
Proton · London; Paris; Prague
Join Proton and build a better internet where privacy is the default Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundame...
Join Proton and build a better internet where privacy is the default
Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve
built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and
Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some
situations, Proton has literally helped save lives!
We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 500+ team members across
50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize
impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you
can truly be proud of. Check our open-source projects here!
Purpose of the role
As a Backend Engineer in Marketing Technology you will be responsible for building our key components of our marketing technology
stack. You will drive software design and implementation likewise while helping a newly formed cross-functional team. You will
interact with key stakeholders in the Business Units, Software Development, Marketing, Sales and more to understand requirements
and use cases while keeping the bigger picture in mind.
If you’re a self starter and results-driven backend engineer, and you thrive in a fast-paced environment, this is a great
opportunity to play a pivotal role in a fast-growing company. You will have a concrete impact on the future of the business as a
whole.
What you will do
technical questions about the stack
Job requirements
influence at all levels of the organisation
What We Offer
investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more
about our impact here)
life, including many of the world’s top academic institutions and organizations, such as MIT, Harvard, Stanford, Caltech,
Cambridge, and ETH.
accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.
leave, and wellness support so you can bring your best self to work every day
we're building. When Proton wins, you win.
With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face with
people who genuinely care about what they're building
for you.
clock says you started.
Our Commitment to Diversity and Inclusion
At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are
committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual
orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities,
promote open dialogue, and support continuous learning to ensure every voice is heard and respected.
If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.
Candidate Privacy Notice
When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our),
your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate
your suitability for the posted position. We also retain this information for consideration for future roles that you may apply
for or that we believe may align with your background and skills.
If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you
have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please
contact our privacy team at careers@proton.ch.
Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any
placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.
To learn more about our privacy policy, please visit our privacy policy page.
We're putting together a talented team to build the #1 training platform for Runners We help everyday runners become outstanding by building an incredible app providing world-class training, coaching and community for everyone, whether you're improving your 5k time or training for your first marathon. We’re growing extremely fast! In November 2023 we closed a $6.5M funding round led by JamJar with participation from Eka Ventures, Venrex and Creator Ventures. In 2024, we were selected by Apple as one of three global finalists for the iPhone app of the year, reflecting the innovation and impact of what we’ve built & in 2025 we were acquired by Strava! Our ambition is huge: to become the go-to global leading training platform for millions of runners everywhere. We’re growing with purpose and looking for people who want to build something meaningful with lasting impact. With the recent acquisition by Strava accelerating our journey, now is a really magical time to join. 🚀 THE TEAM YOU’LL JOIN We’re looking for a full stack engineer to join our Growth team, with a strong focus on marketing technology. You’ll sit at the intersection of product, data and marketing – building and maintaining the systems that power our acquisition, activation and retention efforts across channels. Although Marketing Technology is a core part of this role, you’ll also spend a significant portion of your time working across full‑stack initiatives in our Growth Product Squad – building features, launching experiments, and iterating based on results. You’ll join our cross-functional Growth squad, working closely with product, marketing and data. The team is responsible for: * Improving how new users discover, try and subscribe to Runna. * Running experiments across the funnel, from ad click through to in‑app activation and ongoing engagement. * Owning the core tools and integrations that power our marketing and lifecycle