Senior Frontend Engineer

2 days ago

Johannesburg, Gauteng, South Africa SIM2Serve (Pty) Ltd Full time R40 000 - R80 000 per year

Senior Frontend Engineer (Vercel)

Location:
Johannesburg South (Meyersdal)

Employment Type:
Full-time (Office-Based)

Salary:
Based on experience + performance-based bonuses

Start Date:
ASAP

Department:
Software Development / Engineering

About Us

At travSIM, we help travellers stay connected worldwide through a wide range of SIM and eSIM solutions. We're expanding fast and are now looking for a skilled
Frontend Engineer
to join our engineering team. You'll be responsible for delivering a high-performing e-commerce website with Stripe integration, built on and deployed on Vercel.

Our backend engineers own the NestJS backend — your focus will be building a clean, scalable, and performant frontend integrated with Payload CMS and external APIs.

Read Before Applying


Do Not Apply If:


• You do not have proven, hands-on experience with
(App Router & RSC)
and
Vercel deployments
.


• You have not worked on frontend payment flows using
Stripe
in production.


• You cannot demonstrate practical experience with
Payload CMS
.


• You are not comfortable working in a fast-paced, collaborative environment.

What You'll Be Doing

You will take full ownership of the frontend delivery for a global e-commerce platform, working closely with backend engineers and product teams to ensure seamless API and CMS integration.

Core Responsibilities


• Develop, test, and maintain a
+ Vercel
e-commerce frontend.


• Integrate
Stripe payments
(Payment Element, Checkout, Apple Pay, Google Pay, 3DS flows).


• Implement
Payload CMS
integration, including live previews, block-based content, and revalidation triggers.


• Ensure high
performance and SEO
(Core Web Vitals, structured data, i18n routing).


• Build responsive and accessible UI with
Tailwind CSS
following WCAG 2.1 fundamentals.


• Implement robust API integration and data caching (SWR / React Query).


• Handle
forms and validation
with React Hook Form + Zod/Yup.


• Write and maintain unit, e2e, and performance tests (Jest/RTL, Playwright, Lighthouse CI).


• Monitor and improve quality (Sentry, GA4, A/B testing, feature flags).


• Apply modern security and best practices (XSS/CSRF mitigation, secure headers, secrets management).

Required Skills & Experience


• Strong hands-on experience with
(App Router & RSC)
.


• Practical knowledge of
Vercel deployments & environments
.


• Proficiency in
React + TypeScript
with modern hooks and state management.


• Experience integrating
Stripe frontend payment flows
.


• Proven work with
Payload CMS
and content-driven routing.


• Strong grounding in
performance, SEO, and accessibility fundamentals
.


• Experience writing and maintaining
unit/e2e tests
.


• Solid understanding of
frontend security practices
.

Nice-to-Have (Bonus Skills)


• Familiarity with
Prisma/Postgres
concepts and Redis caching.


• Experience with large-scale
i18n and localisation
.


• Exposure to
growth and analytics tools
(PostHog, GTM server-side, affiliate tracking).


• Knowledge of customer tooling integrations (Crisp/Intercom).

Why Join Us


• Build high-performance web platforms with direct impact on global travellers.


• Collaborate with an international team of engineers and product experts.


• Opportunity to work on cutting-edge frontend tech + Vercel).

If you're ready to deliver world-class frontend experiences, we'd love to hear from you

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