Lead Software Engineer - AI Modernization at Theodo | Paris

Theodo at a Glance Since 2009, Theodo has partnered with forward-thinking companies to design, build, and launch digital products. The team combines technology expertise with Lean methodology to deliver results that matter. Theodo’s approach stands on three principles: Deep expertise in essential technologies for product design and development Consistent focus on creating value for clients at every project stage Recruiting top digital talent and fostering their growth through Lean practices Over the past 15 years, Theodo has grown to a team of more than 700, with most roles in software engineering and a shared drive for continuous improvement. The group is organized into specialized units by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, Healthtech, Consumer Products Goods). Theodo aims to reach €100M in revenue by 2025. About the AI Modernization Practice The AI Modernization team leads Theodo’s efforts to become a European leader in applying AI to software development. This practice focuses on using AI to migrate legacy systems to modern languages and frameworks. The goal: reduce business, cybersecurity, and compliance risks tied to outdated systems. By combining controlled AI with a proven approach, the team delivers critical projects up to three times faster than traditional methods. The Team Structure Join a community of over 350 Theodoers: software engineers, tech leads, engineering managers, and architects. Theodo encourages daily learning and knowledge sharing across this network. Project teams are tailored for each client. As a Lead Software Engineer - AI Modernization, you’ll work in a small group of 4 to 5 people, typically including Software Engineers, a Tech Lead, and a Product Manager. Teams collaborate closely with clients, sharing updates, exploring challenges, and adapting products to user needs. The field of software engineering is changing with AI. This is a chance to develop as an AI-Native Tech Lead. Location Role based in Paris.

Join Theodo and Be Part of Our Success Story!Since 2009, Theodo has been empowering innovative companies in the design, development, and deployment of ingenious digital products, leveraging the best technology and Lean methodologies.Our distinctive approach is founded on three key principles:- We have cultivated recognized expertise in essential product design and development technologies;- Regardless of the project's phase, creating value for our clients is our top priority in every decision;- We recruit the finest digital talents and foster their ingenuity through Lean practices.Theodo has experienced remarkable growth over the past 15 years: our teams comprise over 700 Theodoers, primarily Software Engineers passionate about technology and continuous improvement. With this growth, the group has organized into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) or by industry (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.Your Team:You will join a community of over 120 tech enthusiasts at Theodo: software engineers, tech leads, engineering managers, and architects, where you can share ideas, learn, and grow every day. At Theodo, our tech teams work in project groups tailored to the unique needs of each client. You will be part of a small team of Theodoers (4 to 5 members), including Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with the client through regular communications to share progress, deepen the understanding of their challenges, and evolve the product to meet user needs effectively. Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will involve designing and developing useful, high-performing, and sustainable digital products to address the challenges faced by our clients and their users.

About Theodo Since 2009, Theodo has partnered with forward-thinking companies to design, build, and launch digital products using advanced technology and a Lean mindset. Theodo’s approach centers on three principles: Deep expertise in core technologies for product design and development Focus on delivering value at every project stage and decision Attracting and nurturing top digital talent through Lean practices Over the past 15 years, Theodo has grown to more than 700 team members, most of whom are Software Engineers dedicated to technology and continuous improvement. The company is structured into specialized units by technology (such as Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (including Fintech, Govtech, Healthtech, and Consumer Products Goods). By 2025, Theodo aims to reach €100M in revenue. AI Modernization at Theodo The AI Modernization practice stands as the Group’s flagship offering. This team drives Theodo’s ambition to become Europe’s leader in AI for software development. The mission: accelerate the migration of legacy systems to modern languages and frameworks, helping clients reduce business, cybersecurity, and compliance risks. Using a controlled approach to AI and a proven methodology, these projects are delivered three times faster than traditional methods. Your Team Join a tech community of over 350 Theodoers: software engineers, tech leads, engineering managers, and architects. This is a place to exchange ideas, learn, and grow every day. At Theodo, tech teams form project groups tailored to each client’s needs. As a Lead Fullstack Engineer, work within a small team of 4 to 5 members, including Software Engineers, a Tech Lead, and a Product Manager. Collaboration with clients is close and ongoing, with regular discussions to share progress, deepen understanding of challenges, and adapt products to serve users effectively. Software Engineering is evolving with AI. At Theodo, there is an opportunity to develop as an AI Native Tech Lead.

