Fullstack Software Engineer - CDI Paris - Theodo Apps

Theodo: A Journey of Innovation and SuccessSince 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.Our unique approach is built on three core principles:- We have developed recognized expertise in key technologies for product design and development;- At every stage of the project, our primary focus is creating value for our clients;- We recruit top digital talent and nurture their ingenuity through our Lean approach.Theodo has experienced exceptional growth over the past 15 years: our teams comprise more than 700 Theodoers, primarily Software Engineers, who are passionate about technology and continuous improvement. As we have expanded, the group has structured itself into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.Your Team:You will join a tech community of over 120 Theodoers, including software engineers, tech leads, engineering managers, and architects, with whom you can exchange knowledge and grow daily.At Theodo, our tech teams work on project teams tailored to each client's needs. You will be part of a small team of Theodoers (4 to 5 people), consisting of Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with the client, regularly sharing progress, deepening your understanding of their challenges, and evolving the product to best meet the needs of its users.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop useful, high-performing, and sustainable digital products to address the challenges faced by our clients and their users.

Theodo: A Journey of Innovation and SuccessSince 2009, Theodo has been a driving force in supporting innovative businesses with the design, development, and deployment of cutting-edge digital products. We leverage the best of technology combined with Lean methodologies.With 15 years of exceptional growth, Theodo's team of over 700 dedicated professionals, primarily Software Engineers, are passionate about technology and continuous improvement. As we expand, we have structured our expertise into specialized entities focusing on different technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Goods). By 2025, Theodo is projected to achieve a revenue of €100M.At Theodo GovTech, we partner with our clients—government ministries, local authorities, and major public operators—to design, develop, and maintain accessible, sustainable, and socially beneficial digital products.Joining our adventure means sharing a common ambition: to harness digital solutions to enhance public action efficiency and improve the daily lives of both agents and users.Why Are We Hiring?We aim to showcase Theodo's expertise in the public sector by becoming the go-to partner for administrations to implement their public policies digitally and swiftly.We are in search of a Software Engineer at Theodo GovTech to ensure public actors' satisfaction by creating products that meet the needs for improving the quality of public service provided to citizens, associations, and businesses.Your Key Responsibilities:- Produce high-quality code that is defect-free, utilizing practices such as code reviews and pair programming, with a strong affinity for Agile development (particularly Scrum).- Address issues encountered and continuously improve your working methods (Daily, Problem solving, Retrospective).- Take ownership of quality at the ticket level, including writing automated tests.- Find smart and pragmatic solutions to simplify the product and lead the design of multiple user stories.Career Advancement Opportunities

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.

Discover Theodo and Our Success StorySince 2009, Theodo has been a pioneering force in helping innovative companies design, develop, and launch ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our unique approach is built on three key principles:- We have cultivated recognized expertise in essential product design and development technologies;- At every stage of a project, our priority is to create value for our clients;- We recruit the best digital talent and nurture their ingenuity through Lean methodologies.Theodo has experienced exceptional growth over the last 15 years: our teams consist of over 700 Theodoers, primarily Software Engineers passionate about technology and continuous improvement. With our growth, we have organized into specialized entities focusing on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo is expected to generate €100M in revenue.Your Team:You will join a vibrant tech community of over 120 Theodoers: software engineers, tech leads, engineering managers, and architects, with whom you can exchange ideas, learn, and progress on a daily basis.At Theodo, our tech teams work in project groups 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, engaging in regular discussions to share progress, deepen your understanding of their challenges, and adapt the product to meet user needs.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop valuable, high-performing, and sustainable digital products that address the challenges faced by our clients and their users.

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: Pioneers in Digital SolutionsSince 2009, Theodo has been at the forefront of innovation, helping businesses design, develop, and deploy ingenious digital products by leveraging the best technology and Lean methodologies.With exceptional growth over the past 15 years, Theodo now boasts a talented team of over 700 professionals, primarily composed of passionate Software Engineers dedicated to continuous improvement. Our growth has led to specialized entities within the group focusing on various technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Heathtech, Consumer Products). By 2025, Theodo aims to generate 100M€ in revenue.At Theodo FinTech, our mission is to enhance the usefulness of finance for individuals, businesses, and society. We partner with major corporations, ScaleUps, and StartUps within the financial services sector to design, develop, and maintain accessible, sustainable, and socially beneficial digital products.As experts in financial services technology, Theodo FinTech delivers exceptional digital products at lightning speed with zero bugs and high security. Our team excels at integrating APIs from all B2B fintech platforms to create innovative embedded finance solutions.Your Responsibilities:As a Senior Full-Stack Software Engineer at Theodo FinTech, your role will involve:- Rapidly coding without bugs, utilizing coding assistants (Copilot, Cursor, Windsurf).- Designing features by contributing product ideas and identifying optimal technical strategies, while adhering to our delivery practices.

