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Senior Software Engineer specializing in Fuzz Testing

antithesis

Full-time|On-site|Vienna, VA, USA

Join our dynamic team at antithesis as a Senior Software Engineer specializing in Fuzz Testing. In this pivotal role, you will be responsible for developing robust software solutions that enhance system security and reliability. You will work closely with cross-functional teams to identify vulnerabilities and implement innovative fuzzing techniques.Your expe…

Apr 4, 2026

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Immediate Opening for Performance Test Engineer

usm2

Contract|On-site|Vienna

We are seeking a talented and dedicated Performance Test Engineer to join our dynamic team at usm2. In this role, you will be responsible for ensuring the performance and scalability of our applications through rigorous testing practices. You will collaborate with developers and stakeholders to identify performance bottlenecks and provide actionable insights to enhance system efficiency.

Jul 14, 2017

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Senior Software Engineer - Data at Sportradar | Vienna

Sportradar AG

Full-time|On-site|Vienna

Sportradar AG is looking for a Senior Software Engineer with a focus on data to join the Vienna office. This position centers on building and maintaining data solutions that support the sports industry. Role overview The Senior Software Engineer - Data will design and develop systems for processing large volumes of sports data. The work involves improving data accuracy and reliability, contributing to the foundation of Sportradar's data-driven products. What you will do Develop and maintain data processing systems tailored to the needs of the sports sector Work to ensure the accuracy and reliability of collected and processed data Contribute expertise to create solutions that support innovative uses of sports data Requirements Significant experience as a software engineer working with data systems Strong motivation to solve complex data challenges Ability to deliver reliable and accurate solutions

Apr 29, 2026

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Senior Software Engineer at Sportradar | Vienna

Sportradar AG

Full-time|On-site|Vienna

Join Sportradar, a leading global provider of sports data and content, as a Senior Software Engineer. In this dynamic role, you will work on cutting-edge technologies to develop and enhance our innovative solutions for sports organizations and media companies. Your expertise will contribute to our mission of transforming the sports industry through data.

Apr 1, 2026

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Senior Software Engineer (iOS) - SDK Development

Sentry

Full-time|Hybrid|Vienna, Austria

About SentryAt Sentry, we're on a mission to revolutionize software development by enabling developers to create high-quality software more efficiently. Our performance and error monitoring tools are trusted by over 100,000 organizations, including industry leaders like Disney, Microsoft, and Atlassian.With a solid backing of over $217 million in funding, we foster a hybrid work environment that encourages collaboration and innovation. Join us in building the next generation of software monitoring tools and rediscover the joys of technology.Join Us in Shaping Mobile App MonitoringThis is not just another engineering position. As part of our Mobile SDK team, you'll help create cutting-edge tools for developers, managing over a billion events daily. We are in search of a skilled Senior iOS SDK Engineer passionate about tackling complex challenges using the latest technology.You will explore Apple's advanced technologies, including SwiftUI and modern concurrency, while developing innovative features like Session Replay and next-generation performance monitoring.Your ResponsibilitiesAs the architect of our iOS SDK, you will oversee its evolution from foundational architecture to user experience. You will be instrumental in designing scalable, high-quality APIs and setting the strategic direction for mobile at Sentry. Your expertise will guide our teams in overcoming intricate customer challenges.Why You Will Thrive HereWe seek individuals who are not only skilled but also enthusiastic about crafting elegant, user-friendly tools that other developers will love. Contribute significantly to a vital open-source project and witness the immediate effects of your efforts in our dynamic setting. You will collaborate with thoughtful and dedicated engineers committed to a culture of excellence and continuous growth.

