Top Software Engineer Jobs in Edinburgh

Designs and executes functional, integration, API, automated, exploratory, and end-to-end tests for personalization, recommendation, experimentation, and consumer intelligence capabilities. Builds test suites, validates AI-driven outputs and consumer journeys, manages test data, performs cross-browser testing, partners with engineering and product teams, and improves automation coverage, regression efficiency, and defect detection.

Evaluate AI coding-agent interactions for quality, engineering judgment, reasoning, explanations, and user trust. Provide clear written feedback, distinguish response-quality levels, help define evaluation standards, and record short video explanations. The role requires senior-level software engineering experience, strong TypeScript/JavaScript or Python skills, familiarity with OpenAI Codex, Claude Code, or Cursor, and excellent English communication.

Design, develop, and maintain high-performance consumer-facing web applications using React, TypeScript, and JavaScript. Lead frontend architecture, performance optimization, accessibility, reusable component development, API integration, experimentation, production troubleshooting, and CI/CD support. Collaborate with Product, Design, QA, Platform, and Architecture teams while mentoring engineers, conducting code reviews, supporting Agile delivery, and improving engineering quality and operational excellence.

Software Engineer role at Paddle, a global Merchant of Record and payments infrastructure company. The posting provides limited role-specific responsibilities or qualifications, but the position focuses on software engineering using Go. Paddle offers remote or hub-based work, professional development support, unlimited holidays, and inclusive workplace benefits.

Build BLP’s core software across infrastructure, backend, machine learning, and product extension platforms. Responsibilities include operating secure and observable cloud infrastructure, developing performant distributed systems, applying AI to business problems, and enabling customer process automation. The role emphasizes formal reasoning, correctness by construction, maintainable systems, type systems, and functional programming. Work is available onsite in Zurich or remotely within Europe.

Build and operate production AI infrastructure powering intelligent agents at scale. Develop high-performance Rust services for model inference, orchestration, and execution; design scalable distributed systems; establish MLOps, observability, guardrails, and failure recovery; and optimize latency, throughput, reliability, and cost. Partner with agent systems and infrastructure teams to turn prototypes into hardened services serving millions of users.

Build and maintain internal and public-facing APIs and services powering the Web App and developer experience. Develop API functionality, Admin API systems, WebSocket and REST behavior, and usage and billing integrations with Stripe. Investigate production issues and security vulnerabilities, write and review tested code, make technical decisions, and collaborate across engineering, Product, and Design teams.

Build and maintain scalable backend payment systems covering payment methods, fund capture, recipient creation, orchestration, transaction records, and fiat and crypto wallets. Improve secure payment flows across products, ensure observability through dashboards and alerting, and collaborate with backend, mobile, and full-stack teams. The role requires ownership of reliable, well-tested, maintainable APIs and services supporting high-volume cross-border money movement.

Build and architect scalable software using Ruby on Rails, React, and AWS. Lead full-lifecycle development, modernize legacy platforms, establish secure and reliable engineering practices, and promote AI-assisted development. Collaborate with product and engineering stakeholders, provide technical leadership, review code, mentor engineers, estimate work, and deliver roadmap initiatives through production. The role also emphasizes automated testing, CI/CD, system scalability, data accuracy, security, and regulatory alignment.

Lead the development of Runware's serverless platform by building core systems for AI workload management and providing technical guidance to the team.

Lead development of Runware’s AI platform, including scalable backend APIs, SDKs, developer tools, and inference orchestration systems. Design high-performance distributed architectures, optimize image and video model integrations, improve reliability and observability, shape technical direction, and mentor engineers. Collaborate across platform, infrastructure, and product teams to deliver robust developer experiences and maintainable systems.

Build and operate full-stack web applications end to end, from technical design through production release and support. Direct and verify coding agents, create tests and safeguards, review changes for design and security, respond to production issues, maintain alerting and runbooks, and document systems. The role requires strong ownership, independent technical judgment, collaboration, and excellent English communication. Vue, TypeScript, AWS serverless, EdTech, and UI/UX experience are useful but not required.