About Theodo Since 2009, Theodo has partnered with companies to design, build, and launch digital products using leading technologies and a Lean approach. Over 700 team members, mainly software engineers, drive continuous improvement and technical excellence. Theodo’s growth has led to specialized groups focused on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries such as fintech, govtech, healthtech, and consumer products. The company aims to reach €100M in revenue by 2025. AI Modernization at Theodo The AI Modernization practice stands at the center of Theodo’s strategy to lead in AI-driven software development across Europe. This team helps clients move legacy systems to modern languages and frameworks with AI, reducing business, cybersecurity, and compliance risks tied to outdated technology. Using a proven methodology and controlled AI, these projects are delivered up to three times faster than traditional approaches. How the Team Works Theodo’s tech community brings together software engineers, tech leads, engineering managers, and architects. Teams form around project needs, combining engineering and product management skills. Collaboration with clients is close and ongoing: teams share updates, deepen their understanding of client challenges, and adapt products to fit user needs. About the Role: Engineering Manager for AI Modernization The Engineering Manager will join the AI Modernization practice in Paris. This role manages up to four tech leads and oversees the success of four projects, working alongside a Group Project Manager. The position involves supporting technical teams, guiding project delivery, and contributing to Theodo’s mission of accelerating legacy system modernization with AI.

Theodo: Pioneering Success since 2009Since its inception in 2009, Theodo has been at the forefront of assisting innovative companies in designing, developing, and deploying ingenious digital products, leveraging cutting-edge technology alongside a Lean approach.Our distinctive methodology is anchored in three core principles:- We have cultivated recognized expertise in key product design and development technologies;- At every project stage, our primary focus is on delivering value to our clients;- We hire top digital talent and nurture their ingenuity through Lean practices.With remarkable growth over the past 15 years, Theodo now boasts a team of over 700 skilled professionals, primarily Software Engineers, driven by technology and continuous improvement. As we expand, our organization has structured into specialized entities based on technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industry sectors (Fintech, Govtech, Healthtech, Consumer Products). We project to generate €100M in revenue by 2025.Your Future Responsibilities:As a Lead Product Manager, you will oversee complex product projects by driving the product vision, orchestrating delivery, and ensuring value creation for both clients and teams. - Define and implement the product strategy in partnership with clients: value modeling, product architecture, EPICs, trade-off decisions, and technical-functional alignment.- Ensure successful delivery by coordinating multiple squads to deliver complex projects on time, within budget, and meeting quality standards.- Create conditions for team success by defining the right setup (Theodo teams or partners), negotiating necessary resources, and adjusting the organization to meet project constraints.- Provide visibility and clarity through tailored governance structures to align all stakeholders.

Join Theodo's Journey of InnovationSince 2009, Theodo has been at the forefront of supporting innovative companies in designing, developing, and deploying ingenious digital products, utilizing cutting-edge technology and a Lean approach.Our unique methodology is built upon three core principles:- We have honed recognized expertise in key product design and development technologies;- Our top priority is to create value for our clients, regardless of the project stage;- We recruit the best digital talents and cultivate their ingenuity through a Lean approach.With exceptional growth over the past 15 years, Theodo now employs over 700 talented individuals, primarily Software Engineers passionate about technology and continuous improvement. As we expand, the group has structured into specialized entities based on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to achieve €100M in revenue.Your Future Responsibilities:As a Product Manager, you will collaborate with the team to maximize product value by prioritizing and delivering high-quality features that enhance customer satisfaction.- Prioritize and deliver high-value features while adhering to milestones and commitments made to the client.- Showcase the team's value and progress by making work visible and facilitating client decisions (review decks, daily updates, etc.).- Understand client preferences and organize a swift and appropriate response in case of issues, leveraging tools such as the value model, client questionnaires, and problem-solving methodologies.- Manage daily delivery by applying Lean methodology: backlog management, writing clear user stories, and sprint planning.

