Senior full stack engineer (javascript) Work, Jobs in London, Eng (with Salaries)

Full Stack Software Engineer (Senior)
Xe —London
- Full-time
- AI
- Leadership
- Communication skills
- Employee stock purchase plan
- Annual leave
Quick apply
Senior Frontend Engineer, Growth
Incard —London
- Full-time
- Annual leave
- Sick pay
Quick apply
Sr. Software Engineer
White Way Web —London
- £49,000 - £60,000 a year
- Full-time
- Hybrid work
- Azure
- Software troubleshooting
- In-person
- Flexitime
Quick apply
Senior Cyber Software Engineer/ Technical Lead
BAE Systems —London
- Hybrid work
- Mentoring
- Software development
Sr Software Engineer I
American Express —London
- Full-time
- Computer Science
- Engineering
- Bachelor's degree
- Life insurance
2d
Senior Backend Software Engineer
Freetrade —London
- £75,000 - £115,000 a year
- Full-time
- Hybrid work
- Mentoring
- Recruiting
Senior Developer - Web & Integrations
Funraisin —London
- £65,000 - £75,000 a year
- Full-time
- Hybrid work
- Up to 50% travel
- Salesforce
- Databases
- Flexitime
- Work from home
Quick apply
Senior Creative Software Engineer (ReactJS & WebGL)
Vista Group —London
- Full-time
- Machine learning
- AI
- Leadership
- Annual leave
- Flexible schedule
6d
Senior Software Engineer
Zaizi —London
- £60,000 - £75,000 a year
- Hybrid work
- Mentoring
- Agile
- Annual leave
- Work from home
Quick apply
8d
Senior Full Stack Developer
Appvia —London
- £70,000 - £85,000 a year
- Full-time
- Hybrid work
- AI
- Employee assistance programme
- Flexible schedule
Quick apply
Full Stack Software Engineer B2B
UNiDAYS —London
- Hybrid work
- Mentoring
- Communication skills
- Employee assistance programme
Senior Backend Engineer - Commercial Technology
On AG —London
- Agile
- Communication skills
Senior Full Stack Engineer
Emma Technologies —London
- Employee discount
- Referral programme
Junior Full Stack Software Engineer
Bionic Services Ltd —London
- £35,000 - £45,000 a year
- Full-time
- Hybrid work
- Software troubleshooting
- Salesforce
- AI
- Annual leave
- Employee assistance programme
Quick apply
6d
Senior Full Stack Engineer- i.AI
Department for Science, Innovation & Technology —London
- £56,850 - £88,670 a year
- Part-time
- Hybrid work
- Presentation skills
- Mentoring
- AI
- Annual leave
- Employee discount
7d
Senior Software Engineer
Bite Engineering —London
- Full-time
- Hybrid work
- Master's degree
- Communication skills
Quick apply
Lead Software Engineer
Searchland —London
- £95,000 - £110,000 a year
- Hybrid work
- Mentoring
- AI
- Leadership
Quick apply
Full Stack Engineer (Senior)
Xe —London
- Full-time
- AI
- Leadership
- Communication skills
- Employee stock purchase plan
- Annual leave
Quick apply
Software Engineer (Mid-level)
Freetrade —London
- £52,000 - £75,000 a year
- Full-time
- Hybrid work
- In-person
- Work from home
- Life insurance
Sr. Backend Engineer
Andercore —London
- Full-time
- Heavy lifting
- Master's degree
- AWS

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Full Stack Software Engineer (Senior)

Xe -
London

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Job details

Full-time

Benefits

Employee stock purchase plan
Annual leave
Company pension
Paid volunteer time

Qualifications

Jira
CI/CD
Kotlin
Go
Relational databases
Test automation
Software development operations experience
Microservices
OOP
CI/CD pipelines
Confluence
Redis
Back-end development
Front-end development
S3
DynamoDB
Vue.js
AI
Software development or architecture experience
Leadership
Communication skills
SDLC

Full job description

Description

About Xe

Xe is a cross-border payments platform. We help SMEs and consumers in the US, UK, Canada, Australia, and New Zealand collect, convert, hold, and send money across markets. Each year, over 300 million people use Xe for currency information and over 350,000 use us to send money overseas.

