Senior Full Stack Developer-SF

Keoni; France; Hybrid; EUR 70,000 - 95,000; Full time

Job summary

Kéoni Consulting is seeking a Senior Full Stack Developer to join a 6-person team on a data APIs project. You will design, develop, deploy and maintain front-end and back-end features using TypeScript, NodeJS, ReactJS, and AWS services, in an agile environment.

You will participate in code reviews, create technical design studies, investigate issues, and help meet release criteria. The role requires strong collaboration with the client and architect, and a proactive, autonomous mindset.

Qualifications

• Senior level experience (7–10 years) in full stack development.
• Strong communication with client and architect.
• Proficient in TypeScript/NodeJS and ReactJS.
• Experience with REST APIs and OpenAPI specs.
• Familiar with CI/CD practices and agile ceremonies.

Responsibilities

• Design, develop, deploy, and maintain front-end functionalities and back-end services.
• Perform code reviews and write technical design studies.
• Investigate bugs and support release acceptance criteria.
• Participate in agile ceremonies and collaborate with the client and architect.

Skills

TypeScript & NodeJS

AWS

ReactJS

Git/GitLab/Jenkins/Terraform

REST APIs/OpenAPI

DDD/Hexagonal architecture

CI/CD

Testing (Robot Framework, Gatling)

Team collaboration

Bug investigation

Education

Diplomas

Tools

Lambda

DynamoDB

Aurora

PostgreSQL

API Gateway

Kubernetes

SQS

Job description

# Senior Full Stack Developer-SF* Home* Senior Full Stack Developer-SF* July 24, 2026* 0 Comments* By Roberte OkoyaMission context: To strengthen a 6-person development team on a project exposing Data APIs (Repositories and Management UI). Technologies: Java and ReactJS. Strong negotiation/communication skills with the client and the architect (client-side) are essential.Description: In an agile team environment (and with high-traffic applications), the Full Stack Developer designs, develops, deploys, and maintains front-end functionalities to meet the functional requirements expressed during the design of solutions or applications. The Full Stack Developer is capable of working on both the front-end and back-end of applications, as well as CI/CD. They are proficient in front-end and back-end development languages, the most widely used frameworks, and best practices for developing both.Deliverables: • TypeScript code development and testing: unit, integration, and end-to-end. • Code reviews. • Creation and writing of technical design studies. • Anomaly analysis and support for operational issues; ability to investigate the source of a bug. • Contribution to meeting release acceptance criteria. • Participation in agile ceremonies: daily stand-up meetings, task estimation, team retrospectives. Contribution to the quality, resilience, and security of the application.Skills: • TypeScript & NodeJS. • AWS: Lambda, DynamoDB, Aurora, PostgreSQL, API Gateway, Kubernetes, SQS. • NodeJS package, serial port transmission. • Git, GitLab, Jenkins, Terraform, ReactJS. • Robot Framework, Gatling. • Methodologies: REST APIs & OpenAPI specifications, DDD, hexagonal architecture, test mocks, BDD. • Autonomy. • Proactive. • Good teamwork skills. • Perseverance, able to investigate the source of a bug. • Responsible, mindful of the impact of developments. • Self-critical ability.Key Skills: Important: Writing skills, Interesting: Java, Adaptability, APIs, CI/CD, ReactJS, Automated testing. Level: Senior: 7-10 yearsApplication: CV + cover letter + copies of diplomas to be sent to [e-mail] in 2008, Kéoni Consulting is an IT consulting and engineering firm specializing in the banking, financial markets, insurance, and industrial sectors. We are the partner for major accounts in their digital transformation. We help them transform their business model, align their operational processes, select the best technologies, and mitigate and overcome the risks associated with digitalization. Kéoni Consulting helps companies to: Make a difference , innovate and create , reinvent their business, satisfy customers, gain a competitive advantage, become the leader in their sector, and become the leader in their sector. Our services cover the entire information systems lifecycle (Project Management, Business Analysis Consulting, Design, Implementation, Maintenance, Production, and Operations).**Job Category:** Digital Transformation**Job Type:** Full Time**Work location:** Europe