Senior Software Development Engineer - Remote

Remote within Canada
One45 is one of Acuity Insights’ core products, used by medical schools across North America to manage some of the most operationally complex parts of health professions education.
From clinical placements and rotation scheduling to evaluations, curriculum management, learner records, and accreditation reporting, One45 sits at the center of workflows that institutions rely on every day.
The product supports tens of thousands of learners, educators, administrators, and clinical faculty members each year. It’s the kind of system that becomes deeply woven into how organizations operate, where reliability, context, and thoughtful decision-making matter as much as technical execution.
We’re hiring a Senior Software Developer to join the One45 team.
You’ll join a product with more than twenty years of production history: stable, widely adopted, and entering a significant period of evolution.
It’s also not a maintenance-only role.
The team is evolving APIs, improving data access and integrations, rethinking major workflows, and improving how software is developed with AI-assisted tooling throughout the lifecycle.
You’ll help maintain and improve a product that institutions already depend on while contributing to a modernization effort that’s beginning to move from planning into execution.
You’ll have the opportunity to help shape how the product evolves, how the team works, and what comes next.
There’s no clean separation between “maintenance” and “new work” on this team. In your first few months, you’ll likely spend most of your time learning how the system behaves in production by working on customer-facing enhancements, bug fixes, and workflow improvements. The kinds of requests that seem straightforward on the surface, but often require understanding years of product decisions, customer expectations, and interconnected workflows underneath. Giving administrators more control over how evaluations are delivered, managed, and communicated.
Refining permissions and access controls. Helping institutions manage increasingly complex roles, responsibilities, and workflows across their programs.
Over time, that balance shifts, and you’ll move into larger initiatives that help shape where One45 goes next.
Building out the next generation of APIs that make the platform easier to integrate with, extend, and evolve.
Improving access to data. Helping schools make better use of the information already inside One45 through improved reporting, integrations, and analytics capabilities.
AI-assisted software development. Contributing to how the team incorporates AI throughout the development lifecycle, from implementation and testing to review and documentation.
If you enjoy contributing ideas, challenging assumptions, and helping shape where work goes next, you’ll have opportunities to do that here.
That means a typical week might involve reviewing someone else’s code, investigating a production issue, refining requirements with Product, working on a customer-facing enhancement, and helping test a feature before it ships.
Everyone helps improve the system.
One45 has a dedicated Product Manager who participates in planning, backlog refinement, release discussions, and day-to-day decision-making. Understanding how decisions connect across the platform is often just as important as the implementation itself.
As the team grows, we’re investing in additional technical depth and leadership capacity so that ownership can be distributed more broadly, decisions can move more quickly, and more people can confidently drive important work forward.
The people who have the biggest impact aren’t necessarily the loudest or the most senior. They’re the ones who ask thoughtful questions, challenge assumptions, share context, and help move work forward.
If that sounds like the kind of environment where you do your best work, you’ll likely feel at home here.
One45 is built primarily with PHP, Symfony, MySQL, and React.
The platform has been evolving for more than twenty years, which means you’ll encounter multiple generations of engineering decisions, product decisions, and customer requirements layered together over time.
Others carry years of accumulated business logic because they’ve been solving important customer problems for a long time.
A lot of the work involves building context, understanding why decisions were made, and figuring out how to move the system forward without losing the things that already work well.
You don’t need deep PHP expertise on day one, but you do need to be interested in learning and working within the existing architecture.
AI is already a meaningful part of how the team works.
What matters most is the direction of travel and the momentum behind it.
Tools like Claude Code, Copilot, and Codex are already part of how work gets done across the team, from implementation and testing to documentation and code review.
If AI is already part of how you learn, explore ideas, write code, and improve your work, you’ll likely feel comfortable here. As Sarah puts it: “People make the mistake of doing everything the AI review flags. But that means the project will never be done. AI will always find something. You need the confidence to critically edit it down.”
As a Senior Developer on One45, you’ll help the team navigate a platform that’s already doing a lot while contributing to where it goes next.
