---
title: 'Senior Software Engineer - Full Stack - Portal Platform at Abnormal'
canonical: 'https://feeny.ai/job/senior-software-engineer-full-stack-portal-platform-abnormal-united-kingdom-ds8cdjspa6j4'
type: 'job'
last_seen: '2026-11-06'
---

# Senior Software Engineer - Full Stack - Portal Platform at Abnormal

- **Company:** Abnormal
- **Location:** United Kingdom
- **Work type:** remote
- **Posted:** 2026-11-03
- **Last confirmed live:** 2026-11-06
- **Apply:** https://abnormal.ai/careers/jobs/8107873003?gh_jid=8107873003

## Job description

## About the Role

Abnormal AI is looking for a Software Engineer to join the Portal Platform team.

Our team’s mission is to uplevel the architecture across our different portals here at Abnormal:

- Customer Portal -  a gateway our customers use to interact with Abnormal
- End User portal - functionality for the users inside the companies that have purchased our product
- Demo portal - a tool to help showcase different combinations of our product by GTM teams

Main themes include helping reach and maintain enterprise grade stability, security & usability for our customers while enabling application teams to easily develop & deploy their frontend components utilising AI-driven workflows.

This role offers an exciting opportunity to join an AI-native company. You will own truly impactful, platform-level work, driving cross-functional influence that spans across product development and enabling our go-to-market teams.

You'll join a team of experienced engineers, collaborating with them to design components &  drive execution. The ideal candidate is comfortable working with a distributed team & has worked in a full-stack capacity before in enterprise environments.

## What you will do

- Design and execute platform-level software projects from conception through launch, collaborating with senior engineers across the organization.
- Build and maintain backend services and APIs that power our portal experiences
- Build reusable frontend libraries, design systems, and developer tooling that accelerate feature delivery across product teams
- Own infrastructure concerns, including CI/CD pipelines, deployment automation, and observability for portal applications.
- Drive frontend performance, accessibility, and quality standards across our portal applications.
- Raise the bar of excellence in engineering, actively contributing to knowledge sharing within the team, and participating in professional development activities.
- Provide guidance and mentorship for junior members of the team
- Help accelerate the teams with their changes across different realms of front-end development

Must Haves

- 6+ years of experience as a software engineer, with a track record of owning and delivering complex, cross-team projects end-to-end
- Deep expertise in React and modern frontend architecture (state management, performance tuning, build tooling, design systems)
- Strong backend proficiency in Python (Django) or TypeScript, with experience designing APIs and data models for scale
- Experience with cloud infrastructure (AWS, Kubernetes, CI/CD) and comfort operating production systems
- Demonstrated ability to influence technical direction — you've driven RFCs, architecture decisions, or platform migrations
- Experience mentoring engineers and raising the technical bar through code reviews, documentation, and knowledge sharing
- Strong communication skills, especially in distributed/async environments — you write clearly and proactively
- Proven ability to balance technical debt with feature delivery at the platform level
- You’re growth driven looking to increase impact and responsibility over time
- Strong fundamentals in computer science, data structures, and performance optimization.
- BS degree in Computer Science, Applied Sciences, Information Systems or other related engineering field

## Nice to Have

- Familiarity with our stack (AWS, K8, Python/Django, React, Postgres)
- Experience and eagerness to leverage AI development tools
- Experience with large scale web frontend applications
- Experience with front end build tools
- Experience with micro-frontend architecture patterns
- Experience with web security (eg. OWASP top 10)

## #LI-NT1

A note on AI in our process: Abnormal AI uses AI-assisted tools to help our recruiting team prepare for candidate interviews. These tools analyze resume content and role requirements to suggest interview questions and areas for the interviewer to explore.They do not make hiring decisions or screen candidates automatically. Every decision about a candidacy is made by a person. Further, if your application is successful and Abnormal AI makes a conditional offer of employment, we will carry out pre-employment checks which must be successfully completed to progress to a final offer. All processes and pre-employment checks are in line with prevailing legislation and Abnormal AI's policies relevant to our security and privacy standards.

Abnormal AI is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected veteran status or other characteristics protected by law. For our EEO policy statement please [click here](https://assets.contentstack.io/v3/assets/blt3a076cfd9753fa1f/blt9cbda641db7c0045/6a1e3d3a66aea075cd33e462/AAP_and_EEO_Statement.pdf). If you would like more information on your EEO rights under the law, please [click here](https://assets.contentstack.io/v3/assets/blt3a076cfd9753fa1f/blt4eb3a265cc7b1ca9/6a1e3d3bfe33e73c16ff026b/EEOC_Know_Your_Rights_Oct_30_2025.pdf).

