Frontend Engineer

1. Role Title & Level

Frontend Engineer

Senior (6+ years of experience)

2.

Engagement Summary

·

**Engagement

Type:** Contract / Secondment

·

**Squad

Context:** Embedded within the Visa–client joint Tech

Squad; responsible for frontend feature delivery, app UI integration, and push

provisioning flows

·

**Expected

Duration:** [12 months]

·       Primary Location:

[Nairobi, Kenya] — Expectation of days in the office will be confirmed by your

Hiring Manager

·       Sprint Cadence:

Fortnightly agile sprints

·       Reporting Line:

[Reports to Technical Program Manager, TPM]

3. Role Purpose

We are looking for a Senior Frontend Engineer

to play a critical role in building high-quality, elegant and responsive user

experience using the latest front-end technologies. Embedded within a cross-functional tech

squad, this role works in close collaboration with backend engineers, UX/UI

designers, and the Scrum Master to deliver high-quality features iteratively

within sprint cycles.

4. Key Responsibilities

·

Implement

frontend features and enhancements for push provisioning flows within the

M-Pesa app, including wallet provisioning UI, token management screens, and

user consent flows.

·

Integrate

CYBS (CyberSource) payment services into the M-Pesa application frontend,

implementing required UI components and user flows to specification.

·

Execute

frontend test scripts for acquiring/payment acceptance flows, including

UI-level functional tests and end-to-end test scenarios

·

Collaborate

with the UI/UX Designer to translate wireframes, prototypes, and design

specifications into pixel-accurate, responsive, and accessible frontend

implementations.

·

Implement

analytics and event-tracking instrumentation within the app frontend to support

digital lift measurement and data-driven campaign tracking.

·

Ensure

frontend code meets performance standards: app load time, rendering

performance, and network efficiency benchmarks defined in the project's

performance budget.

·

Build

and maintain frontend unit and integration tests; contribute to automated UI

testing frameworks where applicable.

·

Work

with Backend Engineers to agree and consume backend API contracts; surface and

resolve API integration issues at the frontend layer.

·

Support

knowledge transfer by producing component documentation, frontend integration

guides, and onboarding materials for internal team frontend engineering

counterparts.

5. Measurable Outcomes & Deliverables

First 30 Days

·

Development

environment configured; app codebase reviewed; understanding existing frontend

architecture documented.

·

First

sprint frontend deliverables completed and reviewed (per sprint plan); code

merged to agreed branch.

·

Analytics

instrumentation plan produced (in collaboration with Data Scientist): event

taxonomy defined, tracking library confirmed.

·

Frontend

technical approach document produced for push provisioning flow implementation.

·

Device/OS

test matrix agreed and documented.

Days 31–60

·

Push

provisioning UI components implemented and validated in sandbox/development

environment.

·

CYBS

integration frontend components: at least one payment flow UI built and tested

against sandbox backend.

·

Analytics

events implemented and validated for at least two key user journeys (e.g., card

provisioning, payment initiation).

·

Achieve

≥ 70% frontend unit test coverage on all new code delivered to date

·       Document a component library inventory of

reusable frontend components built to date

Days 61–90

·

Push

provisioning frontend flows signed off by UI/UX Designer and Product Owner;

functional tests passing across agreed device matrix.

·

CYBS

integration frontend completed and UAT-ready; test script evidence documented.

·

Full

analytics instrumentation live in staging; digital lift tracking validated

end-to-end with Data Scientist.

·

Frontend

integration guide produced and handed over to client frontend engineering team.

·

At

least two knowledge transfer sessions delivered to client frontend developers.

Ongoing KPIs

·

Deliver

frontend features in line with sprint commitments and agreed designs.

·

Maintain

high UI quality through effective testing and early identification of defects.

·

Ensure

optimal performance and smooth user experience across key customer journeys.

·

Build

frontend components that are accessible, usable, and aligned with agreed

standards.

·

Collaborate

effectively with design, backend, and data counterparts to support endtoend feature delivery

6. Stakeholders & Ways of Working

Agile Ceremonies: All sprint ceremonies; participate in technical

refinement for frontend stories; daily stand-ups.

Reporting Cadence:

·

Sprint-level:

frontend delivery status at sprint review.

·

Ad-hoc:

technical blockers escalated to Backend Engineers or Scrum Master within 4

hours.

Cross-Functional Touchpoints:

·

UI/UX

Designer (design handoff, specification review, usability feedback).

·

Backend

Engineers (API contracts, data models, integration testing).

·

Data

Scientist (analytics event taxonomy, tracking validation).

·

API

Integration Engineer (frontend-side API integration support).

·

QA

team (test execution, device testing, UAT).

7.

Required Skills & Experience

·

Extensive

frontend/mobile engineering experience, including production-grade mobile app

development (Android, iOS, or React Native / Flutter cross-platform).

·

At

least 3 years in payments, fintech, or mobile money application development.

·

Experience

with frontend architecture design, component library strategy, and technical

leadership.

·

Proficiency

in native Android (Kotlin/Java) / native iOS (Swift) or equivalent

·

Experience

consuming RESTful APIs and handling complex async data flows in frontend/mobile

applications.

·

Familiarity

with mobile app testing frameworks and UI test automation.

·

Strong

understanding of mobile performance optimisation and network efficiency.

·

Experience

implementing third-party SDK or payment gateway integrations within mobile

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