Senior Software Engineer in London

Salary: £100,000 per year

Requirements

• Experience writing and maintaining large-scale, robust production software in a fast-changing environment with rapid release cycles.
• Expertise in Node.js and its associated frameworks and ecosystem.
• Extensive experience with Amazon Web Services, including designing, deploying, and maintaining cloud-native applications using the Serverless Framework, such as AWS Lambda, API Gateway, and DynamoDB.
• Competence in database design and optimization, with expertise in relational databases using Amazon RDS such as PostgreSQL or MySQL.
• Expertise with one or more mainstream development and deployment toolchains, including IDEs, source control systems, and CI/CD pipelines.
• Expertise in web architecture and key technologies, including HTTP, DNS, and distributed microservices design.
• Expertise in test-driven development, broader testing, and QA concerns.
• Expertise in developing for operational and non-functional concerns, including monitoring integration, performance testing, scale, availability, resilience, and security considerations.
• Experience working on projects and within professional software development processes, including Agile.
• Competence in translating product requirements into technical solutions.
• Experience using software design patterns effectively.
• Effective leadership and collaboration inside and beyond the team, with the ability to influence diverse stakeholders effectively.
• Ability to take responsibility for delivering work to completion across the team.
• Technical lead experience on at least one medium or large project lasting 3 months or more.
• Desirable: experience working on multiple projects or codebases concurrently.
• Desirable: software engineering or computer science degree, or equivalent experience.
• Desirable: experience mentoring and supporting less experienced team members.
• Desirable: background or interest in supply chain logic, logistics, or med-tech industries.

Responsibilities

• Lead the design and development of software that meets complex product and business needs, primarily building scalable backends with Node.js and the Serverless Framework.
• Review and provide constructive feedback on others' code to ensure best practices in modern cloud-native development.
• Deliver work to successful completion across the immediate team.
• Write appropriate tests using automated test-driven techniques to ensure code quality and coverage.
• Integrate software with monitoring, logging, and support tools within the AWS ecosystem, such as CloudWatch and X-Ray.
• Ensure software works optimally and securely in its operating environment, managing cloud deployments and infrastructure as code.
• Write, review, and take responsibility for technical documentation.
• Lead troubleshooting and resolution of issues throughout the product life cycle, including out-of-hours support for incident resolution.
• Participate in and lead the team's agile planning and delivery process as required.
• Help improve the team's software development methodologies, including pairing, code and documentation reviews, and continuous delivery pipelines.
• Work with project, product, and technical leads to design software and create implementable specifications and tasks at feature and component level.
• Work with third-party providers where necessary, offering direction, support, and documentation.
• Mentor and coach more junior staff, providing technical leadership and direction to colleagues.
• Provide line management for 1 to 2 software engineers if appropriate.
• Keep informed of existing and new technologies and introduce them where appropriate to enhance our operational technology stack.

Technologies

• API
• AWS
• Lambda
• CI/CD
• Cloud
• CloudWatch
• HTTP
• Support
• LESS
• MySQL
• PostgreSQL
• Security
• Serverless
• Web
• Microservices
• NodeJS
• DevOps
• TDD

We are JFA Medical Ltd, a medical supply company focused on delivering innovative healthcare products and building intelligent systems that improve the efficiency, reliability, and scalability of the medical supply chain. We are hiring a Senior Software Engineer to help design, develop, and scale the software systems that power our operations. The role is central to building cloud-native platforms and internal tools that support logistics, inventory management, automation, and operational decision-making across the business. You will work primarily in AWS and Node.js environments, contributing to architecture, development, deployment, and ongoing optimisation of critical systems used throughout the company. Our team offers a vibrant, challenging, and supportive environment where innovation and creativity are encouraged, and hard work is recognized and rewarded. This is an in-person role based in London, with a central Liverpool Street location, a Monday to Friday schedule of 9:00 AM to 5:00 PM, and a salary of £100,000 per year. Benefits include free coffee and tea, free beer taps, a nice office environment, a ping pong table, a football table, casual dress, and a company pension.