Senior Frontend Engineer Job at 80Twenty (San Francisco)

Senior Software Engineer - Frontend

You’ll join the team primarily responsible for our overall front-end experience,...

Location

United States

Salary:

200000.00 - 225000.00 USD / Year

Tines

Expiration Date

Until further notice

Requirements

Capable with a high-level programming language
Comfortable building a small command-line program that makes decisions based on JSON input
Comfortable working across frontend, backend, and infrastructure (broad role, not specialized)
Must be authorized to work for any employer in the U.S. (for U.S. roles)

Job Responsibility

Work closely with colleagues to build solutions to customer problems
Write and review high quality, well tested code
Identify areas for improvement in codebase and workflows
Own problems and software solutions all the way to production
Shape and evolve our design system, building high-quality components
Mentor other engineers (at higher levels)
Help prioritise our roadmap (at higher levels)

What we offer

Competitive salary
Startup equity & extended exercise window
Matching retirement plans
Home office setup
Private healthcare plans
25 days annual leave
Extra company holidays
Generous parental leave programs
Flexibility in how and where you work
Phone and home Internet allowance

Fulltime

Senior Frontend Software Engineer

Addepar is seeking a Senior Frontend Software Engineer to join our Partner Platf...

Location

United Kingdom , Edinburgh

Salary:

Not provided

Addepar

Expiration Date

Until further notice

Requirements

B.S., or M.S. in Computer Science or similar technical field of study (or equivalent practical experience)
Extensive software engineering experience
Proficient in frontend development
Moderate backend experience, specifically with Python or Java
Experience with databases and SQL
A strong ownership mentality and drive to solve the most important problems
Passion for implementing standard processes with a bias toward smart automation
Proven ability to collaborate with and mentor other engineers
A rapid learner with robust analytical and problem-solving abilities

Job Responsibility

Architect, implement, and maintain engineering solutions to solve complex problems
write well-designed, testable code
Lead individual project priorities, deadlines, and solutions
Collaborate effectively with product managers, engineers and partners on projects
Communicate technical ideas and set direction on projects with a focus on solving business challenges
Mentor other engineers on the team
Participate in the design and development of a strategic product for Addepar
Write clean, efficient, and maintainable code that's also scalable and extensible

Fulltime

Senior Frontend Engineer

We’re seeking a highly skilled Senior Frontend Engineer to help lead frontend de...

Location

Salary:

Not provided

Tech Holding

Expiration Date

Until further notice

Requirements

5+ years of professional experience in frontend development, with a strong focus on building dynamic and responsive web applications
Expert understanding of the JavaScript ecosystem, specifically around React, TypeScript, and testing frameworks
Expert understanding of user-centered design principles, design systems, and responsive design
Demonstrated experience in improving web application performance
Strong communication skills and experience working in a collaborative, Agile environment

Job Responsibility

Develop and maintain user-facing features with clean and reusable code
Collaborate with the design team to ensure pixel-perfect UI and a smooth and intuitive user experience
Collaborate with the product team to understand requirements, scope and prioritize features to ensure timely delivery
Write and maintain unit and integration tests to ensure code quality and reliability
Optimize for speed, scalability, and performance
Review code and provide technical feedback to team members
Mentor and coach junior frontend engineers
Participate in agile sprint rituals such as standups and planning
Write and maintain internal technical documentation
Debug and resolve production issues

What we offer

Remote and flexible work environment
Exposure to enterprise clients and transformative cloud projects
Opportunity to directly impact Tech Holding's growth and client success
Competitive compensation package

Fulltime

Senior Frontend Engineer - ReactJS

At JOIN, we believe hiring should be easy, fast, and fair - for companies and ca...

Location

Spain , Barcelona

Salary:

70000.00 - 80000.00 EUR / Year

join.com

Expiration Date

Until further notice

Requirements

4+ years of experience as a Frontend Engineer working with modern JavaScript frameworks (React preferred)
Strong understanding of TypeScript, HTML5, and CSS3
Solid experience with state management libraries (Redux, Zustand, or similar)
Knowledge of API integration patterns and data fetching (REST, GraphQL)
Familiarity with testing frameworks such as Jest, React Testing Library, or Cypress
Understanding of CI/CD pipelines and version control using Git
Experience working collaboratively in cross-functional Agile teams
Strong focus on performance, accessibility, and usability

Job Responsibility

Collaborate with Backend Engineers, Product Managers, and DevOps/Platform teams to deliver meaningful, high-quality features through our Agile SDLC/Kanban workflow
Conduct peer code reviews and participate in retrospectives to identify improvements and drive collective growth
Help define requirements, propose solutions, and contribute to achieving team goals effectively
Take part in technical discussions on testing culture, architectural decisions, automation, and coding standards
Go beyond coding - think holistically about product value and customer experience, continuously looking for ways to improve it

What we offer

Apple hardware – The best tools for the job (MacBook)
Team events – Brunches, sports activities, and quarterly gatherings in Berlin
Productivity from Everywhere – 104 days per year remote (post-probation), following our hybrid policy
Competitive salary – Tailored to align with your experience level
Relocation support – Assistance with paperwork, travel, and one month of furnished accommodation

Fulltime

Senior Frontend Engineer

We’re hiring a Senior Frontend Engineer to help shape the future of the enterpri...

