Senior Developer (Freelance)

twentysix; Castletown; On-site; GBP 61,000 - 91,000; Full time

Job summary

twentysix is seeking a Senior Developer to join an established client engagement and help evolve a digital application. You’ll focus on technical debt, accessibility, and delivering with a product-minded approach. The role suits a frontend or full-stack developer with Next.js, TailwindCSS, and TypeScript expertise.

Independent problem-solving and agile collaboration are key. You’ll join a team already running in a sprint cadence, contributing to code quality, PRs, and timely delivery with

Qualifications

• Senior-level experience as a Frontend or Full Stack Developer delivering production-grade digital experiences.
• Experience building modern web apps with Next.js, TailwindCSS, and TypeScript.
• Strong troubleshooting skills and ability to work independently in a fast-paced environment.
• Experience addressing technical debt and improving accessibility.
• Familiarity with Agile/sprint-based development processes.

Responsibilities

• Work through prioritized technical debt within an established web application.
• Investigate, troubleshoot, and resolve issues independently with collaboration when needed.
• Address accessibility issues and improve overall quality and maintainability.
• Operate within an established sprint cadence from definition to completion.
• Coordinate with backend engineering, QA, and Production on priorities and delivery.
• Prepare clean pull requests with documentation and respond to review feedback.
• Surface risks, blockers, or dependencies affecting delivery.

Skills

Next.js

Tailwind CSS

TypeScript

Frontend development

Full Stack development

Troubleshooting

Tools

Git

Job description

The Role

We’re looking for a Senior Developer to join an established client engagement and help strengthen and evolve an existing digital application. This is an extension of a long-standing partnership, and you’ll step into a team and sprint process that are already up and running.

The focus of this engagement will be working through technical debt within the application: independently identifying and resolving issues, improving the health and accessibility of the experience, and helping the team maintain steady delivery. We’re looking for a product-minded Frontend or Full Stack Developer with strong Next.js and Tailwind CSS experience who can get oriented quickly, troubleshoot effectively, and move work forward with minimal oversight.

Contract: September 14 – October 30Commitment: Approximately 20 hours/week

What You'll Do

• Work through prioritized technical debt within an established web application.
• Investigate, troubleshoot, and resolve issues independently, escalating or collaborating when needed.
• Address accessibility issues and help improve the overall quality and maintainability of the experience.
• Work within an established sprint cadence, taking ownership of assigned work from definition through completion.
• Partner closely with backend engineering, QA, and Production to align on priorities, dependencies, and delivery.
• Contribute clean, well-scoped pull requests with clear documentation and respond thoughtfully to review feedback.
• Proactively surface technical risks, blockers, or dependencies that could impact delivery.

What You'll Bring

• Senior-level experience as a Frontend or Full Stack Developer building and maintaining production digital experiences.
• Experience building modern web applications with Next.js, TailwindCSS and Typscript
• Strong troubleshooting and problem-solving skills, with the ability to work independently and make sound technical decisions.
• Experience working within established codebases and addressing technical debt.
• Experience identifying and resolving web accessibility issues.
• Strong development practices, including clean PR etiquette, sensible scoping, and responsiveness to code review.
• Comfort working within an established Agile or sprint-based development process.
• Strong communication and collaboration skills across engineering, QA, and Production.
• The ability to get up to speed quickly and make meaningful progress without significant hand-holding.

What We Offer

The expected contract pay range: $60-89 per hour. Contract compensation is determined by location, experience, and skillset. We have three regional pay ranges that are adjusted for cost of living (US1 +15%, US2 +7.5%, US3 Base), *learn more about our pay philosophy and cost of living adjustments.Benefits may be available in accordance with applicable law and company policy, including eligibility based on hours worked and duration of assignment.