Senior Software Engineer - Back-End

👋 About UsAt sunday, we’re transforming the dining experience with fast, seamless payments. No more waiting for the bill — with one scan, guests pay, tip, and leave. We're creating a world where time is better spent enjoying the moment. We’re a growing team of bold thinkers, builders, and creators, working across Europe and North America to bring better hospitality to life.💼 About The RoleWe’re looking for a Senior Back-End Engineer to help elevate how we build guest-facing products at sunday. This isn’t just about writing great code — it’s about shaping how the back-end is done across the company. You’ll play a critical role in structuring projects, setting engineering standards, mentoring teammates, and driving architectural clarity. If you care about quality, collaboration, and creating systems that scale, we want to hear from you.🔥 Key ResponsibilitiesDrive the unification and evolution of features across our apps to deliver a cohesive and high-quality user experienceLead architectural decisions and long-term thinking around scalability, performance, and maintainabilityShare your thinking in architecture forums and document decisions through Architecture Decision Records (ADRs)Raise the bar on code quality through testing, documentation, and shared toolingPartner closely, product, and design teams to deliver value through fast, focused iterations😊 About YouYou are laser-focused on impact. You don’t just ship code — you ship results. You thrive in fast-paced, moving environments. You’re driven by outcomes, not output, and you know that progress is better than perfection.You take end-to-end ownership — from shaping the problem with product and business teams, to delivering clean solutions, to making sure everything runs smoothly in production. You care just as much about the “why” as the “how”, and you’re comfortable stepping into early-stage product conversations, customer feedback loops.You’re relentlessly execution-oriented, adaptable, and always focused on delivering value.As a senior engineer, you understand that your impact goes beyond your own code. You actively mentor others, foster good engineering practices, and lead by example. You influence across teams, elevate the technical bar, and help align teams on architectural You have a strong proficiency in Java, Kotlin, Spring and scalable back-end architecture patternsYou're fluent in testing approaches, performance optimization, and modern toolingYou are able to translate business and product goals into maintainable technical solutionsYou are a clear communicator, both written and verbal — especially in asynchronous contextsYou're able to design and challenge API contracts for clarity, completeness, and long-term evolutionYou offer mentoring and share good design practices with your colleagues🖥️ Technical EdgeYou don’t need to be an expert in everything, but the more of these boxes you tick, the better:Awareness of security concerns and how to address them proactivelyFamiliarity with Kotlin and Mobile (preferred)Experience building resilient interfaces on top of distributed systems (graceful degradation, loading states, error handling)Familiarity with observability (logs, traces, metrics) and performance monitoring toolsBasic understanding of edge deployments🌟 Why this role matterssunday is growing fast — and with that comes complexity. We’re scaling across products, markets, and teams. This role is about helping us bring clarity to that complexity. You’ll play a key part in shaping the way we build and scale at sunday, making sure our experiences are fast, delightful, and resilient — no matter how big we get.⛳️ Compensation, Perks & BenefitsCompetitive salary and equityRemote-first friendly culture with flexible working hoursThe chance to build products used by millions across the globe100% health coverage for you and your childrenFree vacation policyOpportunity for significant impact in shaping innovative product development within a high-growth environmentThank you for taking the time to apply, and looking forward to getting to know you!sunday is an equal opportunity employer and does not discriminate and all qualified applicants will receive consideration for employment without regard to race, creed, color, sex, affectional or sexual orientation, gender identity or expression, gender, ethnicity, religion, national origin, ancestry, nationality, age, disability, marital status, veteran status, genetic information, or on any other basis prohibited by law (except where an attribute is a bona fide occupational qualification).