Backend Engineer, Core Tech, Canada

Sumup

SumUp builds simple, affordable financial tools that help over 4 million small businesses across 37 markets get paid, manage their money, and grow. Beyond card payments, we offer a full suite of financial products - business banking, lending, invoicing, and money transfers - giving merchants everything they need in one place.  Our Transfers Excellence squad sits within SumUp's Global Bank, and owns the core services that power how merchants and consumers move money. E.g. IBAN-based transfers, money in and out, and peer-to-peer payments via the SumUp consumer app. With the high volume transfers per hour across our European markets. That means reliability isn't a nice-to-have - it's the baseline for us. Right now, the team is replacing a set of market-specific implementations with a single, unified global transfer platform that will serve Europe, the UK, Brazil, Chile, and eventually the US and Canada.  Join our team and contribute directly to platform-level architecture that will shape how SumUp moves money at scale - work that directly impacts millions of small businesses every day. Our tech stack includes Kotlin, Java, Go, a bit of Elixir, AWS, Kafka, PostgreSQL, and Kubernetes, supported by a strong observability toolchain with Prometheus, Grafana, and Honeycomb. We also actively use AI‑assisted development tools such as Cursor, GitHub Copilot, and others. 🎥 Get a feel for life in our Berlin office. WHAT YOU'LL DO * Build and maintain backend services that sit at the heart of SumUp's transfer infrastructure, taking end-to-end ownership from development through to observability, testing and production support * Contribute to the migration from market-specific services toward a unified global transfer platform, working across a mix of active services and legacy systems being decomposed * Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team * Participate in incident reviews and the on-call rotation, taking accountability for the reliability of the services you build * Contribute to the technical roadmap by participating in architectural discussions and proposing solutions for complex, distributed systems challenges * Apply AI tooling to accelerate your own engineering workflows and contribute to raising the team's overall AI literacy YOU'LL BE GREAT FOR THIS ROLE IF… * Solid experience as a Backend Software Engineer in modern languages (e.g. Kotlin, Go, Java, etc.). Kotlin is the team's primary language and we also work with Java, Golang, and Elixir. * Solid understanding of distributed systems and event-driven architecture. Experience with async processing and messaging tools like Kafka (or similar). * Experience working with microservice architectures, including Spring Boot and event-driven patterns, alongside solid knowledge of relational databases and API design * Comfortable working in high-throughput, regulated environments where reliability matters. Defensive coding and attention to edge cases are part of the job * Clear communicator in written and spoken English, with a collaborative approach to working across global teams  * Curious about the product impact, not just the code. Comfortable thinking about how backend decisions affect the end user experience.  WHY YOU SHOULD JOIN SUMUP * 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup * 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced * 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success  * 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education * 💶 A corporate pension scheme where we match up to 20% of your contributions  * 🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days * 🏙 Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches * 🌴 Break4me: 1-month sabbatical after 3 years of service * 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team ABOUT SUMUP Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website, and follow our journey on LinkedIn, Instagram, and TikTok. Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