communications. HOW WE WORK * Cross‑functional, collaborative teams with shared goals. * Iterative development, continuous deployment and a strong focus on testing and observability. * High autonomy, high ownership – you’ll have real responsibility for growth outcomes and the systems that support them. You’ll also collaborate with the wider engineering org to ensure our growth systems are robust, observable and align with our overall architecture and standards. WHAT YOU’LL BE DOING * Own implementation and maintenance of ad tracking SDKs and MMPs (for example TikTok, Meta, Google, AppsFlyer), including event mapping and monitoring for signal loss. * Build and maintain tracking and tag manager setups across web and app so our data is reliable, privacy‑respectful and useful for models and reporting. * Design, build, test and ship full stack features that support growth (for example landing pages, onboarding flows, referral and promo experiences). * Integrate and maintain CRM and lifecycle tooling (for example Iterable or similar), including catalogues, data feeds, deeplinks and email / in‑app templates. * Build internal tools, automations and scripts (for example in Python or Node) that connect systems, improve workflows and power pLTV, dashboards and alerting. * Collaborate closely with Growth, Marketing and Data to scope experiments and quickly ship A/B tests and campaigns that move key metrics. WHAT YOU’LL BRING TO THE TEAM: * Solid experience as a full stack engineer (ideally 3+ years), comfortable working across frontend and backend. * Strong TypeScript/JavaScript skills and experience with modern frontend frameworks (for example React / React Native). * Hands‑on experience integrating and maintaining marketing technology such as: * Analytics and product analytics tools. * Mobile / web attribution. * Tag managers and event tracking. * CRM or lifecycle platforms (email, push, in‑app messaging). * Comfort working closely with non‑engineering partners (marketing, product, data) and translating business goals into technical solutions. * A bias towards experimentation and iteration – you care about impact and learning fast. * Strong ownership mindset: you’re happy to take a problem from idea to shipped, monitored solution. * Good understanding of event tracking, data quality and debugging issues across multiple platforms and tools. BONUS POINTS IF YOU HAVE: * Experience with mobile growth and attribution (for example RevenueCat, app store / play store tooling, mobile attribution providers). * Previous experience in a product‑led or consumer subscription business. * Experience with experimentation platforms and A/B testing. * Familiarity with AWS or another major cloud provider and modern CI/CD practices. * Experience working in or closely with a Growth / Marketing team. OUR TECH STACK Below you can find a small reflection of our current tech stack: FRONTEND: * React Native (iOS and Android) * Typescript * GraphQL (Apollo Client) * Fastlane * SwiftUI (Apple Watch) * Maestro E2E tests BACKEND: * Serverless (AWS) * Lambdas (NodeJS & Python) * AWS AppSync * DynamoDB, S3, SQS, SNS, EventBridge, SageMaker * Snowflake ALL THE OTHER GOOD STUFF: * Sentry * GitHub Actions * Intercom, Mixpanel * RevenueCat * App Store Connect / Play Store * Google Tag Manager SALARY AND BENEFITS We’re offering a salary of £70,000-£78,000 per year, depending on experience, plus participation in Strava's long-term incentive (stock) programs. Overview of our benefits is below: We’re also committed to continually evolving our benefits to support you as we grow. Here is a brief overview what we currently offer in the UK 🇬🇧 1. 🏢 Flexible working – we typically spend 3 days a week together in our Vauxhall office 2. 🏝️ 25 days holiday, plus bank holidays 3. 📱Free Runna & Strava subscriptions for you and 3 of your friends (get ready to be your friends fave person or save them for holiday presents!) 4. 🧘 Headspace membership 5. 💸 Money every year to spend on gear, events and the gym! 6. 🏥 Private health insurance with Bupa and workplace pension scheme 7. 💖Modern Health is a mental wellness platform and app that combines technology with professional support to improve mental well-being and reduce stress 8. 🥕Carrot fertility support - this benefits provider can provide inclusive fertility, hormonal health, and family-forming benefits to our global employee population and takes the burden off what we know can be a stressful process. Please see more info on our amazing benefits here: Benefits at Runna OUR INTERVIEW PROCESS: Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages: 1. Screening call with Talent team (30 minute video call) 2. Getting to Know You + Live Coding (45-minute video call, first 25 mins will be an introductory chat followed by two live coding exercises from https://leetcode.com/) 3. Take home technical task (max 1-2 hours to complete, or if you have something interesting you recently built and would like to showcase then that's perfectly OK) 4. 1.5-hour technical interview (the first half of the call will be used to discuss the take-home technical task from the previous stage and the second half will consist of system design and some general architecture/tech questions) 5. Meet the team (in-person chat with the wider team) Please let us know if there’s anything we can do to better accommodate you throughout the interview process - this can be from scheduling interviews around childcare commitments to accessibility requirements. We want you to show your best self in the process, so please speak to your Talent Partner
