---
title: 'Senior Software Engineer (Java / Kotlin) at Runa'
canonical: 'https://feeny.ai/job/senior-software-engineer-java-kotlin-runa-runa-london-p1c12cz1t0qm'
type: 'job'
last_seen: '2026-09-09'
---

# Senior Software Engineer (Java / Kotlin) at Runa

- **Company:** Runa
- **Location:** Runa London
- **Employment:** full-time
- **Posted:** 2026-07-27
- **Last confirmed live:** 2026-09-09
- **Apply:** https://jobs.ashbyhq.com/runa/703df287-0a6c-48b9-976f-9d90b8c50727

## Job description

Runa is pioneering a first-of-its-kind payment rail that enables the seamless, global money movement at scale. Legacy banking and payment infrastructure struggles to support the demands of today's low-volume, high-velocity payouts, leading to inefficiencies in global payouts. Businesses worldwide send over $20 trillion annually in rewards, remittances, and disbursements often incurring costs of up to 50% per transaction and subjecting recipients to lengthy delays.

Runa transforms this landscape by providing a new digital payments infrastructure that empowers businesses to send digital money instantly and cost-free to anyone, anywhere. The Runa API empowers thousands of businesses to make payments to 5 billion+ consumers in 190+ countries instantly to cards, wallets, bank accounts and gift cards. Leading companies such as Sodexo, TopCashback, Perkbox, Sweatcoin, Coinbase, and Globetopper rely on Runa to facilitate instant, flexible global payouts to tens of millions of consumers.

## The Role

As a Senior Software Engineer, you will be responsible for architecting, implementing and deploying software services from end to end. You'll produce clean, scalable, and reusable code to build products which will have a big impact on our customers.

You will have the opportunity to work with a modern, event-driven architecture running on containerised cloud infrastructure, whilst guiding and mentoring more junior engineers in the team.

Our Tech

This role will be building with Java and Kotlin, leaning heavily on event-driven architectures to move money reliably at scale. Services will run in containers on EKS, backed by both SQL and NoSQL databases on AWS.

If you're deep in the Java and Spring ecosystem (Spring Boot, Spring REST, Spring Data, resilience patterns like circuit breakers), you'll feel right at home. Experience with event-streaming and messaging tools like Kafka, EventBridge, SNS or SQS, Kubernetes tooling such as Helm, or infrastructure as code with Terraform will help you ramp up even faster.

What Excites You

- Contributing towards the design, delivery and deployment of large scale, complex projects which are used heavily by thousands of people with high throughput.
- Using modern technology like event-driven microservice architecture and container orchestration on AWS.
- Mentoring more junior members of the team to help support their growth and development and help scale the team by leading on technical interviews.
- Being a subject matter expert on technology and domain-specific problems, and taking ownership of software services from end to end.
- Improving responsiveness and overall performance of our web services.
- Getting stuck into problems at the heart of how money actually moves, in the payments space.

What Excites Us

- Proficiency in at least one of Java, or Kotlin, with a strong track record of architecting and developing new services and features end to end.
- Experience building applications with event-driven architectures.
- Familiarity with containerisation (e.g. EKS or similar).
- Knowledge of cloud platforms, ideally AWS.
- Working knowledge of both SQL and NoSQL databases.
- The ability to take ownership of design and architecture of large scale systems and developing API heavy software solutions without the need for guidance.
- A passion for promoting software engineering best practice, guiding and mentoring more junior engineers to deliver clean, scalable, and reusable code.
- Proactively contributing to the continual improvement of our engineering processes.

Bonus points for:

- Deep experience with Java and the Spring ecosystem (Java 17+, Spring Boot, Spring REST and Spring Data, resilience patterns such as circuit breakers).
- Experience with event-streaming and messaging technologies (e.g. Kafka, EventBridge, SNS, SQS).
- Familiarity with Kubernetes tooling such as Helm.
- Experience with infrastructure as code, ideally Terraform.
- Experience within the payments domain.

Even if you do not meet all of the above requirements but still think you would be a good fit for the role we would still encourage you to apply.

## What's in it for you

🏢 We have a hybrid structure with the requirement of 3 days a week at our London Office (Shoreditch)

📚£1,000 annual L&D allowance to invest in mastering your craft, including accredited studies. Plus 5 L&D days per year

🌴 25 days holiday + public holidays

🔋 Runa Reset Days - Runa closes on the first Friday of each quarter for a well-deserved, Reset Day

☀️ Summer Hours - In the month of August, we log off at 3pm on Fridays.

🗺️ Work from anywhere for up to 45 calendar days a year

🚀 Participation in the Employee Options pool giving you ownership in Runa

🚑 Private Medical + Dental Health Insurance with Bupa

👶 Enhanced parental leave for all new parents, up to 16 weeks full pay

💷 We are currently working towards salary transparency however we are not there just yet so our talent team will discuss this during the initial call to ensure that the right expectations are given.

