Lead Backend Engineer (AWS / Serverless)

Job Title: Lead Backend Engineer (AWS / Serverless)

Location: Liverpool – Hybrid

Report to: COO & Board Direct

Reports: Agencies and Contractors

£90,00 -£100,000 package

Note : 7+ years of backend or platform engineering experience

Strong hands-on experience building production systems in AWS (serverless preferred)

Please apply if you have the correct experience to meet the job specification.

Role Overview

We’re looking for a senior, hands-on Lead Integration Engineer & Developer to further develop and evolve our integration platform—connecting core internal services with external systems and partners.

This is a high-impact individual contributor role combining deep technical expertise with architectural leadership. You’ll spend a significant portion of your time writing production code, while also setting direction, defining standards, and mentoring engineers across the integration domain.

Our platform is centred around HubSpot and a growing ecosystem of internal services and partner integrations, built on a modern event-driven architecture in AWS.

You’ll play a key role in shaping how we design APIs, handle events, ensure reliability, and scale integrations across the business.

What You’ll Be Doing

Own the Integration Architecture

• Design and evolve the architecture for a scalable integration platform (Hubspot) Define patterns for event-driven workflows and asynchronous processing Establish best practices for reliability (idempotency, retries, failure handling, data consistency) Set standards for how internal services integrate with external APIs and third-party systems

Build the Platform (Hands-On)

This is a hands-on engineering role. You will actively design, build, and operate production systems.

• Develop serverless services using AWS (Lambda, API Gateway) Build event-driven pipelines using EventBridge, SQS, and SNS Implement robust API integrations and webhook processing Design and implement data mapping and transformation between systems

Integrate External Systems

• Build and maintain integrations with platforms such as HubSpot and other partner systems Design resilient, scalable API integrations Manage schema evolution and ensure long-term integration stability

Improve Reliability & Observability

• Implement monitoring, alerting, and observability across integration workflows Diagnose and resolve complex issues in distributed systems Continuously improve failure recovery and system resilience Apply best practices such as dead-letter queues, retries, and idempotent processing

Technical Leadership

• Define and promote engineering best practices across the integration domain Mentor and support engineers working on integration services Influence architectural decisions across teams and services Act as a subject matter expert for event-driven and distributed systems

Technology Environment

Core Stack

• AWS (Lambda, API Gateway, EventBridge, SQS, SNS) Node.js / TypeScript and Python

Data & Infrastructure

• DynamoDB, RDS Infrastructure as Code (Terraform, CDK, or CloudFormation) CloudWatch and observability tooling

Integrations

• HubSpot (CRM) Internal microservices and external partner APIs

What We’re Looking For

Required Experience

• 7+ years of backend or platform engineering experience Strong hands-on experience building production systems in AWS (serverless preferred) Proven experience designing and operating distributed, event-driven systems Experience building and maintaining API integrations with third-party platforms Experience owning systems end-to-end (design, delivery, operation, and iteration)

Technical Expertise

• Event-driven architectures and messaging systems (e.g. EventBridge, SQS, SNS, Kafka) Designing for failure retries, idempotency, backoff strategies, DLQs Observability, monitoring, and debugging in distributed systems Data modelling, transformation, and schema evolution across systems

Leadership & Collaboration

• Demonstrated ability to lead technical design and influence architecture Experience mentoring engineers and raising engineering standards Strong communication skills, with the ability to work across technical and non-technical stakeholders Comfortable operating in a fast-moving, evolving environment

Desirable Experience

• Experience integrating with CRM platforms (HubSpot preferred) Experience building or owning internal integration platforms Experience handling high-volume event ingestion or real-time data pipelines Familiarity with containerized services (e.g. Docker, ECS, Kubernetes) Experience with modern observability platforms (e.g. Datadog, OpenTelemetry)

Success in This Role

In your first 6–12 months, you will:

• Establish clear architectural patterns and standards for integrations Deliver scalable, reliable event-driven integration workflows Improve resilience across the platform Become a trusted technical leader within the business Ensure Data produced is sufficient for Board level analytics

Why Join Us?

• Opportunity to shape and lead enterprise-wide analytics strategy High visibility role with direct impact on business outcomes Collaborative, forward-thinking culture focused on innovation and growth