Apr 13, 2026

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Senior Software Engineer in Sports Data at Sportradar | Vienna

Sportradar AG

Full-time|On-site|Vienna

ABOUT US:Welcome to Sportradar ad:s, where we specialize in delivering data-driven marketing and sponsorship solutions tailored for the iGaming sector. Our innovative tools and services address the unique marketing requirements of sportsbooks and media publishers globally. Picture yourself immersed in a vibrant environment filled with sports data, live statistics, virtual sports, microservices, and betting—while embracing an agile mindset and a dedication to providing outstanding value to our clients. We are passionate about our work and genuinely care about our team. If you are eager to take on this challenge, join us in our journey of growth, innovation, and development!The Sports Data team is responsible for constructing and maintaining the data pipelines and processing systems that underpin our entire division. We provide clean, reliable, and real-time data through scalable services and APIs, allowing other teams to easily access and utilize data for new features, products, and innovations. By leveraging cloud-native technologies, automated pipelines, and infrastructure-as-code (IaC), we ingest, process, and distribute high-quality data at scale to enhance value across the organization.THE CHALLENGE:In the role of (Senior) Software Engineer for Sports Data (m/f/d) at Sportradar, you will engage with various components of the software stack, contributing to API development, testing, and documentation. You will be part of a collaborative, cross-functional team and play a vital role in delivering high-quality software that drives business value. This position presents an exciting opportunity for engineers who are keen on utilizing cutting-edge technologies to create scalable, reliable systems. If you thrive on solving technical challenges, learning from peers, and evolving in an innovative environment, we would be thrilled to have you on our team.Key Responsibilities:Collaborate and grow within a small, self-organized, agile software development team.Create robust and scalable back-end services and APIs for our advertising technologies utilizing modern frameworks and tools.Engage in the design and development of reliable, secure, and efficient data pipelines and systems while emphasizing quality, observability, and security.Mentor and develop team members by offering feedback and technical guidance.

Dec 22, 2025

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Senior Software Engineer at SteerBridge | Vienna, VA

SteerBridge Strategies

Full-time|On-site|Vienna, VA

SteerBridge Strategies is a cutting-edge technology firm dedicated to providing innovative, mission-driven solutions for the U.S. Government and private sector. With profound expertise in federal acquisition, digital transformation, and emerging technologies, we empower organizations with agile, commercial-grade capabilities that enhance operational efficiency and yield tangible mission success.At the heart of SteerBridge is our exceptional team—particularly the veterans whose leadership, problem-solving acumen, and unwavering commitment to excellence elevate every project we undertake. We don’t just recruit outstanding talent; we nurture it, fostering meaningful career paths for veterans, military spouses, and professionals who share our enthusiasm for advancing technology and bolstering the missions we serve.SteerBridge is on the lookout for Senior Software Engineers to contribute to our Modern Disability Claims (MDC) initiative. This project is dedicated to modernizing the claims processing systems for the Department of Veterans Affairs (VA), enhancing security, reliability, and operational efficiency in service of our nation’s veterans.As a Software Engineer, you will play a crucial role in supporting empirical product development. This includes grooming the Product Backlog, facilitating team communication, clarifying objectives for each Sprint, optimizing the planning process for maximum value, and identifying challenges while embracing agile practices.The ideal candidates will be quick learners, curious, innovative, results-driven, and possess strong interpersonal skills.

Mar 30, 2026

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Senior Software Engineer - Core Experiences at Speechify | Vienna, Austria

Speechify

Full-time|On-site|Vienna, Austria

About Speechify Speechify helps people access articles, cloud documents, and books through audio. Our tools let users listen and learn wherever they are, at work, commuting, or at their own pace. Like streaming changed audio entertainment, Speechify is reshaping how information is consumed by voice. We are recognized as a leader in our field and continue to grow quickly. Role Overview: Senior Software Engineer – Core Experiences The Core Experiences Team at Speechify develops and maintains the essential services and SDKs that power our product across platforms. This team connects product design with infrastructure, building APIs and systems that directly impact how users interact with Speechify. The work spans strategic planning, hands-on coding, and close collaboration with other groups to deliver a seamless experience. What You Will Do Work with product teams to define project scopes and processes that speed up customer feedback. Balance integration and user experience needs across products, delivering solutions through our cross-platform SDK. Improve existing features for better performance and faster load times, using new abstractions and algorithm enhancements. Build cloud functions and lightweight backend services in Kotlin. What We Look For Systems thinker who values simplicity and understands that optimization starts with good design. Quick to develop solutions and able to judge when to deliver fast versus when to invest more time for quality. Focused and comfortable in a startup setting, with good judgment about when to collaborate and when to work independently. Collaborative approach, able to bring together input from designers, marketers, and product managers. Location This role is based in Vienna, Austria.

