Join our dynamic team at dev2 as a Backend Software Engineer! In this role, you'll have the opportunity to design and develop robust backend systems that drive our innovative products. Your expertise in backend technologies will play a crucial role in enhancing our software solutions and improving the user experience.We are looking for passionate individuals who thrive in a collaborative environment. If you are eager to tackle complex challenges and contribute to impactful projects, we want to hear from you!

jobgether is looking for a Backend Engineer based in Germany. This position centers on building and maintaining the backend systems that support our platform. Role overview The Backend Engineer will work closely with front-end developers and other team members to deliver reliable, efficient applications. The main focus is on developing server-side features and ensuring the backend infrastructure meets the needs of the platform. What you will do Develop and maintain backend systems that power jobgether’s platform Collaborate with front-end developers to create seamless user experiences Use expertise in server-side languages and frameworks to improve product features Requirements Strong experience with server-side programming languages and frameworks Ability to work effectively with cross-functional teams Based in Germany

About the Role airapps is looking for a Backend Engineer to help shape backend systems for our applications. This position is based in the Berlin Metropolitan Area. What You Will Do Design and build backend systems that support our products Focus on scalability and performance throughout development Location Berlin Metropolitan Area

airapps is looking for a Backend DevOps Engineer to help improve and automate software development workflows. This position is based in the Berlin Metropolitan Area and involves working alongside both software developers and IT staff. Role overview This role focuses on managing application deployments and maintaining system reliability. The Backend DevOps Engineer will play a key part in streamlining processes to support the development team and keep systems performing well. Collaboration Expect to work closely with colleagues across development and IT, sharing responsibility for smooth releases and stable infrastructure. Location This position is located in the Berlin Metropolitan Area.

Join Our Team at JimdoAt Jimdo, we empower solopreneurs and micro-businesses to thrive by simplifying the journey of building successful online ventures. Since our inception in 2007, we have evolved from a small initiative in a Northern German farmhouse to a leading AI-driven platform with a diverse team of over 220 professionals from more than 50 nations, helping to create over 36 million websites worldwide.We believe in personalized, data-driven guidance that combines design, business tools, and cutting-edge AI technology to transform real user insights into actionable steps for our customers. Our mission is clear: to help self-employed individuals navigate the complexities of running a business with confidence.Your Role:As a Senior Backend Engineer, you will be instrumental in enhancing and scaling our backend systems, ensuring they deliver optimal performance and reliability. You will collaborate with cross-functional teams to create seamless integrations and contribute to our commitment to innovation.Your Contributions:Design, develop, and enhance API services with a focus on scalability and performance.Work closely with cross-functional teams to understand requirements and ensure backend solutions are fully integrated.Maintain high standards of code quality through thorough reviews and testing.Diagnose and resolve backend issues to minimize downtime and enhance performance.Stay abreast of industry trends and best practices in backend development.Provide valuable insights and feedback to the Tech Lead and stakeholders regarding backend solutions.

About NomosAt Nomos, our mission is to make energy accessible and cost-effective for households across Europe. We collaborate with leading technology firms to innovate energy solutions that integrate seamlessly with electric vehicles, heat pumps, battery storage systems, and more, driving down costs for consumers.About the TeamFounded by Stefan and Nils in 2024, our diverse team comprises former researchers, entrepreneurs, and senior engineers. We are united by our shared vision to revolutionize the energy landscape in Europe, fueled by a collective frustration with the existing system. We cherish a culture of open communication, accountability, and inclusivity, and we thrive in our Berlin Mitte office, valuing meritocracy and craftsmanship.Your RoleArchitect for the Future: You will help design and enhance our own operating system, which includes a modular billing engine and energy market communication protocols. Your role is crucial in ensuring our architecture keeps pace with exponential growth.Simplifying Complexity: The energy sector is rife with challenges. Your task is to tackle this complexity by developing clear abstractions and reducing the difficulty of shipping new features.Quality Over Speed: We believe in balancing speed with quality. You will ensure that we invest the time necessary to build reliable solutions that facilitate future growth.Upholding Standards: You will set engineering benchmarks, evaluate critical code, and maintain accountability within the team. Your vigilance will help us avoid shortcuts and uphold best practices.ResponsibilitiesDesign and enhance the core systems powering Nomos, including billing, procurement, metering, partner integrations, and comprehensive data pipelines.Focus on correctness, performance, and resilience. Always consider system behavior under significantly increased loads.Leverage AI tools to streamline repetitive tasks while maintaining ownership of the overall architecture and decision-making process.

