Senior Full Stack Engineer

🕒 August 21

🇵🇱 Poland – Remote

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 37%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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MWDN

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

📦 Logistics

🏥 Healthcare

Consulting • Logistics • Healthcare

MWDN is a comprehensive IT services company that specializes in software development, web design, mobile development (iOS and Android), and desktop development. With over 200 in-house software engineers, MWDN provides a range of services including staff augmentation, dedicated teams, and global IT recruitment. Operating globally with delivery centers in Central and Eastern Europe, MWDN effectively bridges businesses in the USA, Europe, and Israel to top-tier tech talent while focusing on cost-effective solutions and personalized services tailored to client needs.

📋 Description

• Build secure, scalable full-stack product features • Design data models, APIs, integrations, and backend architecture • Create reliable data pipelines with strong validation and observability • Ship high-value, high-trust AI/LLM-powered features • Build safe agentic workflows with scoped tools, permissions, logging, evals, and failure handling • Debug issues across ingestion, transformation, database, API, UI, and AI context • Design systems with security, privacy, auditability, and observability • Work across data ingestion, transformation, storage, APIs, product surfaces, AI workflows, agentic systems, and observability

🎯 Requirements

• 8+ years building production software • Strong experience with TypeScript, React, and SQL • Deep backend architecture, API, data modeling, and production debugging skills • Significant experience with data pipelines, integrations, or data-heavy systems • Experience building systems handling sensitive, regulated, and high-trust data • Production experience shipping robust AI/LLM-powered features • Strong understanding of evals, hallucinations, malformed outputs, retrieval quality, latency, cost, model drift, and provider risk • Good judgment about when to use LLMs, retrieval, improved data foundations, or deterministic code • Excellent written and verbal communication in English • High ownership, high agency, and low ego • Understanding of prompt injection, permission boundaries, data exfiltration risk, secrets handling, audit logs, and human-in-the-loop review • Comfort with access control, Postgres RLS, PII handling, secrets management, audit trails, least privilege, secure integrations, and safe third-party API usage • Experience with sturdy data pipelines, data validation, reconciliation, lineage, observability, audit systems, AI evals, AI observability, agent testing, or AI red-teaming • Experience in high-trust data environments such as finance, investment, legal, healthcare, or enterprise SaaS • Experience with Supabase, Postgres RLS, Deno, Modal, embeddings, vector search, transcription, GPU workloads, or similar infrastructure

🏖️ Benefits

• Security through careful client vetting to minimize risks and ensure reliable, timely payments • Career support and assistance finding new opportunities • Legal assistance with independent contractor or sole proprietorship status, taxes, and related processes • English courses and professional growth opportunities • Team-building events • Flexible working hours • 29 days of PTO (18 working days per year plus all national holidays) • 10 paid recovery days • Full financial and legal support for independent contractors • Free English classes with native speakers or Ukrainian teachers • Dedicated HR support