Back End Engineer

MillTech; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

25 days annual leave

Medical insurance

Dental insurance

EV scheme

Cycle to work

Enhanced parental leave

Charity day off

Flexible remote working

Job summary

MillTech is seeking a Back-End Engineer to extend and mature our FX and cash management platform. You will work in a cross-functional team with senior engineers, product managers, designers, QA, and domain experts to deliver scalable backend services.

We value autonomy, engineering excellence, and the use of AI across the development lifecycle. This role offers flexible working arrangements, including remote options, and opportunities to influence architecture and technology choices.

Qualifications

• 5+ years of professional work experience as a back-end engineer.
• Strong understanding of Node.js and TypeScript.
• Experience with distributed messaging systems (SQS, RabbitMQ, Kafka).
• Experience with event-driven, micro-service architecture.
• A self-starter able to independently gain knowledge and use new frameworks.
• Comfortable using AI tools in your development workflow.
• Good spoken and written English.

Responsibilities

• Development of back-end web application services
• Contribute to architecture decisions
• Discovery and integration of new technologies
• Support & maintenance of our codebase
• Use AI tools across your development workflow, and share useful techniques with colleagues
• Help to embed a culture of engineering excellence and continuous improvement

Skills

Node.js

TypeScript

APIs & Architecture

Distributed messaging

Event-driven microservices

AI tools in workflow

English communication

Self-starter

Education

Graduate

Job description

Position: Back-End Engineer

Line Manager/Reports to: Engineering Manager/Senior Back End Engineer

Education Level: Graduate

Location: +/- 2 hours from UK

Roles: x2

About MillTech

MillTech provides advanced FX and cash management solutions to increase market access, reduce costs and automate manual workflows.

With a focus on automation, integration and connectivity, we have pioneered an independent risk management and liquidity solution for fund managers, institutions and global corporates, which is purpose-built to deliver best execution at scale. Our end-to-end operational workflow enables automation, standardisation and cost transparency on all FX transactions and cash movements.

A highly secure platform centralises all client FX and cash activities to enhance oversight whilst increasing control, all at no additional costs. It offers quick onboarding routes, multi-bank best execution and hedging management services.

Headquartered in London, the world’s largest FX hub, MillTech provides services to clients in the United Kingdom, United States, Canada, Switzerland, Belgium, Denmark, Ireland, Luxembourg, Norway and Liechtenstein. MillTech is authorised and regulated by the UK’s Financial Conduct Authority (FCA FRN 911636) and registered with the USA’s National Futures Association (NFA).

Your Mission

Your mission is to shape and extend our existing platform into a cohesive set of high-quality, scalable products, while championing engineering excellence across the business. This means improving what exists, identifying gaps, and driving forward solutions that balance speed, reliability, and long-term sustainability.

We’re a team that is embracing AI across the entire software development lifecycle, and so we’re looking for someone who is comfortable working this way and wants to push it further. You will work within a cross-functional product team — alongside senior engineers, product managers, designers, engineers, QA, and domain experts — to iteratively refine and deliver solutions that align with both customer needs and our internal architecture.

Your responsibilities in this role will include:

• Development of back-end web application services
• Contribute to architecture decisions
• Discovery and integration of new technologies
• Support & maintenance of our codebase
• Use AI tools across your development workflow, and share useful techniques with colleagues
• Help to embed a culture of engineering excellence and continuous improvement

Required skills:

• A high degree of personal honesty and integrity
• 5+ years of professional work experience as a back-end engineer
• Strong understanding of Node.js and TypeScript
• Strong understanding of modern web application development (APIs, Services, Architecture, Security)
• Experience with distributed messaging systems (SQS, RabbitMQ, Kafka, etc.)
• Experience with event-driven, micro-service architecture
• A self-starter able to independently gain knowledge and use new frameworks
• Comfortable using AI tools in your development workflow
• Good spoken and written English
• A brilliant mind. A people-person (we need your mind and skills, but also your smile and personality)

Additional skills you may have:

• Experience building FX, Cash Management or Interest Rate financial systems
• Experience developing cloud native solutions in AWS (strongly valued, but not essential)
• Experience with IaaC
• Experience with Coding Agents and Context Engineering Practices

What we offer in return?

Our commitment is to help you flourish in this role, through support with your professional development, opportunities to be involved in key projects, and exposure to challenges that you may not be offered in a larger organisation. We will provide:

• A competitive salary with annual reviews;
• 25 days’ paid annual leave plus an additional day per year of service;
• Excellent staff development and training opportunities;
• Flexible working arrangements including remote working;
• Medical insurance;
• Dental insurance;
• EV Scheme and Cycle to work scheme;
• Enhanced maternity and paternity leave;
• 1 day off for charity work per quarter and many other benefits!

At MillTech we believe that diversity and inclusion are essential for fostering innovation and building a strong, supportive work environment. We are committed to embedding the best equality and diversity practices into all our activities, making us an inclusive, welcoming, and exciting place to work. We would welcome candidates from all backgrounds and experiences.