Discover Theodo's Journey and SuccessSince 2009, Theodo has been empowering innovative companies by designing, developing, and deploying ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our unique methodology is built on three principles:- We have established recognized expertise in key product design and development technologies;- Regardless of the project phase, our priority in every decision is creating value for our clients;- We attract top digital talent and nurture their ingenuity through a Lean approach.Theodo has experienced exceptional growth over the last 15 years, with a team of over 700 dedicated professionals, primarily Software Engineers, passionate about technology and continuous improvement. As we grow, we have structured into specialized entities focused on technologies (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo aims to generate €100M in revenue.Your Team:You will join a community of over 120 Theodoers: software engineers, tech leads, engineering managers, and architects, with whom you will exchange ideas, learn, and grow on a daily basis.At Theodo, our tech teams work in project-based groups tailored to the specific needs of each client. You will be part of a small team (4 to 5 members) comprising Software Engineers, a Tech Lead, and a Product Manager. Together, you will collaborate closely with clients, regularly sharing progress, deepening understanding of their challenges, and evolving the product to meet user needs.Your Future Responsibilities:As a Fullstack Software Engineer at Theodo, your mission will be to design and develop useful, high-performance, and sustainable digital products to address the challenges faced by our clients and their users.

Join Theodo HealthTech as a Senior Software Engineer!At Theodo, we have been empowering innovative companies since 2009 to design, develop, and deploy ingenious digital products, leveraging the best of technology and a Lean approach.Our unique approach is grounded in three core principles:- We have developed recognized expertise in key product design and development technologies;- Our priority in every project stage is to create value for our clients;- We recruit top digital talents and cultivate their ingenuity through Lean methodologies.Theodo has experienced exceptional growth over the past 15 years, with a team of over 700 passionate Software Engineers dedicated to technology and continuous improvement. As we grow, we have structured into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, HealthTech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.At Theodo HealthTech, our specialized health entity, we assist all healthcare actors in developing tailored digital medical devices.With our experience in Lean and tech, combined with our healthcare knowledge, we design and develop digital medical devices that integrate into patient care pathways (digital therapies - DTx, virtual clinical trials, digitized care paths). Our goal is to create products that transform the lives of users, whether they are caregivers or patients.Your Responsibilities:As a Senior Software Engineer, your role will involve designing and developing web/mobile applications that are certified as medical devices.

Join Theodo's Thriving JourneySince its inception in 2009, Theodo has been dedicated to empowering innovative companies through the design, development, and deployment of ingenious digital products, leveraging cutting-edge technology and Lean methodologies.With remarkable growth over the past 15 years, our team has expanded to over 700 passionate Theodoers, primarily Software Engineers focused on technology and continuous improvement. Our structure has evolved into specialized entities based on technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, GovTech, HealthTech, Consumer Products). By 2025, Theodo is on track to generate €100M in revenue.At Theodo GovTech, we partner with clients including ministries, local authorities, and large public operators to design, develop, and maintain accessible, sustainable, and socially beneficial digital products.Joining our adventure means sharing a common ambition: leveraging digital technology to enhance the efficiency of public action and improve the daily lives of agents and users.Your Team:At Theodo, our tech teams work collaboratively in project-based groups tailored to each client's needs. You will be part of a small team (4 to 5 members) comprising Software Engineers, a Tech Lead, and a Product Manager. Together, you will work closely with the client, engaging in regular exchanges to share progress, deepen understanding of their challenges, and evolve the product in alignment with user needs.Your Future Missions:As a Fullstack Software Engineer at Theodo GovTech, your mission will be to design and develop digital products that are useful, high-performing, and sustainable to address the needs of our clients and their users.Throughout your projects, you will receive support to enhance your skills, learn to write quality code, understand product challenges, and contribute effectively to the development process.

