Senior Software Engineer - Backend & Infrastructure (f/m/d)

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.

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.

Join Contentful as a Senior Backend Engineer and play a pivotal role in our AI Platform team. You will be responsible for designing, developing, and maintaining scalable backend services that power our innovative solutions. This is an exciting opportunity to work with cutting-edge technologies in a collaborative environment.

Join MongoDB as a Senior Security Software Engineer focused on enhancing our Infrastructure Security. You will play a crucial role in protecting our systems while working alongside talented individuals in a dynamic environment.

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

About the CompanyAffinidi is an innovative technology firm committed to revolutionizing data ownership for individuals and businesses alike. We equip our users with the tools to control and manage their data securely, ensuring privacy while encompassing the entirety of their digital identity.Our cutting-edge technology facilitates decentralized digital identity solutions, reinforcing our belief that everyone deserves the right to own and control their data. We are dedicated to building a trusted ecosystem of digital credentials that enable seamless and secure data exchange across various industries and international borders. About the Role:We are seeking a solution-driven Senior Backend Engineer (Rust) with proven expertise in designing and implementing robust backend systems. In this pivotal role, you will contribute to our mission by developing scalable solutions that enhance our decentralized identity platform.

Telnyx develops technology to enable global connectivity. The company operates a private, multi-cloud IP network and delivers edge connectivity through APIs. With a focus on automating manual processes and addressing real-world challenges, Telnyx continues to invest in technology and team growth, backed by strong financial performance. Role overview The Senior Java Software Engineer joins the backend team managing a distributed, highly available data pipeline. This platform powers essential Telnyx products such as Voice, Messaging, and Wireless. The system runs on the Telnyx private backbone and is designed to be cloud-agnostic, processing thousands of messages per second. The engineering team oversees more than 30 microservices, all containerized with Docker and deployed across multiple regions in the U.S. and Europe. Deep expertise in Java Core is especially valued for this position. Locations Sao Paulo, Brazil Austin, Texas Argentina Dublin, Ireland What you will do Design, build, and maintain backend systems using Java Develop and support distributed, cloud-agnostic data pipelines Contribute to a microservices architecture with Docker Help scale systems that handle large volumes of messages Requirements Senior-level experience with Java Core Strong understanding of distributed systems Background in microservices and Docker Comfort working with a geographically distributed team Learn more Telnyx Private Network Edge Connectivity

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.

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.

AECOM is seeking a Senior Engineer to join the Development Infrastructure team in Dublin. This position plays a key role in delivering infrastructure projects that support community growth and urban development. Role overview This role involves leading a team of engineers and working closely with stakeholders to ensure successful project outcomes. The Senior Engineer will take responsibility for guiding projects from planning through completion, focusing on both technical quality and effective collaboration. What you will do Lead and mentor a team of engineers working on development infrastructure projects Coordinate with stakeholders at every stage of the project lifecycle Oversee project execution to ensure technical requirements and quality standards are met Apply technical expertise to address project challenges and deliver effective solutions

Join the MongoDB Database Experience team, a vibrant and diverse group dedicated to enhancing our users' ability to manage MongoDB at a global scale. We develop cutting-edge tools for MongoDB Atlas, our database-as-a-service solution, which is our fastest growing product, enabling users to deploy fault-tolerant, globally distributed MongoDB clusters in mere minutes. We are on the lookout for a Senior Software Engineer to become a vital member of our Developer Tools Team within the Database Experience division. This team is key in creating tools that empower users to interact seamlessly with their data and monitor the health and performance of their MongoDB deployments. Whether through desktop applications like MongoDB Compass or web-based interfaces such as Atlas Data Explorer, the Developer Tools Team plays a crucial role in user engagement. This role requires participation in a 24/7 on-call rotation to maintain business continuity and ensure prompt incident response. This position can be fulfilled from our Dublin office or remotely within Ireland.

