Senior Software Engineer - Developer Tools

About TelnyxAt Telnyx, we are not just envisioning the future of global connectivity—we are actively creating it. Our dedication to constructing a private, global, multi-cloud IP network empowers seamless interconnection between people, devices, and applications through innovative solutions, including hyperlocal edge technology delivered via intuitive APIs.Our aim is to revolutionize outdated systems, automate manual processes, and address real-world challenges through cutting-edge connectivity solutions. We take pride in our financial stability and profitability, which allows us to invest in pioneering technologies while nurturing an environment for continuous learning and career growth.Join us in our vision of a world where borderless connectivity drives limitless innovation. We are eager to welcome passionate individuals who are excited about contributing to an industry-leading company while enhancing their own skills and careers.The OpportunityOur AI teams are at the forefront of developing reliable, low-latency microservices using advanced, cloud-native technologies. This position is a key part of our larger AI organization, focusing on crafting the platforms, services, and tools that underpin AI-driven products—encompassing areas such as inference, embeddings, APIs, data flows, and observability.In this fast-paced role, you will prioritize reliability, performance, and usability alongside innovation. While some squads concentrate on inference pipelines and LLM tooling, others delve into foundational platforms, troubleshooting, reliability, data systems, or observability—each critical to deploying AI solutions at scale.

About SeapointSeapoint is revolutionizing financial management for European startups and scale-ups. We offer an AI-driven business account that consolidates payroll, expenses, invoice payments, and reporting into a single platform, simplifying financial operations.Founded by Sean Mullaney, former European CIO at Stripe, alongside a talented team of alumni from Stripe, Wise, Wayflyer, Nubank, and Tide, we recently secured $3M in pre-seed funding from Frontline Ventures. After nine months of dedicated development, we are now in private beta, collaborating with numerous VC-backed startups who are gaining unprecedented visibility into their financial landscapes.Our mission is clear: to bridge the gap for European startups caught between the limitations of neobanks and the complexities of traditional banking. By automating the tedious aspects of finance through AI, we empower founders to focus on what truly matters—the growth of their businesses.Discover more about our innovative solutions here.About the RoleWe are seeking an experienced AI Software Engineer to take ownership of and enhance the intelligent systems that fuel our financial platform. You will directly influence how founders manage their finances by developing AI features that enrich transaction data, automate invoice matching, and provide insightful reporting and forecasting.Key ResponsibilitiesVendor Enrichment Pipeline: Enhance our existing system that aggregates bank transactions from various sources (open banking, accounting software, email invoices) and enriches them with vendor details. This role includes improving search accuracy, normalization logic, and data integration.Invoice Management Automation: Expand the AI capabilities behind our bill payment product, which scans invoices and matches them to transactions. There is significant potential for enhancements in risk assessment, beneficiary creation, and payment automation.AI Evaluation Infrastructure: Advance our evaluation framework by utilizing a dedicated environment to test AI prompts and agents. Implement industry best practices for accurately measuring AI system performance.Feature Development: Spearhead technical discovery for AI-driven functionalities across reporting, forecasting, and other essential areas. Propose and scope innovative capabilities that enrich the financial experience for business owners, steering us towards agent-based systems.

The MongoDB Database Experience team is a dynamic and diverse group dedicated to enhancing user management of MongoDB at a global scale. We are focused on developing innovative tools for MongoDB Atlas, our rapidly growing database-as-a-service platform that enables users to deploy fault-tolerant, globally distributed MongoDB clusters in mere minutes. We are on the lookout for a Senior Software Engineer to become an integral part of our Developer Tools Team within the Database Experience department. This team is responsible for crafting tools that empower users to interact with their data and monitor the health and performance of their MongoDB deployments. Our work includes a variety of APIs and user-friendly interfaces, allowing MongoDB users to manage their stored data seamlessly, whether on desktop through MongoDB Compass or in the browser via Atlas Data Explorer. This position offers the flexibility to work from our Dublin office or remotely within Ireland.

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.

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 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.

About AnthropicAt Anthropic, we are on a mission to develop AI systems that are not only reliable and interpretable but also steerable. Our primary goal is to ensure that AI technology is safe and advantageous for all users and society at large. Our rapidly expanding team consists of dedicated researchers, engineers, policy experts, and business leaders, all working collaboratively to create beneficial AI solutions.Role OverviewAt Anthropic, we believe in the strength of collaboration. Our AI Reliability Engineering (AIRE) team plays a crucial role in maintaining the robustness of Claude, our flagship AI, ensuring it remains reliable for everyone who relies on it. We work closely with various teams within Anthropic to enhance reliability across our essential service paths—from the SDK, through our network, API layers, serving infrastructure, and accelerators, and back again. Our hands-on approach allows us to make impactful improvements during incidents and in collaborative projects.Reliability is an emergent quality that extends beyond individual teams. Our role involves taking a comprehensive view of the systems, offering a unique opportunity for dynamic, cross-functional engagement with the most critical aspects of our operations.