Location

Salary:

Not provided

Island

Expiration Date

Until further notice

Requirements

5+ years of experience as a Fullstack Engineer
Hands-on experience with cloud platforms (AWS, GCP, or Azure)
Strong skills in both modern frontend and backend technologies
Ability to thrive in fast-paced, collaborative environments

Job Responsibility

Work on the core of our enterprise browser platform — building scalable, high-performance features that power the modern enterprise
Collaborate closely with product and design teams to craft intuitive user experiences
Tackle complex engineering challenges on both frontend and backend systems
Push boundaries: streamlining workflows, enhancing productivity, and redefining what’s possible inside the browser

Fulltime

Senior Frontend Software Engineer

We are looking for brilliant, creative, curious, and experienced frontend softwa...

Location

United Kingdom , Edinburgh

Salary:

Not provided

Blis

Expiration Date

Until further notice

Requirements

Javascript and Typescript
ReactJS
CSS and CSS preprocessors
Advanced HTML and DOM knowledge
RESTFul, SPA, and MVC concepts and architectures
Playwright, RTK Query, React Testing Library
7+ years experience as a frontend engineer exposed to visual-oriented, customer-centric web applications
Degree in Computer Science, Software Engineering, or similar

Job Responsibility

Innovate, implement, support, and iterate on our user-facing web applications
Write and improve robust and highly maintainable Javascript and ReactJS code
Ensure our designs and systems are resilient, robust, and secure
Support and mentor other members of the team
Commitment to Blis' Inclusion initiatives & 5 step sustainability plan

Senior Frontend Engineer

As a Senior Frontend Engineer for Growth at Checkr, you will play a crucial role...

Location

United States , Denver; San Francisco

Salary:

155000.00 - 215000.00 USD / Year

Checkr

Expiration Date

Until further notice

Requirements

5+ years of professional experience building web applications
Strong React skills — deep understanding of hooks, context, component patterns, and performance optimization
TypeScript proficiency in a production environment
Experience with JavaScript testing frameworks (Jest, Vitest, React Testing Library, Cypress)
Experience running A/B experiments and using data to inform product decisions
Ability to write clean, maintainable, well-tested code
Excellent collaboration skills — comfortable working directly with Product Managers and Designers
Strong communication skills — can articulate technical tradeoffs to non-technical stakeholders

Job Responsibility

Develop new customer experience capabilities and product offerings from design through release
Find the balance between speed to market and long-term growth by designing for the horizon and building for today
Bring an iterative mindset to experiment, learn, and iterate to provide the best experience for the customers
Partner with Product to define appropriately sized initiatives to construct a roadmap that meets business needs quarter over quarter
Preserve customer goodwill by ensuring system availability by participating in on-call rotation, addressing support tickets, and taking action on preventative measures to improve reliability
Provide mentorship to engineers on the team and across the organization
Play an active role in the continuous improvement of the engineering organization through lunch table discussions, team showcases, and reviews with senior leadership

What we offer

A fast-paced and collaborative environment
Learning and development allowance
Competitive cash and equity compensation, and opportunity for advancement
100% medical, dental, and vision coverage
Up to $25K reimbursement for fertility, adoption, and parental planning services
Flexible PTO policy
Monthly wellness stipend
In-office perks (lunch four times a week, a commuter stipend, and an abundance of snacks and beverages)
A relocation stipend may be available for those willing to relocate to a Checkr hub location

Fulltime

Senior Frontend Engineer

You’ll be part of the Data organization, building and operating the core technol...

Location

Spain , Madrid; Barcelona

Salary:

50000.00 - 65000.00 EUR / Year

Fever

Expiration Date

Until further notice

Requirements

You’re someone who enjoys solving problems, takes initiative, and adapts well to a dynamic environment
You have solid experience with modern frameworks like Angular (+16), React, Svelte, Astro
You’re comfortable addressing cross-browser compatibility challenges and building responsive designs
You’re confident working with RESTful APIs and have experience with API-first development and OpenAPI specifications
You write maintainable, high-quality code that aligns with established standards—and you naturally think in terms of testing and reliability
You’re fluent in business English and communicate effectively in a collaborative team setting

Job Responsibility

Design easy-to-use, performant, and exciting web experiences serving thousands of users around the world
You'll work as part of an agile, cross functional team with other full stack, mobile, backend and frontend engineers, together with the product designers
Understand the technical trade offs of different solutions, implement them and make them scalable
Have a product-oriented mindset and work towards best outcomes for the product
Collaborate with the larger team via regular design critiques and working sessions

What we offer

40% discount on all Fever events and experiences
Home office friendly anywhere in Spain
Responsibility from day one and professional and personal growth
Great work environment with a young, international team of talented people to work with
Health insurance and other benefits such as Flexible remuneration with a 100% tax exemption through Cobee
English and Spanish Lessons
Gympass Membership
Possibility to receive in advance part of your salary by Payflow
Compensation package consisting of base salary and the potential to earn a significant bonus for performance

Fulltime

Senior Frontend Engineer

80Twenty

Location:
United States , San Francisco

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
January 11, 2026

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Job Description:

Job Responsibility:

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Additional Information:

Job Posted:January 11, 2026

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Job Posted:
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