Find Web developer Jobs in Rathgar, D

Staff Performance Engineer
Ridgeline —Dublin, County Dublin
- JavaScript
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Senior Network Engineer
Mastercard —Dublin, County Dublin
- Full-time
- Project management
- Bachelor's degree
- Agile
Web Engineer, Marketing
Supermetrics —Dublin, County Dublin
- JavaScript
- AI
- Analytics
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Automation QA Engineer
StoneX Group —Dublin, County Dublin
- Azure
- Computer Science
- English
4d
Senior Software Developer
AMCS Group —Dublin, County Dublin
- Full-time
- Hybrid work
- Computer Science
- Bachelor's degree
- JavaScript
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4d
Senior DevOps Engineer
Newcode.ai —Dublin, County Dublin
- Full-time
- Hybrid work
- Azure
- English
- AI
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QA Automation Engineer
PlayStation Global —Dublin, County Dublin
- €69,500–€104,300 a year
- Computer Science
- Java
- Master's degree
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Senior II Backend Engineer
Ethyca —Dublin, County Dublin
- Full-time
- Azure
- System design
- AWS
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Senior Dataverse / Dynamics 365 AI Business Developer
Codec —Dublin, County Dublin
- Full-time
- Azure
- Oracle
- DevOps
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Digital Experience Engineer (Marketing)
Supermetrics —Dublin, County Dublin
- JavaScript
- AI
- Analytics
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Application Security Engineer
Elwood Roberts —Dublin, County Dublin
- €70,000–€77,000 a month
- Full-time
- Linux
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Frontend Software Engineer - Web Applications
Grouper —Dublin, County Dublin
- Hybrid work
- Azure
- Computer Science
- AWS
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Software Engineer - Web & Integrations
Grouper —Dublin, County Dublin
- Full-time
- Hybrid work
- Azure
- Java
- AWS
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Backend Software Engineer
Grouper —Dublin, County Dublin
- Hybrid work
- Azure
- Computer Science
- Java
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Software Engineer 3, Customer Observability
MongoDB —Dublin, County Dublin
- On call
- Hybrid work
- Azure
- Java
- AWS
Senior Software Engineer, Observability
MongoDB —Dublin, County Dublin
- On call
- Azure
- Java
- AWS
Senior Software Engineer, C2C Services
MongoDB —Dublin, County Dublin
- Azure
- Java
- AWS
Software Engineer 3
MongoDB —Dublin, County Dublin
- Hybrid work
- Computer science
- Azure
- Java

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Staff Performance Engineer

Ridgeline -
Dublin, County Dublin

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Job details

Qualifications

React
D3.js
JavaScript
Distributed systems
Apache
SaaS
Debugging

Full job description

Are you passionate about building lightning-fast user experiences that scale across complex enterprise applications? Do you enjoy solving challenging frontend performance problems, optimizing client-server communication, and using data to drive measurable improvements? Are you excited to partner across engineering teams to define performance best practices and shape the technical direction of a modern web platform? If so, we invite you to join our innovative team.

As a Staff Performance Engineer at Ridgeline, you'll own the strategy for improving application performance across our modern investment management platform. You'll partner closely with product and platform engineering teams to optimize browser rendering, reduce inefficient service interactions, strengthen application observability, and improve the speed and reliability of mission-critical user workflows. You'll build scalable approaches for measuring and maintaining performance while helping establish engineering standards that enable teams to deliver exceptional customer experiences. Our engineers build with cutting-edge technologies—including AI-assisted development tools like Claude Code and Cursor—in a fast-moving, creative, and collaborative environment.

At Ridgeline, how we work matters as much as what we build. Ridgeliners act like owners, choose growth over comfort, and communicate with transparency. We assume positive intent, bias toward action, and bring solutions—not just problems. We celebrate wins, learn from setbacks, and thrive in a resilient, collaborative, high-performing culture.If this excites you, we'd love to meet you!

The impact you will have

Own and drive frontend performance strategy across complex React applications, improving responsiveness, scalability, and reliability.
Analyze browser rendering behavior and optimize application performance across critical customer workflows.
Identify inefficient API usage patterns, excessive client-server communication, and frontend performance bottlenecks.
Measure, monitor, and improve real-user performance metrics across high-impact user experiences.
Build and enhance tooling for browser instrumentation, synthetic testing, performance profiling, and client-side observability.
Develop scalable approaches for performance monitoring, regression detection, and production diagnostics.
Partner with product and platform engineering teams to optimize application architecture and establish frontend performance best practices.
Lead investigations into complex production performance issues and drive root-cause resolution with urgency and ownership.
Mentor engineers and influence technical decisions that raise the performance, quality, and maintainability of our frontend platform.
Contribute to a collaborative engineering culture rooted in learning, teaching, and continuous improvement.

What we look for

8+ years of experience in frontend engineering, application engineering, or performance engineering.
Strong understanding of browser rendering pipelines, JavaScript execution, and modern web performance optimization techniques.
Experience building and optimizing applications with React or similar frontend frameworks.
Experience analyzing network behavior, API interactions, caching strategies, and client-side performance bottlenecks.
Familiarity with real-user monitoring, browser profiling, synthetic testing, and application observability tools.
Strong debugging and problem-solving skills in modern web application environments.
Ability to communicate technical findings clearly and influence engineering decisions across multiple teams.
Passion for improving engineering practices through technical leadership, collaboration, and mentorship.
Willingness to learn emerging technologies while developing expertise in complex business domains.
Serious interest in having fun at work.

Bonus

Experience building high-performance, data-intensive browser applications, such as analytics platforms, observability tools, trading systems, or real-time dashboards.
Familiarity with modern client-side data and visualization technologies such as Apache Arrow, AG Grid, DuckDB-WASM, Perspective.js, D3, Vega/Vega-Lite, ECharts, or similar frameworks.
Experience optimizing large-scale data rendering, virtualized tables, browser memory usage, and client-side compute performance.
Experience with synthetic monitoring, browser automation, or frontend observability tooling.
Familiarity with distributed systems, event-driven architectures, or service-oriented applications.
Experience improving performance in large-scale enterprise SaaS applications.
Knowledge of Core Web Vitals, browser networking, accessibility, and frontend quality best practices.

About Ridgeline

Ridgeline is headquartered in Lake Tahoe, with offices in New York, Reno, the Bay Area, Dublin Ireland. Ridgeline is recognized by Fast Company as a "Best Workplace for Innovators," by Frost & Sullivan as a "Technology Innovation Leader," and by The Software Report as a "Top 100 Software Company."

Ridgeline is proud to be a community-minded, discrimination-free equal opportunity workplace.

Ridgeline processes the information you submit in connection with your application in accordance with the Ridgeline Applicant Privacy Statement. Please review the Ridgeline Applicant Privacy Statement in full to understand our privacy practices and contact us with any questions.

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web developer jobs in rathgar, d

Staff Performance Engineer

Senior Network Engineer

Web Engineer, Marketing

Automation QA Engineer

Senior Software Developer

Senior DevOps Engineer

QA Automation Engineer

Senior II Backend Engineer

Senior Dataverse / Dynamics 365 AI Business Developer

Digital Experience Engineer (Marketing)

Application Security Engineer

Frontend Software Engineer - Web Applications

Software Engineer - Web & Integrations

Backend Software Engineer

Software Engineer 3, Customer Observability

Senior Software Engineer, Observability

Senior Software Engineer, C2C Services

Software Engineer 3

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