Role Overview Theodo is hiring a Lead Software Engineer to join its Paris office. This role involves leading a team of developers on impactful projects, shaping software solutions with modern technologies, and setting a high standard for quality. What You Will Do Guide a team of engineers through all stages of software development Work closely with team members to deliver reliable, well-crafted solutions Apply current technologies and development practices to real-world challenges Mentor and support developers in their growth Encourage open communication and foster a collaborative team spirit Who We’re Looking For Strong technical background in software engineering Experience leading or mentoring development teams Clear communicator who can motivate and inspire others Comfort working in Paris or relocating to the city

Role Overview Theodo is hiring a Lead Software Engineer in Paris. This role involves guiding software development projects and supporting a team of engineers. The position focuses on designing and building reliable, high-performance software that meets client expectations. What You Will Do Lead software projects from planning through delivery Work hands-on with the team to design and implement technical solutions Collaborate with colleagues from different functions to align on project goals Oversee project timelines and ensure milestones are met Mentor junior developers and encourage knowledge sharing Team and Culture This role supports a culture of continuous learning and improvement. The team values technical skill, open communication, and a shared commitment to delivering strong results for clients. Location This position is based in Paris.

Role Overview Theodo is hiring a Lead Software Engineer for its fintech division in Paris. This role centers on guiding a team of developers to build and deliver software products for the financial sector. The position combines hands-on technical leadership with team mentorship and cross-team collaboration. What You Will Do Lead and mentor a team of software engineers focused on fintech projects Drive the design and development of new software applications for financial services Work closely with product, design, and other teams to deliver reliable, high-quality solutions Promote a culture of technical excellence and ongoing improvement within the team Location This position is based in Paris.

About Theodo Since 2009, Theodo has helped innovative companies design, build, and launch digital products using advanced technology and a Lean mindset. Our approach rests on three principles: Deep expertise in key product design and development technologies Relentless focus on creating value for clients at every project stage Recruiting top digital talent and nurturing their creativity with Lean practices Theodo has grown steadily over the past 15 years. Today, more than 700 team members, mostly Software Engineers, work across specialized groups focused on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to reach €100M in revenue. AI Modernisation at Theodo The AI Modernisation practice is central to our vision of becoming the European leader in AI for software development. This team focuses on using AI to speed up the migration of legacy systems to modern languages and frameworks, reducing risks linked to outdated technology, cybersecurity, and compliance. With strong AI skills and a proven process, we deliver these projects up to three times faster than traditional approaches. Your Team Join a tech community of over 350 Theodoers: software engineers, tech leads, engineering managers, and architects. Knowledge sharing and daily learning are part of the culture. Project teams are built around each client's needs, typically including 4 to 5 members, Software Engineers, a Tech Lead, and a Product Manager. Teams work closely with clients, meeting regularly to discuss progress, understand challenges, and adapt the product for real user needs. Software Engineering is changing with AI. This is a place to grow into an AI-Native Tech Lead.

Theodo: Pioneering Digital TransformationSince 2009, Theodo has empowered innovative companies to design, develop, and deploy ingenious digital products, leveraging cutting-edge technology and a Lean approach.With exceptional growth over the past 15 years, Theodo now boasts a team of over 700 passionate Software Engineers dedicated to continuous improvement. Our expansion has led to specialized divisions (Theodo Apps, Theodo Cloud, Theodo Data & AI) focused on various technologies and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to achieve a revenue of €100M.Theodo Data & AI: Innovating with Intelligence Established in 2016, Theodo Data & AI is dedicated to guiding clients in shaping and executing their data strategies while developing state-of-the-art artificial intelligence solutions. Our growth trajectory is impressive, with over 30% annual revenue growth, creating exciting opportunities for our team.Join Our Dynamic Team:We work collaboratively across our projects, with the Lead Data & AI Engineer, Data & AI Engineer, and Product Manager ensuring impactful results for our clients.We are seeking a Data & AI Engineer to work across our Data Engineering and Data Science initiatives.- Data Engineering: Focus on data architecture, pipeline construction/migration, and data warehousing to ensure reliable data extraction, transformation, and usability.- AI/Data Science: Involve in predictive modeling, machine learning, computer vision, and MLOps.Your Responsibilities:- Deliver high-quality code within deadlines, ensuring best practices (testing, refactoring) and effective debugging for sustainable solutions.

About the Role Theodo Paris is looking for a Lead Technology Expert in AI. This position involves guiding a team to build advanced applications that use artificial intelligence. The role centers on providing technical leadership, supporting project delivery, and helping define the company's technology direction. What You Will Do Lead a team of engineers working on AI projects Oversee the development of applications that use artificial intelligence Help shape Theodo's technology roadmap Ensure projects meet client requirements and are delivered successfully Location This role is based in Paris.

