Senior Software Engineer

Join in on pioneering procurement AI agents

Since 2019, Pactum has been at the forefront of transforming enterprise procurement with groundbreaking Agentic AI. We are not just automating a process; we are leading the industry in redefining how companies negotiate and manage supplier relationships. Our AI agents work around the clock, collaborating seamlessly with humans to discover negotiation opportunities and close supplier deals at scale. Trusted by over 50 of the world's largest enterprises, including Walmart and Rolls Royce, we deliver tangible value, drive agility, and unlock hidden potential.

Ready to make an impact? Join our passionate, global team and be part of a bold mission: to bring trust, transparency, and automation to every supplier negotiation.

As the first in our field, we address novel challenges with novel solutions. Our platform enables large enterprises to manage and monitor negotiations at scale, effectively saving money, boosting efficiency, and strengthening crucial supplier relationships. We're built on a foundation of deep decision-making capabilities and cutting-edge innovation, which has allowed us to raise over $100 million in funding, including a Series C of $54 million in June 2025 led by Insight Partners. Our technology is proven—with notable achievements like a negotiation and signing carried out entirely by AI agents in just 87 seconds.

About you

Pactum is pioneering a new kind of AI-based negotiation software, solving novel, multi-million dollar problems for the world's largest enterprises. As a Software Engineer, you'll be building foundational, large-scale systems to design, manage, and monitor these complex AI agents.

We are looking for independent, creative problem-solvers ready for end-to-end ownership. Your contributions at this early stage will have a huge impact on the product for years to come. Join our growing team in Tallinn, Estonia and make an impact

Your daily adventures will include

• Engineering excellence. Write clean, maintainable code and engage in high-quality practices. We maintain over 80% test coverage, rely on daily pull requests for better communication, and use CI/CD to deploy fast and frequently.
• Modern stack. Work with our core stack, which includes Typescript/NodeJS, Kotlin, Postgres, Google Cloud Platform, and React.
• Deep ownership. Go beyond writing code- take full charge of problems, architect solutions, and guide your own work from concept to deployment to produce scalable and maintanable solutions.
• Uncharted territory. Solve problems that literally no one has solved before. We operate in a "Blue Ocean" space, ensuring you are always challenged and never bored.
• Collaborative growth. Join a close and supportive team dedicated to continuous knowledge sharing and helping you accelerate your professional development.
• Read more about Pactum Engineering Team here.

What you bring

• Solid experience with object-oriented languages and their real-world application.
• You actively communicate and collaborate with your team, engaging in brainstorming sessions and providing constructive feedback.
• You get excited when you see concepts like Agile, Lean, TDD, SOLID, DDD, and CI/CD- demonstrating a commitment to modern engineering practices.
• You are customer-focused with a sharp eye for quantifying the impact of your work on the business.
• You enjoy taking charge of complex problems and have experience leading development initiatives or driving technical projects to completion.
• You are fluent in English and are comfortable with occasional non-traditional work hours; we are a startup with a global footprint and employees in over eight different countries.
  

This is the place for you if...

• You believe the best work happens when passion meets purpose and you're driven to push boundaries. Pactum is an environment where you can truly shape an industry by building agents used by top global companies.
• You want to help define the creative and narrative identity of a category-shaping AI platform trusted by industry leaders.
• You thrive in a mission-driven, curious, and collaborative environment, actively shaping the future of enterprise negotiation.
• You are passionate about being part of an elite team that builds real-world agents used by some of the world's largest companies.
• You have relentless hunger and ambition to push boundaries, never settling for the status quo, and always striving to reach the next level.
• You are motivated by the challenge to innovate continuously and see your work make a tangible, industry-changing impact.
• You believe in giving AI purpose and are driven to move the industry forward.

Our commitment to you

Unlimited vacation time. You decide how much and when.

Paid sick leave. Take the time you need, worry-free.

Company equity. Share in our success.

Competitive salaries. We benchmark industry figures so you don't have to.

Learning & development. We support your growth through seminars, workshops, and resources.

Flexible schedule. Work whenever and wherever suits you.

Annual off-site retreats. Get inspired in real life.

Team bonding. Enjoy happy hours, activities, and cross-functional chats with fellow Pactonians.

Medical, dental, and vision coverage. Including US programs and EU/UK government plans.

Office setup stipend. For remote employees to do their best work.

Co-working allowance. Find inspiration with a change of scenery, as needed.

Generous national holidays. Including U.S. programs and EU/UK local holidays.

Paid parental leave. Supported by US and EU/UK programs.

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