Senior Software Engineer- Microservices Modernization & Serverless GraphQL

Do you have a passion for building high-performance scalable backend systems Are you a senior engineer with a deep expertise in both Java and backend Typescript/ If so we want to hear from you!

We are seeking a Senior Backend Engineer to join our growing team and play a key role in the development of our retail clients backend infrastructure on this role you will leverage your extensive experience to design develop and implement complex backend and cloud-first services. You will help build out the backend technology stack with a focus on AWS cloud solutions microservices and GraphQL.

We are leaders in the customer loyalty and rewards space with our loyalty and rewards software that touch 10 million individuals monthly. We leverage this cutting-edge experience and agility to foster deep collaboration partnerships with key clients in our Yoyo Collab business unit. Yoyo Collab is our professional services business unit where our team works on secondment inside large corporates building out their product vision and strategy.

As a Senior Backend Engineer you will work in the Yoyo Collab business unit with a team who deliver remarkable solutions to one of our key clients in the Retail and Financial Services sector.

Your projects will focus on both expanding and refining the client solution in order to cater to the ever-changing needs of end consumers but also to sustain the clients competitive edge in the order to achieve this you will be working on multiple internal systems including a GraphQL server (Typescript) an Integration Server (Java microservices) as well as integrations to 3rd party systems.

Youll collaborate with other Engineers Product Owners Architects and Systems Analysts as well as Mobile Web and Cloud Developers to ensure a constant and valuable evolution of the platform while delivering remarkable solutions to our clients through innovative robust and elegant mobile solutions and web portals. 

Minimum Requirements

• Java EE 5 years experience

• Spring Framework 5 or higher

• Wildfly or Glassfish Experience

• Strong SQL background with ERD design

• Experience with various web and integration architectures

• Test Driven Development

• Distributed Version Control - Git

• Experience with Typescript/ backend services

• Working knowledge of AWS cloud services (Lambda API Gateway SQS DynamoDB EKS)

• Experience building or maintaining GraphQL APIs (Apollo Server preferred)

• Exposure to serverless and event-driven architectures

• Experience with microservices or monolith-to-microservices migration

Duties/ Responsibilities

• Consistently live out act work and exhibit behaviours aligned to and congruent with company values.

• Design develop and implement high-performance scalable backend services using Java TypeScript/ AWS Cloud Services and related technologies. 

• Contribute to the modernisation of the existing application server to a serverless micro-services platform

• Design extend and maintain the serverless GraphQL platform including schema evolution resolver development and integrations with third-party systems.

• Engage in technical discussions with cross-functional teams propose innovative solutions and champion best practices for backend and cloud service development.

• Conduct code reviews mentor junior engineers and foster a culture of continuous learning.

• Prototype and drive technical solutions to larger-scale technical issues such as performance optimisation technical debt reduction and cloud-native architectural improvements.

• Driving continuous improvements and digital innovation methodologies aligned to business strategy.

• Stay up-to-date on the latest technologies and trends and evaluate their potential for improving our backend infrastructure.

Knowledge Skills & Aptitudes

• Strong understanding of backend engineering concepts across Java (J2EE/Spring) and TypeScript/ including service-based architectures design patterns data structures and algorithms

• Experience building and consuming web services including REST

• Hands-on experience with backend frameworks and runtimes such as Spring (5) application servers like WildFly and Spring Boot and server-side frameworks like Hono Fastify Middy or Express

• Familiarity with distributed systems and cloud environments particularly AWS services (Lambda API Gateway SQS DynamoDB CloudWatch)

• Experience with both relational and non-relational databases including MySQL MongoDB and DynamoDB

• Practical experience with GraphQL (schema design resolvers Apollo Server)

• Experience with build and delivery tooling such as Yarn Maven Gradle monorepo tools like Nx and CI/CD tooling such as GitHub Actions

• Exposure to both microservices and serverless architectural patterns including messaging systems like Kafka Kinesis or Amazon SQS

• Experience with containerisation (Docker/Kubernetes) or infrastructure-as-code tooling (Terraform/Terragrunt) is advantageous

• Comfortable producing and sharing design and technical documentation using tools such as UML Markdown Confluence or Mermaid

• Strong understanding of secure coding practices backend performance optimisation and defensive coding principles

• Excellent time management analytical and communication skills

• Experience in financial services or related transactional industries is a plus

Qualifications :

• Computer Science/ Information Systems degree/diploma or 7 years equivalent experience

• Certification in Java or related backend technologies is advantageous

• Certification in AWS or other cloud technologies is advantageous

• Proficient with general productivity tools and documentation software (e.g. Microsoft Office Suite Google Workspace Confluence Jira)

Additional Information :

The Perks at Yoyo:

• Learning and development opportunities with exposure to cutting-edge cloud technologies

• Hybrid working arrangement with flexible working hours

• Collaborative supportive team culture with regular opportunities to connect

• On-site barista serving some of the best coffee in town

• Subsidised healthy meals at our in-house café

• Croissant and fruity days in the office

• Weekly socials and an annual social calendar that includes family-friendly events

• Employee wellbeing support through Strove

• Employee rewards programme via Zuzo

• Generous leave policy

Our Yoyo values we are looking for a team member that will always live out and demonstrate behaviours aligned to our values:

• Be extremely customer centric: in everything we do serve and delight our customers using data to continuously improve.

• Be a passionate team player: spiral up be positive bring momentum and energy to those around you leave ego at the door and be teachable.

• Be an owner: be accountable and take responsibility. Find solutions learn from your mistakes and own tasks to completion.

• Be world-class at speed: delivering world leading solutions that delight our clients and customers.

• Be curious and creative: constantly innovating exploring learning stretching ourselves pushing the boundaries and thinking out of the box

Remote Work :

Yes

Employment Type :

Full-time