Job Description

###

Description

We're hiring a Principal Software Engineer/Tech Lead to help shape the future of our most ambitious client projects.

This is a senior, hands-on role focused on technical excellence, leadership, and problem solving. You'll play a key role in shaping the technical direction of projects--helping to design architecture, guide engineering teams, and ensure delivery of scalable, maintainable software solutions. You'll be a trusted technical lead for client work, collaborating closely with internal teams to define and deliver great outcomes.

Comfortable in both code and conversation, you'll lead by example in engineering squads, mentoring others, setting technical standards, and rolling up your sleeves to tackle complex challenges.

You'll work across a range of industries, platforms and technologies, so we're looking for someone who can think critically, adapt quickly, and help steer projects toward technical excellence.###

Key Responsibilities

Technical Strategy & Architecture: Shape the technical vision for projects, designing robust, scalable architectures and establishing best-practice patterns and technical guidelines. Discovery & Requirements: Participate in technical discovery sessions, collaborating with internal teams to clarify requirements, map system dependencies, and translate business goals into sound technical approaches. Hands-On Development & Delivery: Lead by example through active coding--designing and building high-quality features, performing code reviews, and working with others to ship reliable, performant software. DevOps & Operational Excellence: Support infrastructure decisions, CI/CD pipelines, and operational tooling to ensure smooth delivery and maintainability of systems. Quality Assurance & Best Practice: Promote strong development practices including automated testing, peer reviews, and iterative delivery. Help instil a culture of quality and accountability in engineering. Cross-Functional Collaboration: Work closely with designers, product managers and QA to ensure solutions are user-focused, technically sound, and aligned with client needs. Technical Leadership & Mentorship: Coach and support other engineers, contributing to a learning culture where best practices are shared and innovation is encouraged.
###

Skills, Knowledge and Expertise

Strong hands-on experience with modern JavaScript/TypeScript frameworks, especially Next.js, React and React Native. Demonstrable experience building or delivering AI-enabled features or products. Solid understanding of software architecture, design principles and systems integration. Experience building scalable APIs, distributed systems, or cloud-native applications. Practical knowledge of DevOps practices, CI/CD pipelines, infrastructure as code, and containerisation. Passion for code quality, with a strong understanding of TDD, automated testing, and peer review processes. Confident problem-solver able to troubleshoot complex systems and guide others to effective technical solutions. Familiar with Agile/Scrum methodologies and iterative delivery in cross-functional teams. Excellent communication skills with the ability to articulate ideas clearly to both technical and non-technical audiences. Able to help define and evolve reusable components, technical standards and internal best practices. A collaborative, supportive approach to team leadership and knowledge sharing.
###

Benefits

Private medical healthcare (Bupa) 4% matched pension Hybrid working (2 days in the office) Flexible working Quarterly company Hack Days 1 professional development day per month City centre office 25 days annual leave + bank holidays + up to 5 loyalty days Team events Enhanced maternity leave (12 weeks full pay, followed by 27 weeks of SMP) Enhanced paternity leave (3 weeks at 90% salary) 2 streaming services or gym membership subsidised


###

About Parallax

Parallax is a digital transformation consultancy with innovation at its core. We solve complex problems and build leading digital products for local and national SMEs, international clients and blue-chip corporations.

We transform ideas into opportunities, using cutting-edge user experience design, technical innovation, and our passion for digital excellence. We don't shy away from projects that seem too out of reach, unachievable or even impossible. We welcome the challenge and deliver success.

We're always questioning the norm and understand the risks of the latest and greatest and know how to deliver large digital projects at the forefront of technical possibility with a balanced approach to risk mitigation. Our clients trust us to deliver a transformative user experience married with technical excellence across various projects and industry sectors.

Our team features some of the most talented minds in the industry. We work hard to stay on top of the newest innovations and always strive to be the best at what we do.
We believe that our brand, people and behaviours are a powerful platform for social change in the tech industry. Our mission is to become the clear choice for all employees, candidates and clients, bringing out the best in people and giving everyone an equitable chance to find fulfilment in their careers. Parallax values and respects all differences in people (seen and unseen) and encourages applications from all backgrounds, communities and industries. We are committed to having a team that is made up of diverse skills, experiences, abilities and backgrounds. If you are not 100% sure that you meet all the requirements but believe you could excel in this role, we encourage you to apply and use the application questions to tell us about what you would bring to this role.