At a Glance
- Tasks: Design and implement scalable test automation frameworks for rapid feedback and continuous testing.
- Company: Join Biller Genie, a fast-growing B2B SaaS platform with ambitious plans in Belfast.
- Benefits: Enjoy private health insurance, generous holiday, and a matched pension scheme.
- Other info: Collaborative culture with opportunities for professional growth and development.
- Why this job: Shape the future of quality engineering in a dynamic fintech environment using AI tools.
- Qualifications: 5+ years in software testing, strong programming skills, and experience with test automation.
The predicted salary is between 63000 - 77000 £ per year.
Location: Belfast, Northern Ireland
Work Arrangement: Hybrid
Position Overview
We are seeking an experienced Senior Software Development Engineer in Test (SDET) to act as a catalyst for quality across our engineering organisation. You will be a first‑class engineer who builds & maintains our automated testing infrastructure, enabling rapid feedback cycles and the delivery of high‑quality software at speed. This is a technical leadership role: you will advocate for quality throughout the software development lifecycle, design test strategies, influence our test architecture, mentor others in test automation, and partner with engineering teams to build quality in from the ground up rather than test it at the end. We are an AI‑enabled engineering team, and we believe the future is about empowering engineers with the latest tools, building through custom skills, agents, and harnesses, and we are looking for people who embrace AI, are excited about the future, and want to shape the way we embed AI tooling throughout our developer experience. If you are passionate about quality engineering, comfortable using AI tooling to work faster and smarter, and want to shape testing practice in a fast‑paced fintech environment, we want you on our team.
About Us
Recently ranked #482 on the Inc. 5000 fastest growing companies in the United States, Biller Genie is an award‑winning B2B SaaS platform that is entering the Belfast market with ambitious plans to scale our team rapidly, with over 100 hires planned through 2028.
Primary Job Responsibilities
- Test Architecture: Design and implement scalable test automation frameworks that enable rapid feedback and continuous testing
- Quality Engineering: Partner with development teams to build quality into the development process through test automation, code reviews, and best practices
- Innovation: Research and implement new testing tools and methodologies, including AI and agentic engineering approaches, to improve our testing efficiency and coverage
- Continuous Improvement: Lead initiatives to enhance our testing infrastructure, practices and metrics to drive quality improvements
- Technical Leadership: Mentor team members in test automation best practices and quality engineering principles
- Perform other duties required by Management
Essential Criteria
- BSc or MSc in Computer Science, Software Engineering or related field OR equivalent commercial experience
- Minimum 5 years of software testing experience in SaaS environments
- Strong proficiency in at least one object‑oriented programming language, ideally C#, though strong OO fundamentals in Java, Python or a similar language are equally welcome
- Extensive hands‑on experience with test automation frameworks and tools (e.g. NUnit, xUnit, Moq, SpecFlow/Reqnroll, or the equivalents in your language of choice)
- Experience with API testing tools and techniques (e.g. Postman, RestSharp)
- Experience with UI/browser automation (e.g. Playwright, Selenium)
- Practical experience working with AI and agentic engineering processes
- Working knowledge of SQL and database testing
- Familiarity with CI/CD pipelines and tools
- Experience of cloud technologies such as Azure, AWS, GCP
- Proficient with Git and related workflows
- Strong attention to detail and work ethic
- Strong analytical and problem-solving skills
- Excellent communication (both written and verbal) and interpersonal skills
- Ability to work effectively with cross‑functional teams
- Legal right to work in the UK
Desirable Criteria
- Proficient with Claude or Claude Code
- Experience with performance testing frameworks and tools (e.g. k6, JMeter, NBomber)
- Knowledge of security testing principles and tools
- Experience with test data generation and management
- Experience of LEAN software development practices
- Experience with Azure Functions and Queues
- ISTQB Advanced Level or relevant technical certifications
- Experience in the Financial services industry
- Experience mentoring engineers or leading a test/QA function
What We Offer
- Private health insurance
- Group life death benefit
- Auto‑enrollment pension with employer contributions matched to 5%
- 25 days holiday per year
- 10 statutory/bank holidays per year
- Opportunities for professional growth and development
- A collaborative and innovative work environment
Our Mission
To provide an automated A/R platform that seamlessly integrates existing business processes for the SMB market.
Our Core Values
- Get Shit Done Right: We work hard and ensure tasks are completed correctly and on time, every time.
- Own it: We are subject matter experts who know what we know, and we are confident enough to speak up when we see something wrong.
- Catch Up: We are high performers and love a fast‑paced environment.
- Believe in the Genie: We are passionate about where we are going as a team, and we show we care.
- Class Shines: We are articulate professionals who carry ourselves well and speak with purpose.
Please note we are unable to offer visa sponsorship.
Senior Software Development Engineer in Test employer: Biller Genie
Biller Genie is an exceptional employer, offering a dynamic and innovative work environment in Belfast, where experienced Full Stack .NET Engineers can thrive. With a strong focus on professional growth, employees benefit from private health insurance, generous holiday allowances, and a collaborative culture that embraces AI-driven development. Join us to make a meaningful impact in the fintech space while being part of a rapidly growing team that values expertise and creativity.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Development Engineer in Test
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Biller Genie or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Biller Genie.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Biller Genie.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Biller Genie that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Software Development Engineer in Test
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Biller Genie.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Biller Genie and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Biller Genie
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Biller Genie uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
