üîπ Position: Senior Full-Stack Engineer ‚Äì Payments & AI

üîπ Location: Remote

üîπ Contract: Freelance initially

üîπ Start: ASAP

üîπ Reporting to: CTO

üîπ Travel: Ability to occasionally come to Paris, during onboarding

Who are we?ShareGroop is a payment orchestration platform designed for enterprises.

Since 2015, we have helped travel, transportation and e-commerce companies design and operate complex payment journeys.

Our platform manages payment collection and orchestration, installments, wallets, payouts, virtual IBANs, subscriptions, payment recovery and other payment workflows.

We are looking for a Senior Full-Stack Engineer to own technical delivery and hands-on development, with the opportunity to grow into a hybrid Delivery / Technical Lead role based on results.

Your responsibilitiesEngineering & DeliveryYour first priority will be to become hands-on and operational on our platform and projects:

Develop and improve our platform using JavaScript / TypeScript, Node.js and Vue.js
Design and build APIs and backend services
Integrate PSPs, payment APIs and third-party services
Work on transactions, webhooks, refunds, payouts and reconciliation
Design robust asynchronous processes using queues, workers and idempotency
Contribute to architecture decisions
Implement automated tests and participate in code reviews
Support deployments, production monitoring and troubleshooting
Improve performance, reliability, security and maintainability
Work with AWS Cloud Platform and scalable cloud architectures

Enterprise & SMB DeliveryYou will work on two complementary types of projects:

Enterprise projects requiring specific integrations, technical workshops, complex workflows and close coordination with clients' IT teams
Standardized SMB solutions designed to be scalable, repeatable and easy to deploy across a larger number of merchants

You will progressively own projects from requirements to production: scoping, client workshops, architecture, technical specifications, planning, stakeholder coordination, delivery, testing, risk management, go-live and post-production.

For the SMB side, you may also contribute to standardizing onboarding, integrations, configuration and deployment processes, reducing manual operations and building reusable components and automation.

You should be equally comfortable writing production code, structuring a scalable standardized solution and leading a technical meeting with an enterprise client's IT team.

Payment & AI experienceHands-on Payment / FinTech experience is important: PSP integrations, payment APIs, transaction processing, webhooks, authentication/signature validation, idempotency, refunds, payouts, wallets/ledgers, reconciliation, acquiring or payment orchestration.

Experience with LLMs, AI agents, RAG, workflow automation or AI-assisted development is highly valued.

Growth towards Technical LeadThe initial focus is engineering and successful delivery. Based on your results, autonomy and ability to take ownership, you may progressively:

Take technical ownership of multiple projects
Challenge architecture and technical decisions
Coordinate engineering delivery
Support and mentor other developers
Lead code reviews and define engineering standards
Improve delivery processes, tools and automation
Contribute to architecture and the technical roadmap

We are not looking for a manager on day one, but for an excellent hands-on engineer who can demonstrate results and progressively take broader technical leadership responsibilities, reporting directly to our CTO.

What we're looking forüíª 5‚Äì7+ years of software engineering / full-stack experience

Strong experience with:

JavaScript / TypeScript
Node.js
Vue.js
REST APIs
SQL / PostgreSQL
Git
Automated testing & CI/CD
AWS Cloud Platform
Cloud architecture & distributed systems

You should be autonomous, structured and reliable, comfortable with enterprise clients and scalable SMB solutions.

Professional English required. French is a plus.

Contract & what we offerüí≤ Full-time freelance collaboration initially

üöÄ Complex enterprise payment projects + scalable SMB solutions

üíª Strong ownership of technical delivery

ü§ñ AI-driven engineering environment

üåç Remote-first international team

üë®‚Äçüíª Direct collaboration with our CTO

üìà Potential evolution towards Technical Lead

We may start with a first concrete project to validate the fit, with the objective of building a long-term collaboration.

