Runna

Company Name: Runna
Job Title: Software Engineer, Full Stack (Mid)
Job Description: We're putting together a talented team to build the #1 training platform for Runners

We help everyday runners become outstanding by providing world-class training, coaching and community for everyone, whether you're improving your 5k time or training for your first marathon. To date we have built iOS, Android and Apple watch apps that help people achieve their goals by coaching them through the full journey and syncing to their favourite fitness devices.

We're growing extremely fast and in November 2023 closed a new £5M funding round led by JamJar with participation from Eka Ventures, Venrex and Creator Ventures. And in 2024, we were selected by Apple as one of three global finalists for the 2024 iPhone App of the Year reflecting the innovation and impact of what we've built.

We want to grow as fast as we can into the future and are looking for individuals who will help us get there. For more about our background and growth check out our Careers Page!

We're now looking ahead to the future and the people who want to help us build and scale Runna. Our aim is to reach millions of subscribers in the next 5 years and be the go-to training platform for any runner. Now is a magical time to join, we're still small, and everyone makes a foundational difference.

Who We're Looking For

We are looking for talented, creative and positive team players to join our highly-skilled Cross-Functional Engineering Team to help deliver new features for our iOS, Android and Apple watch applications and third-party integrations (Garmin, Strava, Coros, Fitbit Suuntu etc). You will work closely with our founders and CTO to help shape the future of Runna, who will support you all along this exciting journey.

As a Software Engineer, your role will include:

Architect, build, test and deliver new features across the full stack
Work with the Product team to identify the most suitable solution for the best customer experience
Always be on hand to help other team members when they need help on technical matters
Help us operate more efficiently, by building and maintaining our developer tooling and CI/CD pipeline
We rotate the responsibility of releases across each team member, so you will get the opportunity to lead the process and deploy changes to production

Requirements

What experience we're looking for

If you don't quite meet all of the below skills, we'd still love to hear from you as we might be able to tweak the role slightly or offer you a position better suited for you. You can apply directly below or contact us if you're still unsure.

Your key skills:

Strong TypeScript/JavaScript experience
Able to work in a highly skilled engineering team in a fast-paced, iterative environment
2+ years experience in your main expertise area (Frontend, Backend etc)
Comfortable picking up new things and working on technologies outside your comfort zone
Are skilled in delivering features end-to-end, from architecture design and building through to releasing, testing and supporting
Enthusiasm for our ways of working which include:
Iterative development, continuous deployment and test automation
Knowledge sharing, pair programming, collaborative design & development
Shared code ownership & cross-functional teams
Bonus points if you:

Are experienced in delivering features full-stack
Are experienced in Python or SwiftUI
Are experienced in deployment, releasing cycles or CI/CD
Have experience with React Native
Have experience with Serverless architectures
Have experience with AWS
Experience with Terraform or other IaC tooling (e.g. CDK, CloudFormation, etc.)
Have experience in open source contributions, including reporting bugs/issues in GitHub, testing new releases, or contributing to code
Have a strong interest in the health/fitness technologies

Our tech stack

Check out our tech radar here which we are constantly iterating, and below you can find a small reflection of our current tech stack:

Frontend:

React Native (iOS and Android)
Typescript
GraphQL (Apollo Client)
Fastlane
SwiftUI (Apple Watch)
Maestro E2E tests

Backend:

Serverless (AWS)
Lambdas (NodeJS & Python)
AWS AppSync
DynamoDB, S3, SQS, SNS, EventBridge, SageMaker
Postman API tests

All the other good stuff:

Sentry
GitHub Actions
Intercom, Mixpanel
RevenueCat
App Store Connect / Play Store
Figma

Software Engineer Interview Process

Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages:

Kick off! (apply below)
Getting to Know You + Live Coding (45-minute video call, first 25 mins will be an introductory chat followed by two live coding exercises from https://leetcode.com/)
Take home technical task (max 1-2 hours to complete, or if you have something interesting you recently built and would like to showcase then that's perfectly OK)
1.5-hour technical interview (the first half of the call will be used to discuss the take-home technical task from the previous stage and the second half will consist some general architecture/tech questions)
Meet the team (in-person chat with founder(s) and rest of the team)

Once the process is finished, we promise to let you know our decision as soon as possible.

Benefits

We offer a salary of £42,500 - £80,000 (depending on experience), plus equity in the form of Runna stock options.

