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Backend Engineer

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Backend Engineer

Senior Full-Stack Engineer - SuperApp

SumUp

Berlinfulltimesenior

Apply on the employer's site

Role description

The SuperApp squad owns parts of the merchant experience across Web, Android, iOS and the flows that millions of small business owners use every day to run and grow their businesses. As our dedicated full stack web engineer within the squad, you'll own this space entirely, shaping technical direction, driving feature parity for SumUp's web experience. If you want real ownership, a broad scope, and work that lands directly in the hands of millions of merchants, this is the role.

What you'll do:

  • Own and develop core web dashboard features including the first-time user experience, home screen widgets, quick actions, tools section, and communications centre
  • Build and maintain the backend services that power these flows, ensuring a seamless and consistent experience across web and mobile
  • Work closely with iOS and Android engineers, product managers, and designers to shape cross-platform solutions and contribute to technical direction
  • Lead the design and refinement of technical solutions — writing clear documentation, making architectural decisions, and communicating progress to stakeholders
  • Be an active contributor to the web chapter and the broader engineering community at SumUp

What we're looking for:

  • Strong, proven experience with React.js and TypeScript, building scalable, maintainable applications in a production environment.
  • Comfortable working across the stack, with experience building backend services or REST APIs, Go is a plus, but Node.js or similar is equally welcome.
  • Ability to navigate and refactor complex codebases with a focus on clean, durable code and solid system design.
  • Experience working in cross-functional teams alongside product managers and designers, with a strong sense of ownership and comfort with ambiguity.
  • A product mindset, thinking about the merchant experience, not just the code, and connecting technical decisions to real business outcomes.

Why you should join SumUp:

  • 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup
  • 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
  • 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success
  • 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education
  • 💶 A corporate pension scheme where we match up to 20% of your contributions
  • 🏖️ Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days
  • 🏋️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches
  • 🌴 Break4me: 1-month sabbatical after 3 years of service
  • 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp
Be empowered to do more that matters.

At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.

Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.

SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website, and follow our journey on LinkedIn, Instagram, and TikTok.

Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

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A resume for this role — and a ticket to the draw

We take the posting apart down to the real requirements and rewrite your resume against it — by asking, not inventing: no line appears without your confirmation. Sign in to get it first, and to enter the draw.

  • A resume for this exact role, not a universal one
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  • All in your account — open it from any device

On the wheel

A discount on mentoring

Winners are drawn at random among entries with a confirmed email. The date and the full rules are on the draw page.

Draw rules

Backend Engineer

Erfahrener Backend Entwickler (m/w/d)

OROS Energy

Constancefulltime

Apply on the employer's site

Role description

Batteriespeicher sind das Herzstück der Energiewende. Wir bei OROS ENERGY sorgen dafür, dass sie für Gewerbe- und Industriekunden nicht nur funktionieren, sondern intelligent gesteuert, überwacht und vermarktet werden. Unser Ziel: Ein reibungsloses Energiemanagement, das unseren Kunden echten wirtschaftlichen Mehrwert bringt.

Hinter uns steht die RCT-Gruppe: Jahrzehntelange Erfahrung in erneuerbaren Energien, ein weltweites Expertennetzwerk und die Substanz eines etablierten Unternehmens. Das gibt uns etwas, das die meisten Startups nicht haben: einen echten Vorsprung beim Marktzugang und das Vertrauen unserer Kunden vom ersten Tag an.

Vor uns liegt der Aufbau einer Softwareplattform, die den Markt verändern kann. Unser Software-Team wächst gerade und wir suchen Menschen, die nicht nur Code schreiben, sondern mitdenken, mitgestalten und Verantwortung übernehmen wollen. Menschen, die dabei sein wollen, bevor alles steht.

Aufgaben

Du betreibst das technische Rückgrat von OROS ENERGY.

Konkret bedeutet das: Du übernimmst Verantwortung über die weitere Integration unseres eigenen Energiemanagementsystems (EMS) in unser Backend. Von der Anbindung an unser ERP/CRM Odoo, über externe Dienstleister wie Battery-Analytics-Plattformen und Flexibilitätsvermarkter bis hin zu einem skalierbaren, zukunftsfähigen Gesamtsystem, das mit unseren Anforderungen wächst.

Datenschutz und IT-Security sind dabei keine Nachgedanken, sondern von Anfang an Teil der Architektur. Wir wollen in diesem Bereich Maßstäbe setzen, nicht nur Mindestanforderungen erfüllen.