How to apply?Please send your CV / LinkedIn profile together with:

Availability
Expected full-time monthly freelance rate
References from recent projects
A short description of a payment project you personally worked on, including your role and technologies
email to franck@sharegroop.com + richard@sharegroop.com

Start: ASAP

üá´üá∑ üîπ Poste : Senior Full-Stack Engineer ‚Äì Payments & AI

üîπ Localisation : Remote

üîπ Contrat : Freelance full-time dans un premier temps

üîπ D√©but : ASAP

üîπ Management : Directement rattach√©(e) au CTO

üîπ D√©placements : Possibilit√© de venir ponctuellement √† Paris, pendant l'onboarding

Qui sommes-nous ?ShareGroop est une plateforme d'orchestration de paiement d√©di√©e aux entreprises.

Depuis 2015, nous accompagnons des acteurs du voyage, du transport et du e-commerce sur leurs parcours de paiement.

Notre plateforme g√®re notamment l'encaissement et l'orchestration, les paiements en plusieurs fois, wallets, reversements, virtual IBAN, abonnements, recovery et autres flux de paiement.

Nous recherchons un Senior Full-Stack Engineer pour prendre en charge la delivery technique et le d√©veloppement, avec une √©volution possible vers un r√¥le hybride Delivery / Technical Lead selon les r√©sultats.

Vos missionsEngineering & DeliveryVotre premi√®re priorit√© sera d'√™tre directement op√©rationnel sur notre plateforme et nos projets :

D√©velopper notre plateforme en JavaScript / TypeScript, Node.js et Vue.js
Concevoir des APIs et services backend
Int√©grer des PSP, APIs et services de paiement
G√©rer transactions, webhooks, refunds, payouts et r√©conciliation
Concevoir des traitements asynchrones robustes : queues, workers, idempotence
Participer aux choix d'architecture
R√©aliser les tests automatis√©s et code reviews
Participer aux d√©ploiements, au monitoring et √† la r√©solution d'incidents
Am√©liorer performance, fiabilit√©, s√©curit√© et maintenabilit√©
Travailler sur AWS Cloud Platform et des architectures cloud scalables

Delivery Grands Comptes & SMBVous interviendrez sur deux types de projets compl√©mentaires :

Des projets Grands Comptes n√©cessitant int√©grations sp√©cifiques, ateliers techniques, parcours complexes et coordination √©troite avec les √©quipes IT clients
Une offre SMB standardis√©e, con√ßue pour √™tre scalable, r√©plicable et rapidement d√©ployable aupr√®s d'un grand nombre de marchands

Vous prendrez progressivement les projets du cadrage √† la production : besoins, ateliers clients, architecture, sp√©cifications, estimation, planification, coordination, delivery, tests, gestion des risques, go-live et suivi post-production.

Sur la partie SMB, vous contribuerez √©galement √† standardiser et automatiser l'onboarding, les int√©grations, la configuration et le d√©ploiement, afin de limiter les op√©rations manuelles et construire des composants r√©utilisables.

Vous devez √™tre aussi √† l'aise dans le code, dans la construction d'une solution standardis√©e scalable que dans une r√©union technique avec les √©quipes IT d'un grand compte.

Exp√©rience Payment & AIUne exp√©rience concr√®te Payment / FinTech est importante : int√©gration de PSP, APIs de paiement, transactions, webhooks, authentification/signatures, idempotence, refunds, payouts, wallets/ledgers, r√©conciliation, acquiring ou orchestration de paiement.

Une exp√©rience avec les LLM, AI agents, RAG, automatisation de workflows ou d√©veloppement assist√© par IA est fortement appr√©ci√©e.

√âvolution vers Technical LeadLa priorit√© initiale reste la delivery et le d√©veloppement. Selon vos r√©sultats, vous pourrez progressivement :

Prendre la responsabilit√© technique de plusieurs projets
Challenger les architectures et choix techniques
Coordonner la delivery
Accompagner d'autres d√©veloppeurs
Piloter les code reviews et standards de d√©veloppement
Am√©liorer nos m√©thodes, outils et automatisations
Participer davantage √† l'architecture et √† la roadmap technique

Nous ne recherchons pas un manager d√®s le premier jour, mais un excellent profil hands-on capable de d√©montrer ses r√©sultats puis de prendre progressivement davantage de responsabilit√©s, sous le management du CTO.

