Senior Software Engineer

Ctrl Alt; Belfast City District; Hybrid; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Stock options

Private healthcare

26 days annual leave

MacBook and equipment

Salary sacrifice schemes

Modern offices in London and Belfast

Job summary

Ctrl Alt is seeking a Senior Software Engineer to join our Belfast or London team. You’ll design, build and maintain high‑performance, scalable solutions in a fast-paced scale‑up environment, shaping the future of on‑chain infrastructure in digital capital markets.

You'll work with TypeScript/JavaScript backends, build robust RESTful APIs, and collaborate across engineering, product, and leadership to deliver impactful features with strong testing and CI/CD practices.

Qualifications

• 5+ years of experience as a Software Engineer.
• Proficiency with TypeScript/JavaScript backend frameworks (Express, Next.js or similar).
• Experience writing performant backend code.
• Experience building RESTful APIs and API design.
• Experience in Agile environments with CI/CD and peer reviews.

Responsibilities

• Design, build and maintain high performing, scalable solutions.
• Extend the app with features to help users understand investments and manage portfolios.
• Build APIs for partners to access and place orders on our platform.
• Turn loosely defined problems into solid, tested software solutions.
• Collaborate with engineers across the company.
• Advocate coding best practices to raise the bar for you and your team.
• Mentor engineers on your team.

Skills

5+ years experience

TypeScript/JavaScript

Backend development

RESTful APIs

CI/CD Agile

React/React Native

Tools

Express

NextJS

Job description

Contact us

Senior Software Engineer

Contract: Full-time Location: Belfast, UK OR London, UK Salary: DOE Team: Engineering

About Ctrl Alt

Ctrl Alt is designing and operating the on-chain infrastructure powering digital capital markets globally. We bring together a unique blend of expertise in financial markets and cutting-edge in-house technology to deliver tailored, compliant solutions in the alternative assets space. Since launching in 2022, we’ve tokenized over $1.5bn in assets across real estate, private credit, funds, litigation finance and more.

We’re building a high-performance, people-first culture where ambitious individuals can thrive. We move fast, think big and hold ourselves to a high bar, while keeping things collaborative, open and genuinely fun. At Ctrl Alt ideas win on merit, teams work closely with leadership, and everyone has a voice in shaping what we build next.

We believe that hard work should come with real reward. You won’t just join a company - you’ll help build one. Last year alone, we grew from 17 to 50 people, and this year we’re going faster and further. That means real responsibility, meaningful impact, and the opportunity to grow alongside a company that’s redefining the future of finance through the tokenization of alternative assets.

If you’re excited by scale-up energy, ownership, and the chance to help shape both a business and a culture, Ctrl Alt is where you can do the most rewarding work of your career.

AS SEEN IN

What's Involved

• 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 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

Requirements

Must Haves

• 5+ years experience as a Software Engineer
• Proficiency working with TypeScript/JavaScript backend frameworks (Express, NextJS 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

Nice to Haves

• Strong engineering principles
• Excellent communication skills - written and verbal
• Experience in React and React Native

Benefits

Join a scaling fintech building the next generation of investment banking. You’ll work at the intersection of capital markets and cutting-edge blockchain technology, helping drive and shape the future of financial infrastructure.

What it’s like working at Ctrl Alt

• Build and own the future of finance - Take real responsibility in shaping digital capital markets, with the autonomy to lead decisions and drive impact.
• Solve meaningful problems with exceptional people - Tackle complex challenges at the intersection of finance and technology alongside leaders with experience from Morgan Stanley, Credit Suisse, UBS, and Revolut.
• Grow fast in a high-performance environment - Stretch beyond your comfort zone through close collaboration, rapid feedback, and continuous learning.
• Innovate and make your mark - Bring bold ideas to life and influence our platform, products, and how we operate from day one.
• Grow at speed - Stretch beyond your comfort zone with increased responsibility, fast feedback, and an environment designed for continuous improvement.

How we support you

• Competitive salaries with regular reviews that reflect your impact, performance, and progression.
• Generous stock options so you directly share in the company’s growth and long-term success.
• Premium private healthcare to support your physical wellbeing.
• 26 days of annual leave, plus your birthday off, and regional bank holidays.
• An enhanced parental leave policy to support you and your family at every stage.
• A MacBook, screens, and any additional equipment you need to perform at a high level.
• Access to salary sacrifice schemes covering childcare, groceries, EV cars, tech, pensions, bikes, and subscriptions.
• Modern, centrally located offices in London, Belfast, Dundalk, and Dubai - designed for collaboration and focus.
• An annual learning and personal development budget for training, exams, certifications, and qualifications - whatever helps you move forward.