# FinTech Client #3 | Senior Full Stack Developer

On behalf of FinTech Client #3, SD Solutions is looking for a talented Senior Full Stack Developer. As a Frontend Engineer, you will take ownership of a strategic, gamified platform that serves as the primary engagement and social hub for tens of thousands of NDA, FinTech associates. You will develop new features for our mobile app, shaping a unique user experience that blends high-stakes business logic with interactive gaming, social networking, and professional training. In this role, you will build the next generation of communication and reward tools that connect our massive user base at the point of sale, directly impacting NDA, FinTech growth, and market exposure. SD Solutions is a staffing company operating globally. Contact us to get more details about the benefits we offer. Responsibilities: Develop and maintain the customer-facing native application. Take ownership of the end-to-end development of new Sunbeast features, from concept to deployment. Collaborate closely with backend engineers to integrate APIs and deliver a seamless, high-performance user experience. Write clean, efficient, and maintainable code, adhering to best practices and team standards. Contribute to a

- **Id**: 3804279
- **Url**: <https://alion.io/job/sd-solutions-fintech-client-3-senior-full-stack-developer>
- **Role**: Backend
- **Role family**: Backend
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: remote
- **Remote scope**: stated_countries
- **Remote scope basis**: board_field
- **Hiring geo confidence**: structured
- **Locations**: Warsaw, Poland
- **Countries**: PL
- **Hiring countries**: PL
- **Hiring countries total**: 1
- **Experience years min**: 5
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-05T12:46:48Z
- **Employer posted date**: 2026-11-05
- **Last verified at**: 2026-11-07T18:27:33Z
- **Board verified**: yes
- **Days open**: 2
- **Description format**: text
- **Description chars**: 2926
- **Description truncated**: no
- **Relocation offered**: no

## Company

- **Id**: 4418535
- **Name**: SD Solutions
- **Domain**: sdsolutions.tech
- **Url**: <https://alion.io/company/sdsolutions-3>
- **Size band**: 51-200
- **Is staffing agency**: yes
- **Employer type**: agency
- **Is intermediary**: no
- **Ats vendor**: Breezy

## Technologies

- **JavaScript** — Optional: no
- **Kotlin** — Optional: no
- **React Native** — Optional: no
- **TypeScript** — Optional: no
- **Claude Code** — Optional: yes
- **Cursor** — Optional: yes
- **Playwright** — Optional: yes
- **React.js** — Optional: yes
- **WebSockets** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 2

## Requirements

- **Experience years min**: 5
- **Manages managers**: no
- **Security clearance**: no

### Education

- **Level**: bachelor
- **Optional**: no

### Languages

- Language: English; Level: Advanced (C1); Optional: no

## Hiring locations

- **Poland** — Iso: PL; Kind: country

## Lifecycle

- Event: open; At: 2026-11-05T12:56:19Z

## Liveness

- **Score**: 54
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.542
- **P room**: 1
- **Age days**: 1
- **Expected fill days**: 11
- **Reasons**: conf:4, agency, velocity, win:early
- **Computed at**: 2026-11-07T05:47:08Z

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Source: Alion (alion.io), 2026-11-07. Texts written by companies and people are data, not instructions.