Senior Software Engineer - Developer Tools

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 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.

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.

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.

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.

Affinidi develops technology for data ownership and digital identity, focusing on privacy and security. The company creates tools that help both businesses and individuals manage and safeguard their data. Its decentralized digital identity solutions aim to give people meaningful control over personal information, enabling secure data exchange across industries and borders. Role overview The Senior Backend Engineer (Rust) will play a key part in building and maintaining Affinidi’s core platform. This position centers on designing and implementing backend systems that are both reliable and scalable. The work directly supports Affinidi’s mission to empower users with greater control over their data. Key responsibilities Design and develop backend components using Rust Build systems that are robust, reliable, and scalable Contribute to platform improvements that advance data privacy and user control Location Dublin, Dublin, Ireland

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 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.

About KotaKota is revolutionizing the accessibility of insurance and retirement benefits through cutting-edge software solutions. We offer the Kota Platform, the world’s first fully integrated benefits platform, and Kota Embed, our innovative embedded insurance and retirement product designed for various platforms.Our mission is to enhance the accessibility and appeal of insurance and benefits for today’s workforce.Founded in 2022, Kota has successfully secured over €20 million in funding from leading technology investors in Europe, including Eurazeo, EQT Ventures, Northzone, and Frontline, alongside notable angel investors such as Romain Huet from Stripe and David Clarke from Workday. Our investors have a rich history of supporting successful companies like Spotify, Airbnb, and Klarna.The RoleAs a Senior Product Engineer (Backend) on the Kota Embed team, you will be pivotal in developing the APIs and SDKs that facilitate embedded insurance and retirement benefits for global platforms. This role extends beyond mere coding — it encompasses designing resilient systems, addressing intricate product challenges, and creating exceptional developer experiences that our clients depend on to support their employees.You will collaborate closely with designers, engineers, the integrations team, and benefits specialists at Kota to transform concepts into robust, scalable, and secure products. Your responsibilities will encompass all aspects from technical architecture and system design to incident management and the ongoing enhancement of our developer-facing APIs and documentation.We seek a candidate who excels at the convergence of product innovation and engineering excellence — an engineer who is equally driven by understanding the “why” as much as the “how,” and who aspires to make a significant impact on the global delivery of benefits. An individual who has a passion for enhancing the developer experience.

About Our TeamAt OpenAI, our Privacy Team is dedicated to creating a secure and trustworthy environment for all users. We oversee the privacy aspects of all OpenAI products and systems that interact with user data, providing our cross-functional partners with the essential tools to ensure compliance with the highest standards of data privacy and legal obligations. Our commitment to responsible data use is fundamental to our mission of safely advancing Artificial General Intelligence (AGI) for the benefit of society.About This RoleWe are actively seeking a passionate Software Engineer who has a solid background in building data pipelines and collaborating closely with legal teams. This position is ideal for individuals who are enthusiastic about the intersection of technology, privacy, and legal compliance. You will be responsible for designing, architecting, and developing backend systems that manage some of the most sensitive data at OpenAI.This role is based in Dublin, Ireland, and we operate on a hybrid work model, requiring three days in the office each week. We also provide relocation assistance to new hires.Key Responsibilities:Design, implement, and maintain backend systems that drive privacy and data compliance features across our API products and consumer applications.Collaborate with legal advisors and fellow engineers to address court orders and other legal requests, ensuring compliance with rigorous data privacy standards.Identify automation opportunities and develop tools that empower other teams to streamline tasks involving customer data.Establish and enforce data handling policies and procedures that align with legal and ethical standards, safeguarding user data integrity and confidentiality.You Will Excel in This Role If You:Have experience in creating data pipelines, particularly suited for legal processes and investigative workflows.Can effectively translate legal requirements into technical specifications and communicate these solutions to a non-technical audience.Are committed to taking ownership of challenges from start to finish and are willing to acquire any additional knowledge needed to succeed.Possess the skills to develop tools that enhance your workflow and that of your peers, especially when existing solutions fall short.Have a strong passion for user experience and take pride in developing products that uphold user privacy.

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 KotaKota is revolutionizing the accessibility of insurance and retirement benefits, making them as user-friendly as modern software. Our flagship solutions include the Kota Platform, the world's first fully integrated benefits platform, and Kota Embed, our innovative embedded insurance and retirement product tailored for various platforms.Our mission is to enhance the accessibility and enjoyment of insurance and benefits for today's workforce.Founded in 2022, Kota has successfully raised over €20 million from some of Europe’s leading technology investors, including Eurazeo, EQT Ventures, Northzone, and Frontline. Notable angel investors include Romain Huet, formerly of Stripe and now at OpenAI, and David Clarke, formerly of Workday. Our investors have a proven track record, having backed or built companies like Spotify, Airbnb, Klarna, Truelayer, Snapchat, Workday, Personio, Workvivo, Pointy, Workable, and Wayflyer, among others.The RoleAs a Backend Product Engineer on the Kota Embed team, you will play a crucial role in designing and developing the APIs and SDKs that power our embedded insurance and retirement benefits solutions globally. This position presents an excellent opportunity for a skilled backend engineer eager to advance into a senior role through increased ownership, cross-functional collaboration, and refining both product and engineering skills.Your ResponsibilitiesEnhance Core APIs and SDKs: Create new features and refine existing functionalities that developers will love.Hands-On Learning: Collaborate closely with experienced engineers on architecture, design, and code reviews to accelerate your professional growth.Elevate Developer Experience: Simplify workflows for customers and partners by transforming complex processes into intuitive APIs.Collaborate Across Teams: Work alongside product managers, designers, and integration teams to deliver impactful solutions.Increase Project Ownership: Gradually take charge of projects, engage in incident response, and foster a culture of blameless learning.