C++ Jobs in Cardiff.
All active C++ roles based in Cardiff.
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Senior Software Engineer, Windows/Desktop Applications - Cardiff, United Kingdom
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The mission of Speechify is to make sure that reading is never a barrier to learning.
Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember more. Speechify’s text-to-speech reading products include its iOS app, Android App, Mac App, Chrome Extension, and Web App. Google recently named Speechify the Chrome Extension of the Year and Apple named Speechify its 2025 Design Award winner for Inclusivity.
Today, nearly 200 people around the globe work on Speechify in a 100% distributed setting – Speechify has no office. These include frontend and backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies
- Lead the design, architecture, and development of native Windows desktop applications using Windows App SDK, WinUI (or related UI frameworks), C#, XAML, and — when needed — C++.
- Define and enforce best-practices for Windows desktop development across the codebase: code architecture, performance, memory usage, responsive UI, cross-version compatibility (Windows 10/11+), and maintainability.
- Drive accessibility efforts: integrate and validate support for accessibility APIs (e.g. Microsoft UI Automation or other relevant Windows accessibility frameworks), ensure UI controls, focus management, keyboard navigation, screen-reader support, and usability for users with disabilities.
- Collaborate closely with product designers, UX researchers, QA, and other stakeholders to shape feature planning, UI/UX architecture, and long-term roadmap for the Windows platform.
- Take ownership of full lifecycle of features: conception → design → implementation → testing → release → maintenance. Ensure quality, reliability, and consistency across releases.
- Identify, diagnose, and resolve complex bugs, performance bottlenecks, memory leaks, rendering issues, or compatibility problems — and propose robust architectural or design solutions.
Required:
- 3+ in Windows desktop application development using Windows App SDK, WinUI (or similar), C#, XAML — and ideally additional experience with native Windows code (C++, Win32/WinRT/COM).
- Deep understanding of Windows application architecture, including interop between managed code (.NET) and native code.
- Proven track record of designing, building, and shipping production-quality desktop applications, with an emphasis on reliability, performance, scalability, and maintainability.
- Strong experience with accessibility APIs on Windows (e.g. Microsoft UI Automation or similar), and a dedication to building accessible and inclusive software.
- Excellent software engineering fundamentals: OOP, design patterns, data structures, algorithms, memory management, multi-threading or asynchronous programming (where relevant).
- Experience leading technical design, mentoring other engineers, conducting code reviews, and making architecture-level decisions.
- Strong communication skills; ability to articulate tradeoffs, collaborate with cross-functional teams, and drive consensus.
- A user-centric mindset: focus on building polished, intuitive, and accessible experiences for end users.
Preferred / Bonus:
- Experience with writing automated tests for UI — unit tests, integration tests, UI automation tests; familiarity with relevant testing frameworks.
- Experience with performance optimization for desktop apps (memory usage, startup time, rendering performance, high-DPI support, responsiveness under load).
- Experience with localization/globalization, right-to-left UI support, internationalization, accessibility for multiple regions.
- Familiarity with telemetry, analytics, crash reporting, logging, and error monitoring in desktop applications.
- Previous experience in shaping CI/CD workflows, release pipelines, and deployment strategies for desktop applications.
- Demonstrated ability to take ownership of feature areas or modules and drive them long-term, including maintenance, refactoring, and technical debt management.
What we offer
- A high-impact role: you will define architecture, shape the future of our Windows product, and directly influence what millions of users see and experience.
- A collaborative, flat-structure engineering culture — you are not just a coder, but a builder and a decision-maker.
- Opportunities to lead — mentor others, steer technical direction, and grow into broader technical leadership (e.g. Tech Lead, Architect).
- Flexibility, autonomy, and responsibility: you define how to solve problems, own features end-to-end, and contribute to long-term product vision.
- A purpose-driven mission: building software that’s reliable, accessible, and user-centered — making a real difference for people.
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Speechify is committed to a diverse and inclusive workplace.
Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.
