Sr. Software Engineer (AWS) - Backend

About Zeller

At Zeller, we’re champions for businesses of all sizes, and proud to be a fast-growing Australian scale-up taking on the ambitious goal of reimagining business banking and payments.

We believe in a level playing field, where all businesses benefit from access to smarter payments and financial services solutions that accelerate their cash flow, help them get paid faster, and give them a better understanding of their finances. So we’re hard at work building the tools to make it happen.

Zeller is growing fast, backed by leading VCs, and brings together a global team of passionate payment and tech industry professionals. With an exciting roadmap of innovative new products under development, we are building a high performing team to take on the outdated banking solutions. If you are passionate about innovation, thrive in fast-paced environments, embrace a challenge, hate bureaucracy, and can’t think of anything more exciting than disrupting the status-quo, then read on to learn more.

Role , Responsibilities and experiences :

Analytical and be able to work with fuzzy requirements

Methodologically translate discussions with stakeholders, documents, own researchfindings into technical designs and implementation stepsPrior

Experience in handling a team of software engineers.Build to last and go production mindset versus build as proof-of-concept

Strong background in softwareengineering and design patterns Experience in microservices and serverless architecture

Knowledge in architecture patterns such as; CQRS, event-sourcing Design, develop, and deploy microservices and serverless applications using Node.js, TypeScript, and AWSUnit tests using Jest -, along with Supertest and Postman as supporting tools.

Experience with NestJs Good knowledge in multi-threaded and socket programming Instinctive desire to maintain code quality ,tidiness and zero technical debtStrong understanding of testing practices (TDD / BDD), with tools like Jest , Supertest , and Postman Good with API and its design / protocol e.g. Restful, Websocket, SOAP

Good understanding of Request / Response vs Async protocol Familiarity with production-grade monitoring, logging, and alerting

Can work with various databases to match query and storage requirements e.g. DynamoDB ,SQL, DocumentDB

Build and maintain scalable REST APIs integrated with DynamoDB , S3 , SNS / SQS , Step Functions , and Lambda

Experience in cloud native architecture Understanding of data lake and data warehousing Knowledge in secured coding e.g. OWASP, XSS, CORS Experience in authentication standards and platforms e.g. JWT, OAuth, IdentityFederation

Experience in AWS Cloud environment

AWS Serverless architecture

Microservices

Blue Green Deployments

Own CI / CD processes using CodePipeline,

CodeBuild, and CodeDeployInfrastructure As a Code (IAC) : Terraform, Cloudformation

AWS Devops SNS, SQS, EventBridge, Step Functions ElastiCache Loading Balancing, Route53, CloudFront, ECS,ECR, Auto-Scaling S3, RDS,

DynamoDB,DocumentDB CodePipeline, CodeBuild, CodeDeploy

Improve observability using CloudWatch, X-Ray, and other monitoring tools

Proven track record in developing and maintaining mission-critical high-load productionsystems with SLA 99.999%

Proven track record in supporting rapid and agile product deployments to different Contribute to and evolve our technical architecture and engineering processes

Participate in system design and architecture reviewsenvironments - dev, test, stress-testing, staging / production.

Attributes :

Loves challenging the status-quo

Ability to work autonomously yet collaboratively

Prepared to be bold yet consistent with your engineering principles

Logical, ethnical, mature and responsible

Fast learner, humble and loves to share knowledge

Calm and exercises positive level of stress in exceptional circumstances such as;production issues, timeline requirements

Qualifications and experience

Minimum of a Bachelor degree in software engineering (or related)

5+ years of working experience in a technical hands on software engineering role

Demonstrable experiences in developing mission-critical systems

Bonus Points

Experience in fintech.AWS Certified Solutions Architect (Associate or Professional)

Experience in working within a high-growth environment

Experience in other programming languages

Experience in payments

Exposure to Domain-Driven Design (DDD)Experience with PCI compliant environments (PCI-DSS, etc)