Senior Software Engineer (Node & TypeScript)

iO Associates; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

iO Associates seeks a Senior Software Engineer in London to design, build and operate scalable software using TypeScript and Node.js. You will work with AWS and Serverless products, mentor engineers, and lead delivery in a regulated FinTech environment.

The role involves collaborating with clients and senior stakeholders to ensure robust, maintainable solutions and incident readiness in a build-and-run model.

Qualifications

• Senior software engineer with strong Node.js and TypeScript experience.
• Experience with AWS and serverless architectures in production.
• Experience mentoring engineers and delivering technical work in regulated FinTech environments.
• Proven ability to lead delivery in build-and-run models and manage on-call incidents.

Responsibilities

• Design, build and operate reliable, scalable software solutions.
• Develop new functionalities and products using TypeScript and Node.js.
• Collaborate with clients and senior stakeholders to align technical delivery with business goals.
• Contribute to maintenance, monitoring and incident management in production.

Skills

Node.js

TypeScript

Mentoring engineers

Technical delivery leadership

On-call & incident management

Regulated FinTech experience

Tools

AWS

Serverless architectures

MongoDB

Job description

We're working with a FinTech company who are looking for 6 capable, self-driven Senior Software Engineer to help build and evolve their products

Their technology already powers some of the UK's most ambitious fintechs, banks, financial advisers and wealth firms, with close to a million investors relying on their platforms.

In this role you will design, build and operate reliable and scalable, testable and maintainable software solutions, building new functionalities and products using Typescript and Node.js. As this is a senior level role you will be expected operate confidently with clients and senior stakeholders

What we're looking for

• Strong commercial experience with Node.js, specifically TypeScript
• Experience with Amazon Web Services
• Experience with Serverless products
• Experience with document databases, ideally MongoDB
• Experience mentoring engineers
• Experience leading technical delivery in a build-and-run engineering model
• Experience in a structured on-call process and incident management
• Experience working in regulated industries, ideally financial services or FinTech.