Remote Backend Software Engineer with Ownership and Impact

Addition; Greater London; On-site; GBP 65,000 - 95,000; Full time

Benefits offered by this job

Fully remote

Competitive salary

25 days annual leave

Pension contribution

Company laptop and monitors

Job summary

Addition Solutions is seeking an experienced Software Developer to join its engineering team fully remotely. You will design, develop and maintain the core SaaS platform, with emphasis on reliable backend services, APIs and multi‑party integrations.

You’ll also engage with frontend code when needed and own production systems to ensure resilience. Ideal candidates bring 4–6 years of commercial software experience, strong backend skills in C#, Go, or Java, and a pragmatic, ownership‑driven

Qualifications

• 4–6 years of commercial software development experience.
• Strong backend development experience with C#, Go, and Java or similar languages.
• Experience designing, building and maintaining APIs.
• Experience with production systems and cloud-native environments.

Responsibilities

• Design, develop and maintain reliable backend services and APIs.
• Take ownership of production systems and resolve issues as they arise.
• Build and maintain integrations with multiple third‑party services.
• Debug complex problems using logs and system information.
• Maintain and improve existing code, including legacy systems.
• Contribute to modern frontend code when required.
• Make pragmatic engineering decisions focused on reliability and maintainability.
• Support platform scalability and continued development.

Skills

Backend development

C#

Go

Java

Job description

Addition Solutions is seeking an experienced Software Developer to join its engineering team fully remotely. You will design, develop and maintain the core SaaS platform, with emphasis on reliable backend services, APIs and multi‑party integrations.

You’ll also engage with frontend code when needed and own production systems to ensure resilience. Ideal candidates bring 4–6 years of commercial software experience, strong backend skills in C#, Go, or Java, and a pragmatic, ownership‑driven