across several product teams. Contribute to the architecture of distributed systems using microservices and event-driven patterns for large-scale enterprise requirements. Oversee backend services throughout their lifecycle, focusing on code quality, performance, and operational efficiency. Collaborate with product engineers, DevOps, and architects to define platform features and establish technical standards. Take part in code reviews, pair programming, and provide technical guidance to teammates. Assist with initiatives that enhance developer productivity, system observability, and platform resilience. Participate in architectural discussions and help advance backend development best practices within the organization. Examine system performance and data patterns to spot optimization opportunities and guide future platform improvements. Requirements Minimum of 1 year of professional experience in software engineering, focusing on backend development. Practical experience with C# and .NET Core, including knowledge of modern framework features and performance tuning. Team-oriented mindset with a willingness to learn and contribute in a collaborative environment.

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.

Join Our Innovative Database Experience (DBX) TeamThe Database Experience team is dedicated to creating the libraries and tools that empower developers in their daily work with MongoDB. Our goal is to enhance developer adoption, satisfaction, and retention by providing a dependable and enjoyable interface.We are actively seeking a skilled engineer to join our PHP team based in Dublin. You will collaborate with a team of three engineers to optimize and drive the adoption of MongoDB within the PHP community.This role supports a hybrid working model for candidates located in Dublin.Your ResponsibilitiesMaintain and enhance the MongoDB PHP Extension.Collaborate with the libmongoc team to architect APIs utilized by the PHP driver.Engage with PHP core developers to stay informed on updates in the PHP language.Assist our Developer Relations, Documentation, and Education teams in generating high-quality resources for PHP developers.Pursue speaking and writing opportunities to actively engage with the PHP community.Are You the Right Fit?You thrive on developing libraries that enable developers to build and deploy applications more efficiently.You believe developers deserve superior tools for database interaction.You champion testing and agile software development practices.You are passionate about Open Source and committed to giving back to the community.You enjoy working within a small, distributed team across Ireland, France, Germany, and the Netherlands.Required Qualifications5+ years of experience in PHP development.3+ years of experience managing PHP extensions.Strong understanding of relational and non-relational database systems.Familiarity with testing methodologies and static analysis.Excellent English communication skills, both written and verbal.Preferred QualificationsExperience contributing to the PHP project.Proficiency with build tools such as autotools and make.Hands-on experience with MongoDB and its document model.Success MetricsWithin three months, you will effectively contribute to daily tasks, including bug fixes, feature implementations, and thorough code reviews.Within six months, you will influence the roadmap and lead the design of new features.

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.

About MannaAt Manna, we are revolutionizing delivery services by utilizing the skies.Our mission is bold yet straightforward: to provide fast, eco-friendly, and safe suburban deliveries. We develop our own aviation-grade drones that transport food, beverages, groceries, and more from local vendors directly to customers' doors within minutes.Our team is characterized by a commitment to making a difference, a focus on safety, and a belief that the best solutions arise from collaborative teamwork where everyone can be their authentic selves. We operate with speed, passion, and an unwavering desire to improve in all endeavors.If you are eager to create groundbreaking technology that has a tangible impact on the world (and enjoy your work in the process), you’ll thrive at Manna.Welcome to Manna — where we are delivering the future.Role PurposeAs the Lead Software Engineer for the Aircraft team, you will spearhead the technical strategy for onboard and embedded aircraft systems. You will establish long-term architectural direction, oversee complex multi-project deliveries, and mentor senior engineers throughout the broader software organization.This position is perfect for someone who excels in both deep technical work in embedded/robotics software and high-level system design, standards, and team development.Key ResponsibilitiesDefine the architecture for aircraft onboard software and associated firmware.Establish standards for reliability, performance, and scalability across aircraft systems.Contribute to architectural decisions impacting multiple teams (e.g., Aircraft ↔ Airspace ↔ QA).Lead design reviews for essential components, ensuring reliable deployment in safety-critical settings.Oversee roadmap execution while balancing immediate operational requirements with long-term system sustainability.Manage risk, rollout strategies, incident analysis, and ongoing enhancement for aircraft software.Collaborate closely with Hardware, Autonomy, Operations, and Aviation stakeholders.Mentor senior engineers and strengthen technical leadership within the team.Provide daily technical leadership and coaching to software engineers.Assist in recruitment and onboarding to expand team capabilities.

