About the role
At Parallax, we celebrate the curious. The people who love getting stuck into tough challenges and building technology that genuinely moves the needle and demonstrates the art of the possible.
We’re looking for a Senior Software Engineer with a passion for building great products to join our growing team.
You’ll spend most of your time writing code, solving complex technical challenges, and working collaboratively with UX designers, engineers and others across multiple projects — with some of your time focused on improving how we deploy, scale, and monitor our applications.
Our clients are diverse, operating across multiple sectors and geographies, often targeting global audiences. We’re innovators at heart, we work with technology that we’re passionate and excited about and use it to produce software and products that our customers love.
Key Responsibilities
Work as part of a cross-functional squad to design, build and ship high-quality digital and AI-native products for our clients
Take ownership of complex technical challenges — unpicking problems and proposing well-structured, pragmatic solutions
Write clean, maintainable, and well-tested code in languages and frameworks such as Node.js, TypeScript, and React. We also use other open-source languages and frameworks.
Contribute to estimates and technical planning alongside your team and the Client Lead
Communicate clearly and confidently with both technical and non-technical people — from clients to internal stakeholders — to explain ideas, trade-offs, and recommendations
Implement and improve CI/CD pipelines using GitHub Actions
Support the design, deployment, and monitoring of cloud infrastructure - primarily on AWS (ECS, ECR, Lambda, CloudFront, RDS, etc.) and Azure (you don’t need to be an expert but being interested helps!)
Promote strong engineering practices around code quality, automated testing, peer reviews, observability, and security and help instil a culture of quality and accountability in engineering.
Collaborate closely with designers, product managers and QA to ensure solutions are user-focused, technically sound, and aligned with client needs.
About You
You possess a strong strategic mindset and outstanding interpersonal skills, enabling effective collaboration at all organisational levels.
You excel under pressure, managing multiple complex workstreams while inspiring and guiding your team.
You are self-motivated, highly organised and eager to challenge the status quo, driving continuous improvement in your own work and that of others.
You have a deep passion for software engineering, meticulous attention to detail and a commitment to delivering solutions that drive tangible business outcomes.
You show pragmatism around balancing the need for process and achieving outcomes.
Key Skills
What you need to have:
Strong software engineering background with ideally 3+ years of experience building and maintaining production‑grade systems.
A passion for Artificial Intelligence and continuous learning in the rapidly evolving landscape of Generative AI.
Experience building AI‑native products, including integrating LLMs (OpenAI, Anthropic, Llama) and implementing AI‑assisted development workflows.
Strong hands‑on experience with modern JavaScript/TypeScript frameworks (Next.js, React).
Excellent communication skills and emotional intelligence; able to translate complex AI concepts (like latency, context windows, or hallucinations) for non‑technical stakeholders.
A collaborative mindset. You enjoy working closely with UX designers, delivery managers, product managers and other engineers.
Confident problem‑solver able to troubleshoot non‑deterministic systems and guide others on effective Prompt Engineering and model evaluation strategies.
Flexibility to adapt your technical approach to fit existing technology stacks while integrating cutting‑edge AI tools and vector databases.
Proficient with CI/CD pipeline design and automation using tools such as GitHub Actions
Passion for code quality, with a strong understanding of TDD, automated testing, and peer review processes.
Familiarity with security best practices in cloud environments.
Nice to haves
Don't worry if you don't have any of the following experiences, we'd still like to hear from you):
Curiosity about mentoring or progressing toward a Principal Tech Lead role
Experience working with AWS and/or Azure cloud environments
Experience using infrastructure as code (Terraform and AWS CDK)
Good understanding of monitoring, logging, and alerting (Prometheus, Grafana, CloudWatch etc.)
Benefits
Private medical healthcare (Bupa)
4% matched pension
Hybrid working (flexible, office time not mandated but required for workshops/team events)
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
Diversity Statement
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.
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