Join Theodo as a Lead AI EngineerAt Theodo, we have been supporting innovative companies since 2009 in the design, development, and deployment of cutting-edge digital products by leveraging the best of technology and Lean methodologies.With 15 years of exceptional growth, Theodo boasts a team of over 700 passionate software engineers committed to continuous improvement. Our organization has diversified into specialized entities focusing on technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to generate a revenue of €100 million.Established in 2016, Theodo Data & AI is dedicated to assisting clients in shaping and implementing their data strategies, alongside researching and developing state-of-the-art artificial intelligence solutions.Our company is thriving: Theodo Data & AI experiences over 30% annual revenue growth, creating exciting new opportunities for our team members!

About Theodo Healthtech Theodo Healthtech builds digital solutions for the healthcare sector from its Paris office. The team focuses on applying artificial intelligence to real-world healthcare challenges. Role Overview: AI-Native Software Engineer This position centers on designing, building, and refining AI-powered applications for healthcare. The AI-Native Software Engineer works closely with colleagues from various disciplines to create tools that support better patient outcomes and more efficient healthcare operations. What You Will Do Collaborate with cross-functional teams to develop AI-driven applications for healthcare Design, implement, and optimize software that supports patient care and streamlines processes What We Look For Solid background in software engineering Strong interest in artificial intelligence technologies Motivation to improve healthcare through technology This role is based in Paris.

Join Theodo as an Engineering Manager in Paris!Since 2009, Theodo has been a driving force in supporting innovative companies with the design, development, and deployment of ingenious digital products, leveraging cutting-edge technology and a Lean approach.Theodo has experienced remarkable growth over the last 15 years, now boasting a team of over 700 passionate software engineers dedicated to continuous improvement. As we expand, we have structured our organization into specialized entities focusing on different technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Goods). By 2025, we anticipate generating €100M in revenue.Theodo Data & AI, established in 2016, is dedicated to data and AI solutions. Our mission is to guide clients in crafting and executing their data strategies, along with researching and developing state-of-the-art artificial intelligence solutions.Our company is on an upward trajectory, with Theodo Data & AI seeing over 30% annual revenue growth, creating exciting new opportunities for our team!The technical team at Theodo comprises 120 software engineers, tech leads, and architects from top engineering schools, supported by 13 Engineering Managers dedicated to their success.Your mission includes:- Leading and mentoring Tech Leads: You will support 1 to 4 Tech Leads in enhancing their skills and achieving personal growth.- Ensuring technical delivery: You will guarantee code quality (3S: stability, security, speed), adherence to milestones, and architectural robustness.- Contributing to business development: You will participate in strategic discussions with clients (CIOs, sponsors, etc.), help identify opportunities, and play a key role in pre-sales with our sales team.Your tools for success:• Direct management by Theodo's CTO or VP of Engineering• Lean management training from top Lean coaches• Access to advanced technology and resources to support your team's success

Theodo Group: A Journey of Innovation and SuccessSince 2009, Theodo has been dedicated to supporting innovative companies in the design, development, and deployment of ingenious digital products, leveraging the best of technology and Lean methodologies.With over 15 years of exceptional growth, Theodo has expanded to a team of more than 700 passionate software engineers committed to continuous improvement. As we scale, we have structured ourselves into specialized units focused on various technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo aims to achieve a revenue of €100 million.Established in 2016, Theodo Data & AI serves as the data and AI division of Theodo. Our goal is to partner with clients in shaping and deploying their data strategies, as well as researching and developing state-of-the-art AI solutions.The company is experiencing rapid growth, with Theodo Data & AI recording an annual revenue increase of over 30%, creating exciting new opportunities for our team!Why We Are Hiring a Lead Data Software Engineer?To contribute to the growth of Theodo Data & AI and to strengthen our Data Software Engineering teams, we are seeking an experienced professional.

Join Theodo as a Strategic Account Lead!Since 2009, Theodo has been at the forefront of innovation, partnering with forward-thinking companies to design, develop, and launch cutting-edge digital products utilizing the best technology and Lean methodologies.With over 15 years of exceptional growth, Theodo has expanded its talented workforce to include more than 700 passionate Software Engineers committed to technology and continuous improvement. Our organizational structure now comprises specialized entities focusing on various technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to achieve a revenue milestone of €100 million.Theodo Data & AI, established in 2016, serves as the data and AI division of Theodo. Our mission is to assist clients in crafting and executing their data strategies while researching and developing state-of-the-art AI solutions.Experience our remarkable growth: Theodo Data & AI has been achieving over 30% annual revenue growth, unlocking exciting opportunities for our team members!

