Senior Software Developer; TypeScript​/AWS​/C#

Recruiter:
Golden Rule

Job

Date posted:
Thursday, February 26, 2026

Location:

Johannesburg, South Africa

Salary:
Negotiable

We’re modernizing into a vendor‑independent platform covering the end‑to‑end customer journey. You’ll build secure, observable, scalable services and clean front‑ends, contribute to architecture, and raise the engineering bar (standards, patterns, CI/CD, code quality). You’ll work across C#/.NET, Type Script (Node + React/Next.js), and AWS— with emphasis on event‑driven microservices, API‑first design, and sales/dialer integration via Amazon Connect.

• Design and implement .NET 8 and js microservices with clean architecture, CQRS/Mediat
  
  R, EF Core (MSSQL/Postgres), and Open API‑first contracts.
• Build React/Next.js apps (Customer portal, Ops Console, Pricing Console) with strong state management (Zustand/Redux), Tan Stack Query, and component libraries with design tokens.
• Implement event‑driven patterns (Outbox, Saga) using AWS Event Bridge, SNS/SQS, and idempotent consumers.
• Create robust APIs (REST; Graph
  
  QL a plus), secure with OAuth2/OIDC and JWT, integrate with identity (Cognito/Entra /Keycloak).
• Integrate Amazon Connect (IVR, CTI, call recording, agent states, dispositions) with CRM/Sales workflows and near‑real‑time analytics.
• Deliver infra‑as‑code (AWS CDK/Terraform), Git Hub Actions pipelines, and trunk‑based development with feature flags and blue/green or canary deployments.
• Apply observability by design: structured logs (Serilog), metrics (Prometheus/Cloud Watch), tracing (Open Telemetry), dashboards, and actionable alerts (SLIs/SLOs).
• Optimize cost, reliability, and performance (caching, connection pooling, async messaging, retries/backoff, circuit breakers).
• Contribute to and lead Architecture Decision Records (ADRs); evolve the domain model and ERD across Lead, Product, Pricing, Billing, Compliance, Support.

• Uphold SOLID, 12‑factor, and OWASP ASVS; threat‑model new features.
• Maintain code quality (Sonar Qube), unit/integration/contract/e2e tests (xUnit/MS Test, NUnit, Jest/Vitest, Playwright), and test data management.
• Ensure data protection (PII encryption, KMS), least privilege IAM, parameterized queries, and secrets management (AWS Secrets Manager).
• Champion code reviews, pairing, and continuous improvement; mentor engineers; propose and drive engineering OKRs.

• Bachelor’s degree in computer science, software development, or related field.
• Experience with CI/CD pipelines and Dev Ops practices.
• Exposure to Agile/Scrum methodologies.
• 10+ Years of Software Development Experience.

• C# / .NET 7/8; ASP.NET Core Web API, Mediat
  
  R (CQRS), Fluent Validation, EF Core (code‑first migrations), Automapper.
• Messaging Events:
  Event Bridge, SNS/SQS, Outbox (Postgres preferred), idempotency keys, eventual consistency patterns.
• Data: MSSQL Postgres, schema design, indexing, transactions, isolation levels; basic Redis caching.
• API‑first:
  OpenAPI/Swagger, API versioning, problem+json, pagination/filters, rate limiting.

• Type Script (advanced types, generics), React/Next.js (App Router), Tan Stack Query, Zustand/Redux, Form libs (React Hook Form), component libraries (MUI/Chakra/shadcn).
• UI engineering: performance profiling, accessibility (WCAG), responsiveness, error boundaries, Suspense.

• Core AWS: IAM, VPC, API Gateway/ALB, Lambda, ECS/Fargate, Cloud Watch, S3, Cloud Front, RDS/Aurora, Dynamo
  
  DB (nice), Elasti Cache.
• Pipelines:
  Git Hub Actions, semantic versioning, conventional commits, Sonar Qube gates, SBOMs (Cyclone
  
  DX), artifact promotion.
• IaC: CDK or Terraform; multi‑account/multi‑env; secrets and parameter stores.
• AWS Cloud knowledge - lamdas, EC2 instances, API gateway, Dynamo
  
  DB, S3, route 53, SES, parameter store, cloud formation etc.
• Postgre
  
  SQL (brain Timescale DB) - Database design, loadbalancers, connection pooling, read/write replicas.

• OAuth2/OIDC/JWT, Cognito, secure cookie strategy, CSRF mitigation for web flows.
• Serilog, Open Telemetry, dashboards/alerts; runbooks and readiness probes.