Etraveli Group AB

Etraveli Group is a leading global flight technology provider, specializing in flight sales and offering flight content delivery and fintech products. We are here to solve complexity, by connecting millions of flights and travelers across the globe, from search and selection to trip and beyond. We partner with major global platforms such as Booking.com, Google Flights, Skyscanner, and Kayak, providing seamless flight booking and related services. Our B2B portfolio includes a separate fintech entity with its flagship product, PRECISION, a risk management solution, Sweden’s leading flight comparison site Flygresor.se, Tripstack, our B2B Flights as a Service Provider and world leader in virtual interlining, and Wenrix, the embedded AI platform for flights. We also operate our own online travel agency brands including Gotogate, Mytrip, and Flightnetwork. Every day we strive to make the world smaller for our customers and bigger for our people. Our diverse team of more than 3200 passionate professionals is what makes us the industry’s tech wonder and the best in the world at what we do. Major offices in Sweden (HQ), Greece, India, Canada, Israel, Poland, UK, and Uruguay. The Role Etraveli Group is scaling agentic AI across software engineering, finance, sales analytics and beyond. To support this we are looking for an AI Solutions Engineer to serve as a primary technical point-of-contact for our AI initiatives. Together with AI Business Analysis that will identify what we should build, you are responsible for the How. You will both support prototyping and transforming concepts into robust, scalable and production-ready AI systems. Hence, you will bridge the gap between rapid PoCs and core engineering, ensuring all components are reliable, secure and deeply integrated into our tech ecosystem. You will also work closely with Data and Machine Learning Engineers, Product Managers, and business stakeholders across the organisation. This is not a purely technical role. The right person can understand the underlying business needs and answer questions on feasibility and delivering value by selecting the latest AI technologies, agentic frameworks and orchestration patterns that don’t just conceptually look good, but actually solve high-stakes complexities within Etraveli. The role can be based in Gothenburg or Athens. Duties and Responsibilities Architectural Design & Scoping Study project feasibility by evaluating if the available data will suffice for the intended AI solution Perform and communicate Cost-Benefit Analyses and identify factors which are crucial to the success of a given initiative Plan integrations and design how AI solutions will communicate to existing systems Select tools and decide whether to use LLM APIs (Claude, OpenAI, Gemini), agentic frameworks, integration tooling or a more custom-build solution Prototype Development Build functional versions of AI workflows to show stakeholders how they will work in the real world Facilitate integrations between LLMs and our internal data sources, APIs and other travel platforms Customise general AI products for specific in-house use cases Productionising AI workflows Wrap AI solutions in robust APIs and deploy them into our in-house cloud so other teams can use them Own the technical architecture for AI implementations, ensuring they are scalable, maintainable, and cost-effective Collaborate with DevOps and Security teams to ensure AI solutions meet enterprise-grade privacy and compliance standards Observe deployed LLM based solution, tracking usage and costs together with more technical metrics such as drift or latency Technical Consulting & Advocacy Stay on top of latest LLM and agentic AI developments and bring relevant capabilities to the attention of the team Lead technical evaluations of new frameworks with regard to their potential of enabling new initiatives Act as the technical subject matter expert for AI within the tech organization supporting the organisation's transition to working with LLMs and agentic AI tools – helping teams move from curiosity to confident, productive use Requirements 3–5 years with a solid foundation as a Machine Learning Engineer or Backend Engineer focused on ML systems Understanding of core architectural components in modern AI systems Proficiency in Python with the ability to build scalable high performance services and integrated complex ML and AI logic into production environments Proven experience in deploying open source LLMs on on-prem infrastructure or building using external LLMs Strong understanding of RAG, vector databases and the infrastructure required to support data-heavy AI applications Exposure to concepts like CI/CD and Orchestration and a basic understanding about service monitoring and alarms as well as secrets management Benefits Our office is located in Merkurhuset in Gothenburg, a few steps away from public transport and lunch restaurants. We work on a hybrid-model where you can choose to work two days from home and you have two weeks per year that you can choose to work from a remote location We love gaming and after work activities. We know the value of personal development and continuous training. Hackathons and Dev Weeks - We believe in promoting creativity and trying new things. Healthcare allowance – Each employee receives a maximum allowable amount each year according to the Swedish Tax Agency to spend on health-promoting activities such as a gym card, massage etc. Pension and health insurance – Through partners we offer a comprehensive pension and health insurance so that you can get help quickly in case of an accident. Daily breakfast – To kick the day off just right, breakfast is available at the office every morning. As part of this recruitment process, we will be conducting background checks. You will be able to read more information and give your consent to this process in the application form. Diversity disclaimer At Etraveli Group we value diversity; we pride ourselves on being a company represented by people of all different backgrounds. During hiring, we are committed to ensure equality and promote diversity in the workplace at every selection stage. As such, we provide the same opportunities for all candidates regardless of race, religion or belief, gender, nationality, ethnicity, sexual orientation, age, marital status, disability, or any other characteristic protected under any anti-discrimination law or regulation.