About ClickHouseRanked among the most innovative firms on the 2025 Forbes Cloud 100 list, ClickHouse is a fast-evolving leader in the private cloud sector. With a rapidly expanding customer base exceeding 3,000 and an annual recurring revenue (ARR) growth exceeding 250% year-over-year, ClickHouse excels in real-time analytics, data warehousing, observability, and AI-driven workloads.The company’s impressive trajectory has been reinforced by a recent $400M Series D funding round. In the last three months, notable clients such as Capital One, Lovable, Decagon, Polymarket, and Airwallex have either adopted or enhanced their use of our platform. These entities join a prestigious roster of AI pioneers and global giants like Meta, Cursor, Sony, and Tesla.We are committed to revolutionizing how organizations leverage data. Join us on this transformative journey!Become a part of our mission to innovate Observability for Developers! We aim to redefine how engineers monitor, debug, and scale their production applications through HyperDX, now a part of ClickHouse. HyperDX is an open-source platform that converts telemetry data into actionable insights. Envision a world where logs, metrics, traces, and session replays integrate effortlessly to identify root causes with unprecedented speed. If you’ve ever been frustrated at 2 AM with tools like Grafana, Datadog, or Elastic for not providing the insights you need, you’ll understand the challenge we’re addressing. Now, you have the opportunity to help us tackle this issue.We are seeking a Senior Backend Engineer to contribute to the development of a petabyte-scale, high-performance observability platform, with a strong emphasis on delivering an exceptional developer experience (the DX in HyperDX).

Empowering Every Employee.Our mission is to be the world's most utilized AI employee experience platform, transforming the way frontline employees operate.At Flip, we aim to revolutionize the workplace for frontline workers, ensuring every employee has a voice. Become a Flip Game Changer and collaborate with a dynamic team dedicated to providing all employees access to their company's internal resources. If you're eager to make a significant impact and enhance the work lives of millions, this is the opportunity for you!Job OverviewWhat You Can ExpectLead a team of engineers in the design, development, and operation of our employee communication platform, leveraging PostgreSQL and RabbitMQ, including structured, chat-driven workflows.Engage in hands-on engineering work for at least 70% of your time, with the remainder dedicated to technical leadership responsibilities.Work primarily with our Flows subsystem, predominantly built in Go, with some components in PHP/Symfony, and additional parts utilizing a JVM-based (Kotlin, Micronaut) stack.Collaborate remotely within international, cross-functional agile teams.Adopt modern software engineering practices, including API-first development, code reviews, automated testing, and exploratory testing environments.Manage deployment (Kubernetes, Helm) and monitoring (Grafana, Sentry, Mixpanel) of services within your teams, supported by a dedicated SRE team for on-call duties.Participate in customer calls with your product manager to understand their challenges and empower your team to create relevant solutions.Take initiative on technical topics important to you, driving key decisions and fostering alignment across our backend guild.

