Senior Application Developer

Senior Fullstack Application Developer

Our Vision

P\S\L Group is a global organisation dedicated to putting information at the service of medicine. The companies and people of the P\S\L Group aim to improve medical care by serving those who need it, those who provide it, and those who seek to improve it.

To this end, we want our information and education services to contribute to the goals we share with our clinicians, clients and supporters, namely: to accelerate the advancement of medicine and help people enjoy better, longer lives.

Purpose

Our key contribution to society is to help clinicians and those who support them provide state-of-the-art medical care.

Our primary business purpose is to help clients and supporters increase the effectiveness of activities pertaining to scientific communication, medical education and the maintenance of clinician audience intimacy.

Position Summary

We are looking for aSenior Fullstack Application Developer to define, design and deliver scalable, sustainable and secure web applications at the core of the organization. You will own features end to end: modernReact frontends, robustPHP (Symfony) andNode.js / TypeScript backends, and cloud-native infrastructure onAWS, from containerized services onKubernetes (EKS) toserverless workloads onLambda.

A growing part of the role is building withGenerative AI: integrating frontier models such asOpenAI GPT,Anthropic Claude,Google Gemini (via Vertex AI),Amazon Bedrock models and open-weight models such asDeepSeek, and usingClaude Code and agentic tooling to plan, build, review and test software. Ideal candidates are proactive engineers who are comfortable making architecture decisions across the stack, modernizing legacy systems, and collaborating closely with product, QA and business teams in a fast-paced, highly communicative, innovation-driven environment.

What You Will Do

• Build modern, responsive web interfaces usingReact,Next.js,TypeScript,JavaScript andVite.
• Translate complex UI/UX designs into clean, accessible, responsive code.
• Design and develop scalable and secure backend APIs usingPHP (Symfony) andNode.js / TypeScript.
• Architect, deploy and maintain containerized services onAWS EKS andserverless applications usingLambda, API Gateway, SQS/SNS, EventBridge, Step Functions andDynamoDB.
• Integrate third-party services andGenAI APIs (streaming responses, RAG, agents, MCP) for intelligent application behavior.
• Work with the PM to provide estimates for technical activities; analyze requirements and document architectural recommendations, systems and code-level design.
• Write unit, integration and functional tests;automate regression and integration tests using AI; maintain high code coverage and code quality.
• Perform code reviews for standards, quality assurance and security (static analysis, container scanning, AI-assisted PR review).
• Implement website optimizations: front-end performance, CDN usage, caching strategies and efficient media handling.
• Modernize legacy components (framework upgrades, migrating server-rendered views to React, moving pipelines to GitHub Actions).
• Address day-to-day and longer-term technical issues and participate in R&D to evaluate new technologies, solutions and software.
• Mentor junior team members and contribute your skills wherever required.

Key Skills, Knowledge & Professional Experience

• Over5 years of experience in web development, with proven delivery of highly performant, scalable stacks – frontend and backend.
• Experience planning, debugging and writing code withClaude Code (skills, plugins, sub-agents, MCP) and other agentic coding tools.
• Skills to design software end to end (DB structure, components, API, integrations).
• Strong understanding of distributed systems,event-driven architecture and API design (REST, OpenAPI).
• Solid experience withPHP / Symfony andNode.js / TypeScript.
• Strong experience withReact and modernJavaScript / TypeScript.
• Hands-on experience withAWS (containers and serverless).
• Experience withLLMs (agents, embeddings, MCP, RAG, APIs of frontier LLMs).
• Development best practices, including unit testing, code reviews and design patterns.
• Experience mentoring junior team members; good communication skills.
• Mindset of an engineer (attention to application performance, security, debugging skills).

Technical Skills

• Languages & Frameworks – Frontend:
• • JavaScript, TypeScript, React, Next.js, React Native, Vite, HTML5, CSS3 (SASS/SCSS)
  • Redux Toolkit, TanStack Query, React Router, Material UI (MUI)

• Languages & Frameworks – Backend:
• • PHP, Symfony, API Platform, Doctrine ORM, OpenAPI
  • Node.js, TypeScript, Express, AWS SDK

• Cloud & DevOps:
• • AWS: EKS, Lambda, API Gateway, Cognito, S3, CloudFront, SQS, SNS, EventBridge, Step Functions, DynamoDB, RDS, CloudWatch
  • Infrastructure as Code: AWS SAM / CloudFormation, Serverless Framework, AWS CDK
  • Containers: Docker, Kubernetes
  • CI/CD & quality: GitHub Actions, SonarQube, New Relic

• Databases:
• • MySQL, PostgreSQL, DynamoDB, Redis, OpenSearch

• Testing:
• • PHPUnit, Jest, Vitest, Testing Library, Playwright

• Tooling:
• • Git, GitHub, NPM / Yarn, Composer, Webpack, ESLint, Prettier
  • AI-assisted development: Claude Code, MCP, agents, agentic coding CLI tools, AI PR review

• GenAI Ecosystem:
• • OpenAI GPT, Anthropic Claude, Google Gemini (Vertex AI), Amazon Bedrock, open-weight models (DeepSeek, Llama)
  • Embeddings, RAG, vector stores, prompt engineering, tool use / function calling, streaming

Nice to Have

• Experience withPython (scripting, data processing, ML/AI services).
• Experience deploying onVercel or similar hosting platforms.
• Knowledge ofTerraform and multi-account AWS setups.
• Familiarity withmonorepos and modular architectures.
• Exposure toFigma or other design tools.
• Data engineering and analytics experience (Snowflake, SQL Server, ETL).
• Feature flags and observability (LaunchDarkly, New Relic, Microsoft Clarity, Matomo).
• Domain knowledge in healthcare, life sciences or medical education.
• Other cloud platforms such as Google Cloud or Azure.

Perks & Benefits of Joining Our Team at P\S\L Mexico
⚕️  Private Health Insurance
🌍  International Exposure
🤸  Agile Organization
💸  13th-Month Salary (Aguinaldo)
💰  Savings Fund
🍽️  Food Vouchers
💻  Flexible Home Office – Come to the Office at Your Best Convenience
🏖️  12 Vacation Days After Your 3-Month Anniversary
📚  Tuition Reimbursment