ABOUT WOLT At Wolt, we create technology that brings joy, simplicity and earnings to the neighborhoods of the world. In 2014 we started with delivery of restaurant food. Now we’re building the delivery of (almost) everything and you’ll find us in over 500 cities in 30 countries around the world. In 2022 we joined forces with DoorDash and together we keep on dreaming big and expanding across the globe. Working at Wolt isn’t always easy, but it’s definitely exciting. Here you’ll learn more, build more, and ship more than in most other companies. You’ll be challenged a lot, but also have a lot of fun on the way. So, if you’re a self-starter with drive and entrepreneurial spirit, this could be the ride of your life. ABOUT THE TEAM We, the Marketing Tech team, are looking for a passionate and driven Golang/Python Backend Software Engineer. We are a product-focused team that emphasizes enabling the scaling and efficiency of campaigns and marketing efforts both inside and outside of Wolt. The MarTech team is currently building internal services around marketing and consent use-cases to allow our marketing stakeholders to drive marketing campaigns in and out of the app, and ensure we provide and maintain a compliant experience throughout the whole process. We empower marketing with the tools to fully set up and run their campaigns independently so as not to be blocked by product or engineering. In our team, you can expect to face many different types of projects across the realm of acquiring users and keeping them engaged. You’ll work on both maintaining and expanding existing services, as well as planning and designing new ones. Our project types vary a lot, from services used in the core Wolt flow, services for automation or to enable our Marketing teams, ETL jobs, as well as streaming processing workers. Some examples of projects include our in-house built: * Audience management tool in Golang * Marketing attribution powered by Spark * Consents management platform in Golang * Bid & budget automation platform in Python * Campaign generation tool in Golang * A whole host of ETL jobs written in Python The key business need this role is to fill is the development of a centralized consent platform that allows teams to easily create and deploy compliant consent-gathering experiences. Since the team focuses on providing platforms and tools to enable marketing at Wolt, you can expect cross-team collaboration within Wolt. You’ll also regularly be working with marketing or analytics stakeholders and product leads to see through bringing projects from idea to production. In addition, you’ll collaborate cross-functionally with teams from DoorDash, working on building services and aligning roadmaps across several teams. If you didn't know it yet, we have a strong Python community at Wolt: around 100 of our engineers are actively using Python and sharing knowledge related to its rich ecosystem. Wolt Tech Talks Youtube channel has recordings from our Python meetups and interesting articles in our engineering blog 📍This role can be based in one of our tech hubs in Helsinki and Berlin. Read more about our hybrid and remote setup here. OUR HUMBLE EXPECTATIONS: 👉 You might be the one if you are an engineer with experience in designing and building top-class software and APIs using modern Golang or Python. We work primarily with grpc, FastAPI, Echo, PostgreSQL, and Spark, and value familiarity with Postgres, Kafka, Redis, as well as monitoring, alerting, and deploying services in production. An understanding of what it takes to build and operate scalable software services is key. Our backend runs on Kubernetes in AWS, so experience with similar cloud infrastructure is a strong plus. We also appreciate a willingness to take ownership and deliver projects end-to-end. 👉 You know what it takes to achieve ambitious goals together. We expect you to be a good communicator, willing to collaborate with people outside of your own team, be a product-oriented and proactive problem solver, willing to bring up issues in a constructive manner to the team and the Wolt Product team at large. 👉 Understanding of marketing principles and workflows will also be a plus, but don't let it get into your way if these are newer things for you, we are sure you'll get the grasp of them! OUR COMMITMENT TO DIVERSITY AND INCLUSION We’re committed to growing and empowering a more inclusive community within our company, industry, and cities. That’s why we hire and cultivate diverse teams of people from all backgrounds, experiences, and perspectives. We believe that true innovation happens when everyone has room at the table and the tools, resources, and opportunity to excel.