Based on years of direct, relevant experience. Software Engineer I £42.5k, Software Engineer II £47.5-60k, Software Engineer III £60-80k

We'll be growing our package of benefits over time. We currently offer:

Flexible working (we typically work 2-3 days in our office in Vauxhall)
Salary reviews every 6 months or whenever we raise more investment
25 days of holiday plus bank holidays
A workplace pension scheme where if you pay 5% we pay 3%
A brand new Macbook, a running watch of your choice, and anything else you need to do your best work
Private health insurance
Enhanced family care policy (3 months fully paid leave when a new Runna joins the family, fertility support & other benefits)
An hour slot each week (during work time) to do a Runna workout

At Runna we have a limited number of employment visas that we are able to sponsor and are limited by govt. guidelines so cannot guarantee a visa sponsorship to all applicants. Please do apply though as we will consider all applicants.

London, United Kingdom

Hybrid

05-03-2025

Company Name: Runna
Job Title: Software Engineer, Machine Learning (Mid)
Job Description: We're putting together a talented team to build the #1 training platform for Runners

We help everyday runners become outstanding by providing world-class training, coaching and community for everyone, whether you're improving your 5k time or training for your first marathon. To date we have built iOS, Android and Apple watch apps that help people achieve their goals by coaching them through the full journey and syncing to their favourite fitness devices.

We're growing extremely fast and in November 2023 closed a new $6.5M funding round led by JamJar with participation from Eka Ventures, Venrex and Creator Ventures. In 2024, we were selected by Apple as one of three global finalists for the 2024 iPhone App of the Year, reflecting the innovation and impact of what we've built. We want to grow as fast as we can into the future and are looking for individuals who will help us get there. For more about our background and growth check out our Careers Page!

We're now looking ahead to the future and the people who want to help us build and scale Runna. Our aim is to reach millions of subscribers in the next 5 years and be the go-to training platform for any runner. Now is a magical time to join, we're still small, and everyone makes a foundational difference.

What You'll Be Doing

We are looking for talented, creative and positive team players to join our highly-skilled Cross-Functional Engineering Team to help build models and algorithms focussed on running training, to help supercharge our training plans for runners everywhere. As part of this work, you'll be working closely with the product and coaching teams to create components that will dynamically build runners optimal training plans, whilst adapting from external inputs (e.g. workout performance data), and provide insight and recommendations for their future training. You'll be part of the Train team here and we'll all support you along this exciting journey!

As a Machine Learning Engineer your role will include:

Building, testing and delivering new and improved running training features to generate personalised, adaptive training plans for hundreds of thousands of active users, as well as providing insight into performance and recommendations for future training adjustments
Working across the full stack with respect to machine learning engineering - from solution design, data wrangling, model training, deployment, iteration and more - you'll have ownership across the full lifecycle
Continuously improving our modelling components ensure we're always providing state of the art insight and analysis
Collaborating with coaches to best deliver their expertise to users
Using a data driven approach as part of the model/algorithm development process
Designing and implementing evaluation frameworks to ensure accuracy and generalisation of modelling components

Requirements

What experience we're looking for

We encourage applications from individuals with a range of experiences and backgrounds. Even if you don't meet every qualification listed, we'd love to hear from you and are open to tailoring roles to fit the right candidates. Please apply directly below or contact us for more information and to discuss your fit.

Your Key Skills And Experience

Proficiency in Python (object orientated) programming, with experience writing production quality code
Designing and building complex models and algorithms (ideally involving machine learning), comfortable with quantitative methods and approaches to solving problems
Testing modelling focused software to ensure quality and maintainability
Analytical and detail-oriented, with a commitment to producing high-quality work
A good base understanding of computing fundamentals
A pragmatic mindset, with excellent communication and collaboration skills
Able to work in a highly skilled engineering team in a fast-paced, iterative environment. In 2024 we shipped to production:
99 mobile app releases (iOS and Android)
443 API releases
237 modelling backend releases
Enthusiasm for our ways of working which include:
Iterative development, continuous deployment and test automation
Knowledge sharing, pair programming, collaborative design & development (with other engineers, product managers, designers and running coaches)
Shared code ownership & cross-functional teams
Bonus points if you

Have an understanding of deployment, release cycles or CI/CD
Have exposure to delivering features end-to-end, from architecture design and building through to releasing, testing and supporting
Have experience monitoring models and algorithms in production
Have experience with serverless and event driven architectures
Have cloud experience, ideally AWS
Have open-source contributions
Have a strong interest in the health/fitness technologies
Have end-to-end experience with LLMs, from identifying use cases to evaluation and production deployment

