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Senior Software Engineer JavaScript

Senior Software Engineer JavaScript

Oscar Technology

Posted 2 days ago, valid for 3 days

Colchester, Essex CO6 3JQ, England

£40,000 - £50,000 per hour

Full Time

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Sonic Summary

The position is for a Senior Software Engineer specializing in JavaScript, based in Colchester with a hybrid work model of two days in-office.
The salary range for this role is between £40,000 and £50,000, accompanied by flexible working hours and an award-winning company culture.
Candidates should have a strong background in JavaScript and experience in leading development teams, with a focus on mentoring juniors and participating in architecture and sprint planning.
The tech stack includes Node.js, React.js, JavaScript/TypeScript, HTML/CSS, and PostgreSQL, with additional desirable skills in Next.js, GCP or AWS, and CI/CD pipelines.
This role offers the chance to work on high-impact projects for globally recognized clients while fostering innovation and collaboration within the team.

Senior Software Engineer (JavaScript)?? Colchester - Hybrid (2 days in-office, your choice)?? £40,000 - £50,000 + flexible hours + award-winning culture

Are you a strong JavaScript developer who's ready to take the next step into leadership? We're working with an award-winning Colchester-based business that partners with household name global clients, and they're looking for a Senior Software Engineer to help lead their talented dev team.

Why this role?

Flexible working hours - work to your own rhythm, just be contactable between 10am and 4pm.
Hybrid working - in the office just two days a week (you choose which ones).
Step into leadership - lead a team of 5 developers, mentor juniors, and get involved in sprint planning and architecture.
Work with big brands - contribute to high-impact projects for globally recognised clients.
Innovation welcome - got big ideas? You'll have the space to test, build and pitch them.

This is the perfect opportunity for someone who's been playing a key role in development teams - maybe already guiding juniors or contributing to planning - and now wants to take ownership and steer a small, sharp team.

The Role

You'll be working on complex systems, helping to shape architecture, and driving technical decisions. There's plenty of variety here - from backend APIs to frontend UI, R&D, and dev strategy. The environment is collaborative and forward-thinking - your voice will matter.

Tech Stack

Required:

Node.js
React.js
JavaScript / TypeScript
HTML / CSS
PostgreSQL
Backend APIs

Nice to Have:

Next.js
GCP or AWS
Slack, Postman
CI/CD pipelines
Python

You'll Be:

Leading a team of 5 talented developers
Supporting and mentoring junior team members
Getting involved in architecture and sprint planning
Innovating and contributing to tech strategy
Building scalable systems for major global brands

Senior Software Engineer (JavaScript)?? Colchester - Hybrid (2 days in-office, your choice)?? £40,000 - £50,000 + flexible hours + award-winning culture

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