Software Engineer

Company Overview

Our mission at Halo https://www.halo.science/ is to move science forward. A Fast Company "World Changing Idea" and one of Wellfound's Top 10 B2B Startups of 2025 https://wellfound.com/10-of-10-in-2025#1010-b2b, Halo’s platform connects scientists directly with companies to bring new innovations to the world. We work with the R&D teams at global, iconic companies – including Bayer, P&G and PepsiCo – on topics ranging from sustainability to human health. Since going live in January 2020, more than 16,000 scientists and science-led startups from 130+ countries have joined. We are venture-backed by Asymmetric Capital, Village Global, Lightbank, AngelList Ventures (invests in top .1% of startups https://techcrunch.com/2021/12/22/angellist-just-closed-a-25m-fund-to-back-startups-based-on-hiring-velocity/), Marketplace Capital, Lenny Rachitsky’s Air Angels (Airbnb angel group) and other top-tier investors.

• Learn about our new NSF-funded initiative https://new.nsf.gov/tip/updates/nsf-halo-pilot

• Read our reviews on Glassdoor https://www.glassdoor.com/Reviews/Halo-Reviews-E3539283.htm?filter.iso3Language=eng

• Watch "Why Work Here" episode with Halo CEO https://www.youtube.com/watch?v=HCnbyQOrEMI

Role Overview

Halo is looking for a Software Engineer to join our team and help grow the platform from early-stage product/market fit to massive scale. While the opportunity in front of us is large - the $2 trillion global R&D market - your work will also help accelerate scientific innovations that impact our world.

As a Software Engineer with a focus on Growth, you'll build new features, instrument those features and report on their impact, and improve our product development cycle.

Responsibilities

• You'll work alongside self-starters interested in solving real-world problems and streamlining the inefficiencies of external partnering for Fortune 500 companies.

• Take point on complex product initiatives, decompose them into smaller pieces, and run them to completion with minimal supervision

• Design flexible, maintainable code to execute against the vision and roadmap

• Safeguard code quality on your team, reviewing others' code with an eye to performance and maintainability

• Work closely with designers and product managers to distill complex business problems into elegant technical solutions.

• Collaborate with a close-knit engineering team that ships new code into production multiple times a week.

Who you are

Our tech stack is primarily Ruby on Rails and React. We also use Redis, Heroku, Postgres, and Typesense. While knowledge of our stack is a plus, it’s not a requirement.

• Bachelor's degree in Computer Science or related technical field, or equivalent experience

• 6+ years of experience (or can show equivalent depth) writing software in our tech stack and a strong engineering background

• A love of simple, well-tested code that is easy to extend and hard to break

• Strong product intuition and product-minded engineering judgment, with the ability to understand how technical decisions impact user experience

• Knowledge of best practices across the development lifecycle, including coding standards, code reviews, CI/CD, testing, operations, and the effective use of modern AI tools to significantly improve engineering productivity.

• Exceptional cross-functional communicator, capable of simplifying complex technical concepts for sales, GTM, design, and executive stakeholders.

• Understanding of performance tradeoffs, load balancing, and operational issues

• Proven ability to handle ambiguity and competing priorities, managing multiple projects simultaneously in a fast-paced environment.

Nice to Have:

• You have a science-related degree or industry experience in science or health.

• Hands‑on product‑management experience or strong product instincts

• Experience working for companies offering B2B marketplaces, applicant tracking systems, CRMs, or project management tools.

What we offer

• Share in the upside. Early employees have an outsized impact on a startup’s success. It’s only fair that you receive meaningful equity in return.

• Donate to research. Make a donation to scientific research you care about and we’ll match your donation dollar-for-dollar.

• Volunteer for research. Participate in a research study through ResearchMatch, a nonprofit funded by the NIH, and get a $200 bonus check.

• Stay healthy. We don’t ever want your health to be a source of stress and offer top-of-the-line medical, dental, and vision benefits.

• Escape for the Winter. From December to March, Halo will fly you anywhere in the country to escape the cold and get some Vitamin D.