Senior Backend Engineer (Golang)

fiskaly develops technology that secures digital receipts and ensures legally compliant transactions for millions of users each day. By applying digital signatures, the company helps prevent tax fraud and supports merchants with a streamlined, paperless solution. The team is dedicated to simplifying receipts for everyone. Role overview This Senior Backend Engineer (Golang) position is a full-time, permanent role open to candidates based in or near Vienna, or within a two-hour time zone difference. The company is not considering freelancers for this role. What you will do Serve as a System Architect within a focused squad, developing API-first SaaS products. Lead backend development using Golang and other object-oriented languages, contributing throughout the software lifecycle. Apply modern tools, including AI coding assistants and automation, to minimize repetitive tasks and tackle complex problems. Design, build, and maintain distributed systems for fiskaly's fiscalization platform. Shape the architecture and scalability of the unified digital receipts interface. Requirements Minimum 5 years of backend development experience, with a strong background in Golang and object-oriented programming. Fluency in both German and English. Located in or near Vienna, or within a two-hour time zone difference. Available for full-time employment (no freelance contracts). Salary and contract Gross annual salary: €45,000 – €70,000 Full-time, permanent position

Join our Global Bank Tribe at SumUp, where we are revolutionizing the way merchants manage their banking needs. Our mission is to become the most trusted banking partner for small merchants worldwide, delivering a seamless, user-friendly, and affordable digital banking experience. As part of the Bank Activation and Revenue team, you will contribute to a high-impact growth initiative, aiming to empower merchants to maximize the benefits of their SumUp Business Account during their activation process. Our objective is to convert 100% of users from the SumUp ecosystem into active Bank Account holders. We oversee the essential journey from account creation to helping merchants understand how our business account can address their operational needs, making it a part of their everyday activities. To scale this initiative, we are developing a greenfield activation and engagement platform, which involves launching various initiatives and experiments to enhance the adoption and interaction of SumUp users with the business account. Your contributions will directly influence revenue by facilitating the seamless cross-selling of our comprehensive product suite to millions of merchants.

Join SumUp's Global Bank team, where we engineer the foundational infrastructure and services that empower merchants with digital banking solutions. We simplify financial management for small businesses, ensuring reliability and ease of use. As part of our Balance Management Squad, you will play a crucial role in modernizing and consolidating our balance management systems across Europe. We are embarking on an exciting journey to develop a global transaction history service, providing merchants with consistent and transparent insights into their financial activities. In your role as a Senior Backend Engineer, you will be instrumental in updating legacy systems, fostering innovation while ensuring stability, collaborating with cross-regional teams, and architecting dependable services that cater to diverse markets with unique regulations. If you are passionate about solving intricate problems in high-load environments, have a keen interest in banking, and seek a team that embraces challenges, we encourage you to apply!

Job OverviewPosition: Agentic Backend Engineer (Golang)Location: Ideally based in or near Vienna, or within a 2-hour time zone differenceLanguages Required: Fluent English; proficiency in any other European language is an advantageExperience: A minimum of 5 years in backend development with Golang and other OOP languages, contributing to a SaaS platform and overseeing the complete software lifecycleContract Type: Full-time only; freelancing is not an option

fiskaly is looking for a Staff Backend Engineer with strong Golang experience. This position focuses on designing, building, and maintaining scalable backend services that form the foundation of fiskaly’s products. Collaboration with colleagues from various teams is a key part of the role, with a shared goal of improving system performance and setting technical standards. Locations Berlin, Germany Madrid, Spain Milano, Italy Vienna, Austria What you will do Design, develop, and maintain backend services using Golang Work closely with teams across disciplines to deliver reliable solutions Drive improvements in system performance Help establish and promote technical quality and best practices within the backend team

Role overview Delivery Hero SE seeks a Senior Golang Engineer to help shape logistics systems and enhance the experience of delivery riders. The position centers on building and improving technology that supports daily operations and rider satisfaction across the business. What you will do Lead efforts to streamline delivery processes and upgrade workflow efficiency Design and build scalable backend solutions using Golang Collaborate with teams from different disciplines to deliver changes that make a measurable difference in operations Location This role is based in Berlin.

Join insiderone as a Software Engineer specializing in Golang in our vibrant Berlin office. As a crucial member of our development team, you will work on innovative projects that drive our technology forward. We seek passionate individuals eager to contribute to high-quality software solutions.

