Senior Software Engineer

About Lillio (formerly HiMama) and Our Mission:
At Lillio (formerly HiMama), we are committed to serving the field as an authentic voice of the early childhood education (ECE) workforce, providing programs with all of the building blocks for high-quality early care and education and helping early educators focus on what matters most for children’s successful development and learning: relationships, play, creativity, and loving, nurturing caregiving. We are a social‑purpose business with the goal of empowering early childhood educators through innovative, affordable tools that enable them to improve child outcomes, engage family members, and support continued professional growth for their staff.

If you are excited about being part of an impact‑driven business, focused on making a difference in the early childhood education industry, Lillio is the place for you.

Lillio is a Series B, private‑equity backed business and we’re proud to be part of the Bain Double Impact portfolio. Lillio is recognized as an industry leader, most recently selected by Fortune in 2023 for their "Impact 20" list, which highlights organizations that have built their business models around world‑changing ideas to solve social and environmental problems.

We’re looking for…
A talented and motivated full stack engineer to join our dynamic engineering team. You care deeply not just about the security, performance, and maintainability of your code, but about our mission to elevate early childhood programs with innovative design and quality solutions. As a Senior Software Engineer you will play a lead role in designing, developing, and maintaining web applications using Ruby on Rails, React, and Graph

QL.

Lillio Engineering
At Lillio, our Product & Engineering teams are a tight‑knit unit. By using strong product creation methodologies and processes, and by working closely together, we imagine and create great products that immediately make an impact in the lives of millions of educators, parents, and young children. The engineering team at Lillio is made up of full stack web engineers as well as multi‑platform mobile experts.

Every individual on the engineering team has the opportunity to make a big impact on growing the Lillio product offering with a wide and varied feature set as well as impacting how Lillio builds and delivers that product. From feature enhancements to the core product, ground‑up engineering on brand‑new architecture, data scaling, and system performance, our team strives for excellence.

Engineering at Lillio requires being an adept problem solver that is hard working and motivated to get stuff done.

How You’ll Make an Impact:

Develop secure, performant, and well‑tested code for web applications using Ruby on Rails, Graph

QL and React.

Collaborate with product managers, designers, and other engineers to define project requirements and specifications.

Mentor and coach your peers, including compassionate code review.

Troubleshoot and debug issues as part of our shared on‑call rotation.

Lead technical decision making and contribute to establishing best practices for your team.

What You Bring to the Table:

Bachelor’s degree in Computer Science from an accredited University or relevant experience

Strong communicator who enjoys collaborating with teammates

Knowledgeable about best practices and emerging trends

Ambition to work hard in order to make an impact

Evidence of independence and self‑starter attitude

Propensity to always want to learn and improve

Strong sense of empathy not only for the user but others that you work with

Required Technical Skills

5+ years as a software engineer

Demonstrated technical or project leadership experience

Demonstrated expertise with relational databases

Proficiency with Ruby on Rails, Graph

QL, React

Experience with data monitoring and logging tools, ex Sentry, New Relic, Data Dog, etc

Nice to Have:

Experience with mobile app development

Knowledge of UX and UI best practices and trends

Experience with AWS, Postgres, Heroku

Comfort leveraging AI (such as):
Claude, Gemini, Co‑Pilot, MCP, etc.

Tech Stack:

AWS, Postgre

SQL, Heroku

Ruby on Rails, Graph

QL, React Native

Don’t have all the requirements but convinced…