Da wir auch das Frontend inhouse entwickeln, bringst Du Deine Erfahrung in direktem Austausch mit ein und gestaltest so nicht nur die technische Infrastruktur, sondern das gesamte Produkt mit.

TL;DR: Du kommst nicht, um Tickets abzuarbeiten. Du kommst, um etwas aufzubauen.

Deine Aufgaben im Detail

  • Übernahme, Absicherung und Skalierung unserer Backend-Infrastruktur auf einem privaten deutschen Cloud-Anbieter (Bare Metal)

  • Weiterentwicklung der Integration unseres Technologie-Stacks aus europäischen und offenen Lösungen, insbesondere OpenEMS (EMS), Odoo (ERP/CRM) und Keycloak (SSO/Authentifizierung)

  • Automatisierung von Deployments, Software-Updates und Konfiguration unserer Batteriespeicher im Feld

  • Bereitstellung und Pflege von Schnittstellen zu Drittanbietern, die über unser Backend angebunden werden

  • Ausbau und Professionalisierung unseres Monitoring- und Alerting-Systems zur Sicherstellung der Betriebsstabilität und schnellen Incident Response

  • Implementierung und Weiterentwicklung von Datenschutz- und IT-Security-Maßnahmen mit dem Anspruch, OROS Energy zum Technologievorreiter in der Branche zu machen

  • Performance-Optimierung unserer Datenbanken und Backend-Dienste für eine wachsende Zahl angebundener Anlagen

  • Anleitung und Betreuung von Trainees

Qualifikation

  • Mehrjährige Erfahrung als Backend-Entwickler mit nachweisbarem Track Record im Betrieb und der Skalierung produktiver Systeme

  • Fundierte Kenntnisse in Linux-Server-/Container- Administration und CI/CD-Pipelines

  • Starkes Bewusstsein für IT-Security und Datenschutz.

Nicht nur als Anforderung, sondern als Qualitätsanspruch

  • Erfahrung mit Java (eventuell sogar OSGi) oder Umgang mit JSON-RPC wären besonders wertvoll. Ein sicherer Umgang mit PostgreSQL, REST-APIs und Cloud-Infrastruktur wird vorausgesetzt

  • Unternehmerisches Denken und Hands-on-Mentalität

  • Sehr gute Deutsch- und Englischkenntnisse

Nice-to-Have

  • Erfahrung mit OpenEMS, Odoo oder Keycloak

  • Berührungspunkte mit Frontend-Entwicklung, insbesondere Blazor/WebAssembly

  • Hintergrund in der Energiewirtschaft oder IoT

Benefits

  • Schlüsselrolle mit direktem Einfluss auf Unternehmenswachstum

  • Gestaltungsspielraum und Verantwortungsübernahme in einem für unser Unternehmen kritischen Bereich

  • Dynamisches, ambitioniertes Team

  • Attraktive Vergütung inklusive Beteiligungsmöglichkeit

  • Stark wachsendes Unternehmen in einem Schlüsselmarkt für unsere Zukunft

  • Die Möglichkeit, aktiv an der Energiewende mitzuwirken

  • Perks: HanseFit-Mitgliedschaft für Deine Gesundheit und Fitness

Schließe dich OROS ENERGY an und gestalte die Energiewende mit! Entwickle innovative Speicherlösungen und sichere Datenhoheit als erfahrener Backend Entwickler (m/w/d). Wir freuen uns auf deine Bewerbung.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Senior Backend Engineer (m/f/d) – Kotlin/Spring Boot/AWS

Axel Springer Tech GmbH

Berlinfulltimesenior

Apply on the employer's site

Role description

Axel Springer is an international media and technology company with a portfolio that includes leading news brands such as BILD and WELT in Germany, ONET in Poland, and globally recognized brands like POLITICO and Business Insider. Our mission is to empower free decisions by providing trusted information.

We have completed the transformed from a traditional print publisher into a digital-first company and we continue to to push the pace of product and engineering innovation.

Our strategy is clear. We aim to become the leading AI enabled publisher in the democratic world. Artificial intelligence is not a side initiative for us. It is a core capability embedded across our products and workflows.

We believe that strong journalism is a pillar of democratic societies. If this mission resonates with you, you will find a clear sense of purpose here. Your engineering work helps millions of people access reliable information every day.