About the CompanyAndercore is an innovative AI-powered trading platform revolutionizing the industrial supply chain for infrastructure, energy, and construction materials. We connect thoroughly vetted suppliers from Asia, Europe, and the GCC region with local demand through a seamless integrated platform.Our proprietary AI technology digitizes and automates the entire lifecycle of materials trade—covering procurement, pricing, inventory management, logistics, and embedded financing—thus transforming countless manual processes into real-time, orchestrated workflows.Buyers enjoy instant quotes, dependable availability, and predictable delivery via our unified operating system. Suppliers benefit from precise forecasting, effective demand management, and smooth integration into cross-border fulfillment networks. We collaborate with leading brands to execute both dropship and cross-dock fulfillment strategies for large-scale transactions, turning global supply chains into predictable, repeatable, software-driven workflows.Having achieved triple-digit million GMV and operating in six international markets, we are swiftly moving towards profitability. With a diverse team of over 80 members based in Berlin and Asia, we are on a mission to build the world’s first industrial-grade AI operating system for materials—redefining the dynamics of global trade in one of the most critical industries.Backed by top-tier investors and global banking partners, we recently secured a $40 million Series B funding round led by Atomico, Project A, and Invent Capital, supported by institutional backing from Commerzbank and KfW.About the RoleAs a Senior Backend Engineer, you will serve as a technical pillar within our team, expected to lead by example, influence architectural decisions, and elevate the quality of our deliverables. You will work autonomously while remaining deeply embedded in a collaborative engineering culture.Tech Stack: Java 21 (Spring Boot 3), Python, LangGraph, LLM APIs (OpenAI, Anthropic, Gemini), PostgreSQL, Kinesis, AWS, Terraform, GitHub Actions, Node.js, TypeScript, Next.js, React.

Role overview Taktile supports banks and fintech companies by automating key decisions such as credit checks and risk assessments. The Senior Backend Engineer on Team Decide focuses on building and improving the distributed execution engine that drives customer workflows. This engine forms the foundation of Taktile’s automated decision-making platform. What you will do Design and implement backend systems for distributed workflow execution Take ownership of critical systems throughout their lifecycle, from architecture to deployment Collaborate with a small, dedicated team where each engineer’s perspective directly influences the product Address complex backend problems specific to automated decision-making in financial technology Location This role is based in Taktile’s Berlin office.

P-1327 At Databricks, we are driven by a passion for empowering data teams to tackle some of the world’s most complex challenges. From revolutionizing transportation methods to speeding up medical innovations, our mission is to build and operate the leading data and AI infrastructure platform, enabling our customers to leverage profound data insights to enhance their business. Established by engineers, Databricks is embarking on an ambitious journey to develop the most advanced Lakehouse Platform. While we have a solid foundation, we aim to elevate our offerings to create significantly improved products. Our goal is to reimagine every component to provide our customers with the fastest, most user-friendly, and secure data platform for all their data workloads. As a Senior Software Engineer, you will be a key member of our Berlin site and play a pivotal role in our multi-year mission to realize our Lakehouse vision. You will engage in the entire development lifecycle and embody the core values of Databricks. The impact you will have: Our backend teams operate across various domains within our essential service platforms. You may encounter challenges such as: Addressing issues that encompass product development and infrastructure, including distributed systems, scalable service architecture, monitoring, workflow orchestration, and enhancing developer experience. Creating reliable, secure, and high-performance services and client libraries for managing and accessing massive amounts of data on cloud storage solutions, such as AWS S3, GCS, and Azure Blob Store. Developing product features that empower our customers to efficiently store and access their data.

About GetYourGuideGetYourGuide stands as the world's leading marketplace for unforgettable travel experiences. Travelers utilize our platform to uncover the best activities in their chosen destination. Since our inception in 2009, over 150 million tours, activities, and attraction tickets have been booked through GetYourGuide by adventurers from around the globe. With a dedicated global team of more than 800 travel experts and technologists, we are proudly headquartered in Berlin, complemented by 17 local offices worldwide.The Mission:At GetYourGuide, technology is the driving force behind our growth. Our work within the Marketplace is transforming global travel experiences, and we invite you to join us in this endeavor.The features we develop facilitate seamless bookings for our customers while empowering our partners to expand their businesses. This complex task presents a remarkable opportunity to create extraordinary solutions that impact global travel. From building supplier infrastructures that enhance our partners' businesses to innovating marketplace features that propel our growth, you will have the chance to craft incredible solutions at GetYourGuide.Whether you're engaged in developing dynamic search algorithms or designing new features to accelerate our company's growth, your contributions will leave a lasting impact. Our teams consistently push boundaries, exploring innovative ways to bring the magic of travel to people around the world.We operate in cross-functional mission teams composed of backend and full-stack engineers, mobile engineers, data engineers, product managers, and designers.

