FullStack Developer

Salt • JavaScript • TypeScript • C# • 5 months ago
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In office (Johannesburg)

First seen by Alion on May 26, 2026. Salt scores A on the Alion truth index.

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Salt

Founded in 2009, Salt is a global digital talent, recruitment, and workforce consultancy specializing in technology, creative, marketing, and sales staffing. Headquartered in London, United Kingdom - with an international network of offices spanning North America, Europe, Asia-Pacific, and Latin America - the agency serves fast-scaling startups, mid-market companies, and multinational enterprises. Through its permanent and contract recruitment models, recruitment process outsourcing (RPO), nearshore/offshore talent delivery (Salt: Labs), and strategic HR advisory services, it enables organizations to build, scale, and manage high-performing teams across AI, technology, and digital transformation initiatives.
welovesalt.com • HQ: London, United Kingdom • Recruiting & Staffing • Human Resources • Professional Services • 201-500 employees • Est. 2009
Job Description Summary of Role

Build independent, composable micro frontend modules that integrate into a governed portal shell using runtime composition. Build domain-aligned, event-driven backend capabilities that support deterministic decisioning, versioning, and replay ability.

Location: Braamfontein, Johannesburg

Responsibilities

Frontend Engineer (Composable Micro frontend Platform) Develop micro frontend modules (widgets, panels, tabs) using React and Next.js

Integrate via Module Federation and platform extension points

Use platform SDK for context, events, telemetry and messaging

Ensure compliance with platform contracts and governance rules

Build responsive, accessible UI aligned to design system

Maintain performance budgets and emit telemetry Backend Engineer (Domain & Platform Capability Engineering) Own and implement domain capabilities (e.g. Party, Quotes, Pricing)

Design APIs, events, and data ownership boundaries

Implement event-driven architecture (commands, events, projections)

Build deterministic decision engines (pricing, underwriting, claims)

Ensure full versioning discipline across APIs, events, and rules

Integrate systems via contracts, not direct coupling

API Gateway and BFF patterns

Open Policy Agent (OPA)

Schema Registry and contract testing

Temporal or workflow engines Qualifications Matric and a Tertiary Degree Front End Required Skills: React, Next.js (App Router), TypeScript

Module Federation or microfrontend architecture experience

State management (React Query / Zustand)

Strong understanding of browser security (CSP, sandboxing)

Experience with OpenTelemetry (frontend)

Experience with design systems and component libraries Back End Required Skills: .NET Core (preferred) or equivalent backend platform

PostgreSQL and Redis

Kafka and/or NATS JetStream

Event-driven architecture and event sourcing concepts

API design and versioning strategies

Cloud platforms (AWS and/or Azure)

Containers (Docker, Kubernetes)

Infrastructure as Code (Terraform) OpenTelemetry for observability

Salt is acting as an Employment Business in relation to this vacancy.

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