Our tech stack

Check out our tech radar here which we are constantly iterating, and below you can find a small reflection of our current tech stack:

Frontend:

React Native (iOS and Android)
Typescript
GraphQL (Apollo Client)
Fastlane
SwiftUI (Apple Watch)
Maestro E2E tests

Backend:

Serverless (AWS)
Lambdas (NodeJS & Python)
AWS AppSync
DynamoDB, S3, SQS, SNS, EventBridge, SageMaker
Postman API tests

All the other good stuff:

Sentry
GitHub Actions
Intercom, Mixpanel
RevenueCat
App Store Connect / Play Store
Google Tag Manager

Benefits

Modelling / ML Engineer Interview process

Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages:

Please let us know if there's anything we can do to better accommodate you throughout the interview process - this can be from scheduling interviews around childcare commitments to accessibility requirements. We want you to show your best self in the process

Introductory chat (30 minutes video call)

Take home technical task (max 1-2 hours to complete)

1.5 hour technical interview (the first half of the call will be used to discuss the take-home technical task from the previous stage and the second half will be some general architecture/tech questions)

Meet the team and in-person chat (in-person chat with founder(s), rest of the team and technical discussion)

Once the process is finished, we promise to let you know our decision as soon as possible. Still have questions? Check out our Careers Page and FAQ.

Benefits and options

We offer a salary of £60k-80k, plus equity in the form of Runna stock options.

We'll be growing our package of benefits over time. We currently offer:

Flexible working (we typically work 2-3 days in our office in Vauxhall)
Salary reviews every 6 months or whenever we raise more investment
25 days of holiday plus bank holidays
A workplace pension scheme
A brand new Macbook, a running watch of your choice, and anything else you need to do your best work
Private health insurance
Enhanced family care policy (3 months fully paid...

London, United Kingdom

Hybrid

12-03-2025

Company Name: Runna
Job Title: Software Engineer, Modelling (Junior)
Job Description: We're putting together a talented team to build the #1 training platform for Runners

We help everyday runners become outstanding by providing world-class training, coaching and community for everyone, whether you're improving your 5k time or training for your first marathon. To date we have built iOS, Android and Apple watch apps that help people achieve their goals by coaching them through the full journey and syncing to their favourite fitness devices.

We're growing extremely fast and in November 2023 closed a new $6.5M funding round led by JamJar with participation from Eka Ventures, Venrex and Creator Ventures. In 2024, we were selected by Apple as one of three global finalists for the 2024 iPhone App of the Year, reflecting the innovation and impact of what we've built. We want to grow as fast as we can into the future and are looking for individuals who will help us get there. For more about our background and growth check out our Careers Page!

We're now looking ahead to the future and the people who want to help us build and scale Runna. Our aim is to reach millions of subscribers in the next 5 years and be the go-to training platform for any runner. Now is a magical time to join, we're still small, and everyone makes a foundational difference.

What You'll Be Doing

We are looking for talented, creative and positive team players to join our highly-skilled Cross-Functional Engineering Team to help build models and algorithms focussed on running training, to help supercharge our training plans for runners everywhere. As part of this work, you'll be working closely with the product and coaching teams to create components that will dynamically build runners optimal training plans, whilst adapting from external inputs (e.g. workout performance data), and provide insight and recommendations for their future training. You'll be part of the Train team here and we'll all support you along this exciting journey!

As a Modelling Engineer your role will include:

Building, testing and delivering new and improved running training features to generate personalised, adaptive training plans for hundreds of thousands of active users, as well as providing insight into performance and recommendations for future training adjustments
Working across the full stack with modelling engineering - from solution design, implementation, testing, deployment, iteration and more - you'll be involved with the full lifecycle
Continuously improving our modelling components ensure we're always providing state of the art training for our runners
Collaborating with coaches to best deliver their expertise to users
Using a data driven approach where possible, as part of the model/algorithm development process
Designing and implementing test strategies to ensure our models and algorithms are accurate, maintainable and generalise well

How To Apply

Still have questions? Check out our Careers Page and FAQ.

Requirements

What experience we're looking for

We encourage applications from individuals with a range of experiences and backgrounds. Even if you don't meet every qualification listed, we'd love to hear from you and are open to tailoring roles to fit the right candidates. Please apply directly below or contact us for more information and to discuss your fit.