About JimdoAt Jimdo, we empower self-employed individuals and micro-businesses by simplifying the journey to success. Founded in 2007 by three friends in a farmhouse in Northern Germany, we have evolved into a profitable, remote-first company with over 220 employees from more than 50 nationalities, operating in over 15 countries. With over 36 million websites created, we are more than a website builder; we are an AI-driven platform that supports our users in running and growing their businesses effectively.Our commitment to personalized, data-driven guidance ensures that our platform provides clear insights and actionable steps, allowing our customers to focus on what truly matters for their business growth.Role Overview:As a Senior Backend Engineer for JimdoPay, you will play a crucial role in developing our integrated payment solution designed to support solopreneurs with a comprehensive suite of payment capabilities. You will contribute to key features, including embedded payments, link-to-pay options, and intelligent quoting tools. Collaborating closely with product, design, and engineering teams, you will ensure the delivery of secure and scalable backend services leveraging top Payment Service Providers (PSPs).Your Impact:Develop REST APIs using Kotlin or Java with a strong focus on scalability, reliability, and performance.Implement secure and efficient integrations with payment APIs.Design and develop RESTful services and event-driven architectures.Manage data storage effectively using relational databases.Contribute to CI/CD pipelines and automated testing processes.Work collaboratively across teams to deliver comprehensive solutions.What You Bring:Over 6 years of experience in backend software development.Strong expertise in Kotlin or Java.Proven skills in REST API design.In-depth experience with relational databases.Familiarity with CI/CD practices and testing automation.Excellent collaboration skills for cross-functional teamwork.

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.

About the CompanyCoretylynt is an innovative AI-powered trade platform revolutionizing industrial supply chains in infrastructure, energy, and construction materials. By linking verified suppliers across Asia, Europe, and the GCC region with local demand through a comprehensive integrated system, we are transforming the way materials are traded.Our proprietary AI technology automates and digitizes the entire lifecycle of materials trade, covering procurement, pricing, inventory management, logistics, and embedded financing. This replaces traditional, manual processes with real-time orchestration, enabling buyers to receive instant quotes, ensure reliable availability, and predict delivery times through a unified operating system.For suppliers, we offer precise forecasting and effective demand management while facilitating seamless integration into cross-border fulfillment networks. We collaborate with leading brands to manage both dropship and cross-dock fulfillment for large transactions, turning global supply chains into systematic, software-like workflows.With backing from top-tier investors, we have achieved substantial growth, operating across six international markets and rapidly moving towards profitability. Our team of over 80 professionals, based in Berlin (our headquarters) and Asia, is dedicated to developing the world’s first industrial-grade AI operating system for materials, fundamentally redefining global trade in one of the most crucial sectors.In the realm of FinTech, precision is paramount. As a Backend Engineer, you will be responsible for the backend infrastructure that underpins payments, financial data handling, reconciliation, and compliance-critical workflows, where accuracy and auditability are essential.Tech Stack: Java 21 (Spring Boot 3), Python, PostgreSQL, AWS, Kinesis, Terraform, GitHub Actions, TypeScript.

At xneelo, we are driven by purpose and committed to enabling businesses through our exceptional hosting services. Our mission is to empower customers to establish and conduct transactions online with confidence. Each day, we strive to maintain our customers' trust through our brand promise of being 'trusted in hosting'. We provide reliable web hosting services focused on infrastructure stability, value for money, and consistent service delivery.Our backend software engineers play a crucial role in ensuring that when a customer interacts with our web application, the necessary actions seamlessly occur within our global hosting infrastructure.Managing a large-scale, mass-market hosting infrastructure involves overcoming complex challenges that demand quality automation and processes to ensure optimal performance around the clock, every day of the year.At xneelo, product development hinges on engineering our backend infrastructure, which is vital for transforming complexity into simplicity and delighting our customers.We are passionate about the frequent, iterative delivery of high-quality software and aim to build enduring solutions by embracing Agile principles and leveraging the latest technologies available. Our teams are autonomous and take full responsibility for their segments within the xneelo ecosystem, requiring a solid understanding of Agile development methodologies.Excited about this opportunity? Here’s what you'll be doing:Addressing intriguing and large-scale backend technical challenges.Contributing to continuous improvement in our processes and practices.Identifying opportunities for innovation and optimization.Collaborating with Product Owners and stakeholders to understand customer needs and deliver innovative, robust solutions.Providing operational support to customers when escalated through the Client Services team.Your passion likely includes:Programming, open-source technologies, and IT in general.Creating optimal systems with straightforward procedures.Agile development and thriving in a self-organizing team environment.Collaborating and sharing innovative ideas.

