Senior Full-stack Developer

your Jared; Województwo pomorskie; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Employee Stock Purchase Plan

Health insurance

Multisport

Shopping vouchers

Referral bonuses

Hybrid/remote within Poland

Work abroad up to 60 days

Relocation opportunities

Career development programs

English classes

Job summary

your Jared is seeking a Senior Full-stack Developer to join a team building a new product using Python and FastAPI on the backend and React/TypeScript on the frontend, with PostgreSQL and OpenSearch driving data.

The role emphasizes hands-on development, API design, high-load query optimization, GenAI tooling, and proactive collaboration in a fast-moving startup environment with hybrid/remote options in Poland.

Qualifications

• 5+ years of production experience with Python, FastAPI, and SQL.
• Expertise in web application development, API design, and integrations.
• Familiarity with front-end development using TypeScript and React.
• Hands-on experience with GenAI engineering tools.

Responsibilities

• Develop and maintain web applications using Python/FastAPI and SQL.
• Design APIs and integrations to support high-load database operations.
• Optimize query performance across production systems.
• Contribute to front-end development using TypeScript and React.
• Apply GenAI engineering tools to improve development workflows.
• Collaborate with the team and work autonomously on tasks.
• Communicate proactively with team members and stakeholders.
• Take ownership of product features in a fast-paced startup.

Job description

We are looking for a Senior Full-stack Developer to join a team building a new product that leverages Python and FastAPI on the backend, React/TypeScript on the front end, with database management powered by PostgreSQL and OpenSearch. The product operates in a multi-cloud environment and makes heavy use of Databricks.

Responsibilities

Develop and maintain web applications using Python/FastAPI and SQL Design APIs and integrations that support high-load database operations Optimize query performance across production systems Contribute to front-end development using TypeScript and React Apply GenAI engineering tools to improve development workflows Collaborate with the team while also working autonomously on assigned tasks Communicate proactively with team members and stakeholders Take ownership of product features and drive meaningful contributions beyond ticket completion Navigate ambiguity and deliver results in a fast-paced startup environment

Requirements

5+ years of production experience with Python, FastAPI, and SQL Expertise in web application development, API design, and integrations Proficiency in handling high-load databases and query performance optimization Familiarity with front-end development using TypeScript and React, with willingness to work full-stack Hands-on experience with GenAI engineering tools, ideally Claude Code Strong communication skills and proactivity, with the ability to work both independently and within a team Capability to deal with ambiguity and get things done without constant direction in a transparent, fast-moving startup environment English proficiency at B2 level or higher

Nice to have

Solid experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand Experience with PostgreSQL and OpenSearch Familiarity with cloud platforms, Infrastructure as Code, and related tools Background in data engineering, handling data with PySpark and SparkSQL Client-facing experience

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 Growth opportunities Career development programs Thought leadership, mentoring, soft skills and well-being programs Certification (Anthropic, Gemini, GCP, Azure, AWS) English classes

Benefits

Stable pay Participation in the Employee Stock Purchase Plan with a 15% discount Benefits package (health insurance, multisport, 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 We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually We will reach out to selected candidates exclusively