Stegra Boden AB

Studies show that women and underrepresented groups often hesitate to apply unless they meet every requirement. At Stegra, we’re building an impact-driven, sustainable company - and we need a diverse, inclusive team to make it happen. If you share our passion but don’t meet every qualification, we encourage you to apply anyway. You might be the perfect fit for this role, or another as we grow. At Stegra, we’re not just building a plant, we’re proving that sustainable industry is possible. And to do that, we need people like you. Join a team where safety comes first. Where we support each other, learn as we go, and make space for everyone to grow and contribute. This is your chance to be part of something big - while being closer to nature and leading a balanced, purposeful life. Backend Engineer – Digital Enterprise (HR & Finance) At Stegra, we are building a next-generation steel plant - and digital capabilities are a core part of how we operate, optimize, and scale our operations. We believe the best digital solutions are created close to the business, by teams who understand both the context and the technology. Our teams work cross-functionally to build solutions that are scalable, maintainable, and create real value. We are now looking for a Backend Engineer to join our Digital Domain supporting HR and Finance. What you’ll do In this role, you will be part of a cross-functional team within our Digital Enterprise function, working closely with both business and technical colleagues. Your day-to-day work will include: Developing and maintain backend services that enable reliable HR and Finance operations Designing APIs and integrations that enable reliable and scalable communication between systems Working with both synchronous and asynchronous patterns, including event-driven approaches where relevant Contributing to how services are structured, interact, and evolve over time Collaborating with HR and Finance stakeholders to understand needs and turn them into working solutions Breaking down problems into clear technical components and development tasks Ensuring that security, data protection, and access control are embedded in the solutions we build How we work Modular, microservice-based architecture Combination of well-designed APIs and event-driven integrations Integration treated as a core capability Systems designed to evolve and be replaceable over time Iterative development - delivering early and improving continuously We make use of modern tools, including AI-assisted development, while placing strong emphasis on understanding problems, making sound technical decisions, and building solutions that work in practice. What you’ll bring A degree in Computer Science, Engineering, or equivalent experience A few years of experience in backend development Experience working with APIs and/or microservice-based systems Interest in how systems are designed and how components interact over time Familiarity with asynchronous patterns (events, messaging, queues) Ability to break down complex problems into structured technical solutions Comfortable working directly with both technical and non-technical stakeholders Interest in understanding business processes and how digital solutions support them Meriting: Experience with Kotlin / Spring or similar Experience with cloud, DevOps practices, or CI/CD Experience working with testing, monitoring, or production systems How you will grow We believe the best engineers don’t work in silos. While your core will be backend, you’ll have the opportunity to understand and contribute across the full stack - from data to frontend - and to take increasing responsibility for how services are designed, interact, and evolve over time, supported by experienced colleagues in each area. Benefits at Stegra At Stegra, you’ll join a company where your work has real impact on the climate, the industry, and future generations. We’re building a culture rooted in safety, trust, and inclusion, where people feel supported to grow and thrive. You’ll receive fair, competitive compensation aligned with collective agreements, along with benefits like up to 30 days of paid vacation, occupational pension, parental benefits, and insurance. If you need support with relocation or immigration, our relocation department will help guide you through the process, whether it’s permits, housing or other practical matters. You can also enjoy perks like subsidized gym memberships and bike leases, plus the everyday benefits of life closer to nature. This is Stegra Stegra is on a mission to change the global steel industry by producing green hydrogen, iron, and steel - with the goal of eliminating CO₂ emissions. Instead of coal, we use green hydrogen and fossil-free electricity, meaning our primary emissions will be water and heat. By 2030, our ambition is to produce 5 million tonnes of green steel annually in our fully integrated, digitized, and sustainable plant in Boden, Northern Sweden - currently under construction. But this is just the beginning. Our expertise in green hydrogen will enable us to decarbonize industries beyond steel, paving the way for a cleaner future. Our Stockholm Office Our modern Stockholm office is located on Norra Stationsgatan, close to Karolinska University Hospital in central Stockholm. Here, you’ll find a bright, collaborative workspace where cross-functional teams connect, share ideas, and drive progress. Whether you're visiting regularly or working hybrid, you'll be part of a vibrant office culture with easy access to the city’s energy and amenities.