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Senior/Mid-level Fullstack Engineer, Shop & Payments (React/Go)

amboss

Full-time|On-site|Berlin

Join our dynamic team at amboss as a Senior/Mid-level Fullstack Engineer, specializing in Shop & Payments. In this role, you will leverage your expertise in React and Go to enhance our payment solutions and e-commerce functionalities. Your contributions will directly impact our user experience, driving innovation and efficiency within our platform.

Apr 1, 2026

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Backend Engineer, Content-API (Go/React)

amboss

Full-time|On-site|Berlin

Role overview AMOSS is looking for a Backend Engineer to work on Content-API development. The position centers on backend systems that influence both user experience and overall system performance. Go is the main programming language, and the work includes close collaboration with teams using React. What you will do Develop and enhance backend APIs for content delivery Write clear, maintainable code in Go Work alongside frontend teams that use React Identify and solve complex backend issues Help improve system performance Location This role is based in Berlin.

Apr 23, 2026

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Senior Fullstack Engineer at ebreuningergmbhco | Berlin

ebreuningergmbhco

Full-time|Remote|Berlin

Join our dynamic team as a Senior Fullstack Engineer where you will play a crucial role in developing innovative software solutions. In this remote-friendly position, you will collaborate with cross-functional teams to design, build, and maintain high-quality applications that enhance user experience.Your expertise in both front-end and back-end technologies will be essential as you tackle complex challenges and drive improvements across our platforms. We are looking for a passionate engineer who thrives in a fast-paced environment and is eager to contribute to the success of our projects.

Mar 26, 2026

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Senior Fullstack Engineer - Identity

SumUp

Full-time|On-site|Berlin, Germany

Join our dynamic Identity team as a Senior Fullstack Engineer, where you'll play a pivotal role in delivering exceptional authentication experiences and safeguarding accounts for millions of users worldwide. Your expertise will also help create central services that empower teams and products throughout SumUp. We seek an adaptable and proactive individual who is eager to take ownership of their work. Your primary responsibilities will focus on frontend development using TypeScript with frameworks like React and Next.js, effectively bridging the gap to our backend development in Go. As part of a diverse team with a wide-ranging scope, you will collaborate with fellow engineers on transformative initiatives. You will have the opportunity to take charge of projects from inception to execution, including requirements gathering, solution design, and stakeholder communication. About the Team: Our team is cross-functional and deeply rooted in engineering excellence. Expect to work alongside talented and motivated colleagues on impactful projects that reach far and wide. We uphold a high standard in engineering practices and continuously strive to elevate our processes. We emphasize a cohesive team mentality and believe in collaborating as a unified unit beyond technical competencies. Join us! Your Responsibilities: Own the frontend development efforts, while collaborating on the design and building of clean and reliable APIs on the backend that support our frontends. Work closely with Product Designers and Mobile Engineers to create a robust feedback loop. Contribute to our internal Design System, ensuring a seamless experience across platforms. Develop secure and user-friendly self-service features that empower users to manage their accounts and preferences confidently. Engage with a talented, distributed team that values collaboration, learning, and continuous improvement. Enjoy your work! We want someone who is passionate about what they do.

Mar 3, 2026

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Founding Full Stack Engineer (React/Go) - Cybersecurity Startup

techbizglobal

Full-time|Hybrid|Berlin, Berlin, Germany

Join a Pioneering Cybersecurity Startup in Berlin!We are a recently funded startup at the forefront of cybersecurity and AI technology, seeking a Founding Full Stack Engineer (React/Go) to become an integral part of our founding team. You will play a key role in crafting the foundational elements of a cutting-edge AI-driven security risk management platform.Founded by seasoned cybersecurity experts hailing from Israeli Intelligence, we are looking for a dynamic and innovative individual who is passionate about cybersecurity and AI. This hybrid role will be based in the heart of Berlin, allowing you to thrive in a fast-paced startup environment while building complex platforms from the ground up.Our mission is to develop a next-generation cyber risk platform that empowers enterprises to effectively understand, measure, and mitigate identity risk at scale. You will be involved from day one in designing and developing core components of the platform, leveraging cloud-native systems, AI-driven analysis, and automated enforcement through AI agents.

