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 En…

This position is based in Berlin, Germany. Relocation support is available for those who need it. Role overview Trade Republic is building Europe’s largest savings platform, serving over 10 million customers in 18 countries and managing assets exceeding €150 billion. The team focuses on making wealth-building accessible, secure, and free for everyone. As a Backend Engineer (Haskell), you will help develop and improve products that support this mission. What you will do Design, build, and test backend services and products using tools from the JVM ecosystem, including Kotlin, Spring, Vert.x, Hibernate, jOOQ, and Haskell. Architect and maintain cloud services on AWS, prioritizing high availability, low latency, and scalability. Set up and manage automated software delivery using GitHub Actions, container-based CI/CD pipelines, and Kubernetes. Requirements At least 5 years of software engineering experience, ideally in the JVM ecosystem, with hands-on production experience in Haskell. Solid grasp of functional programming concepts and practical experience with the Haskell toolchain (GHC, Cabal, Stack, and related libraries). Demonstrated ability to develop and deploy scalable features in a service-oriented architecture. Dedication to building reliable, maintainable software through iterative development and continuous delivery. Experience creating foundational platform services that support and speed up product development (background in platform-focused teams is a plus). Our culture Trade Republic values ownership, high standards, and energy. The team is committed to delivering results and tackling major challenges in Europe’s financial landscape.

Join our dynamic team at Contentful as a Senior Software Engineer specializing in Backend & Infrastructure. In this pivotal role, you will design and implement robust backend systems that power our content platform. Collaborate with cross-functional teams to enhance our infrastructure, driving innovation and efficiency in our development processes.

Join our innovative team as a Backend Engineer focused on enhancing our Search Engine capabilities. In this role, you will be instrumental in developing and optimizing backend solutions that improve search efficiency and user experience. Leveraging your expertise, you will collaborate with cross-functional teams to design scalable and robust systems that meet our rapidly growing needs.

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 Almedia, a forward-thinking company that accelerates career growth for those eager to push the boundaries. As Germany's aspiring second bootstrapped unicorn and Europe’s #3 fastest-growing company according to the FT1000 in 2025, we are revolutionizing marketing by rewarding our community of over 60 million users for engaging with top brands.We are on the lookout for a talented Backend Engineer to enhance our AdTech platform. If you have a passion for developing scalable and high-performance web applications and thrive in a collaborative team environment, we want to hear from you!Tech Stack:TypeScript, NestJS, Jest.GraphQL, REST, gRPC, WebSockets.MySQL, MongoDB, Redis, BigQuery.RabbitMQ, Google Pub/Sub.Docker, Kubernetes, GitLab CI/CD.Datadog.What You’ll Do Write clean, efficient, and scalable code utilizing NestJS and TypeScript.Create a data-driven product by integrating external services for A/B testing and feature flagging.Deliver high-quality, testable code swiftly, ensuring smooth operations.What You’ll Bring Proven experience in web development.Solid understanding of scalable systems.Experience with most of our tech stack in a production environment.An ownership mindset: taking full responsibility for your work.Strong English communication skills for effective teamwork.What Makes You a Great Fit Experience with microservices architecture.Background in DevOps/SRE practices.Why Choose Almedia? Dynamic work environment.Fast career advancement opportunities.Innovative projects with real impact.

Join almedia as a Backend Engineer specializing in FastAPI. In this role, you will be responsible for developing and maintaining robust backend services that power our innovative digital solutions. Collaborate with cross-functional teams to create scalable applications that enhance user experiences.

About the CompanyAndercore is an innovative AI-driven trading platform revolutionizing industrial supply chains in sectors such as infrastructure, energy, and construction materials. Our platform seamlessly connects vetted suppliers from Asia, Europe, and the GCC region with local demand, offering a single integrated solution.Leveraging our proprietary AI stack, we digitize and automate the entire lifecycle of materials trade—from procurement and pricing to inventory management, logistics, and embedded financing—eliminating countless manual and relationship-driven processes in favor of real-time orchestration.Our platform provides buyers with instant quotes, dependable availability, and predictable delivery through a unified operating system. Suppliers benefit from precise forecasting, disciplined demand management, and seamless integration into cross-border fulfillment networks. By partnering with leading brands, we facilitate both dropship and cross-dock fulfillment for large-scale transactions, transforming global supply chains into predictable, software-like workflows.Scaling to triple-digit-million GMV and operating in six international markets, we are rapidly moving towards profitability. With a passionate team of over 80 professionals based in Berlin (HQ) and Asia, we are developing the world's first industrial-grade AI operating system for materials, redefining operations in one of the globe's largest and most essential industries.Backed by top-tier investors and global institutional banking partners, we recently secured $40 million in Series B funding from Atomico, Project A, and Invent Capital, with institutional backing from Commerzbank and KfW.Join our tech team and collaborate with a group of ambitious and knowledgeable engineers, tackling complex problems while gaining exposure to commercial aspects.The Tech Stack: Python, LangGraph, LLM APIs (OpenAI, Anthropic, Gemini), AWS, GitHub Actions, Node.js, Java 21 (Spring Boot 3), Postgres, Kinesis, Terraform, Typescript, NextJS, React.

