Back End Developer

Ncounter Technology Recruitment; London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading tech recruitment firm in London seeks a Product-Focused Backend Engineer to develop and scale APIs for AI infrastructure. Responsibilities include collaborating with product teams to deliver solutions, with a focus on ownership and innovation in functional programming environments. Ideal candidates have strong backgrounds in distributed systems and cloud technologies.

Qualifications

• Hands-on experience with functional programming languages.
• Proven track record of scaling distributed systems.
• Solid understanding of infrastructure-as-code.

Responsibilities

• Building and evolving APIs for internal and customer-facing applications.
• Scaling the platform for high-throughput AI workloads.
• Shipping to production daily in collaboration with Product and Design.

Skills

Functional programming

Building distributed backend systems

Infrastructure-as-code

Cloud orchestration (AWS, Terraform, Docker)

Queue management

Observability tooling

GenAI and prompt engineering

Job description

Overview

Product-Focused Backend Engineer – Functional Programming & Distributed Systems

At Ncounter, we’re partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision.

As a Backend Engineer, you’ll join a growing team working at the forefront of AI infrastructure. This isn’t just about clean code or strong delivery - it’s about ownership, product intuition, and building for scale. You’ll be part of a lean, high-calibre engineering function where every member contributes to planning, testing, analysis, and execution.

What You’ll Be Doing

• Building and evolving APIs that serve as the backbone for internal systems and customer-facing applications
• Scaling the platform to support heavy, multi-tenant usage patterns and high-throughput AI workloads
• Applying foundation models (GPT-4.1, Claude 4, Gemini 1.5 and successors) to real-world, multi-modal data challenges
• Shipping to production daily in collaboration with Product and Design to solve real user problems
• Playing an active role in shaping team goals, defining technical metrics, and prioritising outcomes over ticket-chasing

Your Background

• Hands-on experience with functional programming (Elixir is a plus, but other languages like Scala, Haskell, Clojure, Go, Node.js, or F# are welcome)
• Proven track record of building and scaling distributed backend systems
• Solid understanding of infrastructure-as-code and cloud orchestration (AWS, Terraform, Docker)
• Familiarity with queue management, observability tooling, and shipping in fast-paced environments
• Awareness of GenAI and prompt engineering, or a keen interest to develop expertise in this area
• A self-starter attitude, with a strong sense of product ownership and a passion for solving end-user challenges

Seniority level

• Not Applicable

Employment type

• Full-time

Job function

• Finance, Engineering, and Information Technology

Industries

• Technology, Information and Media, Computers and Electronics Manufacturing, and Financial Services

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