Senior Full-Stack Engineer – FinTech Integrations & Cloud

ATS Client; Johannesburg; On-site; ZAR 900,000 - 1,350,000; Full time

Job summary

ATS Client in Johannesburg is seeking a mid-senior Full-stack Developer to revolutionize e-invoicing by building scalable FinTech solutions in the cloud. You will tackle complex backend challenges using Node.js, TypeScript, and AWS, delivering secure, scalable microservices that process high-volume transactions.

You’ll design robust integrations with diverse third-party systems, collaborate with stakeholders to translate business needs into technical solutions, and contribute to a modern,

Qualifications

• 5+ years in backend development using Node.js and TypeScript.
• Experience with BDD/TDD and testing frameworks (Jest, Mocha).
• 3+ years integrating and transforming data from third-party APIs.
• Proficient with SQL/NoSQL databases and AWS cloud services (Lambda, SQS, EventBridge).
• Solid understanding of DevOps, CI/CD and microservices architecture.

Responsibilities

• Design and build robust integrations with diverse third-party systems.
• Develop high-volume transaction processing microservices.
• Collaborate with stakeholders to translate business needs into technical solutions.
• Implement and maintain secure, scalable cloud infrastructure.

Skills

Backend development

BDD/TDD experience

Data integration from APIs

Regulated industries/FinTech exposure

DevOps, CI/CD, microservices

Tools

Node.js

TypeScript

Jest

Mocha

SQL

NoSQL

AWS

Lambda

SQS

EventBridge

CI/CD tooling

Microservices

Job description

ATS Client in Johannesburg is seeking a mid-senior Full-stack Developer to revolutionize e-invoicing by building scalable FinTech solutions in the cloud. You will tackle complex backend challenges using Node.js, TypeScript, and AWS, delivering secure, scalable microservices that process high-volume transactions.

You’ll design robust integrations with diverse third-party systems, collaborate with stakeholders to translate business needs into technical solutions, and contribute to a modern,