Your Key Skills And Experience

Proficiency in Python (object orientated) programming, with experience writing production quality code in a large python codebase
Designing and building complex algorithms, comfortable with quantitative methods and approaches to solving problems
Testing modelling focused software to ensure quality and maintainability
Analytical and detail-oriented, with a commitment to producing high-quality work
A good base understanding of computing fundamentals
A pragmatic mindset, with excellent communication and collaboration skills
Able to work in a highly skilled engineering team in a fast-paced, iterative environment. In 2024 we shipped to production:
99 mobile app releases (iOS and Android)
443 API releases
237 modelling backend releases
Enthusiasm for our ways of working which include:
Iterative development, continuous deployment and test automation
Knowledge sharing, pair programming, collaborative design & development (with other engineers, product managers, designers and running coaches)
Shared code ownership & cross-functional teams
Bonus points if you

Have an understanding of deployment, release cycles or CI/CD
Have exposure to delivering features end-to-end, from architecture design and building through to releasing, testing and supporting
Have experience monitoring models and algorithms in production
Have experience with serverless and event driven architectures
Have cloud experience, ideally AWS
Have open-source contributions
Have a strong interest in the health/fitness technologies

Our tech stack

Check out our tech radar here which we are constantly iterating, and below you can find a small reflection of our current tech stack:

Frontend:

React Native (iOS and Android)
Typescript
GraphQL (Apollo Client)
Fastlane
SwiftUI (Apple Watch)
Maestro E2E tests

Backend:

Serverless (AWS)
Lambdas (NodeJS & Python)
AWS AppSync
DynamoDB, S3, SQS, SNS, EventBridge, SageMaker
Postman API tests

All the other good stuff:

Sentry
GitHub Actions
Intercom, Mixpanel
RevenueCat
App Store Connect / Play Store
Google Tag Manager

Benefits

Modelling / ML Engineer Interview process

Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages:

Please let us know if there's anything we can do to better accommodate you throughout the interview process - this can be from scheduling interviews around childcare commitments to accessibility requirements. We want you to show your best self in the process

Introductory chat (30 minutes video call)
Take home technical task (max 1-2 hours to complete)
1.5 hour technical interview (the first half of the call will be used to discuss the take-home technical task from the previous stage and the second half will be some general architecture/tech questions)
Meet the team and in-person chat (in-person chat with founder(s), rest of the team and technical discussion)

Once the process is finished, we promise to let you know our decision as soon as possible.

Benefits and options

We offer a salary of £47.5k-60k, plus equity in the form of Runna stock options.

We'll be growing our package of benefits over time. We currently offer:

Flexible working (we typically work 2-3 days in our office in Vauxhall)
Salary reviews every 6 months or whenever we raise more investment
25 days of holiday plus bank holidays
A workplace pension scheme
A brand new Macbook, a running watch of your choice, and anything else you need to do your best work
Private health insurance
Enhanced family care policy (3 months fully paid leave when a new Runna joins the family, fertility support & other benefits)
An hour slot each week (during work ...

London, United Kingdom

Hybrid

12-03-2025

Company Name: Runna
Job Title: Software Engineer, Security (Contract)
Job Description: We're putting together a talented team to build the #1 training platform for Runners

We help everyday runners become outstanding by providing world-class training, coaching and community for everyone, whether you're improving your 5k time or training for your first marathon. To date we have built iOS, Android and Apple watch apps that help people achieve their goals by coaching them through the full journey and syncing to their favourite fitness devices.

We're growing extremely fast and in November 2023 closed a new £5M funding round led by JamJar with participation from Eka Ventures, Venrex and Creator Ventures. We want to grow as fast as we can into the future and are looking for individuals who will help us get there. For more about our background and growth check out our Careers Page!

We're now looking ahead to the future and the people who want to help us build and scale Runna. Our aim is to reach millions of subscribers in the next 5 years and be the go-to training platform for any runner. Now is a magical time to join, we're still small, and everyone makes a foundational difference.

Who We're Looking For

We are looking for a talented, creative, and proactive Security Engineer to join our highly skilled cross-functional engineering team and take ownership of security across the entire organisation. As the first security engineer, you'll lead efforts to ensure our cloud infrastructure, applications, and internal processes meet the highest security standards. You'll work closely with the engineering, product, and leadership teams to establish a strong security culture while also ensuring compliance with relevant regulations.

