Senior Backend Engineer - TypeScript at commercetools | Berlin

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.

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.

Join our dynamic and innovative team at bitlane as a Senior Backend Developer. We are seeking a passionate software engineer to contribute to our product development journey from conception to deployment and beyond. In this role, you will collaborate closely with project managers and frontend developers to ensure that we meet and exceed our project requirements. The ideal candidate will possess a deep understanding of software engineering principles and industry best practices, delivering clean, maintainable, and error-free code with robust test coverage. You will be responsible for writing automated tests, conducting code reviews, and taking end-to-end ownership of your projects. We value problem solvers with an inquisitive and innovative mindset, ready to leverage their software development skills to create new services. Your role will involve backend development across a variety of projects, ranging from small applications and single-page websites to comprehensive e-commerce systems and complex CRM solutions. If this resonates with your skill set, we look forward to receiving your application!Responsibilities:Collaborate with our software team to design and launch new featuresEnhance our product and codebase with your analytical insightsMaintain our systems at the cutting edge while developing our growing environmentExpand our existing web technology portfolioCreate new microservices using AWS and improve existing onesDevelop and maintain tools for software and data interactionDefine project scope in collaboration with project managersCommunicate your work status and meet deadlines established with project managers

Be a Part of Our Vision at Doctolib!Your RoleWe are seeking a dedicated Senior Backend Software Engineer to join our newly established team focusing on user rights and permission management. In this pivotal role, you will set the benchmark for access control within the Doctolib platform, safeguarding sensitive user and financial data while facilitating efficient workflows for healthcare professionals.Your key responsibilities will include:Developing Advanced Authorization Systems: Create and deploy scalable authorization frameworks, incorporating role-based and API-driven controls that cater to both clinical and financial functionalities.Modernizing Legacy Systems: Streamline and enhance legacy access models (such as EHR authorizations) to ensure compliance with data protection and privacy regulations.Cross-functional Collaboration: Partner closely with product, legal, and data protection teams to deliver privacy-compliant solutions.API Development: Design and manage robust APIs for permissions and authorization, enabling extensive platform integration.Implementing Access Control: Establish access control measures for emerging roles, such as Medical Front Assistant and new Clinical & Financial administrative positions.About Our Technology LandscapeOur solutions are built on a fully cloud-native platform supporting web and mobile app interfaces, multilingual capabilities, and tailored to meet country and healthcare specialty requirements. We are modularizing our platform to operate within a distributed architecture through reusable components.Our technology stack includes Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native.We utilize AI ethically across our products to empower both patients and healthcare professionals. Discover our AI vision here and learn about our inaugural AI hackathon here!

Note: This position requires relocation to our Milan office.About SatispayAt Satispay, we aim to transform everyday payments into a straightforward, equitable, and accessible experience for all. Our mission now extends to shaping the future of financial transactions.We are a dynamic movement empowering millions, united by our ambition to confront significant challenges. Our fast-paced culture encourages bold thinking, collaboration, and continuous growth.If you seek more than just a typical job—if you're eager to collaborate with a talented team to create something meaningful—you've come to the right place.Your ResponsibilitiesAs a Senior Backend Software Engineer within the Business Team, you will be instrumental in designing the future of digital welfare payments, overseeing everything from employer benefits to intricate product offerings. Your role will encompass the entire journey for employers and employees, ensuring their long-term satisfaction. You will guide the technical direction, maintain quality, and ensure the delivery of complex systems affecting multiple services that enable thousands of employers to manage their corporate welfare efficiently. Here’s what a typical day looks like:Develop Multi-Service Solutions: Lead technical analysis for medium to large projects that affect multiple services in the Employer domain. Design comprehensive, reliable solutions with a focus on scalability, security, and maintainability for products that define the core of welfare.Maintain Technical Quality: Implement strong testing strategies that balance automation with manual oversight, and manage gradual rollouts with stringent monitoring to ensure precision and reliability in welfare distributions.Proactively Address Challenges: Anticipate and resolve technical challenges, fostering knowledge sharing within the organization. Tackle unique B2B registration flows and high-volume benefit allocations while ensuring code quality through diligent reviews.Ownership of Execution: Take full responsibility for your projects from conception to completion, delivering features that truly address user needs—from the employer's signup process to the employee's first use of welfare benefits—through seamless backend integration.

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.