Apr 20, 2026

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Senior Software Engineer - Ad:s Social (m/f/d)

Sportradar AG

Full-time|On-site|Vienna

Sportradar AG is seeking a Senior Software Engineer to join the Ad:s Social team in Vienna. This position centers on designing and building new features for advertising platforms used by clients across the sports and technology sectors. Role overview This role involves developing solutions that improve the performance and capabilities of Sportradar’s advertising technology. Collaboration with colleagues is a key part of the work, with a focus on sharing ideas and maintaining high technical standards. What you will do Design and implement enhancements for advertising platforms Contribute technical expertise to shape product direction Work closely with team members in a creative, collaborative setting Requirements Experience in software engineering, ideally with advertising or social platforms Strong skills in designing and building technical solutions Interest in working in a team that values creativity and excellence

Apr 29, 2026

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Senior Backend Software Engineer - .NET (All Genders)

Entain

Full-time|On-site|Vienna

Join Entain as a Senior Backend Software Engineer specializing in .NET technologies. In this role, you will be responsible for designing, developing, and maintaining scalable backend systems that power our innovative gaming platforms. You will work collaboratively with cross-functional teams to enhance our products and ensure a seamless user experience.

Mar 24, 2026

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Senior Software Engineer (C/C++), SDK at Sentry | Vienna

Sentry

Full-time|Hybrid|Vienna, Austria

About SentryAt Sentry, we believe that bad software shouldn't exist. Our mission is to empower developers to create superior software efficiently, allowing everyone to enjoy technology again.With over $217 million in funding and the trust of more than 100,000 organizations, including industry leaders like Disney, Microsoft, and Atlassian, we are dedicated to developing performance and error monitoring tools that enable companies to focus on innovation rather than bug fixing.We promote a hybrid work model across our global offices, with designated in-office days on Mondays, Tuesdays, and Thursdays to foster collaboration. If you're passionate about crafting tools that enhance the digital experience, we invite you to help us shape the future of software monitoring.About the RoleAs a Senior Software Engineer specializing in Native technologies on our SDK team, you'll collaborate with a diverse group of engineers to oversee Sentry's client-facing operations. Your responsibilities will include the development and maintenance of SDK libraries, enhancing existing native integrations, and creating new integrations for gaming consoles. You'll play a pivotal role in the design and evolution of both internal and external services, contributing to the creation of critical software at Sentry.If you're eager to build and enhance product features that empower software development teams to excel, all while contributing to open-source projects, this role is perfect for you.In This Role, You WillDevelop top-tier clients for native languages such as C and C++, as well as integrations for popular frameworks in Gaming, IoT, and high-performance applications.Collaborate with the Game Dev Experience (GDX) team to advance our native products for game engines and consoles.Tackle unique challenges in compilers, debugging, operating system internals, low-level optimization, and distributed systems.Utilize a variety of programming languages, systems, and technologies to address issues related to mission-critical software at Sentry (primarily C and C++, but also Rust, Python, .NET, and JavaScript).Partner with Infrastructure and Operations teams to devise scalable solutions (handling over a billion events daily).Write comprehensive unit and integration tests to ensure code correctness, along with robust documentation to educate peers and customers.You Will Enjoy This Role If YouAre excited about solving complex engineering challenges and have a passion for enhancing development processes.

Nov 24, 2025

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Senior Backend Engineer

antithesis

Full-time|On-site|Vienna, VA, USA

Join our dynamic team as a Senior Backend Engineer at antithesis, where you will play a crucial role in developing innovative backend solutions that drive our cutting-edge projects. As a Senior Backend Engineer, you will work closely with cross-functional teams to design, implement, and optimize our backend architecture, ensuring high performance and scalability.

