# Senior Back End Engineer (Node.js) - Adaptiq

We are looking for an experienced Senior Back End Engineer to join a product engineering team working on complex, large-scale software systems. This is a predominantly backend-focused role, with occasional frontend development whenResponsibilities Design, develop, and maintain scalable production backend services using TypeScript and Node.js. Take ownership of system-design decisions for new capabilities and ensure seamless integration with existing infrastructure. Collaborate with product and engineering teams to understand requirements and translate them into effective technical solutions. Design and optimize PostgreSQL queries, indexes, and database performance. Contribute to React-based frontend functionality when Experience 7+ years of professional backend development experience building production systems at scale, with a strong understanding of distributed systems. Strong hands-on expertise in TypeScript and Node.js, including developing and maintaining complex backend services. Solid system-design skills, with the ability to evaluate architectural options and explain technical decisions and trade-offs. Strong PostgreSQL expertise, including complex SQL queries, query optimi

- **Id**: 4309328
- **Url**: <https://alion.io/job/adaptiq-senior-back-end-engineer-node-js-adaptiq>
- **Role**: Backend
- **Role family**: Backend
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Warsaw, Poland
- **Countries**: PL
- **Hiring countries total**: 0
- **Experience years min**: 7
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-10-20T00:00:00Z
- **Employer posted date**: 2026-10-28
- **Last verified at**: 2026-11-14T10:52:54Z
- **Board verified**: yes
- **Days open**: 25
- **Description format**: text
- **Description chars**: 1630
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Artificial Intelligence, Cybersecurity, Transportation & Logistics

## Company

- **Id**: 4485822
- **Name**: Adaptiq
- **Domain**: adaptiq.co
- **Url**: <https://alion.io/company/adaptiq>
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Schema

## Technologies

- **CI/CD** — Optional: no
- **Docker** — Optional: no
- **Kubernetes** — Optional: no
- **Node JS** — Optional: no
- **PostgreSQL** — Optional: no
- **React.js** — Optional: no
- **SQL** — Optional: no
- **TypeScript** — Optional: no
- **JavaScript** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 25

## Requirements

- **Experience years min**: 7
- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-11-14T10:52:54Z

## Liveness

- **Score**: 33
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.742
- **P room**: 0.45
- **Age days**: 25
- **Expected fill days**: 17
- **Reasons**: conf:4, win:tail
- **Computed at**: 2026-11-14T15:28:02Z

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Source: Alion (alion.io), 2026-11-14. Texts written by companies and people are data, not instructions.