Senior Backend Engineer - Java/Go

Senior Backend Engineer (Java/Go), Remote (Canada) At a Glance Senior Backend Engineer, two roles open, joining a fast-growing AI test automation scale-upJava and/or Go, cloud-native backend systems at real scaleFully remote, must be based in CanadaAround CAD $160,000, with flexibility for an exceptional candidateJoin a genuinely global engineering team and help shape how AI-powered testing gets built About the Company This business is an advanced, AI-native test automation platform, helping enterprises test faster, smarter and more reliably. Its AI test agents learn and adapt to changes in modern applications in real time, removing the fragility of traditional scripts and enabling intelligent automation across platforms such as Salesforce, Workday and complex custom apps. Backed by top-tier investors and trusted by global brands, the business is growing fast, and this is a genuine opportunity to join early and help define what comes next. The Role This is a rare chance to join a scale-up at the exact moment it is building momentum, working alongside a tight-knit engineering team spread across Northern Ireland, Brazil, Canada, Hungary and Romania. You will pair closely with another engineer on real projects, own backend architecture end to end, and see your decisions land directly in a product used by global enterprise customers. Engineers here use AI heavily in their day-to-day workflow, so you will be building with the same tools that are reshaping how software gets written, not reading about them after the fact. The team wants people who think deeply, communicate clearly and enjoy the pace and ownership that comes with a growing company. Key Responsibilities Design, develop and maintain scalable, high-performance backend systems using Java and/or GoOwn backend architecture and shape design decisions that improve reliability, maintainability and customer impactLead internal and customer-facing projects through to timely, high-quality deliveryIdentify and resolve performance bottlenecks, analysing system metrics to drive backend efficiency and resiliencePair closely with another engineer on shared projects, rotating across the codebase as business needs evolveContribute to collaborative architecture discussions across the wider engineering teamUse AI tools such as GitHub Copilot, Cursor or Codex to improve engineering workflow and productivityTake part in the support and on-call rotation, staying close to real customer issuesMentor other engineers and help raise the bar on engineering quality across the team What You'll Need Essential: Strong professional backend engineering experience, ideally 5+ years; open-minded on exact years, prioritising engineering quality and trajectory over a set numberHands-on experience in Java and/or Go, deep enough to explain architecture, trade-offs and the impact of your own decisionsPractical experience using AI tools as part of your day-to-day engineering workflowStrong communication skills and comfort discussing disagreements, trade-offs and stakeholder conversationsMust be based in Canada Desirable / Nice to Have: Experience with cloud platforms (GCP preferred) and containerised environmentsBackground working in a fast-moving scale-up or product-led environment Why Apply? Around CAD $160,000, with flexibility for an exceptional candidateFully remote within Canada, with genuine flexibility over how you workStandard benefits packageShare options, so you own a piece of the company you are helping to buildJoin a lean, global team of around 10 engineers across Northern Ireland, Brazil, Canada, Hungary and RomaniaReal ownership from day one, working on architecture and decisions that customers feel directlyBuild with AI as a core part of how the team works, not as an afterthoughtA genuine seat at the table in a company backed by top-tier investors and scaling fast