Senior Fullstack Engineer (AI Product) @ Digital New Agency Poland

Digital New Agency Poland; Poland; On-site; PLN 200,000 - 260,000; Full time

Job summary

Digital New Agency Poland is seeking a senior fullstack developer skilled in React and Python to own AI-powered tax platform features. You will design frontend interfaces, develop Python backends, and ship end-to-end solutions while leveraging customer feedback to guide product decisions.

The role emphasizes collaboration across engineering, AI, product, and domain experts, with a startup-like pace and heavy emphasis on delivering measurable business impact.

Qualifications

• 5+ years of senior fullstack experience with React and Python.
• Strong product mindset focused on user outcomes.
• Ability to own features end-to-end from discovery to production.
• Familiar with cloud infrastructure in GCP and/or Azure.
• Excellent collaboration and communication skills.

Responsibilities

• Build and maintain fullstack features across AI-powered tax preparation, planning and review products.
• Design and implement React interfaces, TypeScript APIs and Python backend services.
• Take ownership of features from the initial problem through release and iteration.
• Work with real usage data and customer feedback to identify improvements.
• Make product and technical decisions without waiting for every detail.
• Collaborate with engineering, AI, product and domain experts.
• Engage with customer-facing teams to shape solutions based on user feedback.
• Keep the codebase clean, typed and performant while moving quickly.
• Balance polishing details with shipping and learning from results.

Skills

React

Python

Fullstack

Product mindset

Ownership

Collaboration

GCP/Azure

On-call availability

Afternoon hours

TypeScript

JavaScript

Google Cloud

Azure

Tools

TypeScript

JavaScript

Google Cloud

Azure

Job description

What are we looking for?

• Senior-level commercial experience (min. 5 years) building fullstack applications (React + Python).
• Strong product mindset - you focus on the user problem and outcome, not only on implementation.
• Proven ability to take ownership of a topic end to end, from an initially unclear need to a working production solution.
• Comfort making decisions with incomplete information and clarifying the scope as you go.
• A pragmatic approach to engineering: you care about quality, but know how to balance it with speed and business impact.
• Strong collaboration and communication skills - autonomy here does not mean working alone.
• Familiarity with cloud infrastructure in Google Cloud and/or Azure.
• Availability and willingness to work in the afternoon (e.g. 12-20) and on‑call 1-2 times a week due to cooperation with clients from the USA.

Bonus points:

• Experience in a fast‑moving startup or scale‑up.
• Experience taking a product or major feature from 0 to 1.
• Experience building software in a regulated or otherwise complex domain.
• Previous experience with AI/LLM‑powered products.
• Experience working directly with users or using product metrics and customer feedback to decide what to build next.

Opportunity to join a fast‑growing AI product company and help build software that is changing how US accounting firms prepare and review taxes.This role gives you real end‑to‑end ownership and the opportunity to build an AI product used in a demanding, real‑world domain.You’ll work on an AI‑powered tax platform designed for professional users who deal with complex decisions every day. The product is already used by hundreds of accounting firms and combines AI with workflows where accuracy, transparency and human judgement really matter.This is not a role focused on implementing predefined tickets. You’ll move between understanding a product problem, designing the solution, building the frontend and backend, shipping it to production and learning from how users actually interact with it.

• Build and maintain fullstack features across AI‑powered tax preparation, planning and review products.
• Design and implement React interfaces, TypeScript APIs and Python backend services.
• Take ownership of features from the initial problem and discovery through implementation, release and further iteration.
• Work with real usage data and customer feedback to understand what should be improved next.
• Make product and technical decisions without waiting for every detail to be defined upfront.
• Collaborate closely with engineering, AI, product and domain experts.
• Talk to customer‑facing teams and use feedback from real users to shape solutions.
• Keep the codebase clean, typed and performant while moving at startup speed.
• Decide where additional polish creates value and where shipping and learning quickly is the better choice.

Requirements:

• Python
• TypeScript
• React
• JavaScript
• GCP
• Azure Cloud