Role overview Delivery Hero SE seeks a Senior Backend Engineer to join its AdTech team in Berlin. The focus is on developing and maintaining backend systems that power advertising technology products and services. What you will do Design and build scalable backend systems tailored for AdTech applications. Collaborate with engineers, product managers, and cross-functional teams to deliver features that enhance performance and user engagement. Create solutions that adapt to evolving customer and business requirements. Location This position is based in Berlin.

About the CompanyThe AI-powered trading platform revolutionizing industrial supply in infrastructure, energy, and construction materials. It seamlessly connects trusted suppliers across Asia, Europe, and the GCC region with local demand through a unified platform.Our proprietary AI technology digitizes and automates the entire lifecycle of materials trade—from procurement and pricing to inventory management, logistics, and integrated financing—eliminating thousands of manual, relationship-dependent processes with real-time orchestration.Buyers receive instant quotes, reliable availability, and predictable delivery through our cohesive operating system. Suppliers enjoy precise forecasting, disciplined demand management, and effortless integration into cross-border fulfillment networks. We partner with prominent brands to facilitate both dropship and cross-dock fulfillment for large-scale transactions, transforming global supply chains into predictable, repeatable, software-like workflows.Supported by top-tier investors and financing partners, we have achieved triple-digit-million GMV, operate across six international markets, and are rapidly moving towards profitability. With a growing team of over 80 individuals based in Berlin (our headquarters) and Asia, we are developing the world’s first industrial-grade AI operating system for materials—redefining the workings of global trade in one of the most substantial and vital industries.

Join our Global Bank tribe at SumUp, where we are revolutionizing the infrastructure for merchants by providing them with a digital business account that simplifies their banking needs. Our mission is to become the top banking partner for small merchants worldwide, delivering a seamless, straightforward, and cost-effective experience. As a valued member of our team, you will be instrumental in transitioning from a fragmented regional setup to a cohesive global infrastructure, thereby enabling millions of merchants to enjoy tailored banking solutions. In the role of Senior Backend Engineer on the Global Accounts team, you will take ownership of vital components of our bank account platform. You will be involved in the design and development of a fully distributed, event-driven system built for scalability, resilience, and compliance. Your primary development language will be Kotlin, with opportunities to work with Elixir and Golang. We embrace Extreme Programming methodologies: frequent iterations, daily releases, and a strong emphasis on technical excellence and deep problem-solving. Our tech stack includes Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes, complemented by observability tools such as Prometheus, Grafana, and Honeycomb. We also leverage AI-assisted development tools like Cursor and GitHub Copilot.

ABOUT TALON.ONE:Talon.One serves as a cutting-edge incentives engine that integrates loyalty programs, promotions, and gamification into a unified platform. With robust enterprise-grade security and scalability, Talon.One enables businesses to create customized, profitable promotions and loyalty initiatives leveraging any data.We proudly partner with over 250 globally recognized brands, including Adidas, Sephora, and Carlsberg, to enhance customer engagement and foster long-term loyalty.ABOUT THE TEAM:Our development team is composed of experts in frontend, backend, QA, product management, and visual design. We operate in small, cross-functional squads that provide insights into each team member's role, fostering collaboration and hands-on experience. Each squad is self-sufficient, autonomous, and accountable for specific features or areas within our platform. We prioritize collaboration, transparent communication, and mentorship to promote mutual growth. Talon.One is dedicated to creating an inclusive work environment, as we believe it positively impacts the entire tech industry.We are on the lookout for a Senior Backend Engineer to enhance our development teams. In this role, you will work closely with our product team to devise effective solutions for complex challenges while mentoring and supporting fellow team members.

Join our innovative team at redcare-pharmacy as a Senior Backend Engineer and play a pivotal role in developing cutting-edge backend solutions. You will work closely with cross-functional teams to design, implement, and maintain robust systems that enhance our pharmacy services.

