Lead Backend Engineer

Sumup

SENIOR BACKEND ENGINEER — GLOBAL EXPANSION ABOUT THE TEAM The Global Expansion Acquiring Squad is the engine behind SumUp's growth into new markets — integrating local payment acquirers, enabling merchant onboarding, and ensuring transactions flow reliably across countries like Mexico, Canada, New Zealand, and Australia. This role sits at the heart of that mission, owning critical backend systems while also shaping how the squad works — building AI agents and developer tooling that make the entire team faster and smarter. If you're a backend engineer who wants real ownership, enjoys working in ambiguous and complex environments, and is genuinely excited about teaching AI how your codebase works (not just using it for autocomplete), this role is for you. WHAT YOU'LL DO * Design and build scalable backend services in Golang and Kotlin, covering merchant onboarding, transaction processing, and reconciliation across multiple acquirers and markets * Lead technical investigations for new market launches and mentor engineers on the team * Configure and maintain AI coding assistants (Cursor, Copilot, Continue) with team-specific rules, framework conventions, and testing patterns — so generated code fits our systems, not generic templates * Build AI agents that automate repetitive development tasks, such as generating integration stubs, updating OpenAPI specs, and flagging idempotency violations * Keep documentation accurate and AI-accessible, so the team spends less time answering "how does X work?" and more time shipping YOU'LL BE GREAT FOR THIS ROLE IF… * Strong proficiency in Golang (primary) or a JVM language such as Java or Kotlin, with experience building distributed, fault-tolerant backend systems * Experience configuring AI coding assistants at a team level — defining rules, prompts, and context packages that produce consistent, framework-compliant output * Solid understanding of idempotency, retry policies, and transaction safety in payment or financial systems * Comfort working across multiple teams and domains simultaneously, navigating ambiguity and influencing without direct authority * A track record of taking ownership in complex, cross-functional environments where the scope isn't always clearly defined 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 €2,000 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.

ICE

ABOUT ICE SERVICES ICE Services is a music technology company built by rightsholders, for rightsholders. We simplify the complexities of the music royalty chain through an innovative suite of licensing, processing, and copyright services, enabling our customers to accurately and efficiently compensate songwriters and composers for the use of their works.  A joint venture between PRS, STIM, and GEMA, ICE Services is the result of a big vision for the industry that harnesses years of combined experience in the multi-territory music market. Serving over 330,000 rightsholders and leveraging a copyright database comprising 55 million musical works, ICE Services’ operations touch 250+ territories to distribute more than €1bn in royalties per year, with a total of over €5bn distributed to date.   We’re based in the UK, Germany, and Sweden.     ABOUT THE ROLE As a Senior Backend Engineer, you will play a pivotal role in the development and enhancement of our new copyright product. Your responsibilities will include hands-on product engineering, working with a team of talented product engineers, designing and implementing complex systems, and collaborating with cross-functional teams to deliver exceptional products to our customers. If you thrive in a collaborative environment and possess a keen eye for detail, this is an excellent opportunity to contribute to groundbreaking projects and shape the future of the ICE Services' product portfolio. We’re building a strong foundation for our company on these products. Bringing the technical expertise in-house and being part of a modern, product-centric technology organisation that works based on agile methodologies and principles are key pillars of our technology strategy. We’re creating the kind of teams talked about in Inspired by Marty Cagan, and following principles in Accelerate by Nicole Forsgren. TECHNOLOGY STACK Our copyright product is primarily running in AWS with the following technologies: • Java SpringBoot Microservices • DynamoDB • OpenSearch • Postgres • S3 • Kinesis • SNS • SQS • Docker / ECS / EKS • Serverless frameworks   KEY RESPONSIBILITIES: * Architect and Implement: Work as part of a product engineering team to design and implement complex software systems, ensuring scalability, reliability, and performance. * Collaboration: Collaborate with product managers and cross-functional teams to define product requirements and create comprehensive technical specifications. * Code Reviews: Conduct thorough code reviews, providing constructive feedback to maintain code quality and adherence to best practices. * Technical Ownership: Take ownership of critical technical decisions and provide expert guidance in selecting appropriate technologies and tools. * Development Practices: Champion best development practices, includ- ing code documentation, unit testing, and version control. * Risk Mitigation: Identify and mitigate technical risks, proactively ad- dressing potential challenges throughout the product development lifecycle. * Industry Trends: Stay up-to-date with the latest industry trends and advancements, integrating new technologies to enhance product offerings and maintain a competitive edge. * AI-Assisted Engineering: Embrace AI-powered tools (e.g., coding assistants, automated testing, intelligent search) as productivity multipliers, and explore opportunities where AI can enhance our copyright products. * Mentoring: Mentor and coach junior engineers, fostering a culture of continuous learning and professional growth.   REQUIREMENTS AND QUALIFICATIONS: * Experience: 5 to 7 years of relevant experience in product engineering. Previous experience in a senior or lead engineering role is highly preferred. * Technical Expertise: Demonstrated expertise in programming languages such as Java alongside proficiencies in web technologies, database management, and cloud platforms. * Proven Track Record: A history of designing, developing, and delivering successful software products from concept to launch. * Collaboration Skills: Ability to work collaboratively with product managers, designers, and other stakeholders to translate product requirements into technical solutions. * Communication Skills: Clear and effective communication skills, both written and verbal, to convey technical concepts to technical and non-technical audiences alike. * Innovation: A passion for innovation, including openness to leveraging AI-powered tools and technologies in daily engineering work. Commitment to staying abreast of emerging technologies and industry trends. * Quality Focus: A strong commitment to code quality, unit testing, and other best practices in software engineering. * Adaptability: The ability to thrive in a fast-paced and rapidly evolving environment, with a willingness to take on new challenges and responsibilities. * Problem-Solving: Excellent analytical and problem-solving skills to resolve complex technical challenges.   WHAT WE OFFER: * Competitive local benefits based on your location * We promote flexible working regarding time and/or place * Both mental and physical health initiatives * Corporate pension scheme  * Comprehensive training and development opportunities  * Industry insider events, team socials and company events * Enhanced holiday allowance  We welcome candidates from all backgrounds, regardless of age, disability, gender, gender identity, gender expression, race, religion or belief, sexual orientation, socioeconomic background, and any other protected characteristic.  We are committed to making all stages of our recruitment process accessible to candidates with disabilities. Please speak to our recruitment team and we will work with you to make reasonable adjustments to ensure you can perform at your best throughout your application.

