Full Stack Engineer

Sowelo Consulting sp. z o.o. sp. k.

. Build end-to-end product features across the frontend, backend, and AI integrations .

Posted 10/15/2026full-timeRemote • PolandMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in full-stack development with a focus on AI-driven applications, integrating LLMs, and designing robust user experiences. Proficient in system architecture, API design, and cloud deployment, ensuring high reliability and user-centric workflows.

Highest-signal resume keywords

Full-Stack DevelopmentAI-Driven ApplicationsSystem DesignContainerizationUser Experience Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Next.jsPythonNode.jsLLM APIsSQLNoSQLDockerKubernetesAPI ArchitectureDatabase Systems

Soft Skills

Independent JudgmentProduct IntuitionUser-Centric Focus

Tools & Technologies

Cloud OrchestrationDeployment Pipelines

Industry Keywords

AI IntegrationsReal-Time User ExperiencesObservabilityTelemetryGraceful Degradation

Tech Stack

Tools & technologies

CloudDockerJavaScriptKubernetesNext.jsNode.jsNoSQLPythonSQL

About the role

Key responsibilities & impact

Build end-to-end product features across the frontend, backend, and AI integrations
Design multi-step agent workflows handling planning, tool use, failure, and recovery across sessions
Integrate LLMs, memory architectures, and external APIs into reliable production systems
Architect real-time user experiences with streaming states, partial results, and tight latency constraints
Improve system reliability, observability, monitoring, and fallback mechanisms for LLM and tool failures
Collect user signals and telemetry for continuous model evaluation, hallucination reduction, and product iteration
Partner with ML and backend engineering teams to define system architectures and scalable integration patterns
Own the product layer turning AI capabilities into usable, production-grade workflows

Requirements

What you’ll need

Strong professional full-stack development experience using modern frameworks (Next.js, Python, Node.js)
Practical experience building AI-driven applications, RAG systems, or working directly with LLM APIs (OpenAI, Anthropic, open-source models)
Solid understanding of system design, API architecture, and database systems (SQL & NoSQL)
Demonstrated ability to design robust user experiences around network latency, graceful degradation, and non-deterministic model responses
Experience with containerization, deployment pipelines, and cloud orchestration (Docker, Kubernetes)
Ability to handle ambiguity, exercise independent judgment, and take features from idea to production with high ownership
Strong product intuition focused on client-side reliability and proactive, user-centric UX

Benefits

Comp & perks

Fully remote work in Europe
Significant equity
Compensation flexibility
High-impact visibility
Strong ownership
Small, high-talent-density team
Human-reviewed candidate selection without automated screening algorithms or AI-driven scoring systems