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.                  

Think you’re a good fit for this job? 

Tell us more about yourself and why you're interested in the role when you apply.
And don’t forget to include links to your portfolio and LinkedIn.

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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.

About Paystack

Paystack’s mission is to accelerate digital payments on the continent of Africa. Over 200,000 of some of the most renowned businesses in Nigeria, as well as a growing number of merchants in South Africa, Ghana, and Kenya use Paystack’s modern payments gateway. They include the likes of MTN, Burger King, UPS, AXA Mansard Insurance, FairMoney, PiggyVest, FilmHouse Cinemas, Smile Communications, Air Peace Airlines, Crocs, Under Armour, Richemont Lifestyle Group (RLG), and many others.

In just over 10 years, our growing team has introduced a steady cadence of innovation within the online payments landscape, such as automated recurring payments, the ability for customers to pay directly from their bank accounts, automated chargebacks, and much more. 

We’re obsessed about building the best place to work on the continent while accelerating digital commerce across Africa and we need your help!

About the role

As a senior full-stack engineer, you take responsibility for delivering and supporting robust back-end and front-end applications that exposes our data and functionality to internal and external users.

Applications handling financial information need to be able to handle large data sets in a performant manner, while being highly accurate and reliable.

You’ll work with a team of talented engineers to design and build systems that support some of South Africa’s best known brands.

What we expect of you:

• Architect and Develop: Design and implement robust solutions for our platform, ensuring scalability, efficiency, and reliability.
• Product Innovation: Design and development of technical solutions to deliver on our product vision.
• Technical Problem Solving: Tackle complex technical challenges, providing innovative solutions to enhance system performance and reliability.
• System Integration: Collaborate on the refinement of the platform’s architecture, focusing on optimization and seamless integration to other systems.
• Code Review and Testing: Review specifications and code submissions and conduct thorough testing to maintain code quality.
• System support: Collaborate with other teams, both inside and outside engineering, to assist merchants and customers where necessary.

What you are good at:

• You have extensive programming experience in at least one language such as Javascript, Typescript, Java, C++, C#, Python or another major language
• Working on large, distributed systems at scale
• Understanding and working with SQL databases
• Writing solid unit testing and integration tests
• You communicate clearly and are able to collaborate in a remote environment
• Taking ownership of work assigned to you
• You have a passion for building products to help African businesses

Technology stack:

Our technology stack includes the following:

• Typescript and Javascript
• Node.js
• Frameworks: Express.js, Sails.js and Nest.js
• Frontend frameworks: React, Angular and Vue
• Redis
• MySQL and MongoDB
• Docker
• Kubernetes
• AWS

Application Instructions - Read carefully!

1. To apply, click the "Apply for this job" button

2. Complete all the required questions

3. This role is only open to candidates based in Cape Town, South Africa

Questions? Please contact careers@paystack.com.