Apr 2, 2026

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Software Engineer, Platform

Speechify

Full-time|On-site|Vienna, Austria

Speechify is hiring a Software Engineer, Platform for its Vienna office. This position centers on building and maintaining platform systems that help deliver strong user experiences. Key responsibilities Develop platform solutions that underpin Speechify’s products Collaborate with engineers to deliver infrastructure that is both reliable and scalable Contribute to the technical groundwork that supports user-facing features Location This role is based in Vienna, Austria.

Apr 25, 2026

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Senior Backend Engineer (Golang)

fiskaly

Full-time|€45K/yr - €70K/yr|On-site|Berlin, Berlin, Germany; Madrid, Madrid, Spain; Madrid, Madrid, Spain; Milano, Milan, Italy; Milano, Milan, Italy; Vienna, Vienna, Austria; Vienna, Vienna, Austria

fiskaly develops technology that secures digital receipts and ensures legally compliant transactions for millions of users each day. By applying digital signatures, the company helps prevent tax fraud and supports merchants with a streamlined, paperless solution. The team is dedicated to simplifying receipts for everyone. Role overview This Senior Backend Engineer (Golang) position is a full-time, permanent role open to candidates based in or near Vienna, or within a two-hour time zone difference. The company is not considering freelancers for this role. What you will do Serve as a System Architect within a focused squad, developing API-first SaaS products. Lead backend development using Golang and other object-oriented languages, contributing throughout the software lifecycle. Apply modern tools, including AI coding assistants and automation, to minimize repetitive tasks and tackle complex problems. Design, build, and maintain distributed systems for fiskaly's fiscalization platform. Shape the architecture and scalability of the unified digital receipts interface. Requirements Minimum 5 years of backend development experience, with a strong background in Golang and object-oriented programming. Fluency in both German and English. Located in or near Vienna, or within a two-hour time zone difference. Available for full-time employment (no freelance contracts). Salary and contract Gross annual salary: €45,000 – €70,000 Full-time, permanent position

Apr 21, 2026

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Senior Software Product Manager

PlanRadar

Full-time|On-site|Vienna

Join PlanRadar as a Senior Software Product Manager and lead the development of innovative solutions that transform the construction and real estate industries. In this full-time role, you will collaborate with cross-functional teams to define product vision, prioritize features, and drive the roadmap to enhance our software offerings.As an integral part of our product management team, you will be responsible for analyzing market trends, gathering customer feedback, and ensuring our products meet the highest quality standards. Your expertise in agile methodologies will help streamline our development processes and align our products with customer needs.

Apr 30, 2026

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Customer Success Engineer

Antithesis

Full-time|On-site|Vienna, VA, USA

About AntithesisAt Antithesis, we are committed to transforming the way modern distributed systems are tested and released. Our innovative platform is relied upon by engineering teams seeking unparalleled reliability, scalable performance, and comprehensive technical insights. We not only ensure system correctness but also cater to developers' needs for superior solutions. If you've faced the challenges of production outages, stressful on-call weeks, or prolonged release delays due to critical bugs, you'll resonate with our mission. If you have a passion for developer-first products, system resilience, and correctness, we would love to connect with you.About the RoleThe role of a Customer Success Engineer (CSE) is pivotal in making our customers successful. By deeply understanding our customers' intricate software systems and urgent business needs, we leverage our cutting-edge platform to assist them in thoroughly testing their mission-critical applications. We engage directly with engineers at progressive companies, ensuring they identify bugs before their users do.What You’ll DoCSEs play a vital role in recognizing customers’ business needs and technologies, providing value throughout the customer lifecycle. This includes onboarding, delivering essential customizations, and articulating impactful value propositions to customer leadership. Responsibilities also encompass identifying gaps in product features, surfacing new requirements, envisioning new application domains, and educating the tech industry about advanced testing techniques at scale.In this dynamic role, each day brings new experiences—whether you're on-site assisting a customer with a critical bug resolution and presenting findings to their team or collaborating with peers in the office to develop new testing methodologies.What We’re Looking ForProven initiative and determination to tackle challenging, open-ended technical problems that affect customers promptly.A degree in Computer Science or a related technical field.Experience as a technical consultant, software/quality engineer, solutions engineer/architect, or in a similar role.Strong communication skills to effectively interact with customers’ engineers and leadership.Proficiency in writing and debugging code.

