Mid/Senior Software Engineer

PortF is building tools that help private equity and debt investors automate portfolio monitoring, valuations, and reporting.

We’re a small team with a big opportunity – to change how billions in capital are managed by replacing spreadsheets and PDFs with smarter, more connected workflows.

Funds managing billions already use PortF. If you want to help rethink how financial systems work – fast, hands‑on, and with real ownership – we’d love to chat.

The role

• We’re looking for a Software Engineer who loves to build.
• You’ll work across our stack (React, TypeScript, Node, Postgres, AWS), owning features end‑to‑end – from designing data models to polishing UX flows. You’ll help shape our architecture as we scale, and you’ll be trusted to ship quickly and responsibly.
• We’re an in‑person‑first team based in London because speed and collaboration matter the most. Three days a week min.

You might be a fit if you:

• Have 5+ years of experience building production web apps in React + TypeScript.
• Are comfortable across the stack.
• Have worked with AWS or similar cloud infrastructure.
• Take ownership – you care about impact.
• Are curious about AI, automation, and code‑assist tools (you’ve used Cursor, Copilot, or similar).
• Move fast, test properly, and can think like a product person.
• Love to work in a startup environment.
• Are excited to work in our central London office (mostly).
• Thrive in small, high‑energy teams where decisions happen quickly.
• Experience with Postgres, Prisma, GraphQL, or Next.js.
• Exposure to LangChain / LangGraph / AI‑driven workflows.
• You’ve built something end‑to‑end on your own (a side project, startup, or open source).

What you’ll do

• Build and scale core product features – some from 0→1 (like AI agents and event‑driven workflow automation), others scaling existing systems as we grow.
• Work closely with the founders on product direction and trade‑offs.
• Help refine our architecture as we scale multi‑tenant AI‑driven systems.
• Ship to production fast.
• Experiment with AI tools to accelerate how we build.
• Build real, complex products used by leading investors.
• Work with a small, elite team who care deeply about craft and velocity.
• Be part of an early team where your work genuinely moves the company.

Seniority level: Mid‑Senior.

Employment type: Full‑time.

Job function: Engineering and Information Technology.

Referrals increase your chances of interviewing at PortF by 2x.

London, England, United Kingdom.

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