Lead Software Engineer

StackCX; Cambridge; On-site; GBP 90,000 - 120,000; Full time

Job summary

StackCX is seeking a Lead Software Engineer in Cambridge to own end‑to‑end features across the stack, from backend services to AI pipelines. You’ll collaborate with product, CI, and customer calls, adapting quickly as priorities shift.

The role emphasizes strong engineering ability, rapid learning, and comfort with customers. Experience with Python, AWS, Docker, Pulumi, Terraform, and Postgres is valued, with a focus on production systems and multi‑tenant considerations.

Qualifications

• You don’t need our exact stack. We care more that you’re a strong engineer who picks things up fast.
• If you’ve built and run production systems in another language or framework, we’d like to see your CV.
• It helps if you’ve worked with Python, cloud tooling (Pulumi/Terraform), Postgres, AWS, Docker, and AI/integration work.

Responsibilities

• You’ll work across infrastructure, integrations, AI pipelines, the product, our CI, customer calls, and internal projects.
• You’ll move between them as the work demands.

Skills

Strong engineer

Python

PostgreSQL

Customer interaction

Tools

Docker

Pulumi

Terraform

AWS

Postgres

Job description

What you\'ll be doing

This role suits someone who likes variety. The work spans infrastructure, integrations, AI pipelines, the product, our CI, customer calls, and internal projects. You\'d move between them as the work demands.

You\'ll like it here if

• You\'d rather work across the product than own one narrow slice of it
• You\'re happy picking up something you\'ve not done before
• You\'re drawn to the variety rather than wary of it
• We\'re not expecting all of this on day one, or that you\'ve done it all before.

What you\'ll be using

Backend: Python and Django, on a service-based architecture with a strong focus on multi-tenant data isolation.

Cloud and infrastructure: AWS, managed with Pulumi. ECS/Fargate, Docker, ALB, SQS, S3, Lambda, API Gateway, ElastiCache, WAF, CloudWatch, and more.

What we\'re looking for

You don\'t need our exact stack. We care more that you\'re a strong engineer who picks things up fast. If you\'ve built and run production systems in another language or framework, we\'d like to see your CV.

It helps if you\'ve worked with some of:

• Python, or another backend language you know well.
• Claude Code, Cursor or Codex.
• A relational database like Postgres.
• AWS, or another cloud (ECS/Fargate, Lambda, SQS, S3, or the equivalents).
• Docker.
• Infrastructure as code (Pulumi, Terraform, or similar).
• LLM and AI integrations, or event-driven pipelines. A plus, not a must.
• It\'s also a plus if you\'re someone comfortable working with customers directly.

Why StackCX

You\'d own real features end to end, not tickets off a backlog.

Small team, direct impact. What you ship reaches dealers around the world.

StackCX is a fast-growing AI-powered customer experience platform, helping businesses transform how they manage customer interactions, improve performance, and drive better outcomes. Working with leading automotive and service-based organisations, we provide real-time insights, call analysis, and workflow automation that puts customer experience at the heart of everything.

As we continue to scale, we\'re looking for a Lead Software Engineer to join our team and design the services that take us through the next phase of growth.