---
title: 'Senior or Staff Software Engineer, SRE/ Platform Team at OneSignal'
canonical: 'https://feeny.ai/job/senior-or-staff-software-engineer-sre-platform-team-onesignal-united-kingdom-y4zbvfjk40ab'
type: 'job'
last_seen: '2026-09-09'
---

# Senior or Staff Software Engineer, SRE/ Platform Team at OneSignal

- **Company:** OneSignal
- **Location:** United Kingdom
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-05-08
- **Last confirmed live:** 2026-09-09
- **Apply:** https://jobs.gem.com/onesignal/am9icG9zdDoN8Jj1GjaFmNgF0yx4xT2v

## Job description

About The Team: We have grown rapidly to where we are today, serving billions of HTTP requests daily. We achieved this scale by writing scale-sensitive components in languages like Rust and Go. This potent combination of high performance with efficient resource utilization has given us an incredible competitive edge.

We are seeking a Platform Engineer to join our team and help us scale by managing and developing the next generation of our infrastructure. While we currently maintain a 99.95% uptime, we are dedicated to sustaining this level of reliability as our product and business expand.

In this role, your core responsibility will be software engineering with a specialized focus on operations, infrastructure, and automation. You will develop the systems that power our product, enhance internal services, and provide architectural guidance to product teams to ensure optimal service operability.

You will leverage Kubernetes to automate data center functions and create services that streamline database operations. A major aspect of this position is gaining a deep enough understanding of our systems to move beyond manual intervention and build sophisticated software solutions that fully automate these processes.

What You'll Do:

- Optimize and Elevate Performance: Identify bottlenecks in our systems and unleash your creativity to introduce cutting-edge optimizations. You'll have the chance to improve the performance of our databases and evaluate innovative storage technologies that will elevate our infrastructure to new heights.
- Forge Infrastructure as Code: Take the lead in setting up robust infrastructure and configuration-as-code with Kubernetes and Terraform. You'll be at the forefront of shaping our foundational architecture, ensuring it’s both resilient and scalable.
- Drive Observability and Monitoring: Establish and maintain a state-of-the-art observability and monitoring stack. Your insights will enable us to stay ahead of potential issues, ensuring our services remain reliable and performant.
- Craft the Golden Path for CI/CD: Define and implement best practices for continuous integration and deployment. Your work will streamline the deployment process for our engineering teams, allowing them to roll out new features swiftly and safely.
- Collaborate Across Teams: Work closely with engineering teams to architect highly scalable, observable services. Your collaboration will be essential in creating a cohesive and efficient development environment.
- Be a Key Player in Incident Response: Join the on-call rotation and play a crucial role in maintaining our systems' health. Your expertise will be vital in troubleshooting and resolving issues, ensuring our services always meet the highest standards.

What you'll bring:

- At least 8 years of platform experience
- Experience operating reliable production systems at scale
- Knowledge of Linux systems internals
- Desire and ability to automate tasks
- Experience managing PostgreSQL for high-scale throughput systems, or similar experience with other relevant SQL datastores.
- Operational experience deploying and managing Kubernetes
- Experience working with Cloud Providers (AWS/GCP/Azure)

We value a variety of experiences, so these are not required. It would be an added bonus if you have experience in any of the following:

- Recently writing Go and/or Rust
- Working with ScyllaDB
- Redis, Kafka, etcd, Clickhouse, Kubernetes

The base salary in UK for a Senior Software Engineer full-time position is between GBP 100,000 and GBP 125,000, and for the Staff level is GBP 125,000 and GBP 145,000. Your exact starting salary is determined by a number of factors such as your experience, skills, and qualifications. In addition to base salary, we also offer a competitive equity program and comprehensive and inclusive benefits.

## About OneSignal

## Company Overview
- **One-liner**: OneSignal is a customer engagement platform that enables businesses to send personalized, omnichannel messages (push, email, SMS/RCS, in-app) to drive activation, retention, and revenue.
- **Entity Type**: Private (Series C)
- **Headquarters**: San Mateo, California, USA (with offices in New York, London, and a shared workspace in Singapore)
- **Founded**: 2011
- **Founders**: George Deglin (Co-Founder & CEO) and Long Vo (Co-Founder & COO)

## Core Business
- **Primary industry**: Customer engagement / Marketing technology (MarTech)
- **Target customers**: B2B – from SMBs to large enterprises; over 1 million businesses use the platform
- **Mission**: “Democratize customer engagement for all businesses around the world”

## Products & Services
- **OneSignal Platform**: Unified omnichannel orchestration hub for mobile push, web push, email, SMS/RCS, in-app messaging, and Live Activities. Includes segmentation, real-time behavioral triggers, journey automation, and analytics.
- **OneSignal AI**: In-product AI agent that generates message copy, designs emails, analyzes performance, and recommends next steps; can create and analyze multi-step Journeys.
- **SDKs & APIs**: Fast integration with Android, iOS, Flutter, React Native, Expo, Unity, and more. Connects to analytics, CDP, warehouse, and CRM tools.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Total funding of $84.2M over 7 rounds (latest Series C in February 2023)
- **Notable Investors/Partners**: SignalFire, Y Combinator, HubSpot; 14 institutional investors and 1 angel investor
- **Growth Signals**:
  - Serves over 1 million businesses and sends 12 billion messages daily
  - Headcount of 171 as of June 2026 (Tracxn)
  - Recognitions: Great Place to Work® Certified, Fortune 100 Best Companies to Work For®, Deloitte Technology Fast 500™, G2 Leader 2026
  - Compliance: SOC 2 Type 2, ISO 27001, GDPR

## Competitive Advantages
- **Omnichannel orchestration** from a single dashboard with consistent brand voice
- **Fast integration** (SDKs and APIs ready in hours) and AI-powered automation
- **Enterprise-grade security and compliance** (SOC 2, ISO 27001, GDPR, regional data residency)
- **Scalable architecture** handling billions of messages daily for businesses of all sizes
- **Strong developer community** and extensive integration ecosystem

## Strategic Focus
- **Democratizing customer engagement** by making enterprise-grade tools accessible to all businesses
- **AI-first innovation** (OneSignal AI) to reduce manual work and improve campaign performance
- **Expanding omnichannel reach** (e.g., RCS, Live Activities) and deepening integrations with analytics/CDP/CRM platforms
- **Maintaining a remote-first, flexible work culture** while growing globally

## Why Work Here
- **Work flexibility**: Fully remote and hybrid options; no-meeting Wednesdays for deep focus; results-oriented culture
- **Perks**: Home office and wellness stipend, learning & development stipend
- **Culture**: Values include customer-first, ownership, transparency, collaboration with empathy, and continuous learning
- **Diversity & Inclusion**: Committed to creating an inclusive environment where employees bring their authentic selves
- **Awards**: Great Place to Work® Certified, Fortune 100 Best Companies to Work For®
- **Locations**: San Mateo (HQ), New York, London, and Singapore (shared workspace)

## Sources
1. [onesignal.com/careers](https://onesignal.com/careers)
2. [onesignal.com](https://onesignal.com/)
3. [onesignal.com/about](https://onesignal.com/about)
4. [ycombinator.com/companies/onesignal](https://www.ycombinator.com/companies/onesignal)
5. [tracxn.com/d/companies/onesignal](https://tracxn.com/d/companies/onesignal/__m5ycJzS7z96DPQZYdUsN2ifGGab0KTqN-m99zO8jMKA)

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