Senior Full-Stack Lead – Next.js, AWS & PostgreSQL

Welocity; City Of London; On-site; GBP 85,000 - 110,000; Full time

Job summary

Welocity is seeking a Senior Full Stack Developer to join our London team. You will design, develop, and maintain scalable, high-quality software using Next.js, PostgreSQL, and AWS Lambda.

You will lead projects, mentor junior developers, and collaborate across teams to deliver robust solutions. We value innovation and proactive problem-solving, with a focus on best practices, scalable architectures, and cloud-based deployments.

Qualifications

• Senior Full Stack Developer capable of leading design, development and delivery of scalable, maintainable applications.
• Strong command of Next.js, PostgreSQL, and AWS Lambda; proficient in JavaScript, HTML and CSS.
• Experience designing RESTful APIs and microservices; version control with Git.
• Proactive problem-solver with excellent communication; comfortable mentoring juniors.
• Familiar with agile processes and DevOps practices; able to work with cross-functional teams.

Responsibilities

• Lead the design, development and deployment of scalable full‑stack apps.
• Collaborate with cross-functional teams to define and ship features.
• Mentor junior developers and promote continuous learning.
• Ensure performance, quality and responsiveness through testing and debugging.
• Implement and manage AWS Lambda services; optimize PostgreSQL performance.
• Develop server-side logic and integrate frontend elements.
• Stay updated with new technologies and industry trends.

Skills

Problem-solving

Communication

Agile methodologies

DevOps practices

Education

Bachelor's degree in Computer Science or related field

Tools

Next.js

PostgreSQL

AWS Lambda

RESTful APIs

Microservices

Git

Job description

Welocity is seeking a Senior Full Stack Developer to join our London team. You will design, develop, and maintain scalable, high-quality software using Next.js, PostgreSQL, and AWS Lambda.

You will lead projects, mentor junior developers, and collaborate across teams to deliver robust solutions. We value innovation and proactive problem-solving, with a focus on best practices, scalable architectures, and cloud-based deployments.