Parloa

ABOUT PARLOA Parloa’s mission is to make every customer conversation feel effortless for both customers and the companies serving them. As agentic AI accelerates, Parloans are shaping the foundation of a new era in customer experience, one where customer support is no longer transactions, but meaningful exchanges. It is not just a vision; Parloa has powered over ONE BILLION interactions between global enterprise brands and their customers, with companies like Booking.com, HealthEquity, Allianz, SAP, BarmeniaGothaer, and TUI already deploying Parloa at scale. ABOUT THE ROLE: As a Senior Backend Engineer, you will work on a marketplace of tools and integrations which Parloa's agents leverage via MCP. Managed access to business systems dramatically increases their value while controlling for security and risk. You haven't worked with our stack? That's fine! We would love to get in touch as long as you are open to learn and code in Typescript.   AREAS OF OWNERSHIP: * Design, build, and maintain secure and scalable backend services * Optimize system performance for low latency, high throughput, and reliability * Collaborate across teams to integrate machine learning components into production systems * Lead technical initiatives - design, planning, implementation, and maintenance (3-9 months horizon) * Drive initiatives to improve operational excellence * Contribute to the evolution of our architecture and engineering culture * Set cultural standards for fearless iteration, bias for action, and pragmatic perfectionism—design for tomorrow, build for today. OUR TECH STACK: TypeScript, Node.js, React, Python, FastAPI, Kubernetes, MongoDB, Azure, Kafka, NATS  WHO YOU ARE: * 7+ years of experience as a software engineer * Experience in Typescript, Node (ideally NestJS); or experience with comparable frameworks in other languages, and a willingness to learn and code in Typescript * Experience with developing and maintaining highly scalable and reliable microservices * Deep understanding of distributed systems, event-driven architectures, and APIs * Experience with cloud-native infrastructure (e.g., Kubernetes, GCP/AWS) * A bias for action, strong ownership, and a passion for clean, pragmatic code * Experience in leading technical projects  (3-9 months horizon) * Strong spoken and written communication skills in English * Curiosity and openness to work with AI-assisted coding tools * Thrives in ambiguous, high-stakes environments with a strong sense of urgency. * Embodies Parloa’s ambition: to build Europe’s leading engineering culture and a world-class AI platform. * Motivated by making the impossible possible and building something iconic.   OUR ENGINEERING VALUES: At Parloa, we hire, promote, and evaluate based on cultural and technical excellence. You’ll thrive here if you: * Earn Trust – act with transparency and reliability. * Obsess Over Customers – always start with the customer problem. * Think Big – set bold goals and pursue them fearlessly. * Have Integrity – do the right thing, especially when it’s hard. * Disagree & Commit – debate with candor, align fast, and deliver. * Own It – take full responsibility for outcomes, not just tasks. * Dive Deep – master the details without losing sight of the big picture. * Bias for Action – move fast, decide quickly, iterate fearlessly. * Deliver Value – measure success by customer and business impact. * Insist on the Highest Standards – raise the bar continuously. * Go the Extra Mile – make the impossible possible. * Hire & Elevate the Best – raise the bar with every hire   OUR RECRUITING PROCESS:   Recruiter Call → Technical Peer Interview → 360° Tech Interview Loop → Bar Raiser   WHY PARLOA?   We’re at the beginning of a new era in customer experience, one where AI doesn’t just respond, but understands, reasons, and takes action. We’re building agentic AI that enterprises trust with their most important customer moments: complex questions, high volumes, real stakes. When millions of people reach out to a brand, those interactions aren’t just support tickets; they’re defining experiences. We’re here to raise the standard: making every conversation seamless, intelligent, and genuinely helpful. If you care about shaping how businesses and customers connect at scale—and want your work to matter in real, everyday moments—this is where you do it. At Parloa, ownership isn’t a buzzword; it means being accountable for outcomes, not just tasks. We operate in a category that’s evolving fast, where the bar is high, and the problems are complex. We hire people who think in solutions, communicate with clarity, and follow through. People who are comfortable making decisions, taking responsibility, and raising the standard for themselves and those around them. We’ve grown beyond the earliest startup phase, but we’ve kept the intensity: fast execution, direct feedback, and a strong expectation to contribute meaningfully from day one. Backed by leading global investors like General Catalyst, EQT Ventures, and Altimeter Capital, we’re scaling with a clear ambition: to become the global category leader in enterprise-grade conversational AI.     ---------------------------------------------------------------------------------------------------------------------------------- Parloa is committed to upholding the highest data protection standards for our clients' and employees' data. All our employees are instrumental in ensuring the utmost care, GDPR, and ISO compliance, including ISO 27001, in handling sensitive information. Parloa is an e-verify employer in the USA. Please click here to learn more. * We provide equal opportunities to all qualified applicants regardless race, gender, sexual orientation, age, religion, national origin, disability status, socioeconomic background and other characteristics.