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Senior Software Engineer

Senior Software Engineer

Aries GlobalLondon Area, United Kingdom, United Kingdom
15 days ago
Job type
  • Permanent
Job description

Senior Software Engineer – Platform Team

Reports to : Head of Engineering

About Aries Global

Aries is a high-growth, founder-led group of profitable software companies, building the connective tissue for the $50B+ cloud ecosystem — and transforming how SaaS companies scale through a shared AI and growth infrastructure .

We acquire and unify niche B2B SaaS companies, investing ~$200M annually from a base of permanent capital . Our platform unlocks compounding value across our group through centralised product, data, and engineering systems — powered by a world-class team.

The Role : Senior Software Engineer

As a Senior Software Engineer on the core Aries engineering team, you’ll play a key role in designing and building the foundational systems that power our platform — enabling fast iteration, deep visibility, and scalable growth across our SaaS portfolio.

This is a hands-on role for a technical builder who’s excited to solve high-leverage challenges, prototype experimental tools, and contribute meaningfully to our engineering culture. You’ll work alongside a small, senior team and collaborate closely with product, data, and AI functions.

What You’ll Do :

  • Build Core Infrastructure : Design and develop internal tools, APIs, and agents that integrate data, systems, and workflows across our SaaS group.
  • Prototype with Purpose : Quickly turn high-level ideas into working products and iterate based on business feedback.
  • Engineer Growth Systems : Build tools that support GTM agents, automate workflows, and enable better decision-making at scale.
  • Collaborate Cross-Functionally : Work closely with product managers, data scientists, and AI engineers to deliver real business impact.
  • Integrate & Stitch Systems : Connect 3rd-party APIs and internal services via clean interfaces and stateful pipelines.
  • Champion Code Quality : Write clean, maintainable, well-tested code while mentoring others on engineering best practices.

What We’re Looking For :

  • 4+ years of experience building backend systems, AI agents, APIs, or infrastructure in modern programming languages (Python, Ruby-on-Rails, TypeScript, Go, etc.)
  • Comfortable working in fast-paced environments with shifting priorities and high autonomy
  • Experience building integrations , internal tools , or platform services
  • Strong product sense : you care about what you’re building and how it helps the business
  • Solid understanding of system design, async workflows, and cloud infrastructure (bonus : experience with agent-based architectures or state machines)
  • Enthusiastic about learning, growing, and collaborating across disciplines
  • Why This Role?

  • Join an elite founding engineering team with massive ownership and impact
  • Build real systems used across a portfolio of profitable SaaS companies
  • Work at the frontier of product, data, AI, and growth — all in one environment
  • Help shape the culture and direction of a fast-moving, well-funded platform business
  • Let’s Build

    If you’re excited by the idea of building from 0→1, solving real-world problems, and shaping a world-class engineering org — we’d love to hear from you.

    Apply now or reach out for an informal chat.

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    Senior Software Engineer • London Area, United Kingdom, United Kingdom