About the Companyandercore is a pioneering AI-driven trade platform reshaping the industrial supply chain for critical sectors including infrastructure, energy, and construction materials. By connecting thoroughly vetted suppliers across Asia, Europe, and the GCC region with local demand, our integrated platform streamlines the procurement process.Our proprietary AI technology digitizes and automates the entire materials trade lifecycle — from procurement and pricing to inventory management, logistics, and embedded financing. This innovative approach replaces cumbersome manual processes with real-time orchestration, enhancing efficiency.Buyers experience faster access to quotes, reliable availability, and predictable delivery through our unified operating system. Meanwhile, suppliers benefit from improved forecasting, disciplined demand management, and seamless integration into cross-border fulfillment systems. We collaborate with industry-leading brands to manage both dropship and cross-dock fulfillment operations for high-volume transactions, transforming global supply chains into predictable, software-like workflows.With a robust growth trajectory and triple-digit-million GMV, we are actively expanding our presence across six international markets, moving swiftly toward profitability. Our team of over 80 professionals, based in our Berlin headquarters and Asia, is dedicated to building the world’s first industrial-grade AI operating system for materials, fundamentally altering the landscape of global trade in one of the world's largest and most vital industries.Supported by top-tier investors and global institutional banking partners, we proudly closed a $40 million Series B funding round, with contributions from Atomico, Project A, and Invent Capital, alongside institutional backing from Commerzbank and KfW.In the world of finance, precision is paramount. As a Backend Engineer, you will be integral to the backend infrastructure that manages payments, financial data, reconciliation, and compliance-critical workflows, where accuracy and auditability are essential.Tech Stack: Java 21 (Spring Boot 3), Python, PostgreSQL, AWS, Kinesis, Terraform, GitHub Actions, TypeScript.

About Qualifyze,Founded in 2019, Qualifyze is at the forefront of supply chain compliance management within the Life Sciences sector, earning the trust of over 1,500 pharmaceutical and healthcare organizations globally. Our comprehensive digital solutions seamlessly connect manufacturers, suppliers, and a vast network of over 250 auditors and quality professionals.With an impressive record of more than 4,500 audits conducted across 85+ countries, we boast the largest and most accurate supplier network, complemented by robust data analytics tools. Qualifyze is your ideal partner for ensuring quality compliance and mitigating supply chain risks in the Life Sciences industry.Role OverviewWe are on the lookout for a Senior Backend Engineer to enhance our Tech department, particularly within the Engineering team. You will join a dynamic group of over 50 professionals dedicated to engineering and data. Our technology stack prominently features TypeScript with React and Node.js, alongside Java for specific projects.At Qualifyze, we believe that software engineering transcends mere coding—it’s about shaping the future. We seek engineers who recognize that every line of code contributes to a lasting legacy. As part of our team, you will focus on streamlining feedback loops, developing scalable solutions, and fostering clear communication with the business. You will advocate for clean architectures, robust testing strategies, and domain-driven design principles to deliver substantial value at every step.Main ResponsibilitiesLead backend architecture, testing, and technical decisions across teams, ensuring scalable, high-quality outcomes while adhering to best practices.Tackle and resolve intricate tasks within large-scale projects, or independently manage smaller projects.Effectively communicate and collaborate with team members, the DevOps team, product managers, and the design team. You will spearhead the technical strategy, translating product requirements into clear, functional solutions.