That means writing code, reviewing code, investigating problems, participating in technical decisions, and helping move projects forward.
The team is also evolving how it uses AI throughout the development process. You’ll take ownership of some of the team’s most complex technical decisions, helping the team navigate ambiguity, balance trade-offs, and move important work forward with confidence.
helping the team think through how new work fits into an existing system with significant history and complexity
reviewing code and helping move work forward through thoughtful feedback
improving testing, reliability, and engineering practices over time
contributing to architectural decisions while remaining close to implementation
helping shape how modernization efforts and engineering practices evolve across the team
Beyond technical depth, we’re looking for someone who is comfortable operating with a high degree of ownership. You’ll often be the person helping clarify ambiguity, connecting work across teams, identifying risks early, and driving initiatives forward without needing detailed direction.
The strongest Senior Developers at Acuity don’t just solve technical problems. They help create momentum. They build alignment, surface trade-offs, and help others move faster through thoughtful collaboration and sound judgment.
Because the team is relatively small, you’ll have unusual visibility into both technical and product decisions, along with meaningful influence over how the platform, practices, and modernization efforts evolve.
You’re comfortable stepping into code you didn’t write, building context, and improving things without assuming they need to be rebuilt from scratch.
You’re comfortable balancing technical quality, business needs, and the realities of a system that’s already serving real users.
You care about how data moves through a system, how services interact, and what can go wrong once software reaches production.
You see testing and quality as part of the work itself, not something that happens at the end.
AI is already part of how you work.
You care about outcomes, not just implementation.
One45 supports critical workflows for medical schools and healthcare education programs. You’ll participate in shared support responsibilities, including occasional deployment activities, incident response, and coverage during key client periods throughout the year.
The starting salary for Senior roles is between $160,000 and $180,000 CAD. Final offers reflect experience, scope, market alignment, and internal equity.
A $3,000 annual learning budget to invest in your development, whether that’s deepening technical skills, building confidence, or exploring new areas of interest.
Access to employee stock options, so you share in the value you help create.
Remote-first work. Fully remote within Canada, with up to six weeks per year to work internationally.
Self-directed vacation (most teammates take 4–6 weeks annually), monthly Acuity Days (a collective Friday off), plus a two-week company-wide closure each December.
A 2% GRSP matching program to help you plan ahead.
~ A 16-week parental leave top-up beyond EI, available to all parents.

We don’t use AI to evaluate applications, though you may be automatically screened out if you don’t meet baseline requirements (e.g. In some interviews, AI may help with note-taking, but all evaluations and decisions are made by real humans.
We want to understand your career, abilities, and goals, and help you assess whether this opportunity and team are the right fit for you.
A conversation with the hiring manager focused on your experience, technical background, and the kinds of systems and challenges you’ve worked on. Technical Deep Dive & Pair Programming. This includes technical discussion and a pair programming exercise in an AI-enabled development environment designed to reflect the way our teams work day to day. If it’s a match, we move to offer, pending a digital reference check.
We’re a remote-first team of 135+ people who care deeply about our work and about each other.
As we’ve grown, we’ve made deliberate choices about how we work together, prioritizing trust, flexibility, and a sustainable pace so people can do meaningful work over the long term.
Acuity Insights has been named one of Canada’s Top Small & Medium Employers for the second consecutive year, reflecting our focus on building a strong, people-first environment.
Thoughtful, async-friendly communication across a distributed team
A culture grounded in care, curiosity, and shared purpose
As we continue to grow, we’re focused on maintaining that balance, building a company where people can do their best work and grow over time, without losing what makes the environment feel human.
Acuity Insights builds products that help higher education institutions make better decisions about people, from admissions through to development.
Our Casper situational judgment test (SJT), created by researchers at McMaster University, has been completed by over 1 million applicants and is one of the most widely used open-response SJTs in higher education, backed by nearly 20 years of research.
Today, we are evolving our products to better connect assessment, insight, and development, helping institutions not just identify potential, but actively support its growth over time. As part of that evolution, we’re increasingly building toward a more connected ecosystem across assessment, education, and learner development.