Senior Software Engineer (Java) at ARQ

✨ The Stack take on this ARQ job

• 🏢 ARQ has 4 jobs here, 4 with visa sponsorship see all
• 🛂 Skilled Worker visa. Standard minimum salary: £41,700 a year guide
• 💡 No salary shown. Ask ARQ if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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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.

Key skills

• Java — in 360 other listings on The Stack
• Spring Boot — in 147 other listings on The Stack
• Postgres — in 69 other listings on The Stack
• REST APIs — in 63 other listings on The Stack
• Microservices — in 236 other listings on The Stack
• TDD — in 44 other listings on The Stack
• DDD — in 18 other listings on The Stack
• Continuous Integration — in 31 other listings on The Stack
• Continuous Delivery
• Backend Development
• Clean Code

On The Stack (as of 2026-11-05)

• ARQ has 3 other listings on The Stack, 3 of them marked as offering visa sponsorship.
• 214 visa-sponsored jobs in the United Kingdom on The Stack, posted in the last 60 days.
• 195 visa-sponsored software engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about ARQ

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.