Senior Full-stack Developer
your Jared · Poland ·
- Seniority
- Senior
- Category
- Fullstack
- Experience
- 5+ years
your Jared · Poland ·
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Senior full-stack developer building a new product with a Python/FastAPI backend and React/TypeScript frontend, backed by PostgreSQL and OpenSearch in a multi-cloud environment with heavy Databricks usage. Day to day: API design, high-load database/query optimization, front-end work, and applying GenAI tools like Claude Code in a startup-like team based in Poland.
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.
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
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
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
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
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
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