Back-End Developer (Senior) 0212

Opensource Intelligent Solutions; Gauteng; Hybrid; ZAR 900,000 - 1,600,000; Full time

Job summary

Opensource Intelligent Solutions seeks a Senior Back-End Developer to own complex backend solutions in a hybrid environment in Pretoria. You will architect, build, optimise and lead, using modern Node.js, AWS Serverless, and cloud-native tech across Lambda, API Gateway, DynamoDB, S3 and more.

You’ll mentor teams, drive improvements, design and operate CI/CD pipelines, IaC with CloudFormation/Terraform, and work in Agile/Scrum contexts to deliver production-ready systems.

Qualifications

• 5+ years of production Node.js experience in serverless environments.
• broad experience with AWS Serverless services including Lambda, API Gateway, DynamoDB, SQS/SNS.
• 5+ years of automated testing experience including unit and end-to-end tests.
• Proven track record leading IT teams and designing scalable backend architectures.
• Strong AWS cloud expertise and knowledge of Kubernetes and serverless technologies.
• Experience with IaC using CloudFormation and/or Terraform.
• CI/CD pipelines experience, preferably GitHub Actions.
• Solid experience with SQL and NoSQL databases.
• Knowledge of cloud networking and on-prem connectivity.
• Design patterns and architecture principles familiarity.
• Experience working in Agile/Scrum environments.
• Ability to work independently and own complex technical solutions.

Responsibilities

• Design, develop and operate production-ready backend applications.
• Architect scalable solutions using Node.js and AWS Serverless tech.
• Lead and mentor other developers and guide technical direction.
• Build and operate CI/CD pipelines and IaC workflows.
• Implement and enforce cloud security patterns and monitoring.
• Collaborate with customers and vendors; produce technical docs.
• Write automated unit and end-to-end tests; ensure reliability.
• Respond to risks and drive issue resolution across systems.
• Work in Agile/Scrum teams and contribute to architecture discussions.

Skills

Node.js

AWS Serverless

Automated testing

Technical leadership

Kubernetes

CloudFormation

Terraform

GitHub Actions

SQL/NoSQL

Agile/Scrum

Independent ownership

CI/CD

Education

Relevant IT degree or equivalent

Cloud certifications (preferred)

Developer Associate cloud certification (minimum)

Tools

AWS Lambda

API Gateway

DynamoDB

Kinesis

SQS/SNS

S3

CloudWatch

Kubernetes

CloudFormation

Terraform

GitHub Actions

Job description

Back-End Developer (Senior)

Location: Menlyn, Pretoria

Working Model: Hybrid - 2 days per week in office

Contract: 3-Year Renewable Contract

Start: ASAP

About the Role

We’re looking for a highly experienced Back-End Developer (Senior) to join a global technology environment where you’ll take ownership of complex backend solutions, influence technical direction and help guide other developers.

This is more than a hands-on development position. We’re looking for someone who can architect, build, optimise and lead.

You’ll work with modern Node.js, AWS Serverless and cloud-native technologies, developing and operating production-ready systems while solving complex challenges across multiple systems.

What You’ll Be Doing

• Design, develop and operate production-ready backend applications.
• Architect scalable solutions using Node.js and AWS Serverless technologies.
• Work extensively with AWS services including:
• Lambda
• API Gateway
• DynamoDB
• SQS/SNS
• Kinesis
• S3
• CloudWatch
• Provide technical leadership and guidance to other developers.
• Influence technical solutions and drive improvements across existing systems.
• Design and operate CI/CD pipelines.
• Implement Infrastructure as Code using CloudFormation and Terraform.
• Work with Kubernetes and serverless compute environments.
• Automate application, infrastructure and configuration deployments.
• Design solutions using both SQL and NoSQL databases.
• Apply appropriate software design and architecture patterns.
• Implement cloud security patterns across solutions and deployments.
• Monitor and operate applications using AWS CloudWatch.
• Build and maintain comprehensive automated unit and end-to-end tests.
• Solve complex technical problems spanning multiple systems.
• Identify risks and impediments and proactively drive resolution.
• Liaise with customers, technical teams and external vendors.
• Produce and maintain technical documentation.
• Mentor, coach and proactively share knowledge across teams.
• Work within an Agile/Scrum environment.

Essential Skills & Experience

• 5+ years' production experience with Node.js in serverless environments.
• 5+ years' hands-on AWS Serverless experience, including Lambda, API Gateway, DynamoDB and SQS/SNS.
• 5+ years' automated testing experience, including unit and end-to-end testing.
• Proven experience leading IT teams.
• Strong hands-on AWS cloud expertise.
• Strong knowledge of Kubernetes and Serverless technologies.
• Infrastructure as Code experience using CloudFormation and/or Terraform.
• CI/CD pipeline experience, preferably using GitHub Actions.
• Strong experience with SQL and NoSQL databases.
• Experience with virtual networking and cloud-to-on-premises connectivity.
• Automated deployment and configuration experience.
• Monitoring and log analytics expertise.
• Strong understanding of Design and Architecture Patterns.
• Experience working within Agile/Scrum environments.
• Ability to work independently and take ownership of complex technical solutions.

Advantageous Skills

• Linear and nonlinear optimisation.
• Design and evaluation of efficient algorithms and complexity theory.
• Performance testing and tuning.
• E-mobility experience.
• Java.

Qualifications

• Relevant IT degree or equivalent practical experience.
• Relevant cloud certifications.
• Developer Associate-level cloud certification preferred as a minimum.
• Professional-level cloud certification would be highly advantageous.

What You Can Expect

• Cutting-edge global technology environments and processes.
• Complex technical challenges with genuine ownership.
• Opportunity to influence architecture and technical direction.
• Modern, state-of-the-art working environment.
• Flexible hybrid working.
• Strong focus on work-life balance.
• Collaboration with dynamic global teams.
• Agile ways of working.
• Opportunities to mentor and develop other technical professionals.
• Long-term opportunity through a 3-year renewable contract.

If you’re the developer others turn to when the problem gets complicated - and you have deep Node.js + AWS Serverless expertise - we want to hear from you.