Senior Software Engineer (Web)

About MirrorWeb

MirrorWeb is an intelligent communications supervision platform built for regulated financial services firms that need to scale supervision safely, defensibly and without operational collapse. 

Compliance teams today are dealing with a permanent shift: channel explosion (mobile, social, collaboration tools), volume that outpaces humans and regulators who didn't lower the bar. The result is simple: teams are drowning in data but starving for signal. 

Most firms get stuck between three flawed options: 

• Legacy archiving & supervision platforms (manual, queue-based, connector-centric, brittle, slow to adapt) 

• Point AI compliance tools (narrow, opaque, hard to defend in audits) 

• DIY + services-heavy approaches (stitched-together systems and spreadsheets that don't scale) 

MirrorWeb was built for this moment: AI-native supervision designed for regulated reality where AI helps prioritize risk and focus human attention, while preserving accountability regulators accept. 

Our mission: help regulated firms communicate freely and confidently, knowing supervision stays scalable, defensible, and auditable as the world changes. 

The Role

As a Senior Software Engineer on our Web Team, you'll be at the forefront of building our next-generation archival and search platform. You'll work on challenging problems around web content capture, large-scale data processing, and creating intuitive interfaces for complex compliance workflows.

Your Impact:

• Shape the architecture of systems processing millions of web interactions daily
• Build features that directly help organisations meet critical compliance requirements
• Mentor junior engineers and contribute to our engineering culture
• Drive technical decisions that affect our entire platform

What You'll Do:

• Build Full-Stack Features: Develop end-to-end features using React, Remix, and Node.js, from database to UI
• Scale Our Platform: Design systems that handle billions of archived items with sub-second search capabilities
• Master Web Capture: Create sophisticated web scraping solutions that preserve dynamic content, including complex SPAs
• Optimise Cloud Infrastructure: Leverage AWS services (Lambda, ECS, Aurora) to build cost-effective, scalable solutions
• Champion Best Practices: Implement Infrastructure as Code, maintain CI/CD pipelines, and ensure code quality
• Collaborate Cross-Functionally: Work with Product, Design, and Customer Success to deliver customer value

About You

Essential:

• 4+ years of commercial experience in full-stack JavaScript development
• Strong proficiency with React and Node.js ecosystems
• Production experience with AWS services (particularly Lambda, RDS/Aurora, S3)
• Understanding of PostgreSQL/MySQL at scale
• Track record of delivering complex features from concept to production

Desirable:

• Experience with Remix framework
• Experience with web scraping, browser automation, or content extraction
• Knowledge of Python or Go
• Experience with Parquet or Analysing data in Object storage
• Terraform/Infrastructure as Code experience
• Background in compliance, archival, or data-intensive applications
• Experience with message queuing systems (SQS/SNS)

Tech Stack:

• Frontend: React, Remix, TypeScript
• Backend: Node.js/Deno, Python and Go services
• Cloud: AWS (Lambda, EC2, ECS Fargate, Aurora PostgreSQL/MySQL, S3, SQS/SNS)
• Infrastructure: Terraform, GitHub Actions
• Data: Large-scale PostgreSQL, ClickHouse

Why MirrorWeb?

Culture

• Join during an exciting scale-up phase with significant influence on technical direction
• Work with a team that values bold thinking and isn't afraid to challenge incumbents
• Strong collaborative environment where engineering teams actively support each other
• "One team" mentality - we win together and celebrate each other's successes

Ready to Build the Future of Web Archiving?

If you're excited about solving complex web capture challenges, building elegant solutions at scale, and working with a team that's setting the standard for digital compliance, we want to hear from you.

This role reports to our Engineering Manager, Web Team and offers real ownership over features that directly impact thousands of users daily. We value diverse perspectives and encourage applications from candidates who might not tick every box but bring unique experiences and genuine passion for full-stack development.

Apply now and help us build the infrastructure that powers the future of compliant communications.

What's on Offer:

• Private Healthcare & Cash Plan – Premium coverage for you and your family.
• Life Assurance – Financial peace of mind for you and your loved ones.
• Salary Sacrifice Pension – With investment flexibility to suit your needs.
• Generous Paid Time Off – 25 days annual leave, plus a day off on your birthday and paid sick leave
• Enhanced Family Leave – Extra support for life's most important moments.
• Flexible Lifestyle Benefits – £100 monthly Juno allowance for health, wellness, learning, or what matters most.
• Equity Appreciation Rights (EAR) – Share in our success through our equity incentive program.