Seapoint is developing a financial hub designed for European startups and scale-ups. The platform brings together payroll, expenses, invoicing, and reporting within a single business account, using AI to simplify financial operations for founders. Founded by Sean Mullaney, former European CIO at Stripe, Seapoint’s team includes alumni from Stripe, Wise, Wayflyer, Nubank, and Tide. The company has raised $10 million from Frontline Ventures and is currently in private beta, collaborating with VC-backed startups to improve financial insight and automation. Many European startups face the challenge of managing multiple financial tools, often losing out on interest and spending excessive time on manual tasks. Seapoint’s platform aims to automate these processes, allowing founders to focus on growing their businesses. Role overview The Senior Infrastructure Engineer leads the design, development, and scaling of the systems behind Seapoint’s financial platform. This role focuses on building and maintaining infrastructure that supports a multi-tenant financial product. Key areas include CI/CD, observability, database reliability, and cloud architecture. Decisions in this position directly influence how Seapoint deploys, monitors, and scales its platform for real-world financial operations. What you will do Cloud infrastructure: Design and manage AWS environments, covering compute, networking, security, and cost optimization. The stack uses TypeScript/Bun and PostgreSQL. Maintain secure, reliable, and cost-effective infrastructure as Seapoint grows. Developer experience: Build tools and CI/CD pipelines to help a small engineering team ship confidently. Emphasize fast builds, reliable previews, and zero-downtime deployments. Observability and reliability: Maintain monitoring, alerting, and incident response systems. Create dashboards, traces, and alerts to identify issues like payment failures or integration problems before they affect customers. Database and data infrastructure: Optimize PostgreSQL for multi-tenant financial workloads. Focus on connection pooling, query performance, backup strategies, and safe migrations to ensure data integrity. Security and compliance: Build infrastructure to support financial compliance, including secrets management, access controls, audit logging, and network security. Ensure the platform meets high security standards for financial services. Requirements 7+ years of professional experience in infrastructure, DevOps, or platform engineering Location: Dublin, County Dublin, Ireland

Join our dynamic team as a Senior Engineer specializing in Infrastructure Platforms. You will play a crucial role in shaping our infrastructure, enhancing our scalability and performance. Collaborate with cross-functional teams to design and implement robust systems that support our growing user base.As a Senior Engineer, you will be expected to leverage your extensive experience in software engineering, systems architecture, and cloud technologies to drive innovation within our infrastructure.

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.

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.

About the CompanyAffinidi is a pioneering technology firm focused on revolutionizing data ownership. Our mission is to empower individuals and businesses with autonomy over their data, providing a holistic approach to identity management that prioritizes privacy and security.Our innovative technology facilitates decentralized digital identity solutions. We advocate for the fundamental right of everyone to own and control their data. Our commitment lies in building a trustworthy ecosystem for digital credentials, enabling secure data and service exchanges across various industries and borders.About the Role: We are seeking a solution-driven Senior Backend Engineer with proven experience in Rust. You will play a pivotal role in developing backend systems that underpin our decentralized identity solutions, contributing to a future where individuals have full control over their data.

Affinidi develops technology that puts data ownership back in the hands of users and organizations. The company’s products use decentralized digital identity to help people and businesses manage their information securely and privately. By building tools that enable trusted exchange of digital credentials, Affinidi supports secure data sharing across industries and borders. Role overview The Senior Backend Engineer (Rust) will join the engineering team in Dublin. This position focuses on designing and building scalable backend systems that power Affinidi’s digital identity offerings. The work emphasizes backend performance, reliability, and maintainability, with Rust as the primary development language. What you will do Design and implement backend systems to support digital identity products Write and maintain code in Rust, ensuring quality and performance Collaborate with other engineers to solve backend challenges and improve system reliability Requirements Strong hands-on experience with Rust in a production environment Background in building scalable and reliable backend systems Solution-oriented mindset when approaching engineering problems Work location: Dublin, Ireland

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.