Senior Full Stack Developer

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

Overview

We are seeking a highly skilled Senior Full Stack Developer to join our dynamic team in London. This role will play a crucial part in designing, developing, and maintaining innovative solutions using cutting-edge technologies. The ideal candidate will have a strong background in both front-end and back-end development, with expertise in Next.js, PostgreSQL, and AWS Lambda. As a senior member of the team, you will be expected to lead projects, mentor junior developers, and collaborate with cross-functional teams to deliver high-quality software solutions. This is an exciting opportunity for a seasoned developer to contribute to challenging projects in a fast-paced environment. The successful candidate will be instrumental in driving technological advancements and implementing best practices within the organization. You will have the chance to work on complex problems, design scalable architectures, and ensure seamless integration across various platforms. The role demands a proactive individual who is adept at problem-solving and can work independently, while also collaborating effectively within a team. You will be responsible for ensuring the delivery of robust and scalable applications that meet business needs and adhere to industry standards. We value innovation, and the ideal candidate will bring fresh ideas to the table, enhancing our technological footprint and contributing to our growth strategy. This position offers a unique opportunity to influence the technical direction of the team and drive forward our mission to deliver exceptional digital experiences.

Key Responsibilities

• Lead the design, development, and deployment of scalable and maintainable full-stack applications.
• Collaborate with cross-functional teams to define, design, and ship new features and enhancements.
• Mentor and guide junior developers, fostering a culture of continuous learning and improvement.
• Ensure the performance, quality, and responsiveness of applications by conducting thorough testing and debugging.
• Implement and manage AWS Lambda functions and services for cloud-based applications.
• Optimize database performance and ensure data integrity using PostgreSQL.
• Develop and maintain server-side logic, including the integration of user-facing elements developed by front-end developers.
• Stay updated with emerging technologies and industry trends, integrating them into operations and activities.

Requirements

• Proven experience as a Senior Full Stack Developer with expertise in Next.js, PostgreSQL, and AWS Lambda.
• Strong proficiency in JavaScript, HTML, CSS, and modern front-end frameworks.
• Experience with version control systems, preferably Git.
• Demonstrated ability to design and develop RESTful APIs and microservices.
• Excellent problem-solving skills and a proactive attitude towards tackling complex technical challenges.
• Familiarity with agile development methodologies and DevOps practices.
• Exceptional communication skills and the ability to work collaboratively in a team environment.

Education

Bachelor's degree in Computer Science, Software Engineering, or a related field.