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Senior Typescript Backend Developer Location : London Role Type: Permanent Work Setup : Hybrid - 3 days in the office Who We Are Vanguard is a global investment firm known for low-cost funds and ETFs, helping investors achieve long-term financial goals with transparent, disciplined strategies. What you'll do Develop and enhance backend services supporting authentication and MFA platforms. Design, build and maintain RESTful APIs using TypeScript, Node.js and NestJS. Deploy, monitor and support applications within AWS using Infrastructure as Code. Maintain production services, including software updates, database migrations and operational support. Contribute to CI/CD pipelines, automated testing and continuous improvements to engineering practices. Collaborate with product, security and engineering teams to deliver secure, reliable technical solutions. What you bring Strong commercial experience with TypeScript, Node.js and NestJS or Express, with a proven track record of building RESTful APIs. Hands-on experience with AWS services including ECS, Lambda, CloudFront, S3 and Secrets Manager, alongside Infrastructure as Code using CloudFormation, CDK or Terraform. Good understanding of authentication technologies such as OAuth 2.0 and JWT, with exposure to identity or MFA platforms (e.g. Auth0 or Transmit Security) being advantageous. Experience using Git, CI/CD tools (such as GitHub Actions), and writing unit and integration tests with Jest. Knowledge of microservices architecture, API gateways (such as Kong), and databases including Aurora PostgreSQL or DynamoDB would be beneficial. Familiarity with security principles including IAM, encryption and networking, alongside observability tools such as OpenTelemetry, Honeycomb or Grafana. What's Next If you are ready to take the next step, apply now! Successful applicants will be contacted directly by a recruiter to discuss the role more. We are committed to creating an inclusive recruitment experience. If you require support or adjustments to the recruitment process, our Adjustment Concierge Service is here to help. Please feel free to contact us at adjustments@robertwalters.com to discuss how we can support you. This position is being recruited on behalf of our client through our Outsourcing service line. Resource Solutions Limited, trading as Robert Walters, acts as an employment business and agency, partnering with top organizations to help them find the best talent. We welcome applications from all candidates and are committed to providing equal opportunities.
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Most developer ads you'll see are written in English: 18,397 of the 24,795. That doesn't tell you whether the job itself requires you to speak English or work in English daily, so read each posting carefully. Don't assume the language of the ad matches the language of the team.
The employers posting the most developer roles are Link Group (369 jobs), Upvanta (257), jobgether (226), and OfferZen (212). If you're applying to any of these, research their hiring patterns. They move fast and post often, which means they're either scaling hard or replacing people who didn't fit.
In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.