Senior Full Stack Web Engineer (Modern Web + AI-Enabled SaaS)
ROI Solutions, Inc · Medford, MA (Can be Onsite, Hybrid, or Remote)
About the Role
We’re looking for a Full Stack Web Engineer ready to take the next step into a senior role who bring strong modern web skills, curiosity, and a growth mindset. In this role, you will contribute to core product features, collaborate on architectural decisions, and help implement a modern tooling ecosystem across a polyglot environment.
This is a hands‑on role ideal for engineers who are ready for more responsibility, eager to influence system design, and excited about delivering AI‑powered SaaS experiences.
Responsibilities
- Develop high-quality product features using React, TypeScript, and modern tooling.
- Collaborate with technical leadership on architectural patterns, system design, component structures, and organization.
- Implement AI‑enabled capabilities in partnership with internal teams—focusing on product integration, UX, and application logic.
- Contribute to a polyglot environment (Nx for example), ensuring maintainability and consistency across projects.
- Build both front‑end and back‑end components, including APIs and server-side logic.
- Participate in code reviews, design discussions, and engineering initiatives that improve development workflows, testing, and CI/CD.
- Stay current with emerging tools, libraries, and engineering methodologies—bringing thoughtful recommendations to the team.
- Partner closely with product, UX, and cross-functional stakeholders to deliver well‑designed, reliable features.
Required Qualifications
Core Technical Strengths
- React expertise with strong command of modern patterns (hooks, composition, performance optimization).
- Advanced TypeScript skills with an emphasis on reliability and maintainability.
- Familiarity with modern CI/CD pipelines (GitHub Actions, GitLab CI, etc.).
- Cloud provider experience (AWS), including deploying applications to cloud environments.
- Experience working in Monorepo (Nx, Turborepo, etc.) and familiarity with cross-project build optimization.
- Solid understanding of full stack development patterns, API integration, and modular application architecture.
AI Integration Knowledge (Practical Application)
You should be comfortable building product features powered by LLMs and AI services, with familiarity in areas such as:
- Using hosted LLM providers (AWS Bedrock, Azure OpenAI, etc.)
- Prompting techniques and integration patterns
- Awareness of RAG concepts, vector databases, and orchestration tools (deeper data engineering handled by internal platform teams)
- Building GenAI‑powered user interfaces, including conversational flows, AI‑assisted workflows, or UIs that dynamically respond to LLM‑generated output.
Modern Web Engineering Knowledge
- Strong grasp of component-driven architecture and separation of concerns.
- Experience working with modern tooling ecosystems, including frameworks similar to TanStack (Query, Router, Table) for data fetching, routing, and UI state.
- Understanding of accessibility, performance optimization, and testing strategies.
Preferred Qualifications (Nice-to-Have)
- Python familiarity for service development (fastapi, pydantic ai, langgraph, etc).
- Basic understanding of databases (relational and nosql)—deep modeling supported by our data platform team.
- Experience working with design systems or component libraries.
- Background in SaaS environments or multi-tenant application development.
Soft Skills & Team Approach
- Strong collaborator who enjoys working closely with technical leaders and cross-functional teams.
- Product-aware engineering mindset—balances technical quality with user and business impact.
- Clear communicator able to articulate technical ideas, tradeoffs, and options.
- Proactive, curious, and always improving your toolbox—especially around emerging AI development patterns.
What Success Looks Like
- You help deliver dependable, polished features that move the product forward.
- You collaborate effectively on system design and front-end architecture.
- You bring modern thinking, tools, and patterns to the engineering team in a practical, grounded way.
- You build scalable foundations that others can build on with confidence.
If you don't meet all the requirements mentioned above, don't worry. We strongly believe in creating a diverse and inclusive work environment. If you find this job opportunity interesting but don't meet all the qualifications listed in the job description, we encourage you to apply anyway. You might be the perfect candidate for this role or others like it.
PLEASE NOTE:
- This role is ONLY available for work in the following (23) locations: AL, AR, CO, FL, IL, KY, MA, MD, ME, MI, MN, NC, NH, NJ, PA, SC, TX, VA, VT, WA, WI, WV, and DC.
- This role will be working on Eastern Standard Time.
- This role is posted as remote, but could be hybrid or in-office if that fits your best working style.