Discover Theodo's Journey and SuccessSince 2009, Theodo has been empowering innovative companies in crafting, developing, and launching ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our distinctive methodology is built upon three core principles:- We have honed acknowledged expertise in key technologies for product design and development;- At every stage of the project, our priority is to create value for our clients;- We recruit the finest digital talents and nurture their ingenuity through a Lean approach.Theodo has experienced remarkable growth over the past 15 years, gathering over 700 passionate Theodoers, primarily Software Engineers dedicated to technology and continuous improvement. As we expand, our group has organized into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to achieve a revenue of €100M.Your Future Team:You will join a community of over 120 Theodo tech professionals: software engineers, tech leads, engineering managers, and architects, where you can exchange, learn, and grow daily.At Theodo, tech teams work on project-based teams, tailored to meet each client's needs. You will be part of a small team of Theodoers (4 to 5 members), including Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with the client, with regular updates to share progress, deepen understanding of their challenges, and evolve the product to align with user needs.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop valuable, high-performance, and sustainable digital products to address the challenges faced by our clients and their users.

Join Theodo as an LLM-Powered Software EngineerAt Theodo, we have been at the forefront of digital product development since 2009, empowering innovative businesses to design, develop, and deploy ingenious digital products through cutting-edge technology and Lean methodologies.Our unique approach is grounded in three core principles:- We have cultivated recognized expertise in key technologies for product design and development;- Regardless of project phase, our priority is to create value for our clients with every decision;- We recruit the best digital talent and nurture their ingenuity through our Lean approach.Theodo has experienced exceptional growth over the past 15 years, with over 700 Theodoers, primarily Software Engineers, who are passionate about technology and continuous improvement. As we expand, we have structured our teams into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, Healthtech, Consumer Goods). By 2025, Theodo aims to achieve €100M in revenue.Your Future Responsibilities:Join our Business Critical Migration team as we support our clients in migrating legacy systems to modern, robust stacks using LLM and agentic workflows.You will collaborate with product and tech teams of 4 to 6 members, including Software Engineers, AI Architects, and IT Migration Delivery Managers, tackling complex and impactful challenges.As an LLM-Powered Software Engineer, your mission will be to establish and iterate on robust LLM workflows, integrated within the client code lifecycle.Specifically, you will:- Identify the technical components to migrate (e.g., controllers, pages, services…)- Implement LLM workflows or micro-agents to automate or translate code blocks- Generate retro-documentation from existing code- Configure and integrate open-source or internal LLM tools (e.g., cline, GenAIScript)

Join the Theodo Group: A Legacy of InnovationSince 2009, Theodo has been at the forefront of assisting innovative companies in the design, development, and deployment of ingenious digital products, leveraging cutting-edge technology and a Lean approach.With exceptional growth over the past 15 years, Theodo has expanded to a team of over 700 passionate Theodoers, primarily composed of Software Engineers dedicated to technology and continuous improvement. As we scale, our organization has evolved into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industry (Fintech, Govtech, Heathtech, Consumer Products Goods). By 2025, Theodo is projected to generate €100M in revenue.With over 130 successful projects completed, Theodo Apps specializes in the development of cross-platform applications (mobile, web, and TV). We partner with our clients to design, develop, and deploy applications that transform user experiences.In just 10 years, Theodo Apps has grown from 2 to 120 employees and reached a revenue of €24 million in 2024!Theodo Apps collaborates with entrepreneurs, innovative SMEs, and large corporations such as TF1+, Carrefour, Urgo, and Compagnies des Alpes.Our technical team comprises 120 software engineers, tech leads, and architects, all graduates from top engineering schools, supported by 13 Engineering Managers dedicated to their success.Your Mission:- Lead & Develop Tech Leads: Mentor 1 to 4 Tech Leads in their professional growth and fulfillment.- Ensure Technical Delivery: Safeguard code quality (3S: Stability, Security, Speed), uphold project milestones, and ensure robust architecture.- Contribute to Business Development: Engage in strategic discussions with clients (CIOs, sponsors), help identify new opportunities, and participate in pre-sales with our sales team.