Senior Full-Stack Engineer in London

ManholeMetrics is looking for an experienced Full-Stack Engineer to join their team as they scale their sewer and stormwater collection system monitoring solution across the US, Canada and UK.

Who you are

• You have strong skillset in full-stack development with the ability to identify problems and opportunities across the stack—and the initiative to solve them end-to-end.
• You are experienced with cloud infrastructure setup and scaling (ideally AWS), including VPCs, IaC (CDK), containerisation (Docker), orchestration (Kubernetes or managed alternatives), CI/CD (GitHub Actions), and observability (logs/metrics/traces).
• You are very comfortable with relational database usage, schema design and optimisation.
• You are highly proficient in Python and modern backend frameworks with solid experience designing RESTful APIs, GraphQL schemas, data models.
• You enjoy creating reproducible, repeatable make based workflows that increase Developer Experience.
• You have 3–5 years of industry experience with a proven track record of shipping reliable services to production and operating them at scale, following industry best practices and a strong belief in maintaining code quality.
• You have experience working with and shipping React/TypeScript projects.
• You care deeply about security, reliability, and cost efficiency—familiar with least-privilege access, secrets management, SSL/TLS, and compliance-minded logging.
• You have a portfolio you’re proud of (e.g. deployed services, internal platforms, open-source repos).
• You’re excited to learn and apply new languages, frameworks, and tools to create real-world solutions.
• You’re a pragmatic problem-solver who employs design thinking, values sound engineering principles, and pays close attention to detail.
• You enjoy multi-faceted exposure to work-streams in IoT, sensor technology, networking, embedded systems, app development, firmware.
• You can follow data from an IoT device modem broadcast through to a cloud hosted database.
• You communicate clearly—translating client needs into robust engineering solutions and explaining complex concepts to non-technical stakeholders.
• You thrive in a small, diverse team, excel under pressure, and proactively step into new challenges—start-up dynamism suits you.
• You’re an ecowarrior at heart—motivated by building technology that combats climate change and delivers measurable societal impact.
• You have the right to work in the UK or a visa with at least 6 months remaining (we can sponsor a Skilled Worker visa post-probation).
• You are London-based or willing to relocate to London and are happy to commute 3+ days/week to our Vauxhall-based office (Edinburgh House Workspace office).
• IoT networking experience (HTTPS/MQTT) and binary payload handling (e.g. Protocol Buffers).
• Automated testing at multiple layers (unit, contract, integration, end-to-end) and tools like PyTest, Cypress (for UI).
• Experience with mobile (React Native, Expo) or frontend (React/TypeScript).
• DevOps/Cybersecurity exposure (threat modelling, secrets, RBAC, audit trails).
• Low-level systems familiarity (embedded/firmware/C).
• Experience in tech-for-good and start-up/scale-up environments.
• You hold a degree in Computer Science, Software Engineering (or equivalent practical experience).

What the job involves

• Design and build reliable backend services and APIs that ingest, validate, and process IoT telemetry at scale (including parsing and modelling device data, e.g., Protocol Buffers → Pydantic -> Postgres).
• Being a core member of our migration team, migrating from a legacy MongoDB environment to a modern AWS hosted GraphQL and Postgres platform.
• Manage cloud infrastructure: set up and evolve secure, observable, cost-aware environments (VPCs, firewalls, SSL/TLS, IAM/RBAC), implement IaC (CDK), and streamline CI/CD for fast, safe deployments.
• Instrument the stack end-to-end (logs, metrics, traces) and improve reliability with SLOs, runbooks, and alerting; drive incident response and post-mortems.
• Collaborate across the stack with firmware, app, and frontend engineers to plan, produce, test, and deploy new capabilities (device backend dashboard).
• Automate and optimise workflows: testing, data pipelines, release processes, and developer tooling (including Gen AI) to boost team velocity and quality.
• Balance speed and quality, focusing on tangible outcomes while maintaining high engineering standards and documentation.
• Work shoulder-to-shoulder with the CEO and engineering team on system-level design and end-to-end architecture as we scale rapidly and robustly.

Compensation

• Share options.
• 31 days annual leave.
• Monthly team activity (think axe throwing & darts).
• Pension plan.
• Private AXA health insurance.
• Weekly team restaurant lunch.
• Late Uber home (past 9pm) policy.