Backend Engineer in Berlin

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

Please note that this position is based in Berlin, Germany — relocation support is provided if required.THE BEST WORK OF YOUR CAREERTrade Republic is Europe’s leading savings platform, operating in 18 countries and trusted by over 10 million customers with more than €150 billion in assets. Our mission is to empower everyone to build wealth by providing easy, safe, and free access to financial systems.Join us and take your career to new heights while working alongside a team of exceptional talent and cutting-edge technology to create a positive impact for millions.WHAT YOU’LL BE DOINGDevelop and test services and products using advanced tools from the JVM ecosystem, including Kotlin, Spring, Vert.x, Hibernate, or jOOQ.Design cloud services with a focus on high availability, low latency, and scalability on AWS.Implement automated software delivery utilizing GitHub Actions, container-based CI/CD pipelines, and Kubernetes orchestration.WHAT WE'RE LOOKING FORA minimum of 5 years of experience in software engineering, particularly within the JVM ecosystem.Proven experience in developing and deploying scalable features in a service-oriented architecture.A strong commitment to delivering reliable, maintainable software through iterative development and continuous delivery.Experience building platform services that support product development (prior experience in platform-focused teams is an advantage).WHY YOU SHOULD APPLY NOWOur culture values ownership, excellence, and high energy. We are dedicated to closing the pension gap and democratizing wealth in Europe. If this resonates with you, we encourage you to apply!We believe that the diverse identities and backgrounds of our team make us more innovative and effective. We are committed to fostering an inclusive environment where everyone feels respected and has equal opportunities to thrive in their careers. For any inquiries about diversity and inclusion during the interview process, please contact your recruitment partner.

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 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 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.

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 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 a pioneering cybersecurity and AI startup in Berlin!TechBizGlobal is on the lookout for a Founding Backend Engineer (Go) to be an integral part of our founding team, responsible for architecting the essential security, identity, and enforcement frameworks for our cutting-edge AI-driven security risk management platform.Founded by seasoned cybersecurity experts with roots in Israeli Intelligence, we seek a proactive Backend Engineer (Go) to take on a hybrid role based in the heart of Berlin. If you have a passion for cybersecurity and AI technology, excel in dynamic startup environments, and relish the challenge of building complex systems from scratch, this is your chance to make a significant impact.Our mission is to develop a next-generation cyber risk platform that empowers enterprises to comprehend, assess, and mitigate identity risks at scale. We aim to transform intricate identity and security data into straightforward, actionable insights that Chief Information Security Officers (CISOs) and Chief Technology Officers (CTOs) can rely on. From day one, you will collaborate on core platform components, influencing how modern organizations manage and interpret risk through cloud-native systems, AI analytics, and automated enforcement via AI agents.

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

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

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.

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.

Affinidi develops technology that helps individuals and organizations manage their data with greater control. The company specializes in privacy and security, delivering decentralized digital identity solutions. Its platform enables secure data exchange and digital credential management across various industries and international boundaries. Role overview The Senior Backend Engineer (Rust) will take part in designing and building backend systems that support Affinidi’s digital identity products. This position centers on applying strong Rust expertise to real-world engineering problems, always with a practical mindset. Requirements Extensive experience developing backend systems with Rust Ability to address engineering challenges with practical, effective solutions

About the CompanyAffinidi is a pioneering technology firm committed to revolutionizing data ownership. We empower both businesses and individuals to take control of their data, offering a holistic approach to managing their digital identities while prioritizing privacy and security.Our innovative technology facilitates decentralized digital identity solutions, ensuring that everyone has the right to own and manage their data. We are dedicated to building a trusted ecosystem for digital credentials that enables secure data and service exchanges across various sectors and borders.About the Role:We are looking for a Senior Backend Engineer (Rust) who is solution-oriented and possesses proven experience in backend development using Rust. You will be responsible for designing, implementing, and maintaining robust backend systems that align with our vision of secure, decentralized data management.

