Backend Engineer

MyJunior AI; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Private health insurance

Gym membership (Third Space)

Dinner when working late

Frequent offsites

Job summary

A tech-focused firm in London is looking for a back-end/data engineer as their first dedicated engineering hire. This role involves designing and building an AI-first tech stack and developing internal tools to streamline operations. Ideal candidates will have strong communication skills and experience with PostgreSQL and various data platforms. Benefits include private health insurance, gym membership, and frequent offsite events.

Qualifications

• Experience leading projects end-to-end, self-directed.
• Ability to translate layman's terms into technical requirements.
• Interest in commercial tech stack for efficiency.
• Interest and/or experience in our commercial tech stack: Notion, Slack, Retool, Amplitude, Stripe.
• Proficient in PostgreSQL and data platforms (Snowflake/BigQuery/Databricks/Firebolt).
• Experience with our product stack (Node.js & Typescript) preferred.
• Start-up experience and ability to thrive in fast-paced environments.
• Bonus: experience building AI-powered products.

Responsibilities

• Design and build AI-first tech stack.
• Develop data warehouse and internal data architecture.
• Automate data pipelines and alert systems.
• Work on projects involving LLMs, agents and automation.
• Shape our engineering culture.

Skills

Back-end engineering

Data engineering

Strong communication skills

PostgreSQL

Experience with Node.js and Typescript

Tools

Notion

Slack

Retool

Amplitude

Stripe

Snowflake

BigQuery

Notion

Slack

Retool

Amplitude

Stripe

Job description

👶 About Junior

We’re building cutting-edge LLM-powered tools to supercharge the investment research process for private market investors. Our clients include several of the world’s top 10 private equity and consulting firms, and are responsible for investing billions of dollars annually. We’re a profitable, bootstrapped company with a growing team of 24 based in London and NYC. We 10x’d our revenue in 2025.

You can read more about the company mission & values here.

💡 Role Description

As our first engineering hire entirely focused on our internal go-to-market and operations stack, you'll have the unique opportunity to:

• Design and build a start-up’s tech stack to be AI-first from the ground up; contribute to infra decisions, direction and prioritization

• Ship internal tools quickly and get immediate feedback from your colleagues (they will quickly become your biggest fans!)

• Develop and own our data warehouse and internal data architecture

• Work on groundbreaking projects involving LLMs, agents and automation

• Shape our engineering culture

🔧 Sample set of projects

• User Health Reporting + CRM Data Quality: automate data pipelines to feed metrics into BI dashboards / ML evals (e.g. usage, demos, feedback) and build alert systems to flag risk signals (e.g. usage drop, feedback spike). Ensure we have accurate usage and profile data across our customers.

• User Feedback —> Product Development pipeline: build a tool that takes summaries of feedback calls with users, evaluates priority feedback items / feature requests and then shares them with our Product team.

• Billing / Invoicing: implement complicated B2B pricing models, involving combination of usage-based, seat-based and platform fees in a single invoice. Automate as much of the financial reconciliation and reporting process as possible!

• Building data warehouse and reporting → build data warehouse to integrate our product database, crm data and operations / finance data → generate team-specific dashboards from data

🔥 About You

We're looking for a back-end / data engineers who like building internal tools and helping their commercial team colleagues work 10x faster:

• Based in London, in our Farringdon office 5 days / week

• Have experience leading projects end-to-end and are self-directed, comfortable reporting into several senior stakeholders

• Have strong communication skills, with experience translating ‘laymen speak’ into technical requirements

• Has interest and/or experience in our commercial tech stack: Notion, Slack, Retool, Amplitude, Stripe

  • Sales, Finance, Ops, Customer Success will be relying on you to make them more efficient / AI-enabled

• Proficient in PostgreSQL and one or more of the data platforms (Snowflake, BigQuery, Databricks, Firebolt, etc.)

  • Experience with our product stack (Node.js & Typescript) preferred

• Feel like you are never building fast enough. You have start-up experience and thrive in fast-paced, chaotic environments

• Bonus points for experience building & designing AI-powered products!

🌵Benefits

• Private health insurance

• Gym membership (Third Space)

• Dinner when working late

• Frequent offsites (recent offsites include Crete, Greece; upstate New York, USA; Cancun, Mexico)

📩 How to Apply

If you're excited about the opportunity to drive innovation at Junior, we'd love to hear from you! Email us at [e-mail] with your resume and a brief introduction. We can't wait to meet you! 🙌