Senior Backend Developer (.NET | AI-First SaaS Platform)

Keepnet

Sheffield, UK

3 months ago

Role details

Contract type

Permanent contract

Employment type

Full-time (> 32 hours)

Experience level

Expert

Experience required

8 years minimum

Working hours

Regular working hours

Job source

find.jobs

Tech stack

.NET Framework Multitier Architecture Application Programming Interfaces (APIs) Agile Methodology Artificial Intelligence Microsoft Azure Software as a Service Continuous Integration Cursor (Graphical User Interface Elements) Software Debugging DevOps Distributed Systems

+13 more

PostgreSQL NoSQL Systems Development Life Cycle Queueing Systems SQL Databases Data Logging Cloud Platform System Caching Backend Sentry Front End Software Development Api Design Code Restructuring

Job description

Design, build, and maintain scalable backend services for Keepnet’s Human Risk Management platform.
Build clean, modular APIs that integrate internal services and third-party systems to enable automation, reporting, and security workflows.
Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD.
Own the full development lifecycle: design, implementation, CI/CD (Azure), and post-release monitoring.
Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows.
Use observability signals (logging, metrics, tracing, tools like Sentry) to proactively detect, diagnose, and prevent production issues.
Collaborate closely with frontend, product, and customer-facing teams to deliver features that solve real customer problems.
Participate in Agile ways of working, focused on iteration, ownership, and continuous improvement., * Thoughtful Engineering: Time and space to design systems properly, not just ship quickly.
Global Context: Work on a multinational SaaS platform used across multiple regions.
AI-First Environment: AI-assisted development and production-grade AI systems are part of everyday work.
Annual Leave: 25 days (+1 per year of service).
Health & Well-being: Gym support and cycle-to-work scheme.
Team Culture: Monthly team lunches and quarterly offsites.
Continuous Learning: Learn from experienced peers and grow your skills over time.

Requirements

8+ years of experience building backend systems with .NET.
Strong understanding of API design, distributed systems, and asynchronous architectures.
Experience with SQL and NoSQL databases (PostgreSQL preferred), caching, and queuing systems.
Familiarity with cloud environments and DevOps practices (Azure preferred).
Comfortable working on production SaaS platforms, with ownership beyond deployment.
Experience using AI-assisted development tools (e.g. Cursor or similar) to support code exploration, refactoring, testing, or design discussions-while maintaining strong engineering judgment.
A strong sense of ownership and production accountability, including monitoring, debugging, and continuous improvement.
Ability to understand product and business context, making pragmatic technical decisions that balance user value, risk, and long-term goals.
A security-conscious mindset, building systems that are secure by design.