Senior Software Engineer

Ctrl Alt; Belfast; Hybrid; GBP 35,000 - 65,000; Full time

Job summary

A leading technology company in the UK is seeking a Software Engineer to design and build high-performing solutions for financial applications. You'll work on APIs, collaborate with a talented team, and contribute to innovative B2B infrastructure solutions. This role requires significant experience in backend frameworks like TypeScript and JavaScript, with additional technical skills in React and NestJS being advantageous. The company offers competitive benefits, including stock options and flexible working conditions.

Benefits

Generous stock options

Private health insurance

24 days of annual leave plus public holidays

Flexible additional time off

Qualifications

• 5+ years experience as a Software Engineer.
• Proficiency with TypeScript / JavaScript backend frameworks.
• Experience in security-first technical architecture.

Responsibilities

• Design, build and maintain scalable solutions.
• Collaborate with team members and engineers.
• Mentor engineers and advocate best coding practices.

Skills

TypeScript / JavaScript

RESTful API development

Agile methodologies

Excellent communication skills

Tools

NestJS

React

CI / CD

Job description

Salary : £35,000 - 65,000 per year

Requirements

• 5+ years experience as a Software Engineer
• Proficiency working with TypeScript / JavaScript backend frameworks (Express, NestJS or similar)
• Comfortable writing backend code to be performant and efficient
• Experience building RESTful application interfaces and designing APIs
• Experience working as a part of a multi-person development team that utilizes automated testing, CI / CD pipelines and peer reviews in an Agile Environment
• Strong engineering principles (nice to have)
• Excellent communication skills - written and verbal (nice to have)
• Experience in security-first technical architecture (nice to have)
• Experience in React and NextJS (nice to have)

Responsibilities

• Design, build and maintain high performing, flexible and scalable solutions
• Build upon our existing app to create products and features that help our users understand their investments, manage their portfolios and participate in voting rights of their assets
• Build APIs for our partners to access and place orders on our platform
• Take a loosely defined problem through to a valid, technically sound, thoroughly documented, tested, and implemented software solution
• Collaborate with team members and other engineers across the company
• Advocate best coding practices to raise the bar for you, your team and the company
• Mentor engineers on your team supporting them in their growth

Technologies

• Backend
• CI / CD
• JavaScript
• NestJS
• NextJS
• React
• Security
• TypeScript
• Blockchain
• CTO
• Support
• MacBook

More

At Ctrl Alt, we combine groundbreaking technology and expert financial engineering to provide innovative B2B infrastructure solutions that make structuring and investing in alternative asset classes efficient, cost-effective, and accessible. Since our launch in 2022, we have established ourselves as leaders in the space with over $325 million of assets tokenized. We offer generous stock options and private health insurance, alongside 24 days of annual leave plus public holidays, with flexibility for additional time off. Join us in our state-of-the‑art central office in Belfast or Dundalk and be part of a high‑growth startup where your contributions matter to shaping the industry.

last updated 50 week of 2025