Junior
Senior Backend Engineer - London
5mo ago
100000 –130000 / yearEuropeSeniorllmvector searchasync task queuesapibackend architectureautomationcrmdata pipelines
Build and scale backend systems that power AI-driven research products for private market investors.
Requirements
- We’re looking for a Backend Engineer who enjoys building systems that make a company run better.
- You might be a good fit if you:
- Are based in London and excited to work from our Farringdon office (5 days/week)
- Have experience owning technical projects end-to-end , from architecture through production
- Are excited by the intersection of AI infrastructure, financial systems, and backend engineering
- Enjoy translating business problems into clean technical systems and automation
- Have worked with PostgreSQL and care about data modelling, reliability, and system design
- Write production code in Python, or TypeScript
- Are comfortable building APIs, internal tools, workflows, and infrastructure that support real customers
- Thrive in fast-moving startup environments and enjoy shipping quickly while maintaining strong engineering standards
Nice to have
- Billing, payments, usage-based pricing, or financial workflows
- Internal infrastructure / dev tools at startups
- Data pipelines, workflow orchestration, or event-driven systems
- Retrieval, embeddings, or prompt orchestration
Other
- We’re building cutting-edge LLM-powered workflow tools to supercharge investment research for private market investors. Our clients include most of the global top 10 private equity and consulting firms - Junior already powers hundreds of billions of dollars invested annually. We’re a profitable, bootstrapped company with a growing team of 40+ based in London, NYC and Sydney. We 10x’d our revenue in 2025.
- You can read more about the company mission & values here .
- You’ll build and scale the systems that power our AI-driven research products and enable our operations / sales teams to deliver our product as efficiently as possible. This is a systems-level role - ideal for engineers who love thinking about data flows, orchestration, and performance across complex distributed systems.
- You’ll have the opportunity to:
- Ship quickly
- Architect and scale backend systems that support high-throughput LLM interactions, vector search, and multi-agent orchestration.
- Stitch together AI infrastructure across model providers, data stores, and internal APIs to create cohesive, performant systems.
- Prototype new backend capabilities (retrieval pipelines, caching layers, async task queues) that let us build faster and smarter
- Own the architecture of internal data systems and pipelines
- Build automation and integrations across product, CRM, and financial systems
- Help shape engineering culture and internal infrastructure decisions
- Top 1% traction: 0-20+ m rev in 3 years, fully bootstrapped / profitable, top-tier customers inc. some of MBB, Big 4, Top 5 PE mega-funds
- Flat org structure: lean startup environment – every engineer reports directly to the CTO / co-founder
- Competitive salary + equity and first-class benefits inc: Lunch + dinner provided in-office
- Third Space membership
- Private health insurance
- Multiple all-expense paid offsites per year (last 3 trips include Crete, Greece; Cancun, Mexico; Barcelona, Spain)
- Visa sponsorship available