Full Stack Technical Lead - Capability

ECA

United Kingdom

Hybrid

GBP 90,000 - 130,000

Full time

5 hours ago

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Benefits offered by this job

Enhanced Pension

25 days annual leave

Health, Life Insurance + EAP

Annual Bonus Scheme

Long Service Awards

ClassPass

Enhanced Family Leave

Personal development funding

Season Ticket Loan

Hybrid Work Environment

Cycle to Work

Free Eye Test

Job summary

ECA is seeking a Tech Lead to head up our Capability squad, owning the shared foundations of our multi-tenant B2B SaaS platform. You’ll balance leadership with hands-on coding, setting technical direction and ensuring quality across what the squad ships.

You’ll work mainly in Node.js and TypeScript on AWS with PostgreSQL behind it, tackle non-functional requirements from day one, and shape how AI helps our engineering workflow and the platform’s evolution as the business grows.

Qualifications

8+ years of software engineering with backend focus.
Strong hands-on experience with Node.js, TypeScript and SQL.
Experience designing multi-tenant SaaS platforms.
Leadership and mentoring of engineers.

Responsibilities

Lead, mentor and grow a squad of developers while staying close to the code.
Design and build back-end services and APIs for multi-tenant environments.
Own technical direction for platform foundations and standards.
Collaborate with Product and other squad leads to translate requirements into technical solutions.
Raise testing standards with TDD and performance testing.
Ensure observability and incident response readiness.

Skills

Node.js

TypeScript

SQL (PostgreSQL)

API design

Cloud-hosted distributed systems

Tools

Keycloak

AWS

Terraform

GraphQL

Job description

Want to lead a team without giving up the code?

We’re looking for a Tech Lead to head up our Capability squad. Capability owns the shared foundations of ECA’s multi‑tenant B2B SaaS platform, the back‑end services every other product team builds on.

This isn’t a role where “Tech Lead” means spending your week in meetings and updating spreadsheets while you drift away from engineering. You’ll lead a team of developers, set technical direction and own the quality of what the squad ships. You’ll also stay hands‑on, writing code, reviewing it and working through the hardest problems yourself. Increasingly, you’ll also help us answer a bigger question: what does a genuinely AI‑first engineering team look like?

What you’ll be getting stuck into

Capability is where our platform’s non-functional requirements live. If our services are slow, insecure, fragile or hard to operate, every product team feels it. Your squad makes sure they aren’t.

You’ll own areas such as:

Identity and access management: authentication, SSO, roles and permissions, built on Keycloak
Tenant isolation and multi‑tenant data architecture
Platform services and integrations that other squads depend on
Performance, scalability, resilience, security and observability across the platform
You’ll work mainly in Node.js and TypeScript on AWS, with PostgreSQL behind it, and you’ll help shape how the platform evolves as the business grows.

You’ll also:

Lead, mentor and grow a squad of developers while staying close to the code
Treat non-functional requirements as part of the design from the start, not something to deal with before go‑live: performance budgets, availability, security, auditability, operability and cost
Design and build back‑end services and APIs that are scalable, maintainable and secure in a multi‑tenant environment
Own technical direction for the platform foundations and help define what “good” engineering looks like across ECA
Work closely with Product, Delivery and the other squad leads to turn requirements into sound technical solutions, especially where the work cuts across teams
Give realistic estimates and challenge optimistic ones when needed
Step into difficult or stalled work, work out what’s blocking it and get delivery moving again
Raise the bar on testing, including TDD, automated testing, and load and performance testing
Make sure what your team builds is observable and supportable in production, and help run incident response and learning when things go wrong
Use AI throughout the software development lifecycle, from design and build through to testing and review
Help shape how AI coding agents fit into our engineering workflow, including the guardrails, review standards and governance that make them safe to use on platform‑critical code

Job requirements

What we’re looking for

You’ll probably have 8+ years of software engineering experience, with a strong back‑end bias. We care more about what you’ve built, led and improved than about the number of years.

You’ll need strong hands‑on experience with:

Node.js
TypeScript
SQL (ideally PostgreSQL)
API design
Cloud‑hosted distributed systems

You’ll understand what it takes to run a multi‑tenant SaaS platform in production. You’ll be able to explain the trade‑offs between tenancy models, design for horizontal scale, reason about failure modes, and know where caching, queuing and asynchronous processing help and where they hurt.

Non‑functional requirements should come naturally to you. You’ll have defined, measured and improved things like latency, throughput, availability and security posture, and you’ll know how to make them visible through logging, metrics and tracing.

Identity and access management experience is particularly important: SSO, OIDC, SAML, OAuth, authentication and authorisation, RBAC, tenant isolation, and tools such as Keycloak.

Above all, we’re looking for someone who combines technical depth with leadership. You can make a difficult architectural decision, explain it clearly, unblock an engineer and still get stuck in when the situation calls for it.

You’d rather unblock three engineers than be the hero on one ticket.

You’ll also need to be eligible to work in the UK.

Even better if..

You’ve worked with some of the following: AWS (ECS/EKS, Aurora), Terraform, GraphQL, event-driven or workflow‑orchestration patterns, observability tooling, React, .NET Core or C#.

If you’ve built or hardened authentication and authorisation for a SaaS product with enterprise customers, we’d love to hear about it.

And if you’re already experimenting with AI IDEs, coding agents or AI‑assisted development, and have opinions on how to use them responsibly on critical code, we definitely want to hear about it.

ECA is evolving its technology and products, and this role sits right in the middle of that journey. You’ll have the opportunity to influence how we build, how we deliver and how we use AI within engineering, rather than simply inheriting a finished playbook.

So, if you’re a strong Full Stack engineer who enjoys leading people, solving difficult platform problems and still actually building things, this could be a very interesting next move.

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