Join Databricks as a Senior Staff Software Engineer! At Databricks, we are passionate about empowering data teams to tackle some of the world's most challenging problems, ranging from security threat detection to groundbreaking cancer drug development. Our mission is to build and operate the finest data and AI infrastructure platform, allowing our customers to concentrate on the high-value challenges central to their missions. Our engineering teams develop sophisticated products that address significant needs globally. We are responsible for one of the largest-scale software platforms, consisting of millions of virtual machines that generate terabytes of logs and process exabytes of data daily. Given our scale, we frequently encounter cloud hardware, network, and operating system issues, and our software is designed to shield our customers from these challenges seamlessly. The Delta DML team is responsible for the core write-path operations of Delta Lake, the open-source storage layer powering the Databricks Lakehouse. Our goal is to deliver top-tier performance and a smooth user experience at massive scales, with the majority of data processed in Databricks traversing our platform. We spearhead performance innovations such as Low Shuffle Merge and Deletion Vectors, and actively contribute to open-source initiatives to unify Delta and Iceberg formats. We are looking for a highly capable and experienced Senior Staff Software Engineer to join our backend team. In this pivotal role, you will be key in designing, developing, and maintaining robust backend systems that power Databricks workspaces. You will create the next-generation platform for serving workspace assets, ensuring high queries per second (QPS), low latency, reliability, and performance, while proactively addressing future growth challenges. Additionally, as a senior team member, you will provide technical leadership, mentorship, and guidance to junior engineers, enhancing overall team coding practices and system designs. Your Impact: Address real business needs at scale through your software engineering expertise. Conduct low-level systems debugging, performance measurement, and optimization on extensive production clusters. Architect design solutions, influence product roadmaps, and take ownership of new projects. Implement tools to enhance automation and operability of services. Utilize your extensive experience to help prevent and investigate production issues. Plan and lead complex technical projects that involve collaboration with multiple teams across the company. Act as a technical team lead by mentoring others, leading sprint planning, delegating tasks, and participating in project planning.

Attention: This position requires relocation to our Milan office.About SatispaySatispay is on a mission to transform everyday transactions, making them straightforward, equitable, and accessible for all. Our ambition is to redefine the future of money.We are a collective of innovators empowering millions, united by a common goal to address significant challenges. We are just getting started, moving swiftly, thinking daringly, and fostering a culture of trust that encourages us to question the status quo while learning and evolving along the way.As a member of the Core Team, you will engage with critical systems encompassing external bank interactions, payment orchestration, and the foundational infrastructure for Identity and Access Management (IAM). Moreover, the team manages risk-oriented services, particularly in credit risk management and fraud detection.If you're eager to contribute to impactful projects that form the backbone for all our product teams, you've found the perfect place.Your ResponsibilitiesAs a Senior Backend Software Engineer within the Core Team, you will be pivotal in crafting the infrastructure of our payment platform. Your role will encompass ensuring the technical excellence and delivery of intricate systems that influence various services and product teams throughout the organization.Your daily tasks will involve:Engine core platform domains: You will assist in the design and advancement of our most sensitive systems, such as the Transaction Ledger, IAM, and Payment Orchestration. You'll ensure these systems remain high-performing, scalable, and functional for seamless integration by our product teams.Scale risk & financial engines: You will enhance and implement services dedicated to bank integrations, credit risk, and real-time fraud detection, establishing robust logic to protect our source of truth and secure Satispay’s financial ecosystem.Cross-team technical leadership: You will spearhead technical analyses for projects that involve multiple services, leading discussions and producing comprehensive documentation (Smart Papers) to guarantee that your designs are robust and clearly understood by stakeholders and other engineering teams.