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C++ Software Engineer II - ArcGIS Maps SDKs for Native Apps
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Overview
Bring your passion for C++ to help us develop a cross-platform mapping SDK that runs on desktop and mobile devices using the latest compilers and C++ standards. At Esri, we love making a difference and leading the way in developing innovative technology. This is a great opportunity to design and develop next-gen Esri technology - initially focusing on text: calculation, de-confliction, positioning and real-time rendering for 2D and 3D.
Esri has a Relocation Assistance Program and can provide support with relocating to the Cardiff area for this position. Check out more details about the Esri R&D Center – Cardiff!
Responsibilities
- Build C++ software components that follow industry and team-standard design patterns, development methodologies, and deployment models
- Develop excellent software for use in field mapping, data collection, sensor networks, street navigation, and more, with the initial focus being on text related components
- Collaborate with other software and product engineers throughout the development process
- Discuss user requirements; design and develop library APIs and implementations
- Research, analyse, articulate, and solve complex problems with design, development, testing, and documentation
- Learn and collaborate in SDK environments and languages, for testing, investigation and prototyping
Requirements
- 2+ years of commercial/academic software development experience, including debugging algorithms, and designing functions and class structures
- Fluent in, and keen to engineer with, modern C++ (14/17/20) and STL, including smart pointers, optional, variant, lambda expressions, move semantics and template programming
- Experience with IDEs, compilers, and development tools for Linux, Windows or MacOS
- Object oriented design skills
- Understanding of algorithms and design patterns
- Ability to work closely with the team to build quality software in a constantly evolving environment
- Effective time management and organisational skills
- Excellent written and verbal communication skills
- Bachelor’s degree in computer science, engineering, mathematics, mapping, GIS, or related field
- Existing work authorisation for the United Kingdom
Recommended Qualifications
- Experience in complementary design approaches such as Value-based, Data-Oriented, Multithreading, Parallelisation, Functional or Compile-time
- Interest in or knowledge of text layout, typography, fonts, and libraries such as ICU and HarfBuzz
- Familiarity with GIS applications and technologies
- Familiarity with some other languages which our SDKs target or are used in infrastructure (such as Kotlin, Qt, C#, Swift, Flutter, Typescript or Python)
- Master’s degree in GIS, computer science, engineering, or related field
Base salary is one component of our total rewards strategy. Compensation decisions and the base range for this role take into account many factors including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs.
A reasonable estimate of the base salary range is £39,600 - £67,320.
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The Company
At Esri, diversity is more than just a word on a map. When employees of different experiences, perspectives, backgrounds, and cultures come together, we are more innovative and ultimately a better place to work. We believe in having a diverse workforce that is unified under our mission of creating positive global change. We understand that diversity, equity, and inclusion is not a destination but an ongoing process. We are committed to the continuation of learning, growing, and changing our workplace so every employee can contribute to their life’s best work. Our commitment to these principles extends to the global communities we serve by creating positive change with GIS technology. For more information on Esri’s Racial Equity and Social Justice initiatives, please visit our website here.
If you don’t meet all of the preferred qualifications for this position, we encourage you to still apply!
Esri is an equal opportunity employer (EOE) and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law. If you need reasonable accommodation for any part of the employment process, please email askcareers@esri.com and let us know the nature of your request and your contact information. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to from this e-mail address.
Esri Privacy Esri takes our responsibility to protect your privacy seriously. We are committed to respecting your privacy by providing transparency in how we acquire and use your information, giving you control of your information and preferences, and holding ourselves to the highest national and international standards, including CCPA and GDPR compliance.
Ready to apply?
Apply to Esri
GIS Product Engineer II – ArcGIS Maps SDKs for Native Apps
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Overview
Bring your enthusiasm and talents to Esri, creating industry leading ArcGIS products. The ArcGIS Maps SDKs allow developers to build modern mapping applications for mobile and desktop platforms, with 2D and 3D data visualisation, and online or offline access. This is a fantastic opportunity to join the product development team and support the delivery of regular, high-quality releases in a collaborative and dynamic environment.