You’ll join a fast-moving, cross-functional mobile native team of Android, iOS, and backend developers — the creative force behind Germany’s leading news apps: BILD News, Sport BILD, WELT News, reaching millions of users every month. Are you open to trying new things? Are you confident, driven and clever? Then apply for a role now with Axel Springer Tech

We believe in the future of journalism as a business model and invest in forward-looking technologies.

Our five essentials are the values that unite us and guide us in our commitment to freedom.

How you'll make an impact

  • take end-to-end ownership of our backend services to deliver scalable, reliable systems powering our mobile experience
  • architect and implement robust backend solutions with Kotlin, Spring Boot, AWS, and Kotlin-based AWS Lambdas ensuring long-term performance and maintainability
  • ensure reliability and operability of your backend services by optimizing monitoring, logging, metrics, alarming, and overall service health
  • collaborate with our MaPS platform team to deploy and operate workloads on Kubernetes using modern, developer-friendly infrastructure
  • develop and document clean, efficient APIs for seamless integration with other teams and products across our ecosystem
  • act as a mentor and sparring partner for Android and cross-functional team members on backend topics to boost collaboration and knowledge sharing
  • broaden your skill set by exploring Android or iOS development and gaining insight into the full product vertical
  • play a key role in shaping technical vision, aligning architecture decisions, and continuously improving processes for greater product impact

What you'll need

  • at least five years of hands-on experience as a backend or software engineer, ideally in JVM-based backend systems
  • fluent in Kotlin and experienced with Spring Boot, having built and operated production-grade backend services
  • solid track record working with AWS cloud technologies (including Lambda and container-based workloads), plus familiarity with cloud-native patterns like IAM, S3, and messaging services
  • interested in Kubernetes, understanding concepts like deployments, observability, and containerized workloads
  • strong commitment to code quality, maintainable architectures, testing and long-term system ownership
  • enthusiasm for monitoring, transparency, and building systems that are easy to operate
  • proven strength in mentoring colleagues, building cross-team relationships, and actively promoting knowledge sharing in diverse environments
  • strong communicator who translates complex technical topics for product managers, designers, and fellow engineers

What we offer

  • your personal growth is important to us: we offer trainings and learning lunches, tech conferences, a budget for workshops and much more to expand your knowledge and your skills
  • Employee offers that suit you and your life situation: Whether it's a discounted public transport ticket or JobRad leasing, a bicycle garage (incl. regular bicycle service), childcare facility or our modern in-house kindergarten
  • 30 days vacation plus 10 days work from abroad
  • our free food offer: we offer free lunch in our canteens
  • we offer guidance on the administrative side of relocation and visa processes through our relocation agency
  • collaboration thrives on direct exchange - we rely on 80% office presence and 20% mobile working
  • from now a permanent full- or part-time position in a modern office in the heart of Berlin: http://www.axelspringer\-neubau.de/

Questions and answers about the application process

The most frequently asked questions and their answers can be found on our FAQ page: career.axelspringer.com/en/faq

Diversity is an essential part of our corporate culture! We are looking forward to receiving all applications regardless of gender, nationality, ethnic and social origin, religion, ideology, disability, age, sexual orientation and identity.

You can find information about the representation for the severely disabled at Axel Springer here: https://career.axelspringer.com/en/rsde

Contact person for this position (reference number REF2655E) is Daniel Müller-Secorsky

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Software Engineer II (C++)

Cadence

Feldkirchenfulltimelead

Apply on the employer's site

Role description

At Cadence, we hire and develop leaders and innovators who want to make an impact on the world of technology.
Cadence is a pivotal leader in electronic design, building upon more than 30 years of computational software expertise. The company applies its underlying Intelligent System Design strategy to deliver software, hardware and IP that turn design concepts into reality.

Cadence customers are the world’s most innovative companies, delivering extraordinary electronic products from chips to boards to systems for the most dynamic market applications including consumer, hyperscale computing, 5G communications, automotive, aerospace industrial and health.

At Cadence, we hire and develop leaders and innovators who want to make an impact on the world of technology.
Job Title:
Software Engineer II

Location:
Munich, Germany or Cambridge, UK

Reports to:
Sr Software Engineering Group Director

Job Overview
As a Software Engineer II on the Innovus and Genus database team within Cadence’s Digital Design Implementation (DDI) business unit, you will design and build the database infrastructure that underpins some of the world’s most advanced chip-design tools. Your work will directly shape the performance, scalability, and reliability of EDA software used by leading semiconductor companies globally - enabling them to bring next-generation integrated circuits to market faster and with greater confidence.