Today, we're rebuilding the platform layer behind cross-border payments for corporate and consumer clients. We're small enough that your code ships fast and your decisions matter, and Euronet Worldwide (Nasdaq: EEFT) backs us so the problems stay real-scale.

About This Role

We're hiring a senior full-stack engineer who owns real problems end-to-end and shapes how the team builds, from API design and frontend experience through to backend services, production reliability, and launch. You already use AI as part of how you think, build, test, and ship.

You'll write code that moves money in production, design and modernize the platform across the stack, and lead delivery of customer-facing features as Xe rebuilds its platform layer. You'll work in a small engineering team with direct access to product, design, and compliance, own architecture in your domain, lead design reviews, mentor mid-level engineers, and partner with architects and team leads on cross-domain decisions.

What You'll Do

Design and own features across the stack that move money and manage multi-currency balances across a range of domains, including onboarding, KYC and KYB, payment initiation, FX, settlement, and other supporting services.
Lead delivery of customer-facing features that customers use every day, from the interface through to the services behind them.
Own production health for your domain, including reliability, observability, on-call, and incident response.
Lead cross-functional delivery with product, design, and compliance from problem framing through launch.
Lead design reviews, set technical direction for your domain, and mentor mid-level engineers.
Use agentic coding tools (Copilot, Cursor, Claude Code, or equivalent) daily across the SDLC, and lead modernization from legacy services into the modern stack alongside architects and team leads in your domain.

What We're Looking For

Must-have

6 to 10+ years building production web applications, end-to-end.
Strong frontend proficiency with Vue.js, React, or equivalent.
Strong backend proficiency in C# / .NET preferred; other OOP languages welcome (Java, Kotlin, Go, or equivalent).
Solid SQL and relational database fundamentals.
Writing and maintaining tests as part of how you ship.
Daily use of agentic coding tools (Copilot, Cursor, Claude Code, or equivalent) across the SDLC.
Production experience on AWS, including hands-on deployment, CI/CD pipelines and modern deployment practices, and native services such as SQS, DynamoDB, S3, ECS, and Lambda.
Strong system design and architecture experience, including service-oriented or microservices and event-driven patterns.
Payments, FX, or regulated-industry experience.
Track record of technical leadership: mentoring engineers, leading design reviews, and making architecture decisions in your domain.
Strong communication and collaboration across engineering, product, and design.

Nice-to-have

Frontend fundamentals: responsive design, accessibility, web performance, and internationalization.
Experience leading front-end or platform modernization and migrations.
Experience with caching solutions like Memcached or Redis.
Experience using project management and documentation tools like Jira and Confluence.
Knowledge of API testing tools such as Postman or Bruno.
Writing automated tests alongside development with AI tools (Claude Code or equivalent).

Perks & Benefits

Competitive Salary & Discretionary Bonus
23 days annual leave increasing with service (capped at 28 days)
Paid day off for your Birthday
4% employer pension contribution
Discounted Euronet ESPP
Life Cover, Income Protection & Critical Illness cover
Healthcare
Plumm Mental Health and Wellbeing
Volunteering day for a charity of your choice

We want Xe to be a great place to work and to ensure that our communities are represented across our workforce. A vital part of this is ensuring we are a truly inclusive organization that encourages diversity in all respects.

Xe is an Equal Employment Opportunity employer. All qualified applicants will be considered for employment regardless of age, national origin, race, color, disability, religion, sexual orientation, gender identity or expression, or any other characteristic protected under applicable law. We are committed to providing reasonable accommodations to qualified individuals with disabilities. If you need assistance or an accommodation due to a disability, you may contact us at [email protected].

The position responsibilities outlined above are intended to define the general contents and requirements to perform this job. It is not to be taken as a complete statement of responsibilities or requirements. This job description does not restrict the Company's right to assign or reassign duties and responsibilities to this job as needed.

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