Senior Full-stack Developer

your Jared; Wrocław; Hybrid; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Health insurance

Multisport

Shopping vouchers

Employee Stock Purchase Plan (15% off)

Relocation opportunities

Career development programs

Job summary

your Jared seeks a Senior Full-stack Developer to build a new product using Python and FastAPI for the backend, React/TypeScript for the frontend, and PostgreSQL and OpenSearch for database management. The product runs in a multi-cloud environment and relies heavily on Databricks.

You will own features, design APIs, optimize queries, and collaborate with a team in a fast-paced startup, with hybrid work and options to work remotely within Poland.

Qualifications

• 5+ years of hands-on production experience with Python, FastAPI, and SQL.
• Strong expertise in web application development, API design, and integrations.
• Skilled in managing high-load databases and optimizing query performance.
• Some front-end experience with TypeScript and React, along with openness to full-stack work.
• Practical experience using GenAI engineering tools; Claude Code preferred.
• Excellent communication skills and a proactive mindset, comfortable working solo or as part of a team.
• Ability to navigate ambiguity and make progress independently in a transparent, fast-moving startup setting.
• English fluency at B2 level or above.
• Nice to have: TypeScript, React, Next.js, Storybook, Playwright, Radix UI, Zustand.
• Hands-on experience with PostgreSQL and OpenSearch.
• Knowledge of cloud platforms, Infrastructure as Code, and related tooling.
• Experience in data engineering, particularly working with PySpark and Spark SQL.
• Prior experience working directly with clients.

Responsibilities

• Build and maintain web applications with Python/FastAPI and SQL.
• Design APIs and integrations that handle high-load database operations.
• Improve query performance across production systems.
• Support front-end development efforts using TypeScript and React.
• Use GenAI engineering tools to enhance development workflows.
• Work both collaboratively with the team and independently on assigned tasks.
• Maintain proactive communication with team members and stakeholders.
• Own product features and contribute meaningfully beyond simply completing tickets.
• Handle ambiguity and deliver results within a fast-paced startup setting.

Skills

Python

FastAPI

SQL

Web app development

API design

TypeScript

React

GenAI tools

Cloud platforms

IaC

Data engineering

Tools

Claude Code

PostgreSQL

OpenSearch

PySpark

Job description

We’re seeking a Senior Full-stack Developer to help build a new product using Python and FastAPI for the backend, React/TypeScript for the frontend, and PostgreSQL and OpenSearch for database management. The product runs in a multi-cloud environment and relies heavily on Databricks.

Responsibilities

• Build and maintain web applications with Python/FastAPI and SQL
• Design APIs and integrations that handle high-load database operations
• Improve query performance across production systems
• Support front-end development efforts using TypeScript and React
• Use GenAI engineering tools to enhance development workflows
• Work both collaboratively with the team and independently on assigned tasks
• Maintain proactive communication with team members and stakeholders
• Own product features and contribute meaningfully beyond simply completing tickets
• Handle ambiguity and deliver results within a fast-paced startup setting

Requirements

• 5+ years of hands-on production experience with Python, FastAPI, and SQL
• Strong expertise in web application development, API design, and integrations
• Skilled in managing high-load databases and optimizing query performance
• Some front-end experience with TypeScript and React, along with openness to full-stack work
• Practical experience using GenAI engineering tools; Claude Code preferred
• Excellent communication skills and a proactive mindset, comfortable working solo or as part of a team
• Ability to navigate ambiguity and make progress independently in a transparent, fast-moving startup setting
• English fluency at B2 level or above
• Nice to have: Strong background in TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
• Hands-on experience with PostgreSQL and OpenSearch
• Knowledge of cloud platforms, Infrastructure as Code, and related tooling
• Experience in data engineering, particularly working with PySpark and Spark SQL
• Prior experience working directly with clients

We offer Top tech minds driving innovation in AI, cloud, and digital platform modernization Supportive team and agile, startup-like culture Hybrid-by-design mode and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities Career development programs Thought leadership, mentoring, soft skills, and well-being programs Certification: Anthropic, Gemini, GCP, Azure, AWS English classes Stable pay Participation in the Employee Stock Purchase Plan with a 15% discount Benefits package: health insurance, multisport, and shopping vouchers Referral bonuses up to $2,000 Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee, and more Corporate, social, and well-being events

Please note Benefits listed above are available to employees only. B2B contractor cooperation is available; terms are agreed individually. Only selected candidates will be contacted.