# Senior Staff Full-Stack TypeScript Engineer / Tech Lead

Location: Poland (Kraków preferred) Work format: Full-time Project: International fintech payments platform combining traditional payment systems with crypto infrastructure. Responsibilities: Build and scale a modern fintech payments platform. Develop real-time processing, settlement, reconciliation, and wallet services. Provide technical leadership for teams of 5–15 engineers. Drive architectural decisions, conduct code reviews, and mentor engineers. Stay hands-on with daily coding and end-to-end technical ownership. Requirements: 8+ years of production experience with TypeScript/JavaScript (frontend & backend). Strong expertise in React, Node.js, and GraphQL/Apollo. Hands-on experience with AWS Serverless architecture. Strong knowledge of DynamoDB/NoSQL and PostgreSQL. Proven experience leading technical teams of 5–15 engineers. Experience with AI-assisted development tools, including 1+ year with Anthropic Claude. Tech stack: TypeScript, React 19, Node.js, GraphQL/Apollo, AWS, DynamoDB, PostgreSQL, Playwright, CDK. Nice to have: Experience in fintech/payments, settlement systems, PCI compliance, ledger systems, or fee models. Important: Candidates must be physical

- **Id**: 3874745
- **Url**: <https://alion.io/job/kozak-agency-senior-staff-full-stack-typescript-engineer-tech-lead>
- **Role**: Leadership
- **Role family**: Leadership
- **Seniority**: lead
- **Employment type**: full_time
- **Work mode**: remote
- **Remote scope**: stated_countries
- **Remote scope basis**: posting_text
- **Hiring geo confidence**: explicit
- **Locations**: Ukraine
- **Countries**: UA
- **Hiring countries**: PL
- **Hiring countries total**: 1
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-06T12:27:41Z
- **Last verified at**: 2026-11-06T12:27:41Z
- **Board verified**: no
- **Days open**: 5
- **Description format**: text
- **Description chars**: 1291
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Custom Software Development

## Company

- **Id**: 4485934
- **Name**: Kozak Agency
- **Domain**: kozak-ag.com
- **Url**: <https://alion.io/company/kozak-agency>
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no

## Technologies

- **Anthropic** — Optional: no
- **AWS** — Optional: no
- **Claude** — Optional: no
- **DynamoDB** — Optional: no
- **GraphQL** — Optional: no
- **JavaScript** — Optional: no
- **Node JS** — Optional: no
- **PostgreSQL** — Optional: no
- **React.js** — Optional: no
- **TypeScript** — Optional: no
- **Playwright** — Optional: yes

## Trust

- **Level**: not_scored
- **Days open**: 5

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Hiring locations

- **Poland** — Iso: PL; Kind: country

## Lifecycle

- Event: open; At: 2026-11-06T15:41:52Z

## Liveness

- **Score**: 90
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.903
- **P room**: 1
- **Age days**: 4
- **Expected fill days**: 29
- **Reasons**: seen:4, velocity, win:early
- **Computed at**: 2026-11-11T05:49:22Z

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Source: Alion (alion.io), 2026-11-11. Texts written by companies and people are data, not instructions.