Senior Software Engineer

Our Company

Arch is a Series B financial technology company that automates the management of private investments, improving access, understanding, and the human experience of investing across asset classes.


Private investments such as venture capital, hedge funds, and private equity, make up roughly 25% of the investment universe. Traditionally, investors, advisors, banks, families, and managers track hundreds of investments in complicated spreadsheets, file folders, and busy inboxes. Not only is this tedious and time-consuming, but it is rife with opportunity for manual data entry errors, inconsistent reporting, and lost information. Enter, Arch.

Arch delivers standardized data, documents, and insights in a single platform, avoiding the need to chase information across dozens or hundreds of 'portals'. Our purpose is to save investors' time while empowering them to make more informed investment decisions, leading to better financial outcomes.


We are a fast-growing, dynamic team of 200+, serving over 400 clients, including several of America's largest banks, families, and financial institutions. We've over doubled the size of the company every year since inception and we are looking to hire in all departments as we scale.
The Role:

As a Senior Software Engineer , you'll design, build, and maintain core components of our platform. This is a critical role - your contributions will directly impact the user experience and help our team scale to meet growing demand for our product. You'll work closely with product managers, designers, and other engineers to build solutions that make a difference in our clients' investment processes.

Your responsibilities will include:

• Design, build, and maintain scalable software systems that streamline the private investment experience.
• Collaborate with product, design, and data teams to deliver user-facing features end to end.
• Drive architectural decisions and lead key engineering projects from ideation to launch.
• Write clean, maintainable code with a focus on performance, security, and scalability.
• Mentor teammates and help shape engineering culture as the team continues to grow.

Reach out to us if you have:

• 5+ years of experience building web-based software products.
• Strong computer science fundamentals and experience designing scalable systems.
• Full-stack development experience, or deep expertise in either frontend or backend.
• A track record of driving projects independently in a fast-moving environment.
• Excellent communication and collaboration skills across technical and non-technical teams.

Bonus points if you have:

• Experience in the fintech space or working on investment platforms.
• Prior experience at a fast-growing startup or on a founding engineering team.
• Exposure to building internal tools or infrastructure to improve engineering efficiency.

A Note about us:

Most of our full-time roles are based onsite at our New York City office , where our team thrives on in-person collaboration and dynamic teamwork. Being onsite daily enables us to build strong connections, move quickly, and deliver exceptional service to our clients.

For select roles, we are also open to candidates based in Boston . If a role is open to Boston, it will be listed explicitly in the job location.

We encourage applicants who are located in or open to relocating to the listed location to apply and join us in this hands-on, collaborative environment
Some perks of working for Arch include:

• Strong Team - You'll be backed by a strong team that consistently exceeds client expectations and ships new products quickly.
• Your work is high impact - Being part of a small team means you have real responsibility and impact from day one. You'll be involved in discussions that drive the growth and direction of our platform from the very beginning.
• Product Market Fit - We have strong product market fit, exceptionally low churn, and have grown mostly organically through word of mouth.
• Team community and camaraderie - We have enormous trust in each other and always do what we can do to support one another. We're always ready to step in to help.
• Great office: Our new home at 199 Water Street gives us a beautiful, energizing space to come together as a team, collaborate more easily, and keep building the next chapter of Arch.
• Lunch is on Us - We'll keep the team fueled with lunch in the office, whether you're catching up with teammates, talking through an idea, or just taking a well-earned break.