You will partner with our CTO and founders to shape the future of security at Runna and play a critical role in safeguarding our product as we scale. As our first dedicated security hire, you'll have the freedom and support to build a security roadmap from the ground up.

As a Security Engineer, your role will include:

Lead the effort to secure our cloud infrastructure, ensuring secure deployments, access controls, and robust incident response strategies
Establish security monitoring and alerting to detect, respond to, and mitigate potential threats in real-time
Own and drive compliance initiatives (such as GDPR, Cyber essentials) to ensure our organisation meets the required standards
Implement and enforce best practices for encryption, identity and access management (IAM), and network security across the platform
Partner with product, engineering, and business teams to ensure security is embedded in all stages of development and product lifecycle
Create and manage a bug bounty program to incentivise external researchers to identify and report security vulnerabilities
Educate and train the wider team on security best practices, fostering a security-first mindset across the organisation
Stay ahead of emerging threats and technologies, ensuring we adopt the latest tools and practices to maintain a secure environment
Collaborate with external security firms for audits, penetration testing, and other assessments to validate our security posture

Software Engineer Interview Process

Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages:

Kick off! (apply below)
Introductory chat (25-minute video call)
Technical interview (50 mins)

Once the process is finished, we promise to let you know our decision as soon as possible.

Requirements

What experience we're looking for

If you don't quite meet all of the below skills, we'd still love to hear from you as we might be able to tweak the role slightly or offer you a position better suited for you. You can apply directly below or contact us if you're still unsure.

Your key experience:

1+ years in a Security Engineering role or similar
2+ years working with cloud infrastructure (preferably AWS) or as a platform engineer
You've led the development and implementation of key security projects
Experience with security frameworks, policies, and compliance standards (e.g., SOC 2, GDPR, ISO 27001)
Familiarity with penetration testing, vulnerability assessments, and incident response gained through practical experience

Your key skills:

Experience with securing cloud infrastructure, ideally within AWS (e.g., VPC, IAM, Security Groups, CloudTrail, GuardDuty)
Experience with encryption, key management, and identity and access management (IAM)
Hands-on experience with infrastructure as code tools (e.g., CloudFormation, Terraform) and CI/CD pipelines
Experience with security monitoring and observability tools (e.g., AWS CloudWatch, Aikido, Datadog)
A pragmatic mindset, with excellent communication and collaboration skills
Able to work within a highly-skilled engineering team in a fast-paced, iterative environment

Bonus points if you:

Have implemented or managed a bug bounty program
Have experience with serverless architectures
Are familiar with DevSecOps principles and integrating security into the CI/CD pipeline
Have a strong interest in health/fitness technologies or have worked in a similar tech environment

Our tech stack

Check out our Tech Radar here which we are constantly iterating, and below you can find a small reflection of our current tech stack:

Below you can find a small reflection of our current tech stack:

Frontend:

React Native (iOS and Android)
Typescript
GraphQL (Apollo Client)
Fastlane
SwiftUI (Apple Watch)
Maestro E2E tests

Backend:

Serverless (AWS)
Lambdas (NodeJS & Python)
AWS AppSync
DynamoDB, S3, SQS, SNS, EventBridge, SageMaker
Postman API tests

All the other good stuff:

Sentry
GitHub Actions
Intercom, Mixpanel
RevenueCat
App Store Connect / Play Store
Figma

Benefits

We offer a salary of £42,500 - £100,000 (depending on experience), plus equity in the form of Runna stock options.

Based on years of direct, relevant experience. Software Engineer I £42.5k, Software Engineer II £47.5-60k, Software Engineer III £60-75k, Software Engineer IV £77.5-92.5k, Software Engineer V £95k+

We'll be growing our package of benefits over time. We currently offer:

Flexible working (we typically work 2-3 days in our office in Vauxhall)
Salary reviews every 6 months or whenever we raise more investment
25 days of holiday plus bank holidays
A workplace pension scheme where if you pay 5% we pay 3%
A brand new Macbook, a running watch of your choice, and anything else you need to do your best work
Private health insurance
Enhanced family care policy (3 months fully paid leave when a new Runna joins the family, fertility support & other benefits)
An hour slot each week (during work time) to do a Runna workout

At Runna we have a limited number of employment visas that we are able to sponsor and are limited by govt. guidelines so cannot guarantee a visa sponsorship to all applicants. Please do apply though as we will consider all applicants.

London, United Kingdom

Hybrid

14-03-2025

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