Senior Developer

Salary: $103,000 - 143,000 per year Requirements:

• 5+ years of experience building and shipping production full-stack web applications, ideally on a small, fast-moving team.
• Strong back-end skills in C#/.NET Core, or senior-level proficiency in a comparable modern, statically typed backend ecosystem and ability to transition to .NET.
• Strong React and TypeScript skills, with attention to user-facing quality and design systems.
• Experience with PostgreSQL and a working knowledge of ORMs, data modeling, and query performance.
• Hands-on experience deploying and operating applications on AWS, including infrastructure as code, build and deployment pipelines, Docker, and observability.
• Fluency with AI-assisted development tools and frameworks, including sound judgment about their appropriate use and examples of using them to improve delivery speed without compromising quality.
• Strong ownership and engineering judgment, including independent decision-making, anticipating edge cases, and a focus on correctness, testing, and maintainability.
• Excellent communication and collaboration skills, including explaining technical concepts to non-technical stakeholders; comfort working in an Agile environment.
• Solid understanding of software engineering principles, design patterns, and security best practices.
• Experience thriving in a small startup environment with ambiguity, rapid change, and limited resources.
• Preferred: Financial services, FinTech, or wealth-tech experience, including familiarity with regulated environments such as SOC 2.
• Preferred: Experience designing or operating agentic or AI-augmented systems, including tooling, evaluations, prompts, or guardrails.
• Preferred: Experience shipping AI-powered product features and familiarity with technologies such as BAML, MCP, agent or tool development, RAG, AI data privacy, model APIs, or AWS Bedrock.
• Preferred: Deeper expertise in AWS cloud architecture and security.

• Design, develop, test, and deliver features and services across our .NET Core/C# backend, React/TypeScript frontend, PostgreSQL data layer, and AWS infrastructure.
• Take problems from ambiguity through delivery, and own the reliability and maintainability of solutions in production.
• Use AI coding tools to improve speed and quality while remaining accountable for all work delivered; help develop agentic practices, tools, evaluations, and safeguards.
• Write clean, tested, and documented code, and strengthen our testing, CI/CD, and DevOps practices.
• Translate advisor and investor needs into technical solutions and proactively improve the product experience.
• Build knowledge of our investment, advisor, and trading domain and its regulatory context to make sound technical decisions.
• Partner with product, design, and leadership on requirements and architecture, and explain technical trade-offs clearly to non-technical colleagues.
• Support and mentor teammates through code reviews, pairing, and example.
• Help maintain the reliability, availability, and security of our applications in a regulated financial-services environment.

• AI
• AWS
• Backend
• C#
• CI/CD
• Cloud
• DevOps
• Docker
• Frontend
• Support
• MCP
• PostgreSQL
• RAG
• React
• Security
• TypeScript
• Web
• ASP.NET
• E2E
• Product Owner

More:

We are Seeds, a fast-growing, early-stage RIA fintech startup working to help financial advisors grow their businesses and provide clients with a meaningful investing experience. Our values include trust, transparency, listening, collaboration, thoughtful disruption, and excellence, with clients at the center of our work. As a remote-first company, we offer the flexibility to work from anywhere in the U.S., support work-life balance, and bring together a small team with experience across financial services, technology, and startups. This senior developer role is our anchor engineering level, with substantial ownership across our product and platform and a voice in technical direction. We treat AI as an important part of modern software development while expecting engineers to apply strong judgment and take responsibility for everything they ship. Compensation is based on experience and other job-related factors and may include incentives and equity. Benefits include medical, dental, and vision coverage, open PTO, company-paid holidays, and remote-work flexibility.

last updated 41 week of 2026