Mar 13, 2026

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Senior Fullstack Engineer

Climatiq

Full-time|Remote|Berlin

About ClimatiqAt Climatiq, we believe in making a positive impact on the planet, not just the profit margins. If you are passionate about driving change, you’ll find your place with us.We are an innovative startup dedicated to integrating carbon intelligence into business decisions globally. Our platform combines the leading emissions database with advanced AI and calculation tools, empowering thousands of sustainability teams to accelerate their efforts in reducing emissions across corporate and product carbon footprints.Our mission is united in the fight against climate change. We prioritize both speed and quality, as the urgency of the crisis compels us to act swiftly without compromising excellence. Trust, transparent communication, and commitment to outstanding results are the cornerstones of our team culture.Based in Berlin, we embrace a remote-friendly approach, enabling collaboration across Europe. Backed by esteemed investors like Alstin Capital, Singular, and Cherry Ventures, we proudly hold B Corp certification.

Oct 29, 2025

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Fullstack Software Engineer at Contentful | Berlin

Contentful

Full-time|On-site|Berlin, Berlin, Germany

About the Opportunity Become a pivotal member of Contentful as a Fullstack Software Engineer (f/m/d) and spearhead innovation in Automations, Workflows, and Collaboration Tools. Join our forward-thinking team at Contentful, where we empower thousands of clients to manage content efficiently at scale. We are on the lookout for skilled Full Stack Software Engineers who are enthusiastic about developing scalable, high-performance applications with cutting-edge technologies. If you are eager to explore the frontiers of Automations, Workflows, and team collaboration within the Contentful ecosystem and possess expertise in TypeScript, React, and Node.js, we would be thrilled to welcome you aboard. What to Expect? Collaborative Innovation: Partner with product managers, designers, and fellow engineers to craft top-tier automation, workflow, and collaboration features for our users. Full Stack Development: Architect, build, and sustain scalable frontend and backend functionalities utilizing TypeScript, React, and Node.js. Collaboration Tools Enhancement: Integrate and implement collaboration technologies to boost team productivity and enhance user experiences across our platform. Holistic Design Perspective: Approach projects with a comprehensive view of components and systems to ensure a seamless user experience. Agile Problem-Solving: Swiftly address bugs and challenges to elevate customer satisfaction. Data-Informed Development: Leverage analytics to guide product decisions and enhance features. Continuous Improvement: Engage in code reviews and contribute to refining our development processes. Stay Informed: Keep abreast of the latest industry trends, especially in automations, workflows, and collaboration tools. Qualifications for Success Proven Expertise: Demonstrable experience as a Full Stack Software Engineer in a product development setting. Technical Mastery: Strong command of TypeScript, React, and Node.js. A keen interest in clean code practices and familiarity with enterprise architectural design patterns. Containerization Skills: Experience with Docker and Kubernetes. Problem-Solving Mindset: Ability to troubleshoot and resolve issues promptly, ensuring smooth operations.

Feb 21, 2026

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Senior Backend Engineer - Go

Talon.One

Full-time|On-site|Berlin

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.

Feb 9, 2026

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Fullstack Engineer - Shopify Integration Specialist

Talon.One

Full-time|On-site|Berlin

ABOUT TALON.ONE:Talon.One is a leading incentives engine that seamlessly integrates loyalty, promotions, and gamification into a comprehensive platform. With robust enterprise-grade security and scalability, we empower businesses to create personalized and profitable promotional campaigns using a variety of data sources.Currently, more than 250 renowned brands, including Adidas, Sephora, and Carlsberg, utilize Talon.One to enhance customer engagement and foster long-term loyalty.ABOUT THE TEAM:Our development team is comprised of experts in frontend and backend development, quality assurance, product management, and visual design. We operate in small, cross-functional teams that promote collaboration and knowledge sharing. Each team is self-sufficient and responsible for a specific feature or area within our platform, fostering an environment of strong collaboration, open communication, and mentorship. We are committed to creating an inclusive workplace, recognizing its importance for our team and the broader tech industry.We are on the lookout for a mid-level Shopify Developer with a strong emphasis on frontend engineering to assist in building and maintaining integrations between Shopify and the Talon.One promotion engine.In this role, you will primarily focus on Talon.One's frontend applications and embedded Shopify apps that enable Shopify merchants to configure, manage, and monitor the implementation of Talon.One promotions in their stores. You will work closely with backend engineers, product managers, and solution teams to provide reliable, user-friendly, and high-quality integration experiences.This position requires professionals who are already residing in Berlin or are willing to relocate to Berlin.ONCE YOU ARE HERE YOU WILL:Design and maintain frontend applications using React and TypeScript specifically for Shopify merchants.Develop and enhance embedded Shopify apps, including setup flows, configuration user interfaces, and diagnostics tools.Integrate frontend applications with Shopify APIs (Admin API, Storefront API, Webhooks), primarily leveraging Shopify’s GraphQL APIs.Collaborate with backend engineers working in Rust and Go to define and construct effective solutions.

