Senior Software Engineer Boulder, Colorado

Senior Software Engineer

in our Boulder, CO or El Paso, TX offices

Senior Software Engineer

As part of the Sum Up team working in one of our fabulous offices, you’ll play an important role in building and maintaining key services that power our in-store products, integrations and payments. We’re a diverse group working in multiple contexts, across multiple technology platforms, and in support of global teams. Our products and services power thousands of devices, millions of interactions, and billions of sent messages annually.

We own and support public-facing dashboards used by nearly all US Sum Up merchants, internal and partner-level APIs, and a rich set of internal back‑office tools.

• Maintain a high level of quality in our code bases through well‑written automated tests, good architecture and code review processes.
• Own, design, and code product initiatives from start to finish.
• Participate in collaborative problem solving, planning sessions, and retrospectives.
• Work collaboratively with designers, product managers, QA, and internal support teams to ensure our products are the best they can be.

• Strong team player - we work in small product teams that work very closely together and are constantly collaborating in order to move as fast as possible.
• Eagerness to take on new challenges with a positive attitude and a growth mindset

Business owners are at the heart of everything we do at Sum Up, which is why we create powerful, easy‑to‑use financial solutions to help them. With a founder’s mentality and a ‘team‑first’ attitude, our diverse teams across the globe work together to ensure small business owners we partner with can be successful doing what they love.

Sum Up is a global financial technology company that allows businesses of all sizes to manage their business and accept payments both in‑store and online. Named as Europe’s fastest‑growing company in the Inc. 5000, Sum Up supports over 4 million merchants globally and operates in 36 markets across Europe, the Americas, and Australia. With our point of sale systems, card terminals and online services relied upon by businesses of all sizes, Sum Up is the partner of choice for small businesses from every walk of life.

• Ownership & impact: you will be the technical and organizational lead for payments and loyalty in our largest market.
• Global reach: collaborate with engineering peers across Europe, LATAM and APAC while shaping products used by merchants in 37 countries.
• People‑first culture: competitive compensation and a commitment to work‑life balance.
• Cutting‑edge tech: work on EMV kernels, payment certifications and large‑scale micro‑services that process billions in transactions annually.

Base salary range is $155,000 - $175,000

Compensation will be finalized based on the candidate’s experience and location

• We’re a truly global team of 3000+ people from 60+ countries, working to help small businesses across 3 continents.
• Startup environment and small, cross‑functional teams
• A full suite of benefits including medical, dental and vision
• 401(K) employer match and paid parental leave
• One month of sabbatical after every 3 years of employment

Sum Up is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. Sum Up does not make hiring or employment decisions on the basis of race, color, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy.

Sum Up also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

Sum Up will not accept unsolicited resumes from any source other than directly from a candidate.

#SumUpUSA

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at Sum Up.