Senior Software Engineer - Full Stack - Portal Platform

Abnormal AI; United Kingdom; On-site; GBP 90,000 - 130,000; Full time

Job summary

Abnormal AI is seeking a Software Engineer to join the Portal Platform team in the UK. You will own platform-level work spanning frontend libraries, design systems, APIs, and infrastructure, driving enterprise-grade stability, security, and usability.

Collaborate across product and GTM teams in a distributed setup. The ideal candidate has 6+ years of full-stack experience with React, Python/Django or TypeScript, and cloud infrastructure.

Qualifications

• 6+ years as a software engineer delivering cross-team projects end-to-end.
• Deep expertise in React and modern frontend architecture.
• Backend proficiency in Python (Django) or TypeScript with API design.
• Experience with cloud infrastructure (AWS, Kubernetes) and production systems.
• Influenced RFCs, architecture decisions, or platform migrations.
• Mentors engineers and raises the technical bar via reviews and docs.
• Strong communication in distributed/async environments.
• Balances technical debt with feature delivery at platform level.
• Growth-driven with increasing impact over time.
• Solid CS fundamentals and performance optimization.

Responsibilities

• Design and execute platform-level software projects from conception through launch.
• Build and maintain backend services and APIs powering portal experiences.
• Create reusable frontend libraries, design systems, and tooling to accelerate delivery.
• Own infrastructure concerns including CI/CD, deployment automation, and observability.
• Drive frontend performance and accessibility standards across portals.
• Share knowledge and contribute to engineering best practices.
• Provide guidance and mentorship to junior teammates.
• Accelerate teams across various front-end domains.

Skills

React

Frontend architecture

Python

Django

TypeScript

APIs design

Data models

AWS

Kubernetes

CI/CD

Mentoring

Distributed teamwork

CS fundamentals

Education

BS in Computer Science or related

Tools

AWS

Kubernetes

PostgreSQL

CI/CD pipelines

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. If you would like more information on your EOO rights under the law, please click here.