Full-Stack Javascript Developer in Chelmsford

You'll be a senior developer on our in-house travel management platform, working across the full stack — from React frontends to Node.js APIs and background processing services that handle live travel data. The platform spans Linux and Windows environments, including containerised services running on Docker. The role involves real-time problem diagnosis, complex data transformation across multiple databases, and a high degree of autonomy. You'll be expected to own technical decisions, independently investigate and resolve issues across the entire stack, and operate as a trusted point of escalation when things go wrong. This is a hands-on technical role with genuine responsibility.

Skills & Experience:

• 3+ years commercial experience with Node.js and TypeScript
• Strong SQL skills — complex queries, relational schemas, multi-database environments (PostgreSQL and/or MS SQL Server)
• React (hooks, functional components)
• Experience transforming and mapping complex data structures (XML, JSON)
• Git — confident with branching, conflict resolution
• Familiarity with NestJS, tRPC, or similar API frameworks is a strong plus
• Experience with background processing patterns (queues, cron jobs, webhooks) is highly valued

Key Responsibilities:

• Build and maintain features across React frontends and Node.js/NestJS APIs
• Develop and support background processing services that ingest and transform travel data from external systems
• Write and optimise complex SQL across PostgreSQL and MS SQL Server databases
• Investigate and resolve production issues end-to-end — from browser through API to database and background processors
• Drive forward platform modernisation initiatives as they are prioritised

Please note that this role requires a security clearance process (you must have lived in the UK for 5 consecutive years to be eligible) and a DBS check. Do not apply if you are not willing to undergo these conditional background checks, this continually applies during the course of your employment.

Join our crew and help CTM take flight. Apply now and pack your skills for a business travel journey that promises growth, discovery and plenty of first-class moments.

What to expect from the recruitment process:

• Every hire starts with a chat with our Talent Acquisition team; if your profile is selected you will be contacted by phone or email (please check your spam folder).
• If you are progressing, the hiring manager will invite you to an interview, usually on Teams.
• If you are successful we will invite you to our office for a final stage interview.
• Wherever possible we will provide you with feedback; however, we are a small team and often we won't be able to do so until after we fill the vacancy.

CTM is a responsible employer and is dedicated to conduct thorough right to work checks in the interests of both parties, candidates and the company. Candidates selected and invited to an interview will be invited to a mandatory 15 min call with the TA lead to produce their RTW documents. This call is a mandatory step for all candidates regardless of their RTW status. This call is confidential and conducted by HR professionals only.

CTM is an equal opportunity employer. We want to make sure our entire recruitment process is accessible to everyone. If you need accommodations at any stage of the application or interview process, please let us know: as a Disability Confident Employer, we’re here to support you in any way we can.

Employee Wellbeing and Flexibility:

• Most of our roles offer a hybrid working pattern, with 3 days per week in the office. Where permitted and depending on the role, we can offer flexible start and finish times to suit your other commitments and support a healthy work-life balance.

CTM is the Data Controller with respect to the personal information you provide during your application. We will use this information solely to process your application, and our legal basis is that you are considering taking up an employment contract with us.