Software Engineer

3dpersonnels; Derry and Strabane District; On-site; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Hybrid work pattern

Free food and drinks

Gym membership

Bike-to-work

Flexible hours

Bonus on targets

Job summary

3dpersonnels in Derry is seeking a Software Engineer to join our AI-first engineering culture. You will build features end-to-end using AI agents, contribute to reviews, and own components with minimal supervision.

You should be comfortable in a small startup environment, demonstrate strong technical fundamentals across frontend, backend, and databases, and be curious about AI tooling. Hybrid pattern with three in-office days per week.

Qualifications

• Strong technical fundamentals across frontend, backend API design, and databases.
• Ability to work independently with defined outcomes.
• Calm under pressure and demonstrated integrity.
• Clear growth trajectory and openness to feedback.
• Experience in a small startup environment.
• Curiosity about AI-assisted engineering.

Responsibilities

• Ship features end-to-end using AI agents, from design through to production.
• Take ownership of components and projects with minimal direction.
• Contribute to code reviews and architectural discussions.
• Maintain and improve engineering practices around testing, observability, and CI/CD.
• Grow into more senior responsibilities as the team expands.

Skills

Independent worker

AI-curious

Growth mindset

Startup experience

Problem solving

Tools

TypeScript

AWS Lambda

Postgres

Angular

Job description

Software Engineer required for Derry. 3 days PW in Office - Hybrid and Condensed.

About Our Client

Our client is a fast-growing technology company based in Derry, delivering mission-critical, ISO 27001-certified software for UK Election campaigns. Having successfully delivered against multiple UK election cycles, they are now entering a significant growth phase, with their client base forecast to expand substantially over the next 12-18 months. This is a genuinely AI-first engineering culture - not as a buzzword, but as the operating standard. The team builds using AI agents day-to-day, and this hire will be central to embedding that practice across the function as the business scales. It is a rare opportunity to join a small, high-trust team building regulated, high-stakes software, with real autonomy and a direct line to the CEO.

They require a Software Engineer to join our engineering team. Following the successful delivery of the UK General Election and Local elections, our client base is forecast to grow significantly over the next twelve to eighteen months, and we need solid engineers who can ship code, work independently, and grow with us. You will build software using AI agents, contribute to code reviews, and take ownership of features end-to-end. AI-first engineering is how we aspire to work. You do not need to be fluent with AI tooling already; but you will be expected to dive into AI‑first workflows and figure it out. The role reports to the Head of Engineering. You will work closely with our operations and sales colleagues to understand what we are building and why.

What you will do

• Ship features end-to-end using AI agents, from design through to production.
• Take ownership of components and projects without needing constant direction.
• Contribute to code reviews and architectural discussions.
• Maintain and improve the engineering practices around you: testing, observability, CI/CD.
• Grow into more senior responsibilities as you develop and the team expands.

What we need from you

• Strong technical fundamentals. Comfortable across front-end, back-end API design, and database work. Can understand and create production quality experiences with technical and customer minded care.
• Ability to work independently. You can pick up a piece of work, remove ambiguity, define what done looks like, and deliver it without close supervision.
• Composure and integrity. Direct, willing to admit mistakes, calm under pressure.
• Visible growth across your recent roles. Open to feedback and ready to push yourself.
• Comfortable working in a small startup environment.
• Drive towards AI-assisted engineering. We do not expect you to be fluent already, but we do expect you to be curious about it and quick to pick up new tooling. We are still embedding AI into our practices and need people that will help with that.

Not essential but helpful

• Experience with TypeScript, AWS-native serverless (Lambda), Postgres or Angular.
• Experience with regulated, mission-critical software.
• Experience working in a small team with broad responsibility.

Our stack

• TypeScript across the stack.
• AWS-native serverless architecture, primarily Lambda.
• Relational and document-based data stores.
• Modern frontend.
• CI/CD pipelines on AWS, infrastructure as code via AWS CDK.
• ISO 27001 certified; you will be working with sensitive election data and should expect to operate to high security and compliance standards.

What's On Offer

• Market-competitive salary with a defined bonus on agreed targets
• Hybrid working pattern - minimum 3 days per week in the Derry office.
• Free food and drinks from the onsite café
• Subsidised gym membership
• Bike-to-work scheme.
• Flexible and hybrid working, including condensed hours.

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Please note: Applications can only be accepted from candidates who already hold the legal right to work in N. Ireland.

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