Senior Product Engineer (Platform)

ApplyMint; Denmark; On-site; DKK 670,000 - 820,000; Full time

Job summary

ApplyMint is building an AI director for interactive entertainment, and we’re hiring a Senior Product Engineer to join the small engineering team in Denmark. You’ll own the platform around the narrative engine—the systems that deliver stories to players, the creator tools, and the reliable infrastructure that keeps it running.

You’ll work on platform architecture, real-time delivery, and integrations with third‑party services, using TypeScript, React, Next.js, and Node backends.

Qualifications

• 4–5+ years, hands-on; senior enough to work unsupervised and code daily.
• A finisher who ships and maintains.
• Autonomous and proactive.
• Data-driven, measure product usage and costs.
• User‑experience focused, collaborates with designers.
• Communicates openly and flags problems early.

Responsibilities

• Platform architecture: real-time delivery of AI-generated narratives and scalable catalogs.
• Build creator tools to design characters, settings, and AI-driven stories.
• Manage payments, plans, paywalls, entitlements, refunds.
• Coordinate slow or unreliable APIs with retries and fallbacks.
• Deployment, monitoring, tracing, debugging production costs.
• Code reviews, CI, testing culture, and CI/CD improvements.

Skills

TypeScript

React

Next.js

Tools

Node.js

Job description

01The role

Build the platform the stories run on

Hey I'm Erik (CTO). My background is in ML and computer vision (PhD, Google Research / DeepMind), and I've been a narrative RPG gamer most of my life.

I'm hiring a Senior Product Engineer to join our engineering team of three. My focus is the core narrative engine, the AI that tells coherent stories. This role owns the platform around it: the systems that deliver those stories to players, the tools creators build with, and the infrastructure that keeps it all reliable, scalable, and built right.

You own everything around the narrative engine: the systems that deliver stories to players, the tools creators build with, and the infrastructure that keeps it standing.

You don't need ML, LLM, or AI research experience. We want a strong product engineer.

02What you'll work on

Six things on your plate (at least)

• Platform architectureReal-time delivery of AI-generated narrative: closer to a media platform than a SaaS app. Large catalogs, media storage and delivery, search, caching, query performance.
• Creator toolingTools for creators to design characters, settings, and story elements the AI brings to life.
• Payments and subscriptionsPlans, paywalls, entitlements, failed payments, refunds.
• Orchestrating third‑party APIs that are slow, expensive, or unreliableRetries, fallbacks, caching, graceful failure.
• Monitoring and operationsDeploys, alerting, tracing, debugging production, performance and cost work.
• Engineering foundationsCode review, CI, testing culture, and a CI/CD setup we can iterate on fast.

03Who you are

Who you are

• 4–5+ years, hands‑on. Senior enough to work unsupervised and to have seen good engineering practice up close, and still writing code every day.
• A finisher. You talk about what you shipped and maintained, not what you started.
• Autonomous. You don't need work broken down for you, you don't go quiet for a week, and foundational calls with no playbook energise you.
• You measure things. You want numbers on how the product is used and what it costs to run before deciding.
• You care about user experience. A janky transition bothers you, and you treat the designer as a partner rather than silently improvising.
• Communicative. You flag problems early and disagree openly.

Technical skills

• Strong TypeScript, React, and Next.js, with depth and repeated use.
• Node / TypeScript backend services. This is where most of the backend work sits.
• Backend fundamentals: data modeling, API design, async jobs, queues, background processing.
• Agentic engineering: fluent with coding agents (Claude Code, Cursor, Codex). We want to leverage AI without shipping slop.
• Comfortable reading and writing Python.

Nice to have

None of these are required.

Consumer products with real usersMedia, streaming, entertainment, games, creative tools, marketplaces.

Subscription businessesBilling, paywalls, entitlements.

Realtime systemsReactive backends (Convex, Firebase, Supabase), SSE, websockets, live‑updating interfaces.

Audio or video pipelinesEncoding, storage, CDN, playback.

Analytics and experimentationEvent tracking, funnels, A/B testing, feature flags (PostHog, Amplitude, Mixpanel, Segment).

Early hire at a company that then grewOr small teams with broad ownership.

Polished, design‑led interfacesSend links or screenshots.

Side projects that show initiativeOpen source, game jams, interactive fiction.

04Compensation

DKK 670,000–820,000+0.5–1% equity

What we buildAn AI director for interactive entertainment. People live inside stories as the protagonist while the AI generates what happens next.

BackingTier 1 investors in SF and Europe.