Mercive

Junior Full-stack Developer at Mercive Are you early in your career as a developer and eager to take ownership of what you build? Do you learn fast, and are tools like Claude Code or Cursor already a natural part of how you work? Then you might be the person we're looking for at our office in the center of Copenhagen. Mercive is a fast-growing Shopify e-commerce agency based in Copenhagen. We're the right match if you want to join a team that pushes boundaries and solves real business problems through design, technology, and strategy. We believe AI is fundamentally changing how software gets built, and we're putting it at the core of how we work, not as a gimmick, but as a genuine multiplier for quality, speed, and what's even possible to deliver. We're looking for builders with an entrepreneurial mindset: people who take initiative, own outcomes, and hold themselves accountable without waiting to be told. The Role You'll work on e-commerce projects where AI is a core part of how we build, whether that's AI-assisted coding to move faster, building AI-powered features into client projects, or automating away repetitive work. We expect you to already work actively with tools like Claude Code, Cursor or similar, whether in a job, in your studies or on your own projects. Here you'll learn to use them well on real client work, together with experienced developers. Shopify is our main focus, and you'll contribute to solutions across the Shopify ecosystem, such as: Loyalty programs and subscription programs Custom apps for brand and product launches Automations and integrations with the other systems our clients rely on Internal optimization tools for clients and for our own team Speed and performance optimization of webshops Platform migrations to Shopify and new storefronts The tech stack varies by project: native Shopify work in Liquid, HTML, and CSS, headless builds in Remix.js / Next.js, and backend services and APIs in Node.js on Google Cloud. You'll work on these as part of larger projects, with support from senior developers along the way. This is a fast-paced environment where you'll learn a lot, and where the people who take ownership and run with things go furthest. Responsibilities Build features, storefronts and improvements on Shopify projects, both in native Shopify and in headless builds with Remix.js / Next.js Use AI-assisted development tools like Claude Code and Cursor as part of your daily workflow, and review and understand the code they produce Contribute to AI-powered features in client projects and help automate repetitive work Work on backend services, APIs and Shopify apps with guidance from senior developers Write code that meets our internal standards for style, maintainability, security, and best practices Work closely with the project management team and other developers to plan and deliver tasks Ask questions, take feedback, and grow your skills across both frontend and backend Qualifications An entrepreneurial mindset: you take initiative, own your tasks, and hold yourself accountable Hands-on experience working actively with AI-assisted development tools such as Claude Code, Cursor or similar, from work, studies or your own projects Up to 2 years of professional experience, or a relevant education and projects that show what you can build Experience with JavaScript and a modern framework such as React, Next.js or Remix.js A solid understanding of semantic HTML, CSS, and core JavaScript concepts Basic knowledge of Node.js and building APIs Experience using Git Interest in e-commerce, and experience with Shopify is a plus Positive, solution-oriented mindset, with strong organizational skills Benefits Daily lunch at Restaurant Lalala Coffee, soda & snacks in the office Friday bars & fun events Office located in central Copenhagen If you can see yourself being a part of Mercive, please send us your CV and a description of why you are interested in this role. Your application must include specific examples of what you have built, with links where possible. Applications without them won't be considered. You need to be located close to Copenhagen to be considered for this job.