Mar 11, 2026

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Junior to Mid-Level Fullstack Software Engineer (m/f/d)

Reonic

Full-time|On-site|Berlin

Are you enthusiastic about software development and the renewable energy sector?If you excel in dynamic, fast-paced, and purpose-driven environments, and you're eager to take ownership of your work, we want to hear from you! Join us in enhancing our innovative frontend solutions that are making a positive impact on the world.About Reonic At Reonic, our goal is to simplify renewable technology through our B2B SaaS solutions tailored for solar energy, storage solutions, and heat pumps. Supported by leading investors and trusted by over 1,600 business clients, we're expanding our engineering team with a Fullstack Developer.Your Role Frontend Development: Engage in the development of our B2B SaaS products, focusing primarily on our feature-rich frontends. Design Engaging Interfaces: Create intuitive and responsive components utilizing React, TypeScript, and Tailwind CSS. Enhance User Experience: Contribute to crafting exceptional User Experiences for our market. Collaborate with Teams: Work closely with Product and Design teams to shape the overall aesthetic of the web application. (Optional) Expand Your RoleDepending on your interests and skill set, you may have opportunities to engage with:Node.js back-end developmentDatabase design and management (especially SQL and bonus points for experience with PostgreSQL)Integration with Prisma ORMExploration of Rust (not mandatory, but a valuable asset if you’re interested)Familiarity with GraphQL is a significant advantage!Are You the Right Fit? Practical Experience: At least 1 year of software development experience, preferably in a startup or product-focused environment Commitment to Renewable Energy: A genuine passion for renewable technologies and sustainability.

Mar 5, 2026

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Senior Fullstack Engineer - Join Our Innovative Team!

peec

Full-time|On-site|Berlin

About the RoleAs a Senior Fullstack Engineer at peec, you will take charge of intricate product features, overseeing everything from architecture and data modeling to crafting aesthetically pleasing and high-performance user interfaces.Key ResponsibilitiesOwn complex product features from inception to completion, ensuring a seamless user experience.Transform product concepts and designs into pixel-perfect, production-grade interfaces utilizing modern frameworks and component libraries.Collaborate with Product, Design, and Engineering teams to define project scope, shape technical direction, and deliver delightful features.Enhance and evolve our backend infrastructure along with our frontend design systems, promoting consistency, scalability, and developer efficiency.Challenge existing paradigms across the stack by enhancing developer experience, introducing innovative capabilities, and fostering a culture of innovation.

Oct 9, 2025

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Senior Fullstack Engineer - AdTech

Delivery Hero

Full-time|On-site|Berlin

Role overview As a Senior Fullstack Engineer focused on AdTech at Delivery Hero, this position centers on building and enhancing products that drive advertising technology within the company. The work involves collaborating with various teams to create and improve applications that balance user needs with business objectives. What you will do Design and develop fullstack applications for AdTech initiatives Work with colleagues across departments to deliver solutions that support both users and business stakeholders Continuously refine and optimize existing products to improve performance and outcomes Location This role is based in Berlin.

Apr 28, 2026

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Senior Software Engineer - Local Payments

PPRO

Full-time|On-site|Berlin

Join PPRO in our mission to streamline access to local payment methods, empowering businesses worldwide to thrive by offering their customers preferred payment solutions. As a trusted partner to renowned organizations like Ant Group, PayPal, and Stripe, we help our clients tap into new markets and enhance customer connectivity, driving growth and innovation in global commerce.Our diverse global team, representing over 50 nationalities across 10+ international locations, is united in our pursuit of excellence. We are committed to continuous innovation, guided by our core values: #chooseaction, #beopen, #thinkcustomer, #gofurther, and #wintogether.Role Overview:As a Senior Software Engineer at PPRO, you will play a pivotal role in shaping our products and engineering culture. You'll tackle complex technical challenges, contribute to architectural decisions, mentor fellow engineers, and collaborate closely on code development. Your insights and expertise will significantly influence our team's success and the overall company direction.

