Lead 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
• Collaborate closely with Product, QA, DevOps, and distributed engineering teams, actively participating in Agile ceremonies to align on delivery and product goals
• 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
• Support product growth by maintaining clean, maintainable code and demonstrating strong ownership over delivered solutions

Requirements

• 7+ 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
• 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
• Practical experience working in Agile or Scrum environments with strong clean code practices and participation in constructive code reviews
• Effective collaboration and communication skills in English, enabling productive work across distributed and multicultural teams
• Advanced experience with AWS ecosystem patterns such as API Gateway integrations, retries and DLQs, and event-driven architectures (nice-to-have)
• Practical experience with parallel and concurrent processing techniques such as queues, worker pools, and asynchronous task execution (nice-to-have)
• Working knowledge of SQL and NoSQL databases including PostgreSQL and MongoDB, with familiarity in indexing strategies and basic query optimization (nice-to-have)
• Familiarity with observability and monitoring tools including logging, metrics, and distributed tracing solutions such as Grafana or NewRelic (nice-to-have)
• Practical experience implementing GraphQL resolvers and schema stitching (nice-to-have)
• Familiarity with Infrastructure as Code approaches such as Terraform or similar tooling (nice-to-have)
• Working knowledge of containerization and orchestration technologies such as Docker and Kubernetes for local development and CI environments (nice-to-have)
• Interest in advanced testing practices including Test-Driven Development, contract testing, and visual regression testing (nice-to-have)
• Familiarity with event-driven systems and messaging platforms such as Kafka or AWS EventBridge (nice-to-have)
• Basic knowledge of application security fundamentals including CORS, OWASP principles, and authentication standards such as JWT or OIDC (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.

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