This is an opportunity to work on technically challenging, high-impact problems at the heart of modern electronic design.

Job Responsibilities

  • Design, develop, and optimise EDA database infrastructure software, including data-model enhancements, API definitions, and class implementations.
  • Investigate and resolve customer-reported defects, delivering robust fixes and clear root-cause analysis within agreed timelines.
  • Collaborate with application engineering teams to profile, benchmark, and improve database API performance and code quality.
  • Reduce database memory footprint to support very large-scale IC designs, enabling customers to tackle increasingly complex chips.
  • Contribute to architectural discussions and technical design reviews, proposing solutions that balance performance, maintainability, and long-term scalability.
  • Write clean, well-tested code and accompanying documentation that meets Cadence’s engineering standards.
  • Participate actively in agile ceremonies - sprint planning, stand-ups, and retrospectives - as a constructive team contributor.
  • Stay current with relevant developments in EDA, database architecture, and AI-assisted development tooling, and share insights with the broader team.

Job Qualifications

  • Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or a related field - or equivalent professional experience.
  • Min 2 years of professional software development experience in a relevant engineering environment.
  • Strong proficiency in C++, including familiarity with modern C++ standards and best practices.
  • Understanding of IC design data models, database architecture, and efficient data-access algorithms.
  • Experience working in UNIX and/or Linux development environments.
  • Excellent software engineering fundamentals: clean code practices, debugging, testing, and performance analysis.

Skills
Additional Skills/Preferences:

  • Experience with Tcl scripting in an EDA or automation context.
  • Familiarity with Verilog Hardware Description Language.
  • Knowledge of the IEEE 1801 Power Format (UPF) standard.
  • Practical experience using AI-assisted coding tools (e.g., GitHub Copilot, Claude Code, or similar) to accelerate and improve development workflows.

Additional Information
You will join a globally distributed team with colleagues across Europe, the United States, and Asia, collaborating across time zones in an inclusive, high-trust environment. The role supports hybrid working at either our Munich or Cambridge offices. Core tools include C++, Tcl, Linux, and internal EDA toolchains. You will work closely with application engineering teams and, where relevant, engage with customer-facing technical colleagues.

Check What We Can Offer You

  • Competitive salary
  • 30 days holiday per year
  • Group Pension Plan
  • JobRad
  • EGYM Wellpass
  • Lunch vouchers
  • 5 days paid time to volunteer to give back to our communities
  • Employee Stock Purchase Plan
  • The opportunity to work for a Great Place to Work© & Fortune 100 organization

Cadence is committed to equal employment opportunity and employment equity throughout all levels of the organization. We strive to attract a qualified and diverse candidate pool and encourage diversity and inclusion in the workplace.

We’re doing work that matters. Help us solve what others can’t.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Assistent*in des Vorstands Zeitbild Stiftung München

ZEITBILD GMBH

Munichfulltime

Apply on the employer's site

Role description

Die Zeitbild Stiftung ist an den Standorten Berlin und München fũr aktuelle Themen aus Politik, Wirtschaft, Umwelt, Technik und Gesundheit tätig.

Zu unseren Auftraggebern gehören unter anderem die Bundesregierung, Verbände und führende Unternehmen.

Weitere Informationen finden Sie auf unserer Webseite.

Aufgaben

Ihre Aufgaben:

Zum nächstmöglichen Zeitpunkt suchen wir für den Vorstand eine engagierte Būrokraft fűr administrative Aufgaben, den Zahlungsverkehr zusammen mit unserem Steuerbűro und die Unterstűtzung bei der Projektarbeit ( Halbtags oder Ganztags ).

Qualifikation

Ihr Profil:

  • Hochschulabschluss oder abgeschlossene Berufsausbildung

Benefits

Wir bieten:

  • Arbeitsvertrag in Teil- oder Vollzeit

  • Arbeitsplatz im Zentrum von München

Wir bitten um Ihre aussagekräftige Bewerbung mit kurzem Motivationsschreiben und tabellarischem Lebenslauf.

Wir freuen uns auf die Bewerbung!

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

754 more openings in this category and country

Senior Full-Stack Engineer - SuperAppSumUp · Germany

Apply on the employer's site