Firstup via Lever

Software Engineer, Fullstack (UK)

Level not stated United Kingdom

still open verified 1d ago posted 103d ago checked 2h ago

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This is the employer's own posting, not a copy on a job board.

What we know

Is it still open?

Confirmed still open

Last checked 1d ago — checked against the employer's own applicant tracking system, which is the company answering directly.

We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.

Check this listing's status as JSON

How old is it?

Posted 103d ago

The date the source published, not the day we noticed it (2026-06-03). Last seen at its source 2h ago.

Is it remote?

Remote - UK

That is the location the employer filed this posting under. Quoted as written — we do not re-word the source's own location.

Who may apply?

United Kingdom

The description states no restriction of its own. This is the source's own tag.

Pay not stated

Similar roles pay £75k–123.8k/yr

Middle 50% of 62 listings that do state pay — Engineering · all levels · United Kingdom · GBP/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.

Skills named in the ad

AWSDatadogDockerHRISIncident ManagementKubernetesMicroservicesNode.jsObservabilityReactRubySAPTypeScriptWorkday

Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.

Carried by 1 source

lever employer's own board first seen 26d ago · last seen 2h ago

The listing

Who We Are

At Firstup, our mission is to improve the employee experience at every moment that matters, large and small. As the communication pipeline for the world's workforce, we now serve 40 of the Fortune 100 companies, reaching and connecting more than 17 million employees daily.

Our employees are experts in the employee experience, workforce communications and technology.

Joining Firstup means joining a movement to make work better for every worker. As the world’s first intelligent communication platform, Firstup meaningfully engages employees at every moment from hire to retire, and delivers engagement insights to help companies support, promote and retain their talent. Our movement has taken root and is evident in our world-class customer base. Now we need your help. Ready to make a difference in the world?

Job Summary

The Sr. Software Engineer will join the team responsible for Firstup's public APIs, Agentic tools, third-party integrations with enterprise systems such as HRIS platforms, and shared platform services. You will deliver innovative, scalable solutions while constantly improving our approach to architecture, scale, availability, and fault-tolerance. You are an active user of Generative AI tools and coding agents, applying them daily to accelerate delivery and improve code quality.

Responsibilities

Contribute to the design, development, and maintenance of public-facing APIs used by enterprise customers.
Build and maintain integrations with external enterprise systems, including HRIS platforms such as Workday, SAP SuccessFactors, and Dayforce.
Support shared platform services used across the engineering organisation.
Write clean, well-tested, and well-documented code, and participate in code reviews.
Work within large-scale multi-tenant cloud services, developing your understanding of scalability and fault-tolerance.
Use Generative AI tools and coding agents in day-to-day workflows to improve code quality and delivery speed.
Collaborate with teammates and cross-functional partners to solve problems and deliver customer value.
Contribute to production health, including on-call rotations and incident response, in a "you build it, you run it" environment.
Identify and help resolve availability, reliability, and performance issues.

Minimum Qualifications

Bachelor's degree in Computer Science or related field, or equivalent experience.
3-5 years building reliable, performant applications and microservices.
Proficiency in TypeScript and Node.js. Ruby experience is a plus.
Experience across frontend (React.js), backend, and database layers.
AWS experience, including core compute, storage, and networking services.
Curiosity, a desire to learn, and openness to feedback.
A focus on customer experience in the work you deliver.

Preferred Qualifications:

Experience with HRIS integrations, such as Workday, SAP SuccessFactors, Dayforce, or similar platforms.
Experience with Kubernetes, Docker, and Helm.
Familiarity with Datadog or similar observability and monitoring platforms.
Demonstrated use of Generative AI tools or coding agents in development workflows.
Experience in enterprise SaaS organisations.
Open-source contributions or a history of side projects.

Why Firstup?

Because you care - about people, the work you do, and the connections you make. Work is such a large part of life; it only makes sense to make it awesome.

If you want to engage brilliant minds in a high-growth and inclusive environment where ideas are rewarded regardless of who they come from, join us. This is a rapidly changing space so if you thrive on ambiguity, are hungry for a challenge, and have the guts to speak your mind, you could be a perfect fit.

We offer an excellent PTO program, great health benefits, a casual and friendly environment, remote work, and a leadership team who truly believes in your growth – both personally and professionally.

Firstup is committed to providing equal employment opportunities to all applicants for employment and to all employees, without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, protected disability, veteran status, or any other protected status in accordance with applicable federal, state or local laws.

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