Full Stack Engineer

Job Description

Full-stack DeveloperManna Amsterdam Full-time (40h)Manna runs performance lead generation at scale. We buy traffic on Meta, Google and Native, run proprietary funnels, and deliver qualified leads to enterprise partners across hearing care, home improvement, insurance and meal delivery in the EU and North America.At the centre of this operation sits LeadExpert our in-house platform that routes, validates, caps and delivers every lead we sell. It is our technical moat.The roadmap ahead is ambitious: new platform capabilities, deeper partner integrations, and AI embedded into the parts of the business where it compounds margin.Were expanding our engineering capacity and looking for a Backend Engineer who wants real ownership. You will own meaningful parts of the roadmap end-to-end not ticket cleanup. If you like shipping fast, touching real revenue, and helping turn a performance agency into an AI-first operation, this is the seat.What youll ownPlatform development: take features from spec to production, including the hard ones. Operations is your internal customer, not your manager.AI integration: ship production-grade LLM integrations into the platform and adjacent tooling.API & data integrations: partner endpoints, webhooks, CRM, BI feeds, traffic source APIs clean, logged, monitored.Platform quality: chase root causes, not symptoms. Keep releases predictable.Continuous improvement: bug fixing + structural fixes, not band-aids.Full-stack ownership: backend is core (PHP/MySQL), but you can ship admin UI improvements in HTML/CSS/JS (jQuery today).Technical direction: your opinion on architecture/tooling/AI choices matters.Your profile4+ years backend product experience (PHP/OOP or similar).You can design data models, write SQL that scales, and own features end-to-end.API-first mindset: REST/JSON, webhooks, cron, queues, logging/monitoring.Hands-on with AI: built with OpenAI / Anthropic APIs (or actively shipping similar).Structured operator: tickets, docs, releases you dont need chasing.Commercial instinct: you like building things that map to revenue/margin/retention.Fluent English; Dutch is a plus, not required.Nice to havePython or Node alongside PHP.Marketing/ad-tech/lead-gen/CRM/CDP platform experience.CI/CD, Docker, observability tooling (Sentry/ELK or similar).Composer, PSR standards, PHPUnit.Our stack todayPHP, MySQL, HTML, CSS, JavaScript (jQuery), Git, REST/JSON APIs, webhooks, cron and queues, the in-house LeadExpert platform, CRM and BI tooling.We are deliberate about where we modernise (AI layer, data pipelines, observability) and where we dont. You help shape those calls.What we offerCompetitive salary, depending on experienceAnnual performance-based bonusTravel allowanceHybrid working model and flexible remote work policy25 vacation days with the option to purchase 10 additional daysDaily healthy hot lunch at the officeAccess to the Alleo employee benefits marketplace (100+ options)30 monthly Alleo credit50 birthday budgetAccess to OpenUp / Headspace, including 24/7 support from certified psychologistsWIA insurance is fully paid by Creative ClicksDiscount on health insurance discount CZA fast-paced, performance-driven environment with real ownershipGrowth opportunities within a global performance marketing organizationAn international team of 25 nationalities in a modern office near LeidsepleinA sample weekMonday: refinement with Operations; translate questions into platform solutionsTuesday: take a new API integration live and document itWednesday: MySQL performance tuning + small UI improvements in LeadExpertThursday: bug fixes, feedback adjustments, prepare and roll out releaseFriday: demo new features; capture improvements and plan follow-up