Profil recherch√©üíª 5‚Äì7+ ans d'exp√©rience en d√©veloppement logiciel / full-stack

Solide exp√©rience :

JavaScript / TypeScript
Node.js
Vue.js
REST APIs
SQL / PostgreSQL
Git
Tests automatis√©s & CI/CD
AWS Cloud Platform
Architectures cloud & syst√®mes distribu√©s

Vous √™tes autonome, structur√©(e), fiable, √† l'aise avec les grands comptes et les solutions SMB scalables.

Anglais professionnel indispensable. Fran√ßais appr√©ci√©.

Contrat & ce que nous proposonsüí≤ Freelance full-time dans un premier temps

üöÄ Projets de paiement Grands Comptes complexes + offre SMB scalable

üíª Forte responsabilit√© sur la delivery

ü§ñ Environnement int√©grant progressivement l'IA

üåç Organisation remote et internationale

üë®‚Äçüíª Collaboration directe avec notre CTO

üìà √âvolution possible vers Technical Lead

Nous pouvons commencer par un premier projet pour valider le fit, avec l'objectif de construire une collaboration long terme.

Comment postuler ?Envoyez-nous votre CV / profil LinkedIn avec :

Votre disponibilit√©
Votre tarif mensuel full-time
Des r√©f√©rences de projets r√©cents
Un exemple de projet de paiement sur lequel vous √™tes personnellement intervenu(e), avec votre r√¥le et les technologies utilis√©es
email : franck@sharegroop.com + richard@sharegroop.com

D√©but : ASAP

üîπ Position: Senior Full-Stack Engineer ‚Äì Payments & AI

üîπ Location: Remote

üîπ Contract: Freelance initially

üîπ Start: ASAP

üîπ Reporting to: CTO

üîπ Travel: Ability to occasionally come to Paris, during onboarding

Who are we?ShareGroop is a payment orchestration platform designed for enterprises.

Since 2015, we have helped travel, transportation and e-commerce companies design and operate complex payment journeys.

Our platform manages payment collection and orchestration, installments, wallets, payouts, virtual IBANs, subscriptions, payment recovery and other payment workflows.

We are looking for a Senior Full-Stack Engineer to own technical delivery and hands-on development, with the opportunity to grow into a hybrid Delivery / Technical Lead role based on results.

Your responsibilitiesEngineering & DeliveryYour first priority will be to become hands-on and operational on our platform and projects:

Develop and improve our platform using JavaScript / TypeScript, Node.js and Vue.js
Design and build APIs and backend services
Integrate PSPs, payment APIs and third-party services
Work on transactions, webhooks, refunds, payouts and reconciliation
Design robust asynchronous processes using queues, workers and idempotency
Contribute to architecture decisions
Implement automated tests and participate in code reviews
Support deployments, production monitoring and troubleshooting
Improve performance, reliability, security and maintainability
Work with AWS Cloud Platform and scalable cloud architectures

Enterprise & SMB DeliveryYou will work on two complementary types of projects:

Enterprise projects requiring specific integrations, technical workshops, complex workflows and close coordination with clients' IT teams
Standardized SMB solutions designed to be scalable, repeatable and easy to deploy across a larger number of merchants

You should be equally comfortable writing production code, structuring a scalable standardized solution and leading a technical meeting with an enterprise client's IT team.

Experience with LLMs, AI agents, RAG, workflow automation or AI-assisted development is highly valued.

