Staff Software Engineer

SR2 | Socially Responsible Recruitment | Certified B Corporation™; Greater London; Hybrid; GBP 80,000 - 120,000; Full time

Job summary

A leading B2B SaaS company is seeking a Backend Staff Software Engineer to join their mission-driven team. This role involves leading architectural decisions, mentoring engineers, and developing robust backend systems using Python and other technologies. The position offers flexible remote working options and a competitive salary package.

Benefits

25 days annual leave + 8 bank holidays + 5 paid sick days

Flexible remote working

Pension plan

Parental leave and “Getting Started” stipend

5-day Work From Abroad policy

Qualifications

• 7+ years of backend engineering experience with deep Python expertise.
• 3+ years in a technical leadership or staff-level technical role.
• Strong architectural skills with microservices, CI/CD, and cloud infrastructure.

Responsibilities

• Own the full development lifecycle of complex features and systems.
• Design scalable, distributed backend systems and lead architectural decisions.
• Mentor engineers and champion best practices.

Skills

Python

Java

AWS

Terraform

Education

Bachelor's or Master’s in Computer Science

Tools

Docker

MySQL

GitHub Actions

Job description

SR2 | Socially Responsible Recruitment | Certified B Corporation provided pay range

This range is provided by SR2 | Socially Responsible Recruitment | Certified B Corporation. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

Direct message the job poster from SR2 | Socially Responsible Recruitment | Certified B Corporation

Helping Scale-Ups Build Their Engineering Teams - Tech for Good Consultant at SR2 | Socially Responsible Recruitment | Certified B Corporation | …

Staff Software Engineer – Backend - UK-Based – Up To £120k

Python, Java, AWS, Terraform

Are you a seasoned backend engineer ready to take the lead on complex systems at scale? I am helping a leading B2B SaaS find a Backend Staff Software Engineer to join a high-performing, collaborative, and mission-driven team building software that powers the global built environment.

This role can be remote from anywhere in the UK or if you are based in London hybrid - 2 days in office.

You’ll play a pivotal role in shaping and delivering robust backend systems using Python, and the tech stack also includes Java, AWS and Terraform, while mentoring engineers and championing technical excellence. You’ll join a rapidly scaling (25% in 12 months!), PE-backed SaaS company with over 20 years of product maturity and almost 1000 customers worldwide.

What You’ll Do

• Own the full development lifecycle of complex features and systems
• Design scalable, distributed backend systems and lead architectural decisions
• Collaborate cross-functionally with Product and other Engineering teams to solve high-impact challenges
• Guide and mentor engineers, providing technical leadership and championing best practices
• Drive improvements in security, reliability, and performance
• Advocate for high-quality documentation and strong engineering culture

What You Bring

• 7+ years of backend engineering experience with deep Python expertise
• 3+ years in a technical leadership or staff-level technical role
• Strong architectural skills with microservices, CI/CD, and cloud infrastructure
• Experience in Agile/Scrum environments
• Bachelor's or Master’s in Computer Science or related field

Tech Stack: Python, Java, Terraform, Docker, AWS, MySQL, GitHub Actions

What’s on Offer

• 25 days annual leave + 8 bank holidays + 5 paid sick days
• Flexible remote working (2 in-office days per week for London-based team)
• Pension plan
• Parental leave and “Getting Started” stipend
• 5-day Work From Abroad policy

You’ll be part of a passionate, diverse, and collaborative team dedicated to solving real-world challenges in architecture, construction, and engineering through powerful software tools. This role is looking for someone who is focused on technical rather than people leadership.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  IT Services and IT Consulting, Construction, and Civil Engineering

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