Are you the kind of person who sees ROAS slip on a Shopping campaign and takes ownership of finding out why, from product feed to bid strategy to margin? Do you want to shape how paid media is done across an entire agency, and do you treat AI as a serious multiplier for what you can deliver? Then you might be the person we're looking for at our office in the center of Copenhagen. Mercive is a fast-growing Shopify e-commerce agency based in Copenhagen. We're the right match if you want to join a team that pushes boundaries and solves real business problems through design, technology, and strategy. We believe AI is fundamentally changing how digital work gets done, and we put it at the core of how we work: a genuine multiplier for quality, speed, and what's possible to deliver. We're looking for specialists with an entrepreneurial mindset: people who take initiative, own outcomes, and hold themselves accountable without waiting to be told. The Role You'll take responsibility for our PPC practice and set the standard for how paid media is run at Mercive. That covers the retainer clients we grow month over month, and new storefronts where campaigns, feed, and tracking have to be right from launch day. This is e-commerce PPC, not lead generation. Our clients sell products, so you'll steer on revenue, contribution margin, and new customers rather than cost per lead. Most of the work sits in Google Shopping and Performance Max, backed by Search and Demand Gen, and the product feed matters as much as the campaign structure. AI runs through all of it. The ad platforms now automate bidding, targeting, and much of the creative, so the edge has moved to what you feed them: product data, profit signals, first-party data, and clean measurement. We want someone who works with that automation, and who questions it when the numbers don't add up. Claude Code is a core tool in the role. You'll use it to work directly with the Google Ads API, Merchant Center, and Shopify data: mining search terms at scale, enriching product feeds, building pacing and anomaly alerts, and automating reporting. You don't need to be a developer, but you should be comfortable directing an AI agent in a terminal and keen to build your own tools rather than wait for someone else to. Shopify is our main focus, and much of your work will center on premium DTC and fashion brands. That means large catalogs with variants and seasonal drops, multi-market setups with Shopify Markets, currencies, and languages, and peak periods like Black Friday where planning decides the result. You'll work closely with SEO, UX, developers, and project management so paid, organic, and the storefront pull in the same direction. This is a fast-paced environment where the people who take ownership and run with things go furthest. Responsibilities Take ownership of Mercive's PPC practice, defining best practices and ensuring they're applied consistently across all client accounts Drive paid strategy and execution for retainer clients across Google Shopping, Performance Max, Search, and Demand Gen, turning ad spend into profitable revenue Own product feed strategy and Merchant Center health: titles, attributes, custom labels, supplemental feeds, and disapprovals Build and maintain AI-driven workflows in Claude Code for search term analysis, feed enrichment, budget pacing, anomaly detection, and reporting Steer accounts on business outcomes such as contribution margin, POAS, MER, and new-customer share, not only platform-reported ROAS Own conversion tracking and measurement together with our developers: enhanced conversions, Consent Mode, server-side tagging, and GA4 Run international and multi-market campaigns, aligned with Shopify Markets, local currencies, and languages Plan and execute peak periods such as Black Friday, seasonal drops, and sales, including budget forecasts and stock-aware campaign plans Run structured experiments on bid strategies, campaign structure, creative, and landing pages, and turn the results into shared learnings Monitor performance, diagnose drops in spend efficiency, and act decisively when something changes Work closely with SEO, UX, developers, and project management so paid media is part of new projects from the start Present performance, recommendations, and budget plans to clients in clear commercial terms Stay ahead of how AI is reshaping paid search and shopping, and turn emerging formats into concrete strategies for our clients Provide guidance and mentorship to colleagues, helping raise the overall paid media competence of the agency Qualifications An entrepreneurial mindset: a self-starter who takes initiative, owns outcomes, and holds themselves accountable At least 3 years of professional PPC experience, with the majority spent on e-commerce accounts rather than lead generation or service businesses Deep hands-on experience with Google Ads for e-commerce: Shopping, Performance Max, Search, and Demand Gen Strong command of Google Merchant Center and product feed optimization, ideally with a feed tool such as Channable or DataFeedWatch Hands-on experience with Claude Code or similar agentic AI tools, or a strong drive to master them quickly Comfort with the technical side of paid media: Google Ads scripts, APIs, spreadsheets at scale, and enough SQL or Python to read and adjust what an AI agent writes Solid grasp of e-commerce measurement: GA4, Google Tag Manager, enhanced conversions, Consent Mode, and attribution Commercial understanding of how margins, stock levels, returns, and customer lifetime value should shape bidding and budgets Experience with Shopify stores is a strong plus Experience with international and multi-market accounts Strong analytical skills and the ability to turn data into clear, prioritized recommendations for clients Positive, solution-oriented mindset, with strong organizational skills Benefits Daily lunch at Restaurant Lalala Coffee, soda & snacks in the office Friday bars & fun events Office located in central Copenhagen If you can see yourself being a part of Mercive, please send us your CV and a description of why you are interested in this role. You need to be located close to Copenhagen to be considered for this job. For more information or questions please contact us at 28 74 33 36