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Ernst & Young

Global professional services: consulting, assurance, tax

Tech Lead Digital Engineering F/H

Full-Stack EngineeringUpdated on Nov 14
Full-timeParis, FranceIn-person

About the Job

Requirements

  • You have at least 5 years of experience and proven expertise on complex web projects, on both the back end and front end.
  • You have taken products from conception through production.
  • You have held a Tech Lead or technical-reference role, or have supervised development teams.
  • You can lead high-stakes projects and engage the team around objectives.
  • You can design robust, scalable architectures that account for business needs, performance constraints, security, and compliance requirements.
  • You already work with AI assistants and coding agents, and can assess their strengths, limitations, and industrialization through specifications, context, review, and testing.
  • You can make decisions on foundational topics in consultation with your team and in light of project constraints.
  • You are interested in both the rationale and implementation of products.
  • You can explain complex concepts to non-technical audiences, challenge needs, and propose a balance of value, cost, and quality.
  • You follow technological developments, share discoveries with your team, promote technical expertise across other disciplines, and help build its market recognition.
  • You have excellent command of TypeScript and at least one structured back-end framework, such as Nest.js.
  • You have a strong engineering craft culture, including Domain-Driven Design, clean code, data modeling, and automated testing.
  • You have practical experience with AI-assisted development, including coding agents and Spec-Driven Development.

Responsibilities

  • Provide technical direction for a multidisciplinary project team spanning development, design, product, and project management; design and ensure robust, scalable solutions aligned with client business needs.
  • Own the project's technical vision alongside the project manager; arbitrate foundational decisions on architecture, technologies, build, and make-or-buy, balancing timelines, budget, and value versus effort, and anticipate risks during scoping.
  • Structure the team's use of AI in development practices, including Spec-Driven Development (for example, through BMAD) and coding agents; establish safeguards for review, testing, security, and data confidentiality, and evaluate effects on productivity and quality.
  • Set and uphold team standards for conventions, automated testing, CI/CD, and code reviews; incorporate data protection under GDPR, accessibility under RGAA, eco-design under RGESN, observability, and AI Act compliance for agentic AI systems.
  • Focus on product value, understand users and business needs, challenge requirements with the Product Owner and designers, and propose pragmatic options such as MVPs, rapid prototypes, and iterations.
  • Advise clients as a partner by explaining technical issues, informing decisions, recommending target architectures, modernization paths, and technical-debt strategies, and contributing to scoping, estimation, and commercial proposals.
  • Supervise and coach the development team, build developers' capabilities including in new AI practices, and enable them to succeed.
  • Track technology developments, experiment, and share discoveries within the team and more broadly.
  • Depending on the assignment, work on demanding web applications spanning front-end frameworks, design systems, and Web Components through APIs; scalable back-end architectures, primarily using TypeScript; large-scale cloud and data platforms such as GCP, AWS, and Azure; generative-AI-enhanced products involving LLMs, RAG, agents, and MCP; and industrialized delivery pipelines involving CI/CD, containers, monorepos, and observability.

About the Company

Ernst & Young

Global professional services: consulting, assurance, tax

EY (Ernst & Young) provides professional services at a global scale, offering consulting, assurance, tax, and transaction advisory services. It serves clients across industries such as technology, media, real estate, hospitality, and construction. Instead of selling a single product, EY works with clients through tailored engagements where cross-disciplinary teams analyze challenges, design strategies, perform audits, help with tax planning, and assist with mergers or divestitures. What sets EY apart is its worldwide reach and integrated service model, industry-specific expertise, and focus on responsible business practices like sustainability, cybersecurity, and workforce flexibility. EY’s goal is to help organizations improve performance, manage risk, and achieve sustainable growth while building a better working world.

Company size
5,001-10,000
Company stage
Not listed
Total funding
Not listed
Headquarters
Boston, MA
Founded
1991

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