Join our innovative team at dev2 as a Senior Backend Software Engineer, where you'll be instrumental in crafting robust and scalable software solutions. In this role, you will collaborate closely with cross-functional teams to design, develop, and deploy high-performance backend systems.

Your ResponsibilitiesTake ownership of the backend systems that facilitate thousands of hotel bookings every day.Architect, develop, and maintain our core booking infrastructure, ensuring robust integrations with PMS platforms, channel managers, and payment processors.Establish and uphold a resilient API layer that supports our React frontend operations.Elevate the engineering standards through effective system design, transparent communication, and strong technical leadership.Collaborate closely with the founders to influence the long-term architecture and foster a culture of engineering excellence.

Join us as a Senior Backend Software Engineer and become a vital member of one of our self-sufficient agile teams at Blacklane. Your expertise will contribute to the development of innovative services that power our platform, enhance our back-office systems, and resolve integration challenges faced by our business partners.Our technical ecosystem incorporates Ruby, Go, TypeScript, and Java services that are architected using Domain-Driven Design (DDD). These services run on our Kubernetes cluster and utilize domain events to communicate through SQS and Kafka. We leverage various data storage solutions including Postgres, MySQL, Elasticsearch, Redis, and DynamoDB, while predominantly utilizing AWS for our infrastructure and managing resources with Terraform.YOUR CHALLENGE:Address unique challenges to customize our offerings for diverse markets.Maintain high-quality standards through extensive testing, thorough documentation, code reviews, and collaborative knowledge sharing.Devote time to optimizing the performance, usability, and maintainability of the systems you oversee.Commit to ongoing personal development by acquiring new skills and technologies.Be an integral part of a motivated, open-minded, and collaborative team dedicated to enhancing travel experiences for our guests.ABOUT YOU:You are proactive, inquisitive, and thrive in a team-oriented environment.You possess a minimum of 5 years of experience in two or more programming languages.You have at least 5 years of experience with Ruby or Go.You are knowledgeable of the HTTP protocol and have experience developing or utilizing REST APIs.You write clean, maintainable code and are familiar with the complexities of distributed systems; you are comfortable working with existing codebases.You have experience with or an eagerness to learn about Event-Driven Architecture and Domain-Driven Design.You are experienced with Docker and containerized environments; familiarity with Kubernetes and Terraform is a plus.

About the RoleWe are on the lookout for two highly skilled backend engineers to join our dynamic team in Berlin. You will be instrumental in advancing the development and implementation of our technology, enhancing our capacity to create core backend functionalities, and empowering other teams to utilize this backend for their projects.If you have a passion for creating exceptional products, thrive in a fast-paced environment, and are eager to contribute to the success of an ambitious startup, this is the perfect opportunity for you.Our Tech Stack:Python / FastAPIPostgreSQL / MongoDB / ElasticCloud LLM providers + bare metal GPUsGCPAs an early team member, you will assume significant responsibilities from day one, with the chance to influence our technological architecture and infrastructure.Join one of the most ambitious AI companies today, collaborating with a world-class team of experts in their fields, and experience an incredibly stimulating work environment. In This Role You WillLead the delivery of complex projects, coordinating with cross-functional teams, and ensuring timely completion of essential components.Develop a deep understanding of Reliant's vision and integrate this into your architectural and process decisions in daily operations.Offer insights to refine UI/UX concepts and assist in the planning of backend and infrastructure development.Take proactive responsibility for long-term code quality and architecture. About YouThe ideal candidate will have a proven track record in backend or full-stack development, with a focus on rapid innovation and effective systems design that supports growth opportunities for both the product and the team.To thrive in this role, you should possess the following skills and experiences:5+ years of demonstrated experience in building backend services or distributed systems.Ability to design, develop, test, and maintain backend services and APIs that support product features, including writing robust, production-quality code.Engage in system and service design; contribute to architectural discussions and make informed trade-offs regarding scalability, latency, cost, and reliability.Navigate ambiguity effectively; translate vague or high-level requirements into actionable implementation plans.Collaborate with cross-functional partners including product management, frontend, UX, data, and operations to define requirements, plan implementations, and deliver features.Ensure high code quality by writing, reviewing, and improving unit/integration tests; actively participate in code reviews.