Vertex Sigma Software is on the lookout for a skilled Quality Resident Engineer - Automotive Liaison to become a vital link between our engineering and manufacturing teams and our valued clients in the automotive industry. The ideal candidate will play a crucial role in maintaining product quality and reliability through robust communication and collaboration with stakeholders throughout the development and production phases.In this dynamic role, your responsibilities will include:Acting as the primary point of contact between the client and internal teams, ensuring transparent communication of quality requirements and expectations.Assessing production processes and quality plans to verify they align with customer specifications and industry standards.Conducting on-site quality evaluations and inspections, delivering immediate feedback and guidance to manufacturing teams.Assisting in resolving quality-related issues through root cause analysis and corrective actions.Working closely with engineering and design teams to identify, analyze, and address potential quality risks throughout the product lifecycle.Supporting client visits and audits by providing necessary documentation and reports on quality performance.Implementing and sustaining quality assurance processes to guarantee compliance with ISO and other relevant standards.Generating and presenting quality performance metrics to stakeholders, suggesting improvements when necessary.Engaging in continuous improvement initiatives to boost product quality and operational efficiency.

At Klaviyo, we celebrate the diverse backgrounds, experiences, and perspectives that each member, affectionately known as a Klaviyo, brings to our vibrant workplace. We believe in providing every individual with a fair opportunity for success and value the unique experiences beyond traditional job qualifications. If you feel you closely align with this description but don't meet every requirement, we encourage you to apply. Curious about life at Klaviyo? Visit klaviyo.com/careers to explore how we empower creators to shape their own destinies.Team Overview:The Amplify Engineering team is dedicated to building cutting-edge internal tools, platforms, and AI-driven automation that enhance the efficiency and scalability of Klaviyo as we expand. We collaborate across various departments, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to address real operational challenges with innovative software solutions.Our projects encompass internal applications, third-party integrations, interactive dashboards, CMS integrations, and robust AI systems that automate repetitive tasks, deliver timely information, and assist teams in making informed decisions. We thrive on tight feedback loops with our internal customers, enabling us to ship rapidly, learn continuously, and witness the tangible impact of our efforts on speeding up deals, resolving tickets promptly, and facilitating smoother launches.This position is tailored for lead engineers who are passionate about transforming real-world challenges into reliable, scalable solutions. The work you will do is highly visible and directly influences how thousands of Klaviyos accomplish their daily tasks.How You’ll Make an Impact:As part of the Amplify team, you will be instrumental in creating the internal platforms, automation, and AI systems that drive the daily operations of Klaviyos. As a Lead Software Engineer on Amplify, your responsibilities will include:Providing technical leadership and guidance for a suite of Amplify systems, including internal web applications, APIs, data pipelines, and AI workflows utilized by Sales, Marketing, Customer Service & Success, R&D, and Finance teams. You will play a crucial role in ensuring these systems are reliable, scalable, secure, and easy to evolve.Formulating...

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

Why Join PlayStation?At PlayStation, we are not just the ultimate destination for gaming; we also pride ourselves on being an exceptional workplace. As a global leader in the entertainment industry, we produce an impressive array of products and services, including the PlayStation®5, PlayStation®4, PlayStation®VR, and an extensive library of acclaimed software titles from PlayStation Studios.We are dedicated to fostering an inclusive environment that empowers our employees and celebrates diversity. We invite passionate individuals with a curiosity for innovation and technology to explore our open positions and become part of our dynamic global team.The PlayStation brand is a part of Sony Interactive Entertainment, a wholly-owned subsidiary of Sony Group Corporation.About the RoleIn the role of Senior Staff Software Engineer, you will lead a dedicated team focused on enhancing the kernel security of PlayStation devices. This is a rare opportunity to influence the security architecture of our flagship gaming systems!Join our security team in Dublin and collaborate with our global console security group. You will refine low-level code and explore innovative avenues to engage with the open-source community. Your expertise will help ensure that PlayStation platforms remain the premier destination for gaming!