Squarespace is seeking an accomplished Engineering Team Manager to spearhead the Dublin division of our Help Experience team. Our mission is to empower the growth of our customers’ businesses through a cohesive support platform, while enhancing the operational efficiency of our Customer Operations division. Your contributions will directly impact over 500 advisors and 1 million customers who rely on our suite of support tools monthly. In this pivotal role, you will partner with Product and Design leaders to steer the engineering team in executing technical enhancements across our application portfolio. You will oversee the development of new applications, augment existing features, and maintain strategic clarity with stakeholders in Engineering, Data, Product, and Customer Operations. You will mentor engineers at various experience levels, articulate and implement technical strategies with cross-functional teams, and align our business objectives with customer needs as we expand our support platform into new markets and products. This is a full-time hybrid position, requiring in-office presence three days a week at our Dublin office, while reporting to the Engineering Manager based in NYC.

Join Our TeamAs an integral member of the CloudEOS team at Arista Networks, you will engage with a dynamic and talented group dedicated to developing innovative software solutions for Cloud-enabled WAN connectivity. Our team oversees the complete lifecycle of control plane, software data plane, and management platform/APIs/services.Your ResponsibilitiesYou will contribute to the creation of groundbreaking products and services that offer highly automated networks, ensuring secure connectivity across multiple global locations. In this position, you will work with diverse technologies, including the Extensible Operating System (EOS), multithreading, multicore software forwarding via DPDK, and various public cloud infrastructures such as AWS, Azure, and GCP. You will also explore areas like path selection, NFV, containers, network segmentation, virtualization, microservices architecture, CI/CD pipelines, and Terraform-based provisioning models.

Join our innovative team as an AI Software Engineer II at Dun & Bradstreet in Dublin, Ireland. In this role, you will be responsible for developing advanced AI solutions that drive business insights and enhance decision-making processes. You will collaborate with cross-functional teams to design, implement, and optimize machine learning models and algorithms. Your expertise will contribute to the creation of scalable AI applications that meet the needs of our clients.

Speechify builds text-to-speech tools that help over 50 million people convert written content, PDFs, books, Google Docs, news, and websites, into audio. Our products span iOS, Android, Mac, Chrome, and web. Recent recognition includes Chrome Extension of the Year from Google and Apple’s 2025 Design Award for Inclusivity. The company operates fully remote, with nearly 200 team members worldwide. The team includes frontend and backend engineers, AI researchers, and alumni from Stanford, Amazon, Microsoft, Google, Stripe, Vercel, and Bolt. Role overview This Software Engineer position sits within the AI team and focuses on data infrastructure and acquisition. The work centers on optimizing data collection and building large-scale, high-quality datasets to support model training. The team combines infrastructure, engineering, and research to deliver petabyte-scale data pipelines. What you will do Identify and integrate new audio data sources into the ingestion pipeline Manage and extend cloud infrastructure on Google Cloud Platform (GCP) using Terraform Collaborate with scientists to improve data quality, throughput, and cost-effectiveness for next-generation models Work with the AI team and company leadership to shape the strategic roadmap for datasets powering Speechify’s consumer and enterprise products Location This role is based in Dublin, Ireland. The team works fully remotely.

CarGurus, Inc. helps people navigate every stage of their automotive experience, from shopping to financing and delivery. Founded by a small group of developers, the company has grown over 15 years into a major automotive marketplace, serving millions of consumers and thousands of dealerships each month. The team values kindness, collaboration, and creativity, and supports ongoing career development. The International team is hiring a Principal Software Development Engineer for the Dublin office. This position leads product efforts for the Canadian and UK markets, and plays a key part in shaping the local office culture. The role covers the full software development lifecycle, with work spanning both frontend and backend systems. Collaboration with Engineering and Product teams in Dublin and the US is central to the job, especially when tackling complex dealer-focused products. What you will do Lead the design and development of new full-stack features for dealer products. Integrate and enhance existing services using React, TypeScript, and Java. Design and implement integrations with third-party APIs and partners, working with applications built on Remix. Modernize and re-architect systems to use AWS and other cloud technologies. Own projects from start to finish, working closely with engineers and product partners in both Dublin and the US. Requirements Quick to learn and adapt to new challenges. Experience collaborating with other engineers to deliver meaningful solutions. Strong technical expertise combined with business insight to help guide teams in strategic decisions.

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 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.

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...

