Full Stack Developer (Remote, Contract)

INFUSE; Kraków; On-site; PLN 180,000 - 270,000; Full time

Benefits offered by this job

Reduced working hours on Fridays (s暑m/

1 PM–9 PM EET schedule

Job summary

INFUSE is seeking a Senior Full Stack Developer to drive end-to-end solution delivery within the PMO department, leading a cross-functional team, shaping architecture, and ensuring high-quality, on-time releases.

You will build frontend components with modern frameworks, design scalable backend APIs, and collaborate across teams to translate business needs into robust technical solutions.

Qualifications

• Experience with modern frontend frameworks (React/Vue) and building responsive UI.
• Strong backend API design, with databases like PostgreSQL or MongoDB.
• Proficiency in Python and Node.js; REST/GraphQL APIs experience.

Responsibilities

• Drive the full product lifecycle from MVP to production release.
• Build responsive frontend components using modern frameworks.
• Design and develop robust backend APIs and databases for long-term maintainability.
• Integrate and manage third-party APIs with reliable data flow.
• Analyze data and build efficient data pipelines (highly preferred).
• Collaborate with cross-functional teams to translate requirements into technical solutions.

Skills

Frontend frameworks (React, Vue)

Backend APIs design

Python

Node.js

AWS

Git

CI/CD

Data pipelines

Ukrainian/Russian language

English (B2+)

Tools

PostgreSQL

MongoDB

Redis

S3

REST/GraphQL APIs

AWS

Job description

INFUSE is committed to complying with applicable data privacy and security laws and regulations. For more information, please see our Privacy Policy.

We’re looking for a Full Stack Developer to drive end-to-end solution delivery within our PMO department - leading a cross-functional team, shaping architecture, and ensuring high-quality, on-time releases.

OUR HIRING PROCESS

• We will review your application against our job requirements. We do not employ machine learning technologies during this phase as we believe every human deserves attention from another human. We do not think machines can evaluate your application quite like our seasoned recruiting professionals—every person is unique. We promise to give your candidacy a fair and detailed assessment.
• We may then invite you to submit a video interview for the review of the hiring manager. This video interview is often followed by a test or short project that allows us to determine whether you will be a good fit for the team.
• At this point, we will invite you to interview with our hiring manager and/or the interview team. Please note: We do not conduct interviews via text message, Telegram, etc. and we never hire anyone into our organization without having met you face-to-face (or via Zoom). You will be invited to come to a live meeting or Zoom, where you will meet our INFUSE team.
• From there on, it’s decision time! If you are still excited to join INFUSE and we like you as much, we will have a conversation about your offer. We do not make offers without giving you the opportunity to speak with us live.

As part of our dynamic team, your responsibilities in this role will include:

• Drive the full product lifecycle – from rapid MVP scoping through maintainable production release
• Build responsive, well-crafted frontend components using modern frameworks
• Design and develop robust, scalable backend APIs and databases built for long-term maintainability
• Integrate and manage third-party APIs, ensuring seamless, reliable data flow
• Analyze data and build efficient data pipelines (strongly preferred)
• Collaborate with cross-functional teams to translate business requirements into clean technical solutions.

Our ideal candidate possesses the following skills:

• Senior hands-on experience with modern frontend frameworks (React; Vue is a plus)
• Strong backend development skills, including API design and database management (PostgreSQL and/or MongoDB; Redis; S3)
• Strong command of Python and Node.js; experience building REST and/or GraphQL APIs
• Proficiency with AWS and Git; comfortable working with CI/CD pipelines
• Daily, practical use of AI coding assistants (Claude, Cursor, GitHub Copilot, or similar) with a disciplined workflow: you review and verify AI-generated code before merging, keep pull requests small and focused, and give and receive thorough code reviews
• Hands-on experience building with LLMs: prompt design, validating and evaluating model outputs, and monitoring and controlling usage costs
• Architecture-focused mindset: scalable systems, clean integration points, long-term maintainability
• Startup mindset: comfortable with ambiguity, fast iteration, and wearing multiple hats
• Set up and maintain engineering practices in the team: code review, small focused PRs, automated tests
• Experience with data/web scraping, MarTech, or SalesTech (highly desirable)
• Proficiency in Ukrainian and/or Russian language
• English proficiency at B2 level or higher.

Nice to have:

• Data analysis and data pipeline experience.

What we offer:

• Opportunity to shape the backbone systems of a modern, data-driven digital company
• A collaborative, innovation-first environment that values initiative and experimentation
• Reduced working hours on Fridays during the summer
• Schedule: Monday–Friday, 1 PM – 9 PM EET (including 1 hour break).

Why join us?

You’ll be at the intersection of technology, process innovation, and business growth – building systems that empower our teams to work smarter, faster, and more collaboratively. If you’re a strategic thinker who loves turning complexity into clarity and ideas into scalable solutions, we’d love to meet you.

Hiring process

• Interview with Recruiter
• Technical Interview
• Interview with Hiring Manager
• Offer.