Junior/Mid Software Engineer – FinTech Trading Platform (Amsterdam or Remote EU)

This is a part-time (10–30 hours/week) contract role, remote from the EU. Flexible hours.As one of the earliest engineers on the platform, you’ll work directly with the founders and get broad exposure across the stack. The role starts part-time, but depending on fit and company growth, it can evolve into a core engineering position over time. If you want ownership, visibility, and a fast learning curve inside an Amsterdam-based fintech, this is a strong fit.Profectus.AIProfectus.AI is building the “WordPress for algorithmic trading”. Our no-code MT5 automation platform lets traders visually build, test and deploy algorithmic strategies without writing a single line of code.We’re an Amsterdam fintech operating out of Beursplein — the historic Amsterdam Stock Exchange — and we’re building real trading infrastructure used by thousands of traders.As we scale, we’re preparing our next frontier: integrating advanced AI capabilities into the strategy builder in 2026. Joining now means you’ll help build the current core platform and shape the AI-powered evolution that comes next.We’re hiring a Junior/Mid Software Engineer to join our product team. You’ll work directly with the founders on a documented system that includes backend microservices, a visual strategy builder, REST APIs and MT5 export logic.What You’ll Work OnYou’ll help build and extend our trading automation platform across the stack:Frontend (React)Visual no-code strategy builderUI for indicators, templates, and strategy logicConnecting frontend flows to backend APIsBackend (Java + Spring Boot, Dockerized)Contract-first REST APIs aligned with frontend needsDomain models for trading strategiesCode-generation services (MQL5 exports)Task queues and async job processingIntegrations with MT5 and external APIsInfrastructureSupabase / PostgresDocker-based local developmentMicroservices and serverless componentsClean and reliable deployment workflowsFeature areas you may own earlyLink-sharing featureIndicator engineStrategy template systemIP-protection logicLive-account analytics MVPBuilder performance improvementsYou’ll step into a codebase built with a contract-first API design, strong backend structure, and clear API/UI boundaries.ResponsibilitiesBuild new features across frontend and backendImprove system architecture, reliability and performanceWork closely with founders on product decisionsWrite maintainable, well-documented codeSupport MT5-related integrations (no MQL5 experience needed)Participate in testing and deployment workflowsWhat You Bring1–3 years of engineering experienceStrong JS fundamentals (React)Experience with Java + Spring Boot (or strong backend exposure in a similar framework)Curiosity for fintech, trading, or automationAbility to work independently and think in systemsComfortable communicating in EnglishNice to HaveExperience with Postgres or SupabaseFamiliarity with API-first development (OpenAPI, Swagger)Docker / container-based dev experienceInterest in algorithmic trading or MT5Experience in a startup or small team environmentWhat We OfferA meaningful role in a fast-moving Amsterdam fintechA documented codebase to onboard into (rare in early-stage startups)Direct access to founders and real product ownershipRemote-friendly across EU timezonesCompetitive compensation aligned with experienceHigh learning curve and fast career growthShipping real features to real users from day oneHow to ApplySend your LinkedIn/GitHub and a short intro. We care more about your skills, energy and learning speed than a perfect CV.