Middle JS Full Stack Engineer

About The Role
In this role, you will design and build scalable full-stack applications, shaping architecture and delivering cloud-native tools that help retail teams detect stock issues, prioritize actions, and measure improvements in product availability. Your work turns operational and inventory data into intuitive products that help stores quickly identify discrepancies and improve on-shelf availability.
Our client is one of the UK’s largest retail groups, operating hundreds of supermarkets and convenience stores and serving millions of shoppers nationwide, with a strong presence across grocery, banking, and general merchandise.
Responsibilities
Build end-to-end product features across React, Node.js with TypeScript, and serverless components to deliver full-stack functionality
Improve system performance, scalability, and maintainability by optimizing frontend and backend implementations and refining architectural design
Implement REST APIs using Node.js and TypeScript and integrate with GraphQL services where required to support application functionality
Develop AWS Lambda functions and configure Amazon API Gateway, ensuring proper CORS handling for secure and reliable service access
Apply effective testing practices by implementing unit, integration, and end-to-end tests to maintain application reliability and quality
Enhance application architecture by applying clean abstractions, SOLID principles, and reduced coupling across system components
Use observability tools including logs, metrics, and tracing to troubleshoot issues and maintain production stability
Contribute to CI/CD pipeline improvements, participate in code reviews, and promote engineering best practices across the team
Requirements
4+ years of commercial software development experience
Strong proficiency with React, including practical use of Hooks such as useState, useEffect, useMemo, and useReducer while consistently applying the Rules of Hooks
Solid understanding of React architectural patterns, including the ability to explain and compare Higher-Order Components and Hooks
Strong proficiency with Node.js and TypeScript, including asynchronous programming with callbacks, Promises, async/await, and robust error handling within the Node.js async model
Practical experience with building RESTful APIs and consuming GraphQL services in modern web applications
Knowledge of SQL and NoSQL databases including PostgreSQL and MongoDB, with familiarity in indexing strategies and basic query optimization
Hands-on experience with AWS Lambda, including configuration, handler signatures, API Gateway integrations, and CORS fundamentals
Strong knowledge of software testing strategies, including applying the Test Pyramid with unit, integration, and end-to-end testing
Solid understanding of clean architecture principles, including dependency injection, abstraction, coupling and decoupling, and SOLID design principles
Clear communication skills with Intermediate strong or Upper-Intermediate level of English for effective collaboration in a multicultural team
Advanced experience with AWS ecosystem patterns such as API Gateway integrations, retries and DLQs, and event-driven architectures (would be a plus)
Practical experience implementing GraphQL resolvers and schema stitching (nice-to-have)
Familiarity with event-driven systems and messaging platforms such as Kafka or AWS EventBridge and Infrastructure as Code approaches such as Terraform or similar tooling (nice-to-have)
SoftServe is an equal opportunity employer. Qualified applicants will receive consideration regardless of race, color, ancestry, ethnicity, national origin, religion, sex, sexual orientation, gender identity or expression, age, citizenship, disability, health condition, marital or family status, veteran status, or any other characteristic protected by applicable law.

Work arrangement
Yes