Role overview Taktile creates technology that enables banks and fintechs to automate critical decisions, such as credit and risk assessments, in real time. As a Senior Backend Engineer on Team Atlas, the main focus is on developing and maintaining the data infrastructure that powers Taktile’s feature computation platform. This position holds responsibility for the full lifecycle of core backend systems, from initial design through deployment, and plays a key role in shaping the direction of the product. What you will do Design, build, and maintain backend services using Python on AWS, including Lambda functions, DynamoDB, Aurora, and event-driven pipelines that support live production workloads. AI tools are part of the regular workflow. Address complex technical challenges related to latency, reliability, and scalability in backend systems. Take ownership of systems end to end: architecture, implementation, deployment, monitoring, and incident response are all part of the role. Influence architectural decisions and help determine how systems are built, not just what gets built. Contribute to team growth by conducting code reviews, mentoring peers, and improving development tools and processes. Collaborate closely with Product and Design teams to help define new features and guide product direction. Location This role is based at Taktile’s office in Berlin.

About coretylyntcoretylynt is revolutionizing the industrial supply chain with an innovative AI-powered trading platform that facilitates seamless connections between vetted suppliers across Asia, Europe, and the GCC region and local demand. Our integrated platform digitizes and automates the entire lifecycle of materials trade, optimizing processes from procurement and pricing to inventory management, logistics, and embedded financing. This automation replaces thousands of manual, relationship-driven tasks, enabling real-time orchestration of supply chains.Our platform provides buyers with instant quotes, dependable availability, and predictable delivery through a unified operating system. Suppliers enjoy precise forecasting, effective demand management, and smooth integration into cross-border fulfillment networks. Partnering with leading brands, we manage both dropship and cross-dock fulfillment for large-scale transactions, transforming global supply chains into predictable, efficient workflows akin to software systems.With strong backing from top-tier investors and institutional financing partners, coretylynt has achieved triple-digit million GMV, operates in six international markets, and is swiftly moving toward profitability. Our team of over 80 professionals, based in Berlin and Asia, is committed to creating the world’s first industrial-grade AI operating system for materials, redefining how global trade functions in one of the world’s largest and most critical industries.Join our dynamic Tech team, where you will collaborate with highly ambitious and knowledgeable engineers, tackle complex challenges, and gain exposure to commercial aspects.Our 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.

Join our innovative team at bunch as a Senior Backend Engineer where you will play a pivotal role in shaping the future of our backend systems. You will collaborate with cross-functional teams to design, develop, and maintain robust, scalable backend solutions. Your expertise will be essential in ensuring the performance, quality, and responsiveness of our applications.

Cresta is dedicated to transforming every customer interaction into a strategic advantage by harnessing the full potential of contact centers. Our innovative platform merges cutting-edge AI with human expertise, enabling contact centers to uncover valuable customer insights, streamline conversations and processes, and empower team members to operate more efficiently. Founded by Sebastian Thrun, a visionary from the Stanford AI lab and the mastermind behind Google X, Waymo, and Udacity, our leadership team includes CEO Ping Wu, co-founder of Google Contact Center AI, alongside Tim Shi, an early member of OpenAI. We have gathered a stellar team of AI and machine learning specialists, market leaders, and esteemed investors such as Andreessen Horowitz, Greylock Partners, and Sequoia, along with former AT&T CEO John Donovan. Our esteemed clientele features renowned brands like Intuit, Cox Communications, Hilton, and Carmax, and we have been honored by Forbes and Bain Consulting as one of the premier private AI companies globally. Embark on an exhilarating journey with us as we revolutionize the contact center workforce through AI. The future of work is here, and it begins at Cresta!

About the Role airapps is hiring a Backend Quality Assurance Engineer for its Berlin Metropolitan Area team. This role focuses on maintaining and improving the quality and performance of backend systems. As part of the development group, the engineer will help deliver reliable software solutions that meet high standards.