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.

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

About the Role Theodo Cloud is hiring a Project Director for a permanent position based in Paris. This role centers on guiding teams as they build and deliver software solutions for clients. What You Will Do Oversee project lifecycles, from planning to delivery Ensure projects meet deadlines and quality standards Coordinate communication among team members and stakeholders Who We’re Looking For Experience leading teams in a technology setting Strong organizational and communication skills Comfort working in a fast-moving environment This is a full-time, permanent position located in Paris.

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.

Discover Theodo's Journey and SuccessSince 2009, Theodo has been a pioneer in supporting innovative businesses in the design, development, and deployment of cutting-edge digital products, leveraging the best technology and Lean methodologies.With 15 years of remarkable growth, Theodo has expanded to over 700 dedicated professionals, primarily Software Engineers passionate about technology and continuous improvement. Our group has structured itself into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, Healthtech, Consumer Goods). By 2025, Theodo is projected to generate €100M in revenue.Having successfully completed over 130 projects, Theodo Apps specializes in the development of cross-platform applications (mobile, web, and TV). We empower our clients in designing, developing, and deploying applications that enhance user experiences.In just a decade, Theodo Apps has grown from 2 to 120 employees and achieved a turnover of €24 million in 2024!We collaborate with a diverse range of clients including entrepreneurs, innovative SMEs, and large enterprises such as TF1+, Carrefour, Urgo, and Compagnies des Alpes.Your Team:Theodo Apps Design Team consists of 27 designers, making us the largest design studio in Paris. This enables us to work with both startups and major corporations such as Urgo, Compagnie des Alpes, Carrefour, BPI France, and Vitality, across all projects of Theodo Group (mobile, web, data, etc.).Since our inception in 2014, we have established a recognized expertise in product design, with 98% of our clients (large corporations, scale-ups, and startups) willing to recommend us since 2018.Your Future Responsibilities:As an Experienced Product Designer at Theodo Apps, you will play a pivotal role in strategically guiding our clients on their product vision and its implementation, closely collaborating with the Product Manager and the Tech Lead.

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.

Discover Theodo’s Journey and SuccessSince 2009, Theodo has been empowering innovative companies by designing, developing, and deploying ingenious digital products, leveraging cutting-edge technology and Lean methodologies.With remarkable growth over the past 15 years, Theodo has expanded its team to over 700 passionate Theodoers, primarily Software Engineers dedicated to technology and continuous improvement. As we grow, we have structured into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industries (Fintech, Govtech, Heathtech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.At Theodo FinTech, our mission is to make finance more beneficial for individuals, businesses, and society. As the FinTech expert within Theodo, we partner with clients — large enterprises, ScaleUps, and StartUps in the financial services sector — to design, develop, and maintain accessible, sustainable, and valuable digital products for society.As technology experts in financial services, Theodo FinTech delivers exceptional digital products in record time, ensuring zero bugs and high security. We excel at integrating APIs from all B2B FinTech platforms to create embedded finance solutions.Your Team:At Theodo, our tech teams operate in project groups tailored to each client’s needs. You will be part of a close-knit team of Theodoers (4 to 5 members), including Software Engineers, a Tech Lead, and a Product Manager. Together, you will work closely with the client, engaging in regular discussions to share progress, deepen understanding of their challenges, and evolve the product to meet user needs effectively.Your Future Responsibilities:As a Fullstack Software Engineer, you will be responsible for developing innovative solutions, collaborating with clients to refine specifications, and ensuring the delivery of high-quality software.

Join Theodo: Pioneers in Digital InnovationSince 2009, Theodo has been at the forefront of assisting innovative companies in crafting, developing, and launching ingenious digital products, leveraging cutting-edge technology and a Lean approach.Our unique strategy is rooted in three core principles:- We have cultivated recognized expertise in key product design and development technologies;- Our focus on value creation for clients guides every project decision, regardless of its stage;- We attract top digital talents and nurture their ingenuity through a Lean framework.Theodo has experienced exceptional growth over the past 15 years, amassing a team of over 700 passionate Theodoers, primarily Software Engineers dedicated to technology and continuous improvement. As we scale, we've organized into specialized units based on technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industry sectors (Fintech, Govtech, Healthtech, Consumer Products). By 2025, Theodo is projected to generate €100M in revenue.

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.