Jan 3, 2026

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Software Engineer - Data Ingestion

Sentry

Full-time|Hybrid|Vienna, Austria

About SentryAt Sentry, we are passionate about eliminating bad software. Our mission is to empower developers to write superior software more efficiently so that we can all enjoy technology to its fullest.With over $217 million in funding and a community of 100,000+ organizations that trust our vision, we are developing state-of-the-art performance and error monitoring tools that enable industry leaders like Disney, Microsoft, and Atlassian to spend less time resolving issues and more time innovating.Sentry embraces a flexible hybrid work model across our global offices, establishing Mondays, Tuesdays, and Thursdays as dedicated in-office days to foster meaningful collaboration. If you're eager to create tools that enhance digital experiences, join us in building the next generation of software monitoring solutions.About the RoleAs a Software Engineer (Ingest) on our Client Infrastructure team, you will work alongside a skilled group of engineers to enhance systems that handle millions of events each minute! You will directly engage with our core ingestion pipelines, including our open-source initiatives Relay and Symbolicator, where each line of code makes a global impact on developers. Envision optimizing real-time data streams, architecting robust distributed systems, and innovating new solutions that keep Sentry leading the application monitoring field. We provide the infrastructure that allows developers to concentrate on what truly matters.Your contributions will be vital in constructing and expanding the fundamental infrastructure that drives Sentry's data ingestion. You will confront complex engineering challenges and make significant contributions to open-source projects that benefit developers worldwide.ResponsibilitiesDesign, develop, and maintain globally distributed, horizontally scalable infrastructure to reliably ingest critical data from customer applications.Collaborate with the Client Infrastructure team to enhance and evolve our data processing pipeline and the services that support Sentry's growth.Address complex issues related to distributed systems, performance optimization, and high-throughput data processing.Utilize various programming languages and technologies (primarily Rust, along with Python) to tackle essential system-level challenges.Collaborate with Infrastructure and Operations teams to design and implement solutions that propel our capabilities forward.

Jan 28, 2026

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Software Development Engineer II - Front End

Esri

Full-time|On-site|Vienna, Virginia, United States

Join Esri as a Software Development Engineer II specializing in Front End technologies. In this dynamic role, you will work closely with cross-functional teams to develop innovative solutions that enhance user experience and drive the usability of our products. You will be instrumental in creating user-friendly interfaces and improving the performance of our applications.

Apr 10, 2026

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Software Development Engineer II - Back End

Esri

Full-time|On-site|Vienna, Virginia, United States

Join Esri as a Software Development Engineer II specializing in back-end solutions. In this role, you will be responsible for developing robust and scalable software applications that meet the needs of our diverse clientele. Your expertise in back-end technologies will play a critical role in shaping the future of GIS technology.

Apr 10, 2026

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iOS Core Product Software Engineer

Speechify

Full-time|On-site|Vienna, Austria

Role Overview Speechify is hiring an iOS Core Product Software Engineer in Vienna, Austria. This role centers on building and maintaining core features for Speechify's iOS applications. The work involves designing, coding, and supporting product functionality to keep apps responsive and high performing. What You Will Do Design and implement core product features for iOS Write clean, efficient, and reliable code Maintain and improve app performance and responsiveness Collaborate with teammates to deliver a strong user experience Location This position is based in Vienna, Austria.

Apr 25, 2026

Senior Software Engineer - Ad:s Social (m/f/d)

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