Back-End Engineer

Kyra

Location: United Kingdom
Job Type: full-time
Salary: £60K – £70K
Posted: October 6, 2025

Job Description

At Kyra, we’re leading the future of creator marketing—where data, creativity, technology and AI converge to empower creators and drive business impact for the world’s most ambitious brands. Kyra is a full-service, AI-powered, global influencer marketing agency, helping global enterprise brands like H&M, L’Oreal and Amazon connect authentically with audiences through culturally resonant content. With $15M in Series A funding, our flagship proprietary tech platform, Kyra Platform, facilitates our team to deliver this at scale, driving strategic impact with guaranteed performance.

We’re looking for a Back-End Engineer to help design and scale the backbone of our platform. You’ll work with a modern stack, building robust services and integrations that power our products. This role is best suited for someone with solid backend experience who enjoys solving complex problems, working collaboratively, and delivering clean, reliable systems in a fast-paced environment.

What You’ll Do

Design, develop, and maintain scalable backend services using Node.js and TypeScript.
Implement and optimise PostgreSQL databases, ensuring performance and reliability.
Integrate and manage queue systems (e.g. BullMQ) for efficient task processing.
Containerize applications with Docker for consistent deployment.
Collaborate with product and front-end teams to define, design, and ship new features.
Write clean, well-documented code with strong test coverage.
Maintain and extend CI/CD pipelines to support smooth releases.
Ensure backend security, reliability, and observability best practices.

What We’re Looking For

4+ years of professional experience in backend development.
Strong proficiency in JavaScript and TypeScript.
Hands-on experience with Node.js and frameworks such as Express.js.
Deep experience with PostgreSQL (schema design, query optimisation).
Background working with queue systems like RabbitMQ or BullMQ.
Familiarity with AWS services and deploying in a cloud environment.
Experience with Docker and container orchestration.
Proven experience setting up and maintaining CI/CD pipelines.
Understanding of backend security best practices.
Experience with monitoring and observability tools.

Nice to Have

Experience with ElasticSearch for search functionalities.
Familiarity with ClickHouse for analytical data processing.
Knowledge of service-oriented architecture (SOA) and related patterns.
Broader AWS expertise (EC2, S3, Lambda).

Why Join Us?

Build impactful backend services that power products used at scale.
Join a collaborative team that values problem-solving and innovation.
Opportunity to work with modern cloud and data technologies.
Contribute to a fast-growing scale-up with a culture of learning and adaptability.

🎯 Who is this job for?

This role is ideal for a Mid-to-Senior Back-End Engineer with 4+ years of experience in Node.js, TypeScript, and PostgreSQL development. The candidate should be skilled in Docker, AWS, and queue systems like BullMQ, with a focus on scalability, performance, and CI/CD practices. It’s best suited for someone who enjoys building robust, data-driven backend systems in a fast-growing, globally distributed tech environment.

💬 Potential Interview Questions

What’s your experience building scalable backend services with Node.js and TypeScript?
I’ve built modular, high-performance APIs using Node.js and TypeScript with frameworks like Express.js and NestJS, focusing on maintainability and performance.
How do you design efficient database schemas in PostgreSQL?
I normalize data where appropriate, use indexes for query optimization, and leverage tools like EXPLAIN ANALYZE to profile and improve query performance.
How have you used queue systems like BullMQ or RabbitMQ?
I’ve implemented background job queues with BullMQ for asynchronous task processing, ensuring reliable retries, concurrency control, and rate limiting.
What’s your approach to containerizing applications with Docker?
I use multi-stage builds to reduce image size, define environment variables securely, and configure Docker Compose for local development and testing.
How do you implement CI/CD pipelines for backend services?
I use GitHub Actions or Jenkins for automated testing, linting, building, and deployment, ensuring smooth rollouts with zero downtime.
What practices do you follow to secure backend APIs?
I implement authentication (JWT/OAuth), validate inputs, use parameterized queries, enforce HTTPS, and follow the principle of least privilege in AWS.
How do you ensure observability in distributed systems?
I integrate logging (Winston, Pino), metrics (Prometheus), and tracing (OpenTelemetry), enabling proactive monitoring and debugging.
What’s your experience deploying and maintaining services on AWS?
I’ve deployed using EC2 and ECS, used S3 for storage, and set up load balancers and CloudWatch for monitoring and auto-scaling.
How do you handle data-intensive operations or analytics workloads?
I offload heavy analytics to dedicated systems like ClickHouse or use caching and denormalized tables to optimize read performance.
What’s your strategy for ensuring reliable releases and system stability?
I maintain strong test coverage, use feature flags for gradual rollouts, and implement health checks and rollback mechanisms in CI/CD pipelines.

📋 Job Summary

Kyra, a global AI-powered creator marketing agency trusted by brands like H&M, L’Oréal, and Amazon, is hiring a remote Back-End Engineer to scale the backbone of its flagship Kyra Platform. You’ll design and build services using Node.js, TypeScript, PostgreSQL, Docker, and AWS, ensuring performance, reliability, and seamless integrations. The role offers £60K–£70K, flexible remote work, and the chance to shape technology driving data-driven influencer campaigns at scale. Join a fast-growing, creative tech team where innovation, collaboration, and impact meet.