Dec 10, 2025

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Senior Product Engineer at peec | Berlin

peec

Full-time|On-site|Berlin

Join Our Team as a Senior Product EngineerAt peec, we are on a mission to create innovative and user-centric products that make a difference. As a Senior Product Engineer, you will play a crucial role in shaping the future of our products by taking ownership of complex features from conception to delivery.Your ResponsibilitiesLead the development of intricate product features, overseeing every aspect from architecture to user interface design.Convert product concepts and designs into flawless, production-ready UI using cutting-edge frontend frameworks and component libraries.Collaborate closely with Product, Design, and Engineering teams to define project scope and deliver features that exceed user expectations.Enhance our backend infrastructure and frontend design system, ensuring they are scalable, consistent, and efficient.Innovate across the technology stack, enhancing developer experience and introducing new capabilities.Qualifications5+ years of comprehensive fullstack engineering experience.In-depth knowledge of TypeScript, React, and Tailwind CSS, with a proven track record of delivering top-quality features on both the frontend and backend.Strong architectural skills and the ability to design clean, maintainable, and scalable systems.Experience in designing and implementing APIs (REST, GraphQL, or gRPC) and integrating them into polished user interfaces.Excellent communication skills and a strong sense of ownership, with the ability to work independently while aligning with team objectives.Evidence of excellence, potentially beyond work, such as a high FIDE rating.A commitment to fostering a kind, collaborative, and hardworking team environment.

Oct 9, 2025

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Senior Fullstack Engineer - Seller Center (All Genders)

ABOUT YOU GmbH

Full-time|On-site|Hamburg or Berlin

Join our dynamic team as a Senior Fullstack Engineer in the Seller Center at ABOUT YOU GmbH! In this role, you will leverage your expertise in both front-end and back-end technologies to enhance our platform and improve seller experiences. You will be a pivotal part of our product and tech departments, collaborating with cross-functional teams to deliver high-quality solutions.Your responsibilities include designing and implementing robust features, optimizing application performance, and ensuring seamless integration across various systems. We are looking for innovative thinkers who are passionate about technology and eager to contribute to our mission of transforming e-commerce.

Apr 13, 2026

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Senior Fullstack Engineer - Cloud & AI (all genders)

Forvis Mazars

Full-time|On-site|Berlin

Role overview Forvis Mazars seeks a Senior Fullstack Engineer in Berlin with a strong focus on cloud and AI technologies. This position involves designing, developing, and implementing solutions that draw on modern cloud services and artificial intelligence. What you will do Design and build fullstack applications that connect cloud and AI technologies Collaborate with colleagues to deliver digital solutions for clients Apply technical expertise to projects supporting digital transformation Enhance client experiences by creating innovative, scalable systems Requirements Experience with both frontend and backend development Solid background in cloud platforms and AI tools Enjoys collaborative work and knowledge sharing Motivated to try new approaches and push technical boundaries This role is based in Berlin. Forvis Mazars encourages applications from all genders.

Apr 22, 2026

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(Senior) Consultant* - Payments

Capco

On-site|On-site|Germany - Berlin

Who We AreAt Capco, we are a leading global consultancy dedicated to the financial services sector. We blend innovative thinking with unparalleled expertise to create solutions meticulously tailored to our clients’ unique needs.What Sets Us ApartOur 'Be Yourself At Work' culture celebrates authenticity and diversity. We encourage everyone to contribute their unique perspectives, personalities, and skills. At Capco, you have the opportunity to engage with your strengths—whether it's through initiatives to enhance our organization, participating in our Game Nights, or joining one of our numerous clubs (such as Sports Club, Music Club, etc.).Join us and turn your ideas into reality as a...(Senior) Consultant - PaymentsYour Capco BenefitsFlexible work models and hybrid working options based on project requirementsA comprehensive onboarding process along with your dedicated coach and buddyBike leasing programCapco Benefits Card with a monthly credit of €44Regular health check-ups and mental health workshopsThe PME family service offers support for all life situationsContinuous feedback and opportunities for professional development (e.g., through internal training and Udemy Business)Exciting company events and after-work gatheringsPermanent employment contractAutonomy, flat hierarchies, a hands-on approach, and swift decision-makingA dynamic, fast-growing international environment with ample opportunities to showcase your talentsOur office located right at the Opera Square in FrankfurtYour Responsibilities at CapcoYou will engage in challenging consulting projects within the payments landscape, from business analysis and technical design to testing and close implementation support.Experience project execution at the intersection of traditional system landscapes and modern architectures—utilizing both waterfall and contemporary methodologies.Maintain a strong client focus, leveraging your own experiences and those of your Capco colleagues to drive value.As the project progresses, you will take on increasing responsibility for your topics, leading to...

