Senior Back End Developer (TypeScript)

Slalom, LLC; City of London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A global consulting firm is seeking a Senior Back End Developer to design and implement scalable backend services and APIs using TypeScript. The position involves developing cloud infrastructure on AWS and managing database systems. Ideal candidates will have strong skills in GraphQL, containerisation with Docker, and knowledge of microservices architecture. This role prioritises flexibility and a culture of inclusion within the team.

Benefits

Competitive compensation

Comprehensive benefits package

Flexible work-life balance

Qualifications

• Proven experience in backend development using TypeScript.
• Expertise with AWS services for cloud infrastructure.
• Proficiency in designing GraphQL and RESTful APIs.
• Strong knowledge of database systems, both SQL and NoSQL.
• Experience in containerisation and orchestration technologies.
• Understanding of DevOps practices and CI/CD processes.

Responsibilities

• Design and implement efficient, scalable backend services and APIs.
• Develop and maintain database schemas and data models.
• Write clean, maintainable, and well-documented code.
• Design GraphQL APIs for efficient data access.
• Engineer secure cloud infrastructure on AWS.

Skills

Backend development using TypeScript

AWS services (API Gateway, Lambda, Fargate)

GraphQL API design

SQL and NoSQL database knowledge

Microservices architecture

Containerisation with Docker

Orchestration with Kubernetes or AWS ECS/EKS

CI/CD pipelines

Infrastructure as code (Terraform)

Job description

Senior Back End Developer (TypeScript)

Location: London / Hybrid

Company: Slalom – a global, human‑centric business and technology consulting firm focused on delivering innovative, end‑to‑end solutions through technology and strategy.

Responsibilities

• Design and implement efficient, scalable backend services and APIs using TypeScript and modern architectural patterns.
• Develop and maintain database schemas and data models, supporting both SQL and NoSQL systems.
• Write clean, maintainable, and well‑documented code, following best practices and coding standards.
• Design and implement GraphQL APIs, ensuring efficient data access and strong typing.
• Drive containerisation strategies using Docker and orchestrate deployments via Kubernetes or AWS ECS/EKS.
• Engineer secure, scalable cloud infrastructure on AWS, leveraging services such as API Gateway, Lambda, AppSync, Fargate, DynamoDB, and RDS.
• Establish and evolve CI/CD pipelines using GitHub Actions, Terraform, and AWS‑native tooling.
• Foster a culture of inclusion and engineering excellence, mentoring others and promoting collaboration, diversity, and well‑being.

Qualifications

• Proven experience in backend development using TypeScript, with a strong grasp of scalable API design.
• Hands‑on expertise with AWS, including services such as API Gateway, Lambda, AppSync, Fargate, DynamoDB, and RDS.
• Proficiency in GraphQL and RESTful API design, with practical experience in schema development and performance tuning.
• Strong database knowledge, including both SQL and NoSQL systems.
• Experience with microservices architecture, containerisation (Docker), and orchestration (Kubernetes or AWS ECS/EKS).
• Solid understanding of DevOps practices, including CI/CD pipelines, infrastructure as code (Terraform), and system observability.
• A collaborative mindset, with strong communication skills and a passion for mentoring and knowledge sharing.

Culture & Benefits

Slalom prioritises flexibility, allowing team members to balance professional and personal commitments while collaborating on high‑impact projects. Our people‑first approach focuses on inclusion, diversity, equity and empathy, fostering an environment where everyone can thrive. Competitive compensation and a comprehensive benefit package support our team’s well‑being.

Slalom prides itself on helping team members thrive. If you require any assistance with reasonable adjustments during the recruitment process, please contact us; we are happy to help.