Fullstack Engineer (AI, Distributed Systems, Automation)

Talanto; Kraków; Hybrid; PLN 156,000 - 223,000; Full time

Job summary

Talanto in Kraków is seeking a talented Fullstack Engineer to build complex systems, integrate external services, and leverage AI tools to speed up development and automate workflows. You’ll develop end-to-end features for SaaS products and internal tools with Next.js, React.js, Node.js and NestJS, while designing APIs and implementing AI-driven automation.

Fluent English and Polish are expected, and you’ll collaborate with product, data, and leadership teams to turn ideas into production-ready

Qualifications

• 2.5+ years of professional full-stack experience.
• Strong frontend skills in React.js and Next.js.
• Backend experience with Node.js (NestJS preferred).
• Experience integrating external APIs with auth, pagination, retries, rate limits.
• Hands-on experience with modern AI tools (OpenAI, Claude, Cursor).

Responsibilities

• Develop and contribute to end-to-end features across SaaS products and internal tools.
• Build modern frontends with Next.js and React.js.
• Develop scalable backend services using Node.js/NestJS.
• Design and integrate APIs (REST, WebSockets, external services).
• Build and maintain automation workflows and background jobs.
• Work with async systems, queues, and event-driven architectures.
• Integrate third-party services with rate limits and auth flows.
• Use AI tools to improve development speed and testing.
• Collaborate with product, data, and leadership teams.
• Ship MVPs and prototypes from scratch; validate ideas quickly.

Skills

React.js

Next.js

Node.js

AI tooling

English Polish

Tools

NestJS

REST

WebSockets

OpenAI / Claude

Job description

14,000 – 20,000 PLN

Important: if an employer asks you to log into their system via iCloud or Google, send a code, an SMS or Telegram password, run some code, or install software — refuse. These are signs of fraud.

At •••••••••• , we’re more than just an email marketing agency and digital solutions provider. We build cutting-edge, socially impactful products that redefine how businesses operate in the digital world.

We’re looking for a Fullstack Engineer who enjoys building complex systems, integrating external services, and leveraging AI tools to speed up development and automate workflows.

If you’re excited about combining modern frontend development with AI-driven workflows and automation tools like Claude Code, Cursor, and LLM frameworks, this one is for you.

What You’ll Do

Develop and contribute to end-to-end features across SaaS products and internal tools, collaborating with senior engineers on architecture and implementation decisions.

Build modern, high-performance frontends using Next.js and React.js

Develop scalable backend services using Node.js / NestJS

Design and integrate APIs (REST, WebSockets, external services)

Build and maintain automation workflows and background jobs

Work with async systems, queues, and event-driven architectures

Integrate third-party services with real-world constraints (rate limits, retries, auth flows)

Use AI tools to improve development speed, testing, and automation

Collaborate directly with product, data, and leadership teams

Build MVPs, proof-of-concepts, and new product ideas from scratch

Rapidly validate business ideas through experimentation and iteration

Help evolve successful prototypes into production-ready systems

AI & Automation

This role includes working with modern AI tooling and automation systems, with a strong focus on speed, ownership, and execution:

Using tools like Claude Code, Cursor, and OpenAI SDK in daily development

Building AI-driven workflows and integrations quickly and iteratively

Automating repetitive processes (data handling, content, integrations)

Applying LLMs in production with a pragmatic, results-first approach

Taking ownership of problems - from idea to production

Shipping fast, testing in real conditions, and iterating based on outcomes

Being accountable for delivery - not just writing code, but making things work end-to-end

Prioritizing execution over perfection - speed is key

What We’re Looking For

2,5+ years of professional full-stack experience

Strong frontend skills in React.js / Next.js

Backend experience with Node.js (NestJS preferred)

Experience integrating external APIs (auth, pagination, retries, rate limits)

Hands‑on experience with modern AI tools (OpenAI, Claude, Cursor, etc.)

Experience working with async processing, queues, and background jobs

Understanding of building reliable systems (error handling, retries, observability)

Strong communication skills and ability to work cross‑functionally

Fluent in English and Polish

Nice to Have

Experience with Rust (async, Tokio, Axum)

Experience with Elixir (Phoenix LiveView, GenServer)

Understanding of distributed systems and architectures

Experience with multi-region deployments and geo‑distributed infrastructure

Experience building systems with high parallelism (a large number of workers processing jobs concurrently)

Familiarity with distributed databases and data consistency trade‑offs

Experience with multi‑tenancy architectures (tenant isolation, scaling strategies)

Experience working with high‑throughput event pipelines

Frontend: Next.js, React.js

AI/ML & Automation: Proprietary GenAI models, OpenAI, Claude, internal tooling

Integrations: REST, gRPC, WebSockets, external APIs with rate limits

Why Join Us?

Work on high-scale SaaS systems processing hundreds of millions of events daily, with real-time pipelines and data-heavy workloads.

Ownership from day one - influence architecture, technology choices, and product direction.

Collaborate with world‑class engineers, AI specialists, and PMs.

Innovation‑first culture - explore cutting‑edge frameworks and architectures.

Fast execution, minimal bureaucracy, no unnecessary meetings

Opportunity to work with modern AI tooling in production

Competitive senior‑level compensation and career growth.

Social impact - contribute to automation products that empower businesses and communities.