Feb 3, 2026

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Senior Full Stack Engineer - Node.js, TypeScript & React

smava GmbH

Full-time|On-site|Berlin

Join us at smava, a leading online credit comparison platform dedicated to making loans transparent, fair, and affordable. With a community of over 300,000 satisfied customers, we're proud to stand among Germany's foremost FinTech companies. Be part of our mission to revolutionize the consumer loan market and shape its digital future!Our engineering teams enjoy a high degree of autonomy and are responsible for their specific areas within the platform, including associated services and systems. We prioritize collaboration, ensuring clear technical contracts and common standards for seamless interactions, while fostering a culture of open dialogue and joint decision-making. This approach empowers us to execute our ambitious and exciting roadmap successfully.YOUR NEW TEAMWe are seeking a passionate Senior Software Engineer to join our Offers and Checkout team. Our mission is to empower loan customers with intuitive and transparent digital services that are trustworthy and self-serve. We aim to provide a smooth journey from loan selection to checkout, ensuring our customers feel confident and in control throughout the process. Our cross-functional team includes Frontend, Full Stack, Backend, QA, and Design roles, working in close collaboration with our Product Owner and various stakeholders.WHAT YOU WILL BE DOINGOwn and deliver complex end-to-end features across the Offers, Checkout, and Customer Area domains utilizing React and TypeScript for the frontend and Node.js (TypeScript) for the backend.Drive Automation and AI-driven UX development, leveraging your expertise to identify, test, and implement AI solutions that enhance our development speed and testing quality.Build and maintain stable, scalable services in a data-intensive, distributed AWS environment using Kubernetes, AWS Lambda, and event-driven architectures.Collaborate closely with Product Owners and UX Designers to create high-conversion customer journeys, ensuring a seamless and trustworthy self-serve experience.Uphold high engineering standards regarding code quality, performance, and security, actively participating in technical decision-making (stack, tools, architecture) within the team.Embrace the philosophy of "you build it, you run it, you own it".

Apr 13, 2026

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Senior Fullstack Software Engineer - Metrify Smart Metering

Enpal

Full-time|On-site|Berlin

Join Enpal as a Senior Fullstack Software Engineer in the innovative field of smart metering technology! We are seeking a talented and passionate engineer to help us develop cutting-edge solutions that redefine energy management and consumption. You will work with a dynamic team to create and enhance our fullstack applications, contributing to the entire development lifecycle, from conception to deployment.

Apr 2, 2026

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Senior Fullstack Software Engineer (m/f/d)

Voyfai

Full-time|On-site|Berlin

Become a part of Voyfai, an innovative Series A startup revolutionizing logistics and technology throughout Europe.Based in the vibrant city of Berlin, we are at the forefront of a network of companies operating across various European markets.This is an exceptional chance to take the reins from the very beginning, make a significant impact, and thrive in a fast-paced, dynamic setting. Whether you're refining processes, crafting strategies, or spearheading initiatives, your efforts will directly affect the success of Voyfai and the enterprises we assist. If you have a passion for building innovative solutions from the ground up and want to be part of a rapidly growing company, we are eager to hear from you.Your RoleWe are on the lookout for a talented Senior Software Engineer (m/f/d) to join us in constructing the essential infrastructure of our logistics platform. In this pivotal role, you will collaborate closely with AI engineers and product stakeholders to define system architecture, integrate with transport management systems, and develop customer-facing features that utilize large language models. Your contributions will play a vital role in shaping our engineering practices and establishing a scalable foundation for future product development over the next year.Key Responsibilities:Design and implement scalable software solutions with a focus on robust system architecture and clean coding practices.Create and enhance integrations with transport management systems and third-party logistics platforms.Partner with AI engineers to deliver customer-centric features powered by advanced language models.Enhance system reliability, maintainability, and scalability by managing technical debt and evolving the technology stack.Utilize PostgreSQL to ensure data consistency, integrity, and performance.Employ cloud platforms such as AWS or GCP to facilitate infrastructure and deployment.Contribute to DevOps and CI/CD practices to enhance release speed and operational stability.Occasionally engage with customers to translate their requirements into product and engineering solutions.What You Bring:A minimum of 5 years of professional software engineering experience, demonstrating strong backend architecture skills and proficiency across the full stack.Proficient in JavaScript or TypeScript in both backend and frontend contexts.Experience with SQL databases, particularly PostgreSQL.Familiarity with cloud platforms such as AWS or GCP.Strong understanding of DevOps and CI/CD methodologies.Excellent problem-solving skills and a proactive approach to challenges.

Feb 20, 2026

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