Senior Backend Engineer — AI-Driven, Microservices in London

Fresha; Greater London; Hybrid; GBP 110,000 - 140,000; Full time

Job summary

Fresha is seeking a Senior Backend Engineer to join our London team, delivering AI-augmented workflows and scalable backend services. You will design and ship features across a polyglot stack, including Ruby, Elixir, GraphQL, TS, and gRPC, while operating in a Kubernetes-driven environment and driving a migration to microservices.

You’ll collaborate with Product, Design, Infra, and mobile teams to ensure robust, observable systems and high-quality user experiences in a fast-paced, autonomous

Qualifications

• 5+ years of experience in product engineering, developer tools, or infrastructure at scale.
• Experience building globally distributed systems.
• Knowledge of event-driven architectures (Kafka).
• Familiarity with languages such as Elixir, Ruby, or TypeScript is a plus.

Responsibilities

• Collaborate closely with Product, Design, Frontend, Infrastructure, and Mobile engineers to take features from discovery to rollout and beyond.
• Be responsible for features from discovery to observability: technical design, implementation, testing, and rollout.
• Design, build, and maintain efficient, scalable, and reliable Ruby/Elixir code.
• Work with a polyglot stack (Ruby, Elixir, GraphQL, TypeScript, gRPC) and modern messaging systems (Kafka).
• Operate within a Kubernetes-driven environment as we continue moving to a microservice architecture.
• Embrace Domain-Driven Design to build high-quality, impactful products from inception to delivery.

Skills

AI-Augmented Workflow

Globally distributed systems

Kafka

Elixir/Ruby/TypeScript

Backend engineering

Tools

Kubernetes

GraphQL

gRPC

Job description

Fresha is seeking a Senior Backend Engineer to join our London team, delivering AI-augmented workflows and scalable backend services. You will design and ship features across a polyglot stack, including Ruby, Elixir, GraphQL, TS, and gRPC, while operating in a Kubernetes-driven environment and driving a migration to microservices.

You’ll collaborate with Product, Design, Infra, and mobile teams to ensure robust, observable systems and high-quality user experiences in a fast-paced, autonomous