Senior Backend Engineer – Core Platform (AI Native)

Murmuration; Manchester; Hybrid; GBP 70,000 - 85,000; Full time

Benefits offered by this job

Hybrid working from Manchester office

Company pension scheme

Job summary

Murmuration is building a modern backend platform for credit unions, with an AI-native approach. As a Senior Backend Engineer, you’ll help design, build, and ship core backend features while shaping architecture and standards.

You’ll work closely with product and design teams, own substantial parts of the codebase, and apply AI tooling to accelerate delivery without compromising quality, security, or reliability. This role is based in Manchester with hybrid working.

Qualifications

• Experience designing and implementing APIs.
• Strong background in Node.js backend systems.
• Experience with database technologies (PostgreSQL/MySQL/SQL Server).
• Experience integrating third-party services.
• Fluency with AI coding tools.
• Strong fundamentals: testing, version control, CI/CD, secure coding.
• Comfortable in early-stage startups with ownership.
• Interest in fintech, payments, or financial inclusion.

Responsibilities

• Design, build, and ship backend features (APIs, event queues + producers and consumers, databases).
• Use AI coding tools to work quickly, without dropping standards for code quality, testing, and security.
• Build AI features into the product (assistants, automation, document processing).
• Design and consume REST/GraphQL APIs that connect our platform to CBS, payments, and third-party services.
• Take features from design through implementation, testing, deployment, and support.
• Have a say in architecture and technical decisions as part of a small, senior team.
• Write automated tests, review other people's code, and help set the engineering standards here.
• Work closely with product, design, and the platform and payments engineers.

Skills

Database tech

APIs design/implementation

Node.js

AI coding tools

Ownership & startup

Fintech interest

AI/LLM features

Tools

Cloud platforms AWS/Azure/GCP

Containers

Infrastructure as Code

Job description

As a Senior Backend Engineer at Murmuration, you'll build the backend platform to support the client products that credit unions and their members use every day. We work in an AI-native way: we expect you to be fluent with AI coding tools, and you'll also help build AI features into the product. Reporting to the Chief Technology Officer, you'll be one of the first engineers here, with a real say in the product and how it's built.

About Murmuration

Murmuration is a new technology company building the core platform that credit unions run on. We provide the software, payments, and data infrastructure that lets a credit union offer its members modern digital banking without having to build or run the technology itself.

Credit unions are member-owned and rooted in their communities, but many still operate on systems that are decades old, which limits what they can offer their members. We're building the alternative.

We're a new company, putting our platform and our first engineering team in place now, with the backing of an established group. For people who join early, that means a real say in the product, the architecture, and how the company works.

What you'll be doing

• Design, build, and ship backend features (e.g. APIs, event queues + producers and consumers, databases) of our platform
• Use AI coding tools to work quickly, without dropping standards for code quality, testing, and security
• Build AI features into the product (assistants, automation, document processing) where they add genuine value for members and/or the business
• Design and consume REST/GraphQL APIs that connect our platform to CBS, payments, and third-party services
• Take features from design through implementation, testing, deployment, and support
• Have a say in architecture and technical decisions as part of a small, senior team
• Write automated tests, review other people's code, and help set the engineering standards here
• Work closely with product, design, and the platform and payments engineers

What you'll bring to Murmuration

• Strong experience with database technologies (e.g. Postgres, MySql, SqlServer)
• Strong experience designing and implementing APIs
• Strong experience with Node based backend systems
• Experience integrating third-party services
• Fluency with AI coding tools as part of your day-to-day work, and a sensible view on where they help and where they don't
• A strong grounding in the fundamentals: testing, version control, CI/CD, and secure coding
• Comfortable working at an early stage, with a lot of ownership
• An interest in fintech, payments, or financial inclusion

Standout candidates will also...

• Experience in fintech, banking, payments, or another regulated or high-trust domain
• A track record of shipping AI/LLM features into production
• Experience with cloud-native development (AWS/Azure/GCP), containers, and infrastructure-as-code
• Experience setting engineering standards or mentoring within a small team
• Salary of £70,000 - £85,000 depending on experience
• 30 days holiday per year plus Bank Holidays
• Hybrid working from our Manchester office
• Company pension scheme
• An early, hands-on role building a new platform and team
• Structured career path with support for ongoing learning and development