Your ResponsibilitiesTake ownership of backend systems that facilitate thousands of hotel bookings daily.Design, develop, and maintain our core booking infrastructure, ensuring robust integrations with PMS platforms, channel managers, and payment processors.Define and support a resilient API layer that drives our React frontend applications.Enhance engineering standards by demonstrating exceptional system design, effective communication, and technical leadership.Collaborate closely with the founders to influence the long-term architecture and cultivate a strong engineering culture.

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!

Join commercetools as a Senior Backend Engineer specializing in TypeScript, where you will play a pivotal role in designing and implementing scalable backend services. Collaborate with a talented team to innovate and enhance our platform, ensuring top-notch performance and reliability.

Join the dynamic team at ABOUT YOU as a Senior Backend Engineer focusing on Sorting. In this role, you will be instrumental in optimizing and developing our backend systems to enhance user experience across our platform. Collaborate with product managers and frontend developers to implement innovative solutions that drive our mission forward.

Join Databricks as a Senior Staff Software Engineer focused on Backend development and be part of a team that is passionate about solving the world's toughest challenges. At Databricks, we empower data teams to turn their visions into reality—from revolutionizing transportation to accelerating medical discoveries. Our cutting-edge data and AI infrastructure platform enables clients to harness deep data insights that elevate their businesses. As a company founded by engineers with a deep commitment to customer satisfaction, we thrive on tackling complex technical challenges, from designing next-gen UI/UX for data interfacing to scaling our services across millions of virtual machines. And we’re just getting started.In this role, you will collaborate with your team to build robust infrastructure and products for the Databricks platform, ensuring they operate at scale.

About Langfuse Langfuse builds an open-source engineering platform for large language model (LLM) applications. Teams use Langfuse for advanced tracing, evaluation, and prompt management to create reliable AI products. As part of the ClickHouse family, Langfuse supports over 2,000 customers, including 19 of the Fortune 50. Each month, the platform sees more than 26 million SDK downloads and over 6 million Docker pulls. Langfuse’s mission is to simplify the process of building useful applications, whether for startups or global enterprises. The company remains committed to open source and self-hosting, working closely with ClickHouse to accelerate product development and drive growth. The engineering team is based in Berlin and San Francisco, with current expansion focused on the EU timezone. Team members are expected to spend about one week per month in the Berlin office. Role Overview: Senior Backend Engineer (IAM and Billing) This position centers on two critical areas: identity and access management (IAM), and billing infrastructure. Work here directly supports both Langfuse Cloud and self-hosted deployments. What You Will Do Design and build the identity and access model that allows large organizations to manage many users, projects, and environments with precise permissions. Develop billing systems that translate billions of trace events into real-time usage metering and invoicing. Ensure authentication and billing remain reliable and secure, as errors in these areas could affect business operations. This work forms the backbone of Langfuse’s systems. The scope and impact are significant, offering a chance to make a real difference in how leading companies manage AI infrastructure. Location and Collaboration Role is open to candidates based in Europe (EU timezone). Expect to spend one week each month in the Berlin office for in-person collaboration.

Join Our Innovative TeamAt SumUp, we are revolutionizing the way businesses operate with our cutting-edge Point-of-Sale (POS) solution. Catering to cafes, shops, bars, hair salons, and various enterprises, our platform streamlines operations with features such as product catalogs, inventory management, insightful business analytics, compliance support, and customer loyalty tools.As a vital part of our Fiscalization team, you will play a crucial role in ensuring fiscal compliance across several European countries including Italy, Sweden, Norway, Belgium, Austria, and more. Your expertise will help pave the way for integrating third-party services and fiscalizing receipts efficiently.In your role as a Senior Backend Engineer, you will work alongside a talented, cross-functional team comprising Product Managers, Product Designers, Engineering Managers, and fellow engineers to tackle complex challenges and deliver tailored solutions.

Join our dynamic team at ABOUT YOU GmbH as a Backend Engineer specializing in recommendations. In this role, you will develop innovative solutions to enhance user experience through personalized recommendations. You will collaborate with cross-functional teams to design, implement, and optimize backend services that support our recommendation algorithms.

Join our dynamic team at ABOUT YOU as a Senior Backend Engineer specializing in search engine technologies. In this pivotal role, you will harness your expertise in backend development to enhance our search engine capabilities and ensure seamless user experiences. We are looking for innovative thinkers who thrive in a collaborative environment and are eager to tackle complex challenges.

We are seeking an experienced Senior Backend Engineer to join our dynamic team at redcare-pharmacy. In this role, you will be responsible for designing and implementing robust backend systems for our mobile applications. The ideal candidate will have a strong background in backend development and a passion for creating efficient, scalable solutions.

About the CompanyAt Affinidi, we are revolutionizing data ownership to empower individuals and businesses. Our technology enables users to take control of their digital identity, ensuring privacy and security while managing their complete digital footprint.We are committed to fostering a trusted ecosystem for decentralized digital identity solutions, allowing seamless data exchange across industries and borders.About the Role:We are looking for a Senior Backend Engineer with expertise in Rust. The ideal candidate will be solution-oriented and possess a strong track record in backend development. You will play a crucial role in our mission to create innovative solutions that enhance data ownership and privacy.

Join our dynamic team at ABOUT YOU GmbH as a Lead Backend Engineer specializing in our Checkout system. You will play a pivotal role in shaping the backend architecture and ensuring a seamless shopping experience for our users. Collaborate with cross-functional teams to design and implement scalable solutions that drive our growth.