The Interview Process

Call with Talent Lead ☎️

System Design Interview 🛠️

Coding Interview 💻

Values Interview 🌟

Want to learn more about life at Runa and our hiring process? Visit our Candidate Hub: https://runahq.notion.site/runa-candidate-hub

Diversity and Inclusion

We are committed to providing a hiring and working experience in which all people feel they are equally respected and valued regardless of race, religion, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

## About Runa

## Company Overview
- **One-liner**: Runa provides a global payout infrastructure platform that enables businesses to send digital value (gift cards, prepaid cards, push-to-card) instantly and at scale via a single API.
- **Entity Type**: Private (Series B)
- **Headquarters**: London, United Kingdom
- **Founded**: 2016
- **Founders**: Aron Alexander

## Core Business
- **Primary industry**: Financial Services / Payments Infrastructure
- **Target customers**: B2B, Enterprise, and SMBs needing to send payouts to gig workers, creators, customers, or employees (e.g., loyalty programs, rewards, incentives, commissions)
- **Mission statement**: "Unlock digital value for everyone" by building new infrastructure for the exchange of digital value with global scale, instant action, and unprecedented flexibility.

## Products & Services
- **Runa Payouts Platform (API)**: A unified API and network that lets businesses embed and automate instant payouts globally. Supports gift cards, prepaid cards, and push-to-card transfers across 30+ countries and 18 currencies.
- **Product Catalog**: Access to a network of 2,500+ payout types and merchant partners (e.g., Sodexo, Vodafone, Coinbase, Mint Mobile) via a single integration.
- **Balance Management**: Tools to manage funding flows and top-up mechanisms to ensure uninterrupted payouts.
- **FX & Multi-Currency Support**: Built-in foreign exchange capabilities for cross-border payouts.
- **Customization**: White-label options allowing businesses to brand the payout experience.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Annual Revenue of approximately **USD 41.1M** (as of latest data); **Total Funding** of approximately **USD 67.7M** across 11 rounds (latest: Series B in November 2022)
- **Notable Investors/Partners**: Element Ventures, AlbionVC, SAP, CommerzVentures, Clocktower Ventures, Fuel Ventures, Ascension
- **Growth Signals**:
    - Network reaches more than **1 billion people**
    - Operates in **30+ countries** and **18 currencies**
    - Hundreds of leading companies as clients, including Sodexo, TopCashback, Perkbox, Vodafone, Coinbase, and Globetopper
    - Revenue and customer base are reported as continuing to grow (though headcount saw a slight YoY decline of ~7.8% to 104 employees)

## Competitive Advantages
- **First-of-its-kind payment rail**: Purpose-built for low-volume, high-velocity transactions (e.g., gig worker payouts, rewards) that legacy systems struggle with.
- **Global reach & flexibility**: Single API provides access to 2,500+ payout options across 30+ countries, making it a one-stop shop for global payouts.
- **Enterprise-grade reliability**: Built for scale with a focus on security and uptime, trusted by major global brands.
- **No fees for senders/recipients**: Transactions are free for both the business sending and the end-user receiving the value.

## Strategic Focus
- **Product expansion**: Continuing to add payout types, currencies, and geographies to the network.
- **Developer experience**: Investing heavily in API documentation, developer tools, and self-service onboarding (evidenced by a dedicated developer hub).
- **Enterprise adoption**: Deepening relationships with large enterprises and platforms that need to embed payouts at scale.
- **Infrastructure reliability**: Maintaining a robust, compliant, and scalable platform to handle mission-critical payout flows.

## Why Work Here
- **Mission-driven work**: Opportunity to build the "new infrastructure for digital value exchange" and have a tangible impact on how businesses move money globally.
- **Culture & values**: Emphasis on trust, transparency, "adapt & overcome," "master your craft," and "dive deep" — with a focus on no politics and a flat, open environment.
- **Benefits**:
    - **Learning & Development**: Annual L&D budget plus study leave.
    - **Equity**: Employee stock options (ownership in the company).
    - **Time Off**: 25 days holiday plus bank holidays, and company-wide "Runa Reset Days."
    - **Financial**: Pension/401k with employer contributions, referral bonuses, employee discounts (up to 12% off Runa brands).
    - **Family**: Generous and flexible enhanced parental leave.
    - **Health**: Comprehensive health insurance, dental insurance, and cycle scheme.
    - **Social**: Quarterly in-person and remote socials.
- **Work policy**: Primarily office-based (on-site) but with a remote work program available. Headquarters in London, with offices in the US, Bulgaria, Germany, France, and the Netherlands.
- **Diversity & Inclusion**: Tech Talent Charter Signatory; committed to creating a workplace where everyone feels seen, heard, valued, and empowered.

## Sources
1. [runa.io - Careers Page](https://runaio.wpenginepowered.com/careers/)
2. [Built In - Runa Company Profile](https://builtin.com/company/runa-0)
3. [LinkedIn - Runa Company Page](https://www.linkedin.com/company/runapayouts)
4. [Tracxn - Runa Company Profile](https://tracxn.com/d/companies/runa/__oJNS_3VrRuosyZfGKojy42qNuIuD-bkuACQ93Ydey5g)
5. [Runa Developer Hub - Introduction](https://developer.runa.io/introduction)

## Other roles at Runa

- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-runa-runa-london-4rv4b2aeh3hp) — Runa London