Help us improve our cross-platform GIS software libraries, built on the latest compilers and C++ standards, and create sample apps, developer documentation, and developer outreach.
Esri has a Relocation Assistance Program and can provide support with relocating to the Cardiff area for this position. Check out more details of the Esri R&D Center – Cardiff!
Responsibilities
- Apply curious, independent thought, and attention to detail to explore and understand the challenges that ArcGIS users face and provide usable, informative feedback on user experience
- Understand the customer, who are software developers, gathering requirements and use cases that translate into actionable code and doc improvements
- Build rich and varied GIS datasets and maps, sample applications and articles that can be used to highlight product capabilities, explain APIs and guide user (developer) practices
- Work with your development team, and teams across Esri, to design, create, and validate the newest datasets and GIS workflows to support field mapping, data collection, spatial analysis and verify the functionality meets user workflows and is consistent with Esri ecosystem
- Describe GIS best practices and demonstrate how to apply these GIS workflows in internal team meetings, on product forums and websites, with customers, at Esri events, or in publications like the ArcGIS Blog
- Document technical topics and concepts, and produce developer-focused product documentation
- Learn about and collaborate in SDK environments (such as Kotlin, Qt, C#, Swift, Flutter, Python), to explore issues, investigate problems, and design and prototype enhancements
- Build focused test code to represent complex situations for investigation and regression testing
- Administer, automate, and manage online and database GIS systems and services to support the development of new product features and ongoing product releases
Requirements
- 2+ years of GIS experience (such as modeling, analyzing, or presenting geospatial data in a scientific, engineering, governmental, or post graduate academic environment)
- Proficiency with mapping, spatial data or GIS platforms such as ArcGIS or QGIS
- Strong problem-solving and analytic skills
- Proven initiative and creativity to find ways to explore, investigate, test and validate software behavior
- Excellent communication and team collaboration skills
- Experience of, and interest in, scripting or coding to appreciate our developer users' challenges and to communicate effectively with the development team
- Bachelor’s degree in GIS, geography, computer science, engineering, or related field
- Existing work authorisation for the United Kingdom
Recommended Qualifications
- Experience and passion for working with cartography, mapping or geospatial data
- Interest in or knowledge of layout, typography, and fonts for international text
- Proven experience of user communication and education such as having been responsible for product documentation, blogs, written or video tutorials, presentations
- Familiarity using version control systems such as Git, for documentation and code
- Familiarity with some of the scripting or coding languages which our SDKs target, and which we use for automation, such as using Kotlin, Qt, .Net, Swift, Flutter, Typescript or Python
- Master’s degree in GIS, computer science, engineering, or related field
Base salary is one component of our total rewards strategy. Compensation decisions and the base range for this role take into account many factors including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs.
A reasonable estimate of the base salary range is £37,080 - £58,092.
#LI-EL1
#LI-Onsite
The Company
At Esri, diversity is more than just a word on a map. When employees of different experiences, perspectives, backgrounds, and cultures come together, we are more innovative and ultimately a better place to work. We believe in having a diverse workforce that is unified under our mission of creating positive global change. We understand that diversity, equity, and inclusion is not a destination but an ongoing process. We are committed to the continuation of learning, growing, and changing our workplace so every employee can contribute to their life’s best work. Our commitment to these principles extends to the global communities we serve by creating positive change with GIS technology. For more information on Esri’s Racial Equity and Social Justice initiatives, please visit our website here.
If you don’t meet all of the preferred qualifications for this position, we encourage you to still apply!
Esri is an equal opportunity employer (EOE) and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law. If you need reasonable accommodation for any part of the employment process, please email askcareers@esri.com and let us know the nature of your request and your contact information. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to from this e-mail address.
Esri Privacy Esri takes our responsibility to protect your privacy seriously. We are committed to respecting your privacy by providing transparency in how we acquire and use your information, giving you control of your information and preferences, and holding ourselves to the highest national and international standards, including CCPA and GDPR compliance.
Ready to apply?
Apply to Esri