## About Abnormal

## Company Overview
- **One-liner**: Abnormal Security uses behavioral AI to autonomously detect and stop sophisticated email attacks, account takeovers, and insider threats for enterprises.
- **Entity Type**: Private (Series D)
- **Headquarters**: San Francisco, California, USA
- **Founded**: 2018
- **Founders**: Evan Reiser (CEO) and Sanjay Jeyakumar (CTO)

## Core Business
- **Primary industry**: Cybersecurity (Cloud Email Security, Identity Security, AI Security)
- **Target customers**: B2B, Enterprise (over 25% of the Fortune 500)
- **Mission statement**: "Stop crime with AI and bring cybersecurity from the future to defenders today."

## Products & Services
- **Abnormal Behavioral Security Platform**: An AI-native, cloud-based platform that builds behavioral baselines for every user and entity in an organization to detect anomalies that indicate attacks.
  - **Email Security**: Autonomous detection and remediation of BEC, phishing, and account takeover attacks via API-based, cloud-native architecture. Deploys in 60 seconds with no MX changes.
  - **Identity Security**: Harden identities, detect compromise, and prevent insider threats by analyzing behavioral signals in real-time.
  - **Insider Threat**: Blocks fraudulent actors and malicious insiders by autonomously addressing anomalies.
  - **AI Security (Attune AI)**: Provides visibility and policy enforcement for all AI tools used within an organization, enabling AI governance.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (last reported Series D valuation was $2.6B in 2022)
- **Key Metric**: Over 25% of the Fortune 500 are customers. The company has stopped millions of attacks and saved billions in financial losses.
- **Notable Investors/Partners**: Insight Partners, Greylock Partners, Menlo Ventures, CrowdStrike Falcon Fund (strategic investor)
- **Growth Signals**: The company is AI-native from day one, with revenue growing rapidly. It is expanding its platform from email security into identity, insider threat, and AI governance. Headcount has grown significantly, and the company continues to hire across engineering, GTM, and operations.

## Competitive Advantages
- **Behavioral AI Moat**: Unlike signature-based or rules-based security tools, Abnormal builds a unique behavioral baseline for every organization and user. This allows it to detect novel attacks that no other vendor sees.
- **AI-Native Operations**: The company doesn't just build AI products—it runs its entire business (product, CS, finance, HR) with AI agents, compounding its speed of innovation.
- **Deep Enterprise Trust**: Over 25% of the Fortune 500 give Abnormal the authority to autonomously make security decisions, a level of trust very few vendors achieve.
- **Founding Team Origins**: Founders came from adtech (building anomaly-detection AI at scale) rather than traditional cybersecurity, giving them an outsider's perspective that led to the behavioral AI approach.

## Strategic Focus
- **Platform Expansion**: Moving beyond email security into identity, insider threat, and AI security, building a unified behavioral security platform.
- **AI-First Product Development**: Using AI agents to compress product development cycles from quarters to weeks, rapidly launching new products.
- **Operational Efficiency**: Embedding AI across every internal function to drive automation and efficiency, allowing the company to scale without linear headcount growth.
- **Market Leadership**: Capitalizing on the wave of AI-generated attacks to position behavioral AI as the only viable defense.

## Why Work Here
- **Remote-First Culture**: From day one, Abnormal has been remote-first. Employees have the choice to work from home, from hub offices, or from co-working spaces (WeWork). Async work is the default, with deliberate synchronous overlap time. [abnormal.ai](https://abnormal.ai/careers/culture)
- **High Autonomy, High Accountability**: No micromanagement. Clear expectations. Growth is based on impact, not tenure or title. "You don't wait your turn." [abnormal.ai](https://abnormal.ai/careers/culture)
- **AI-Native Work Environment**: Every employee, regardless of role, gets access to the best AI tools and is expected to use them. The company rebuilds work processes around what AI makes possible—not by bolting AI onto old workflows. [abnormal.ai](https://abnormal.ai/careers/culture)
- **Compressed Growth Timeline**: Because everything moves fast with AI, impact that would take quarters elsewhere happens in weeks. One person can do what used to take a team. Outsized impact is rewarded proportionally. [abnormal.ai](https://abnormal.ai/careers/culture)
- **Transparent and Direct Culture**: "We say what's true, even when it's uncomfortable." Leaders are accessible, teams share learnings openly, and new hires get real ownership immediately. [abnormal.ai](https://abnormal.ai/about)
- **Notable Perks**: Compensation is tied to impact, not role. The company offers flexibility as infrastructure, not a benefit. Employees see direct results from their work in a fast-growing, mission-driven company.

## Sources
1. [Abnormal AI - Official Website](https://abnormal.ai/)
2. [Abnormal AI - About Page](https://abnormal.ai/about)
3. [Abnormal AI - Careers & Culture](https://abnormal.ai/careers/culture)
4. [Abnormal AI - Open Roles](https://abnormal.ai/careers/open-roles)
5. [Abnormal AI - What We Are](https://abnormal.ai/about/what-we-are)
6. [Crunchbase - Abnormal Security](https://www.crunchbase.com/organization/abnormalsecurity)
7. [PitchBook - Abnormal Security](https://pitchbook.com/profiles/abnormal-security-168693-47)

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