🏆 🎉 🏆 WE'RE PROUD TO ANNOUNCE WE'VE WON ADVICE FIRM OF THE YEAR AT THE MONEY MARKETING AWARDS 🏆 🎉 🏆 We’re looking for a Backend Engineer with solid Golang and database skills to help us build the scalable operations, technology, and processes needed to transform 5 million lives by making high-quality financial support affordable and accessible to employees everywhere. This is an ideal opportunity for a motivated self-starter to accelerate their career, taking a broad and varied role within a rapidly growing company. We pride ourselves on building an inclusive working environment where diversity is celebrated. ABOUT OCTOPUS MONEY 🐙 We’re on a mission to transform millions of lives by building financial resilience and wealth for everyone 🐙 Money shapes every part of life. Yet most people never get the support they need: * Half of Brits reach retirement age without enough to live the life they want * Financial stress is a leading cause of poor mental health * Only 8% of people have access to 1-to-1 financial advice There’s no shortage of information. What people actually need is clarity, guidance and a plan that makes sense for them. That’s where we come in. Octopus Money brings together financial planning, investment expertise and smart technology so people can understand their options and take action with confidence. We help people build a clear plan for their savings, investments and pensions and make investing simple with managed portfolios built by experts. We also support employers who want their teams to feel more secure and in control. Some people need regulated advice. Others need coaching. Many need both at different points in life. Our service adapts to what each person needs. We believe everyone deserves money support that works for real life. THE ROLE AND OPPORTUNITY Our development team is composed of multiple squads, each taking ownership of a vertical within our product. Each squad is composed of a product manager, frontend and backend engineers. Our front-end stack is built on React with Typescript and leveraging microfrontend deployments. Our backend stack is powered by Golang, providing REST and GraphQL APIs. We are looking for a product minded engineer who wants to deliver meaningful features to our end users. You’ll be a part of a multidisciplinary product engineering team and can collaborate closely with other backend engineers, frontend engineers, product, design and devops. As the company continues to scale, there will be opportunities to be involved in the technical architecture and strategy for our products and tech stack. You will be responsible for: * Writing, testing and deploying great software * Collaborating with the tech leads and other Engineers on deciding future technologies and processes * Working with modern and new technologies and frameworks * Working in an Agile team * Building relationships with product and devops * Conducting code reviews and pairing with other colleagues We value people who Make every conversation matter You care about how you make people feel. You communicate clearly, listen well and build trust with customers and colleagues. You want every interaction to move things forward. Move with urgency and focus You like getting stuck in. You care about making progress, not perfection. You stay focused on what matters, learn quickly and find smart ways to keep things moving. Own it You take responsibility for your work and the outcomes it creates. You’re comfortable solving problems, making decisions and tackling challenges head on. You hold yourself to a high standard and want to make a real impact. About you Problem solver at heart with an analytical mindset You should be someone who gets excited by complex problems and can find creative ways to solve them no matter what your level of knowledge and experience with the subject matter. You should be able to digest complexity and develop a plan to move forward, without losing sight of the important details. Excellent technical knowledge As an Engineer, you should be an expert in at least one aspect of software development and skilled in other areas. You have learned that delivering great software takes a team and has plenty of pitfalls to avoid. Knowledge and experience required * 3+ years’ expertise in software development using strongly-typed languages (e.g. Go, Java, or similar), with at least 1+ year of commercial experience using Golang. * Product-engineering experience (e.g. solving customer problems, delivering on business goals, working with product managers and frontend teams) with Golang. * Strong experience writing easily-testable and thoroughly-tested code * Data modelling and DB design experience with SQL or NoSQL DBs * Experience delivering cloud-based REST or GraphQL API solutions * Empathetic, proactive and constructive communication skills, with the ability to influence and collaborate effectively across teams * Able to work three days a week onsite at our London office in 33 Holborn, EC1N 2HT Nice to have (but not essential) * Microservice and integrating distributed systems with messaging and event-driven architectures * AWS Architecture experience * Experience using Terraform, or other infrastructure as code tooling * Educated to Bachelor's or Master's degree level in Computer Science, Engineering, or a related field In return we offer a base salary of £65,000 to £80,000 DOE + benefits We want people to grow here, to feel supported and to feel proud of the impact they make! You’ll get: * 18 days a year working from anywhere (for non regulated roles) * Bonus for non-commission based roles * Company pension * Private medical insurance * Enhanced parental leave * Birthday day off * A supportive team who care about what they do * The chance to help people improve their lives Please note, as a regulated business we are required to run background checks for all employees which covers adverse financial and unspent convictions. These will only take place upon a successful job offer. About Octopus Group We’re part of the Octopus Group: a privately-owned business that’s been doing things differently for 25 years. Octopus sets out to build businesses that will outlive us and create a better world for future generations, including brands such as Octopus Energy, Octopus Investments and Octopus Legacy. -- We believe in equal financial education for everybody, no matter their background. We pride ourselves on building an inclusive working environment where diversity is celebrated. We do not and never will discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you require support completing your application please contact applications@octopusmoney.com