As a Senior Backend / Platform Engineer at causaprima, you will take charge of the foundational platform that empowers our agents. This includes overseeing an event-driven architecture, managing data pipelines, integrating with customer accounting systems, and ensuring the infrastructure is reliable, auditable, and swift.Key ResponsibilitiesEvent Store Management — Lead the development of an append-only PostgreSQL event store featuring tamper-evident hash chaining, real-time event distribution, agent replay capabilities, and schema versioning.Cryptographic Signature Infrastructure — Implement key management and signature verification for all agent events, including establishing approval chains for external actions.Workflow Constraint Engine — Develop a robust gateway that verifies authorization before any external action (email, payment, API call) is executed.PII Vault & GDPR Compliance — Ensure the safe storage of personal data through isolated, encrypted solutions, allowing for the right to erasure and data residency per region.Multi-Tenancy Architecture — Design systems that incorporate row-level security and tenant isolation across all data stores, including tenant-scoped LLM API keys.Authorization (Cerbos) — Implement attribute-based access control for agents and humans with deterministic policy evaluations, ensuring LLMs are not responsible for authorization decisions.MCP Security Layer — Establish authentication protocols, capability-based scoping per partner, and rate limiting for the Model Context Protocol endpoint.Database Architecture — Drive PostgreSQL schema design, create effective indexing strategies, and enhance performance tuning and read replica topology.

Full-time | Munich | Seed Stage | Equity + SalaryJoin Us in Building a Transformative CompanyAt Knowlix, we are dedicated to amplifying the productivity of small businesses tenfold. Our goal is to establish ourselves as the premier platform for human-AI and AI-to-AI collaboration.Although we are in the early stages, we have grand ambitions. This is a unique chance for you to influence a product that will reach millions and set industry standards.We prioritize speed, frequent iterations, and exceptional quality. If you are passionate about building, deploying, and scaling innovative solutions, particularly leveraging AI for significant improvements, this is the opportunity for you.Why Choose Knowlix Now?We are a well-funded seed-stage startup, supported by top-tier investors and seasoned founders.Our technology is functional and our initial users are experiencing its transformative effects.We are targeting a vast market with a product that revolutionizes work dynamics.As one of our early team members, you will have significant influence and ownership over the company’s direction.We believe that rapid progress is achieved through focused efforts and continuous iteration.This isn't just a job; it's a chance to contribute to a once-in-a-generation company if we execute our vision effectively.The RoleWe are seeking a pragmatic and enthusiastic Backend Engineer with robust skills in Python and a strong understanding of SQL and cloud infrastructure. You will collaborate closely with AI researchers, product designers, and DevOps engineers to create a seamless interface between human users and our AI systems. Familiarity with Go, Rust, and Swift is advantageous, especially for future components such as microservices or mobile interfaces.

About UsHelsing is a pioneering defense AI company dedicated to safeguarding our democracies. Our goal is to achieve technological excellence to ensure that open societies can maintain their sovereignty and ethical standards.We recognize our unique obligation to approach the development and implementation of advanced technologies like AI with care and consideration. This is a responsibility we uphold with utmost seriousness.Our team consists of driven engineers, AI experts, and program managers who are passionate about solving complex, impactful challenges. We invite mission-oriented individuals to join our European teams and leverage their skills to address these critical issues. Our culture is grounded in transparency and encourages healthy discussions about the use of technology in defense, its advantages, and ethical considerations.The RoleAt Helsing, we create and implement AI-driven capabilities and the foundational infrastructure that enables semi-autonomous platforms to localize, navigate, and interpret their environments in real-time. Our software operates under stringent and unconventional technical constraints, adapts to a multitude of ever-changing environments, and supports a diverse array of demanding use cases. The solutions we develop are utilized by individuals in high-pressure, high-stakes situations, which necessitates a design that is both reliable and seamless. This presents a variety of exciting engineering challenges across several domains that you will help us tackle.

Join our innovative team at Taktile as a Backend Engineer focused on our cutting-edge Data Marketplace. In this role, you will design and implement robust backend solutions that drive the scalability and efficiency of our data services. You will collaborate with cross-functional teams to enhance our platform, ensuring seamless data integration and accessibility for users worldwide.

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.