# Senior Software Engineer (Java) at ARQ

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Design, implement and maintain scalable

- **Company:** ARQ (https://jobs.trythestack.co/companies/arq)
- **Location:** London, United Kingdom
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Java, Spring Boot, Postgres, REST APIs, Microservices, TDD, DDD, Continuous Integration, Continuous Delivery, Backend Development, Clean Code
- **Posted by employer:** 2026-06-12
- **Added to The Stack:** 2026-06-13
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/ARQ/80ed60fc-9a53-4979-bdcc-b44fd7366bf4 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-software-engineer-java-arq

## About the role

Responsibilities:
- Design, implement and maintain scalable backend services and REST APIs using Java (Java 25) and Spring Boot.
- Lead greenfield development and evolve existing systems for card payments, treasury, transaction booking and crypto liquidity.
- Apply TDD, DDD and clean code practices to ensure maintainability and fast iteration.
- Collaborate with product, QA and operations to deliver features end-to-end and ensure production reliability.
- Participate in code reviews, mentor engineers and help improve engineering processes and CI/CD pipelines.

Requirements:
- Proven backend development experience with Java and Spring Boot.
- Strong experience with relational databases (Postgres) and building RESTful microservices.
- Comfortable with TDD/DDD, CI/CD and delivering high-quality code in a fast-moving environment.
- Degree in Computer Science, Engineering or related discipline (or equivalent experience).
- Excellent English communication skills and experience working in cross-functional teams.
- Experience building products at scale or in hypergrowth startup environments is preferred.

## Responsibilities

Design, develop, and maintain scalable backend systems and REST APIs to power fintech products. Focus on greenfield development and improving systems for card payments, treasury management, and crypto liquidity.

## Requirements

Requires a Bachelor's degree in Computer Science or a related field and demonstrable fluency in Java backend development. Candidates should have a track record of building complex products for hypergrowth startups and possess excellent English communication skills.

## FAQ

- **Is this Senior Software Engineer  (Java) role still open?** It was posted on 2026-06-12. Listings more than 30 days old may no longer be active, so check ARQ's site before applying.
- **Does ARQ offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on ARQ's site.
- **Where is this role located?** The listing gives the location as London, United Kingdom. It is marked on-site.
- **What skills does this role ask for?** The listing names: Java, Spring Boot, Postgres, REST APIs, Microservices, TDD, DDD, Continuous Integration, Continuous Delivery, Backend Development, Clean Code.

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## Notes for agents

- Apply on the employer's page (https://jobs.ashbyhq.com/ARQ/80ed60fc-9a53-4979-bdcc-b44fd7366bf4). The Stack does not take applications.
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