Growth towards Technical LeadThe initial focus is engineering and successful delivery. Based on your results, autonomy and ability to take ownership, you may progressively:

Take technical ownership of multiple projects
Challenge architecture and technical decisions
Coordinate engineering delivery
Support and mentor other developers
Lead code reviews and define engineering standards
Improve delivery processes, tools and automation
Contribute to architecture and the technical roadmap

What we're looking forüíª 5‚Äì7+ years of software engineering / full-stack experience

Strong experience with:

JavaScript / TypeScript
Node.js
Vue.js
REST APIs
SQL / PostgreSQL
Git
Automated testing & CI/CD
AWS Cloud Platform
Cloud architecture & distributed systems

You should be autonomous, structured and reliable, comfortable with enterprise clients and scalable SMB solutions.

Professional English required. French is a plus.

Contract & what we offerüí≤ Full-time freelance collaboration initially

üöÄ Complex enterprise payment projects + scalable SMB solutions

üíª Strong ownership of technical delivery

ü§ñ AI-driven engineering environment

üåç Remote-first international team

üë®‚Äçüíª Direct collaboration with our CTO

üìà Potential evolution towards Technical Lead

We may start with a first concrete project to validate the fit, with the objective of building a long-term collaboration.

How to apply?Please send your CV / LinkedIn profile together with:

Availability
Expected full-time monthly freelance rate
References from recent projects
A short description of a payment project you personally worked on, including your role and technologies
email to franck@sharegroop.com + richard@sharegroop.com

Start: ASAP

üá´üá∑ üîπ Poste : Senior Full-Stack Engineer ‚Äì Payments & AI

üîπ Localisation : Remote

üîπ Contrat : Freelance full-time dans un premier temps

Depuis 2015, nous accompagnons des acteurs du voyage, du transport et du e-commerce sur leurs parcours de paiement.

Notre plateforme g√®re notamment l'encaissement et l'orchestration, les paiements en plusieurs fois, wallets, reversements, virtual IBAN, abonnements, recovery et autres flux de paiement.

Vos missionsEngineering & DeliveryVotre premi√®re priorit√© sera d'√™tre directement op√©rationnel sur notre plateforme et nos projets :

Concevoir des APIs et services backend
Concevoir des traitements asynchrones robustes : queues, workers, idempotence
Participer aux choix d'architecture
Travailler sur AWS Cloud Platform et des architectures cloud scalables

Des projets Grands Comptes n√©cessitant int√©grations sp√©cifiques, ateliers techniques, parcours complexes et coordination √©troite avec les √©quipes IT clients
Une offre SMB standardis√©e, con√ßue pour √™tre scalable, r√©plicable et rapidement d√©ployable aupr√®s d'un grand nombre de marchands

Vous devez √™tre aussi √† l'aise dans le code, dans la construction d'une solution standardis√©e scalable que dans une r√©union technique avec les √©quipes IT d'un grand compte.

Une exp√©rience avec les LLM, AI agents, RAG, automatisation de workflows ou d√©veloppement assist√© par IA est fortement appr√©ci√©e.

√âvolution vers Technical LeadLa priorit√© initiale reste la delivery et le d√©veloppement. Selon vos r√©sultats, vous pourrez progressivement :

Challenger les architectures et choix techniques
Coordonner la delivery
Participer davantage √† l'architecture et √† la roadmap technique

JavaScript / TypeScript
Node.js
Vue.js
REST APIs
SQL / PostgreSQL
Git
AWS Cloud Platform

Contrat & ce que nous proposonsüí≤ Freelance full-time dans un premier temps

üöÄ Projets de paiement Grands Comptes complexes + offre SMB scalable

üåç Organisation remote et internationale

üë®‚Äçüíª Collaboration directe avec notre CTO

üìà √âvolution possible vers Technical Lead

Nous pouvons commencer par un premier projet pour valider le fit, avec l'objectif de construire une collaboration long terme.

Comment postuler ?Envoyez-nous votre CV / profil LinkedIn avec :

Votre tarif mensuel full-time
Un exemple de projet de paiement sur lequel vous √™tes personnellement intervenu(e), avec votre r√¥le et les technologies utilis√©es
email : franck@sharegroop.com + richard@sharegroop.com

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