Senior Full-Stack Engineer (Frontend Heavy) at Tunzaa Fintech

Tunzaa Fintech is seeking an experienced Senior Full-Stack Engineer (Frontend Heavy) to join its technology team in Dar es Salaam, Tanzania. The role is focused on building high-quality web applications and scalable frontend architectures that support mission-critical financial and commerce platforms.

The successful candidate will take ownership of customer-facing and business interfaces across the Tunzaa ecosystem. The position requires strong frontend engineering expertise, knowledge of scalable software architecture, and the ability to build reliable systems capable of supporting high-volume financial and retail transactions.

Why Work with Tunzaa Fintech?

This role offers an opportunity to work on technology products within the fintech and commerce sector, where reliability, scalability, security, and performance are critical. The successful candidate will contribute directly to systems used for important financial and commercial transactions.

The position also provides an opportunity to influence frontend architecture, develop reusable engineering systems, collaborate with multidisciplinary technology teams, and mentor junior engineers.

About Tunzaa Fintech

Tunzaa Fintech develops financial and commerce technology solutions designed to support digital transactions and business operations. Its technology ecosystem requires scalable and reliable applications capable of handling complex customer and business needs.

Who Can Apply?

This opportunity is suitable for experienced software engineers with strong frontend development expertise and a background in building complex, production-grade web applications.

Candidates should have at least five years of professional software engineering experience, including substantial experience developing sophisticated frontend applications. A strong understanding of software architecture, APIs, application state management, performance optimization, and scalable UI systems is important for this position.

Key Responsibilities

The Senior Full-Stack Engineer will be responsible for:

• Designing scalable frontend architectures for large SaaS applications.

• Building reusable component libraries that can be shared across multiple products.

• Developing modular frontend systems that support multiple tenants without unnecessary code duplication.

• Developing frontend features using modern frameworks.

• Building backend APIs when required.

• Designing reliable API contracts in collaboration with backend engineering teams.

• Optimizing data fetching, caching, and client-server synchronization.

• Designing predictable global state architectures for complex applications.

• Optimizing application rendering performance and improving Core Web Vitals.

• Reducing application bundle sizes through effective engineering practices.

• Implementing lazy loading and code splitting.

• Ensuring responsive performance across low-end devices.

• Developing multi-tenant frontend systems with strict tenant isolation.

• Implementing configurable themes, permissions, and feature flags.

• Writing clean, maintainable, and well-tested code.

• Developing comprehensive unit and integration tests.

• Debugging complex production issues.

• Participating in software architecture reviews.

• Working closely with Product Designers, Backend Engineers, QA, DevOps, and Product Managers.

• Mentoring junior engineers.

• Contributing to a strong engineering culture and continuous improvement.

Qualifications and Skills Required

Applicants should possess:

• At least 5 years of professional software engineering experience.

• At least 3 years of experience building complex frontend applications.

• Bachelor’s Degree in Computer Science, Software Engineering, Information Systems, or a related field.

• Experience developing production-grade SaaS applications.

• Strong understanding of software architecture and design patterns.

• Proven experience designing scalable frontend architectures.

• Experience building reusable UI component systems.

• Experience managing complex application state, particularly in high-volume transactional applications.

• Experience designing resilient API integrations.

• Strong knowledge of performance optimization for frontend applications.

• Understanding of cross-browser compatibility.

• Knowledge of frontend security best practices.

• Strong problem-solving and debugging abilities.

• Good collaboration and communication skills.

• Ability to mentor and support junior engineers.

How to Apply

Interested candidates who meet the requirements should submit their applications online through the official application form.

Apply via:

https://forms.gle/PbKW8VQW8dbFi2mh9

Application Deadline: 14 August 2026 at midnight.

For inquiries, contact:

Email: [email protected]

Phone: +255 676 852 945

Inquiry Deadline: 13 August 2026.

Final Thought

The Senior Full-Stack Engineer (Frontend Heavy) position at Tunzaa Fintech is an opportunity for an experienced software engineer to contribute to scalable fintech and commerce platforms. Professionals with strong frontend architecture, SaaS development, API integration, performance optimization, and software engineering experience are encouraged to apply before the deadline.