Hello! At AMBOSS, we are on a mission to revolutionize medical education, and we are seeking a dedicated Software Engineer to join our innovative team!About AMBOSSFounded in 2012, AMBOSS is a forward-thinking learning and clinical decision support platform designed to empower medical professionals worldwide. Our cutting-edge technology transforms the way healthcare providers acquire and implement scientific knowledge, enabling them to offer the best possible care. Our team, known as AMBOSSians, is passionate about supporting clinicians and making their practice easier and more enjoyable.Why Join Us?As a Software Engineer in our ExamPrep Team, you will play a pivotal role in supporting healthcare learners as they prepare for exams. We provide personalized and adaptive Qbank content, predictive analytics, and tailored study recommendations, fostering confidence in approaching their assessments. Your contributions will directly impact the success of current and future medical professionals.Curious about our culture? Check out our video to discover what sets us apart.Your Responsibilities:Explore a diverse and complex product landscape, becoming an expert in both technical aspects and medical education requirements.Enhance personalized learning experiences through the deployment of deep analytical insights.Take ownership of feature development from inception through deployment and monitoring.Create testable prototypes and transition them into robust production systems.Contribute to the strategic vision and roadmap of the team’s product development.Collaborate closely with engineers, product managers, designers, medical editors, and marketing teams.Foster a strong engineering culture by sharing knowledge, practices, and experiences.Participate in team workshops at AMBOSS offices (travel approximately every two months).Your Profile:Proficient in Python with strong backend development expertise.Experience with frontend technologies (React, JavaScript/TypeScript) in a professional setting.Ability to work collaboratively in a team-oriented environment.Enthusiasm for continuous learning and professional development.

Join Us as a Senior Backend Engineer - PaymentsAbout This RoleIn this pivotal role, you will be part of the Everyday Banking domain within our Payments team. You will play a key role in managing and processing payment and card transactions through sophisticated, high-volume systems, ensuring our customers enjoy the best banking experience every day. Our team is dedicated to making banking simple, dependable, seamless, and secure for all our users.This position is hybrid, based in our Berlin office.Your ResponsibilitiesCollaborate closely with your Tech Lead to architect and implement new features from concept to completion.Design, develop, test, deploy, and maintain quality software in a dynamic environment.Mentor junior team members by upholding code quality through thorough pull requests and support.Keep abreast of the latest technology trends and share insights during our Get Stuff Done Days (GSDD).Work collaboratively within your cross-functional team to maintain the highest technical standards across our product.Qualifications for SuccessProficient in software development using a JVM language, particularly with Spring Boot in large-scale production environments (experience with Kotlin is a plus).Strong understanding of microservice architecture.Familiarity with both relational and non-relational databases, preferably Postgres.Appreciation for modern cloud architecture, ideally with AWS.Key Traits:Proactive in seeking success for yourself and others.Committed to continuous learning and challenging the status quo.Global mindset with local action.Strong bias for action and timely feedback, both giving and receiving.What We OfferAccelerate your career by joining one of Europe's most innovative disruptors.

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.

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

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.

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 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.

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.

Join our dynamic team at peec as a Senior Backend Engineer, where you will play a crucial role in building and scaling our backend systems. Your responsibilities will include overseeing complex backend architecture, ensuring reliable delivery of high-quality systems, and collaborating with cross-functional teams to create innovative solutions.Key ResponsibilitiesTake ownership of complex backend systems from scoping to architecture and delivery.Design and develop robust, scalable APIs and distributed systems that enhance product performance.Collaborate with Product, Frontend, and Design teams to implement well-structured backend solutions.Drive innovation in backend technologies, enhancing both architecture and developer experience.Support the evolution of our backend infrastructure and developer tools for rapid scaling.Identify and implement improvements for system performance, reliability, and developer experience.

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.

Your Role We are seeking a skilled Backend Engineer with a strong interest in telecommunications and a deep passion for software development, particularly in big data technologies. In this role, you will be pivotal in the real-time processing of our data, driving microservices and fostering a fully data-driven environment within the company. This position can be based in our emnify offices located in Berlin or Würzburg, or remotely from Germany or Poland. Your Impact Collaborate within one of our service squads, taking charge of designing, building, testing, and managing components or projects that influence the pricing and charging mechanisms at emnify. Develop APIs and real-time data processing applications utilizing streaming technologies within the Apache Kafka ecosystem, prioritizing scalability and reliability. Engage with a team on core telecommunication functions such as automated product lifecycle management in a modern cloud-based setting. Architect and design aforementioned components to operate on AWS in a scalable manner. As part of a collaborative team, you will be responsible for deploying and managing these applications using CI/CD tools such as Jenkins and Terraform, along with monitoring solutions like Grafana and Prometheus. Your Skills Proven experience in full-cycle engineering from Proof of Concept (POC) to production with JVM-based languages, preferably Scala, as a significant portion of our codebase is in Scala. Demonstrated experience in stream/data processing, cloud computing, and API development. Strong understanding of microservices architecture and design principles. Excellent problem-solving abilities and a proactive approach to challenges. Ability to work effectively within a diverse team.