Principal Software Engineer​/Tech Lead

Principal Software Engineer / Tech Lead

Department: Software Engineering

Employment Type: Full Time

Location: Leeds - Hybrid

Reporting To: Tech Director

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 that blends deep technical expertise with strategic consultancy. You’ll be working at the earliest stages of client engagements - helping uncover the real problems, defining the right approach, and proposing commercially viable, technically sound solutions without needing to escape for support. You’ll represent Parallax with confidence, pitch ideas persuasively, and guide both clients and internal teams from initial scoping through to architecture, delivery and optimisation.

Equally comfortable in the code and leading client workshops, you’ll set the technical direction while working in squads to build products for our clients.

Our clients are diverse, operating across multiple sectors and geographies, often targeting global audiences. You must be able to adapt your technical approach to fit existing technology stacks and standards - or define new ones entirely. Working at a strategic level, you will influence project roadmaps, craft Statements of Work and contribute directly to winning new engagements.

• Technical Strategy & Architecture:
  Define and develop the long‑term software architecture strategy; establish and maintain best‑practice design patterns, coding standards and technical guidelines across multiple projects.
• Discovery & Requirements:
  Lead technical discovery workshops with senior stakeholders, unpicking complex requirements, mapping system dependencies and aligning solutions to business objectives.
• Hands‑On Development & Delivery:
  Balance strategic oversight with hands‑on coding—designing, building and deploying critical features; conducting code reviews; and ensuring high performance, security and scalability.
• Dev Ops & Operational Excellence:
  Oversee CI/CD pipelines, infrastructure as code, automated testing and monitoring to drive operational resilience and rapid iteration.
• Quality Assurance & Best Practice:
  Champion test‑driven development, continuous integration, automated testing frameworks and peer review processes to uphold code quality.
• Cross‑Functional
  
  Collaboration:
  
  Work closely with UX designers, product managers and QA specialists to deliver quality outcomes
• Thought Leadership:
  Represent our Technology Practice internally and externally—presenting at client meetings, industry events and contributing to the broader engineering community on emerging trends and innovations.

• Demonstrable experience delivering or building AI applications.
• Strong Next.js or equivalent Java script framework, React and AWS experience.
• Balance leadership with hands‑on software development, working with teams to create and ship high‑quality solutions.
• Identify strategic opportunities and contribute to proposals, estimates and Statement of Work scoping.
• A deep understanding of software architecture principles, design patterns and system integration.
• Solid experience with Dev Ops, CI/CD pipelines, containerisation and automation tooling.
• Expertise in Agile/Scrum methodologies and iterative delivery practices.
• Strong quality assurance mindset, including test‑driven development and peer code reviews.
• Ability to unpick and resolve complex technical problems, architecting scalable, maintainable solutions.
• Exceptional communication skills, comfortable presenting technical concepts and recommendations to senior stakeholders.
• Ability to establish and evolve technical standards, guidelines and reusable component libraries.
• High emotional intelligence and consultancy mindset for managing client relationships and expectations.

• You possess a strong strategic mindset and outstanding interpersonal skills, enabling effective collaboration at all organisational levels.
• You excel under pressure, managing multiple complex work streams while inspiring and guiding your team.
• You are self‑motivated, highly organised and eager to challenge the status quo, driving continuous improvement…