Senior Backend Engineer — AI-Driven Data Platform

Beqom; Manchester; On-site; GBP 90,000 - 140,000; Full time

Job summary

beqom is hiring a Senior Backend Engineer for our Data Platform Core team. You will own multi-tenant data services, including ingestion, schema management, and exports, using .NET 8/C#, PostgreSQL, and AI-driven development practices.

You will collaborate with analytics, support, and product stakeholders to push high-quality data solutions. You will engineer features, optimize performance, and contribute to agentic tooling while mentoring peers.

Qualifications

• Demonstrated senior-level experience building production backend services with .NET/C#.
• Strong SQL and PostgreSQL skills: schema design and query optimisation.
• Proven performance and memory awareness - streaming vs. buffering, profiling and load-testing skills.
• Track record of shipping features that are complete and stable, backed by strong test discipline.
• Experience with multi-tenant SaaS architectures.
• Deep, daily experience with AI-driven development - Claude Code strongly preferred - including multi-agent orchestration, building custom skills and sub-agents, and structuring codebases and context for effective agent work.
• Experience turning requirements into precise, agent-executable specifications, and reviewing AI output at the feature level: spotting hallucinations, architectural drift, and security issues.
• Excellent written communication: design docs, specifications, PR descriptions, and commit history that both humans and agents can act on.

Responsibilities

• Design and build features across multi-tenant data platform services: data ingestion, schema management, effective dating, snapshots, calculated fields, and exports.
• Work hands-on with .NET 8/C#, PostgreSQL, EF Core, Dapper, MediatR (CQRS), and RabbitMQ (MassTransit) event-driven workflows.
• Optimise performance-critical paths: bulk ingestion, large data exports, memory-efficient streaming, and complex SQL.
• Deliver most of your output through AI agents: decompose features into well-structured specifications, run parallel agent sessions, and review outcomes critically before they ship.
• Build and maintain the team’s agentic tooling: custom Claude Code skills and sub-agents, MCP tools exposing internal APIs, prompt/context conventions, and automated review pipelines.
• Design the verification that makes agent speed safe: test strategy, quality gates, and evals that catch hallucinated APIs, subtle logic errors, and performance regressions in generated code.
• Investigate and resolve production data issues in collaboration with Support and Engineering.
• Maintain strong test coverage: unit and integration tests.
• Improve observability (OpenTelemetry) and operational stability.
• Document architecture decisions and write clear, actionable PRs and commit messages.
• Mentor other engineers - in backend craft and in effective agent-driven development - and raise the bar in code reviews.

Skills

Senior backend development

AI-driven development

Strong communication

Tools

.NET 8/C#

PostgreSQL

EF Core

Dapper

MediatR

RabbitMQ

MassTransit

Job description

beqom is hiring a Senior Backend Engineer for our Data Platform Core team. You will own multi-tenant data services, including ingestion, schema management, and exports, using .NET 8/C#, PostgreSQL, and AI-driven development practices.

You will collaborate with analytics, support, and product stakeholders to push high-quality data solutions. You will engineer features, optimize performance, and contribute to agentic tooling while mentoring peers.