Principal Software Engineer responsible for solving complex platform and infrastructure challenges, defining multi-year architecture, and leading foundational initiatives across the software platform. The role focuses on APIs, abstractions, system architecture, scalability, software quality, and engineering velocity. The engineer will identify architectural bottlenecks, drive initiatives from design through deployment, serve as a technical escalation point, build consensus across teams, and mentor engineers.

Diagnose and verify long-tail Firefox WebCompat bugs, reproduce and triage site-breakage reports, write WebCompat interventions, and implement simple AI-assisted fixes. The role converts reported breakages into actionable or resolved bugs and requires strong HTML, CSS, JavaScript, browser DevTools, and cross-browser debugging skills.

Lead the technical direction and architecture of the Foundations platform team, owning authentication, authorization, SSO, secrets management, tenancy, and core platform services. Design APIs, drive services through launch, make technical decisions, establish engineering standards, and mentor engineers without formal management authority. Partner with engineering and product leaders to align execution with priorities.

Develop and maintain scalable, reliable software across frontend and backend platforms. Lead technical design and delivery, collaborate with product and business teams, improve testing and CI/CD practices, review code, and mentor junior developers. Build and maintain AI-powered product features while addressing model evaluation, security, moderation, consistency, and fallback strategies. Apply strong engineering fundamentals across system design, performance optimization, debugging, databases, and cross-platform development.

Senior backend engineer responsible for designing, coding, and operating highly available distributed identity systems for Affirm’s international markets. The role includes owning quarterly goals, delivering scalable features in Kotlin and Python, collaborating across product and engineering teams, improving code and design standards, monitoring system availability, resolving production issues, mentoring engineers, and supporting technical planning and hiring.

Design, build, and operate scalable backend services for pricing and promotions across multiple customer channels. Develop Java or Kotlin microservices, Kafka-based event-driven systems, GraphQL and REST APIs, and resilient low-latency data solutions using MongoDB, Redis, and PostgreSQL. Own complex backend features throughout their lifecycle while supporting API governance, reliability, performance, and reusable platform capabilities.

Build and operate secure, scalable authentication, authorization, and identity services serving millions of customers and colleagues. Responsibilities include end-to-end feature ownership, backend API development, solution design, testing, deployment, monitoring, production support, technical direction, code reviews, and engineering best-practice development. The role requires strong distributed systems, cloud-native engineering, DevOps, CI/CD, and identity standards experience.

Design, develop, test, deploy, and operate backend software supporting contact centre services. Build Java APIs, integrations, data flows, and event-driven solutions connecting platforms such as Zendesk, Twilio, Azure, and Google. Develop customer self-service and FAQ capabilities, collaborate with cross-functional stakeholders, and own solutions throughout the delivery lifecycle while maintaining security, performance, reliability, and maintainability.

Build and evolve scalable Python services powering M&S paid media and personalisation campaigns across web, mobile, email, push, and paid social. Develop integrations for audience activation, bidding, and budget management; implement experimentation, attribution, and measurement frameworks; and use large-scale data to improve marketing performance, media efficiency, and customer outcomes.

Design and evolve backend-heavy experimentation platform capabilities, including APIs, services, automation pipelines, and developer tooling. Set technical direction, build self-service tools, operate reliable distributed systems on Azure, and establish observability and safe-change practices. Partner with product and engineering teams, document systems and standards, and mentor engineers across experience levels.

Design, develop, test, deploy, and support scalable order management capabilities across checkout, fulfilment, returns, amendments, and cancellations. Own features end to end while improving architecture, integrations, automation, observability, resilience, monitoring, security, and operational support. Collaborate with product, engineering, and fulfilment stakeholders to modernize enterprise systems and improve delivery outcomes.

Lead design and delivery of scalable, secure payment platform capabilities. Own reliability, performance and resilience, drive DevOps/CI-CD, observability and incident management, and mentor engineers to improve platform engineering practices.

Provides technical leadership for hospitality technology platforms, defining architecture and technical strategy across multiple teams. Designs scalable distributed systems, reusable platforms, tooling, and services while improving resilience, observability, incident management, and performance. Partners with architects, vendors, engineers, and stakeholders on technology decisions and investment priorities. Mentors engineers, promotes engineering excellence, and contributes to recruitment and technical community development.