Lead Software Architect

Join to apply for the Lead Software Architect role at Mission.dev

This range is provided by Mission.dev. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

£115,000 - £130,000. annually

This is a remote full-time employment role with direct hiring by the client.

Open to candidates based in the UK only.

Mission is a platform for hiring, vetting, and managing software development talent.

It enables our clients to connect with the world’s best talent to build mission‑critical software products.

This organization is a next‑generation betting platform built for the modern fan.

It brings together a team of engineers and designers who are passionate about creating the most engaging and intuitive sports book and casino experience available today.

The platform is designed to bring users closer to the games they love, combining cutting‑edge technology with an immersive product that captures the excitement and thrill of winning.

The team’s mission is to redefine what a contemporary betting experience can be—fast, seamless, and tailored to today’s digital audience's expectations.

The Lead Platform Engineer is responsible for the reliability, scalability, and performance of the core platform.

You will guide architectural direction, lead complex infrastructure initiatives, and drive improvements across deployment pipelines, observability, and systems design.

This role includes contributing hands‑on code, serving as the technical escalation point, and partnering with internal teams and external vendors to ensure safe and scalable integrations.

The organization's platform is primarily built in Python and hosted on AWS, incorporating Flask, Pytest, Mypy, Docker, Postgre

SQL, SQS, S3, and Terraform.

They deploy daily.

• Own platform architecture and ensure high availability, resilience, and scalability.
• Lead design and delivery of cross‑team projects affecting core infrastructure.
• Improve deployment workflows, monitoring, and performance across the platform.
• Anticipate scaling and failure scenarios, ensuring robust system design.
• Establish and promote best practices in reliability, testing, and operations.
• Contribute code, conduct reviews, and ship production changes daily.
• Manage integrations with third‑party systems in a secure and repeatable manner.
• Collaborate with product, design, backend, frontend, and trading teams to align platform decisions with business goals.
• Manage and develop a small engineering team, fostering high performance and strong technical judgment.
• Mentor engineers across the organization, strengthening delivery, architecture, and decision‑making.
• Lead technical discussions, planning sessions, and delegation to maintain pace and quality.
• Drive ownership and accountability across the Platform function.
• Participate in hiring and help shape the platform engineering discipline.
• Reinforce a culture focused on reliability, quality, and continuous improvement.

• 7+ years of engineering experience, with deep proficiency in Python and cloud‑native systems.
• Experience leading or managing engineers in platform, backend, or infrastructure roles.
• Strong track record building scalable, resilient, distributed systems.
• Ability to turn ambiguous technical problems into clear, actionable plans.
• Demonstrated impact on improving reliability, performance, and developer experience.
• Hands‑on leadership with strength in both coding and architectural thinking.
• Strong communication and cross‑functional collaboration abilities.
• Experience integrating third‑party systems at scale.
• Familiarity with modern delivery practices and a strong commitment to quality and testing.
• Must be based in the UK.
• Shape our future:
  Play a key role in our team's success, where your voice matters, and you'll have a direct impact on shaping our company's future.
• Connect and unwind:
  Take part in our quarterly gatherings where our community comes together to bond and have fun.
• Comprehensive health coverage:
  Look after your well‑being with our outstanding zero‑excess health insurance plan, which includes optical and…