CarGurus, listed on NASDAQ as CARG, started as a small team of developers with a focus on trust and transparency in car shopping. Over the past 15 years, the company has become one of the largest automotive marketplaces, recognized for steady profitability, innovation, and sustained growth. The mission at CarGurus is to bring the entire car-buying process online, supporting customers through every step, from selling their old car to securing financing, purchasing, and delivery. With tens of millions of visitors each month and around 30,000 dealerships using CarGurus.com, the team values collaboration, diverse perspectives, and ongoing career development. Role overview The International team is seeking a Senior Software Development Engineer for the Dublin office. This position centers on expanding CarGurus' products in the Canadian and UK markets, while also contributing to the growth of the local office culture. The role involves working throughout the entire software development lifecycle, covering both frontend and backend development. Close collaboration with engineers and product teams is essential to deliver new solutions for dealer-focused products. What you will do Build new full-stack features for dealer products from the ground up Work with React, TypeScript, and Java to integrate with existing services and enhance functionality Design and implement integrations with third-party APIs and external partners Modernize current systems by adopting cloud technologies, including AWS Projects move from concept to launch, with engineers and product partners working closely together. Automotive industry experience is not required; curiosity and strong engineering skills are most important.

CarGurus, Inc. is hiring an Engineering Manager, Software Development for its Dublin, County Dublin, Ireland office. This is a key leadership role, responsible for establishing and guiding the first engineering team in the new Dublin location. The team will focus on developing dealer-facing products for international markets, with particular attention to Canada and the UK. Role overview This position centers on building and leading a group of full stack engineers. The Engineering Manager will work closely with a Product Manager to define the team's vision, shape its culture, and set a clear strategic direction. The team will take ownership of specific product areas, developing new features and enhancing existing offerings to support CarGurus’ international growth. What you will do Recruit, mentor, and lead a new team of full stack engineers in Dublin Partner with a Product Manager to define team vision, culture, and roadmap Emphasize customer outcomes through open communication and collaboration Apply an iterative approach to both product development and team management Oversee projects and improvements for dealer products in international markets, especially Canada and the UK Coordinate closely with engineering teams in the United States What matters here Genuine interest in both engineering and leadership Proven experience building and guiding high-performing teams Dedication to a collaborative, people-first culture Automotive industry experience is not required

Join the innovative Server Ingress Security team at MongoDB, where we are transforming the ingress networking of MongoDB Server to enhance cluster security. Our team is responsible for developing the Atlas Network Protection layer, a suite of high-performance, security-critical services designed to fortify MongoDB's pre-authentication attack surface while enabling swift responses to emerging threats. We are seeking talented Senior Engineers to become founding members of this team, playing a pivotal role in our multi-year strategic roadmap. Our team fosters a strong culture of inclusivity, diversity, and collaboration. If you are passionate about working in a collaborative environment that applies security and systems engineering principles to protect a widely-used database at scale, we would love to hear from you! We are particularly interested in candidates located in Dublin for our hybrid work model.

At Klaviyo, we celebrate the diverse backgrounds, experiences, and perspectives that each Klaviyo (as we refer to ourselves) contributes to our vibrant workplace. We believe in providing equitable opportunities for success and value the unique insights each individual brings beyond conventional job qualifications. If you find yourself closely aligned with this description, we encourage you to apply. To explore more about life at Klaviyo, visit klaviyo.com/careers and discover how we empower creators to shape their own futures.Team Overview:The Amplify Engineering team is responsible for developing internal tools, platforms, and AI-driven automation that enhance the productivity and scalability of our operations as Klaviyo continues to grow. We collaborate across various departments, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to address real operational challenges with thoughtfully designed software solutions.Our projects encompass internal applications, third-party integrations, interactive dashboards, CMS integrations, and sophisticated AI systems that automate repetitive tasks, deliver timely information, and support better decision-making. We thrive on rapid feedback from our internal clients, enabling us to ship solutions quickly, learn swiftly, and witness the immediate effects of our contributions on deal acceleration, ticket resolution, and smoother product launches.This position is tailored for software engineers who are passionate about transforming real-world challenges into dependable, scalable solutions. The work you do will be highly visible, directly influencing how thousands of Klaviyos accomplish their daily tasks.How You’ll Make an Impact:The Amplify team is at the forefront of building the internal platforms, automation, and AI systems that drive our daily operations at Klaviyo. As a Software Engineer II on Amplify, you will:Design, develop, and maintain critical internal products and platforms, including web applications, APIs, data and event pipelines, and AI workflows that are essential for Sales, Marketing, Customer Service & Success, R&D, and Finance teams. You will take ownership of features and small-to-medium projects from inception through deployment and iterative improvement.