Senior Java/Kotlin Engineer (Core) (вакансія неактивна)

Our Mission and Vision

At Solidgate, our mission is clear: to empower outstanding entrepreneurs to build exceptional internet companies. We exist to fuel the builders — the ones shaping the digital economy — with the financial infrastructure they deserve. To achieve that, we’re on a bold path: to become the #1 payments orchestration platform in the world.

About the Role

We’re looking for a Kotlin Engineer to join our Core Team — the technical engine behind everything we build.

Every major product initiative runs through our core services. Reliability, scalability, and performance here directly impact the success of the entire platform.

Your mission: strengthen our engineering capability, help design next-generation payment architecture, and ensure the stability and fault tolerance of our payment infrastructure.

The team

Product Manager, Tech Lead, 5 Backend Engineers, 1 Frontend Engineer, 2 AQA Engineers, System Analyst

Why it may be your next big move

Impactful work. Build a mission-critical platform that directly affects the products you use every day.

Collaboration with experts. Work alongside engineers who built systems at Amazon, Revolut, Wix, and other world-class products.

Solve complex challenges. Design solutions for sophisticated payment processing logic while optimizing for reliability, observability, throughput, and scalability.

Operate at real scale.

• 18M+ payments processed monthly
• ~600 RPS in production
• 99.99%+ uptime

Autonomy & ownership. Own your work end-to-end — from design to deployment — and see the direct business impact of your decisions.

AI-assisted engineering: We invest in developer productivity by fully covering tools like GitHub Copilot, Windsurf/Cursor, and Coderabbit. You’ll write less boilerplate, ship faster, and focus on solving real problems — not fighting with repetitive code.

Explore our technology stack ➡️ here

What You’ll Drive

• Architecture & Implementation. Design and implement end-to-end solutions for 3DS payment processing, payment status synchronization, BIN services, secure payment data tokenization, and scalable event streaming.
• Extreme Ownership. Take responsibility for outcomes — not just tasks — ensuring quality, clarity, and effectiveness across the project lifecycle.
• Competence Growth & Contribution. Actively share knowledge, initiate improvements, and drive both product and process enhancements to completion.
• Partnership with Product & Stakeholders. Participate in planning, clarify requirements, explore trade-offs, and help shape solutions in a transparent, constructive way.
• High Standards & Engineering Discipline. Write clean, simple code. Maintain clear service contracts. Ensure backward compatibility. Manage safe, reliable migrations.
• Speed + Quality. Move fast without breaking things — balancing delivery velocity with robust engineering practices.

What We Pay Attention To:

Technical Mastery

You know your way under the hood:

• JVM Stack — 5+ years of professional experience with JVM technologies, including Spring Boot and Hibernate. No Kotlin experience? No problem — you’ll learn by solving real production challenges from day one.
• Kafka — hands-on work with Kafka and a solid understanding of key consumer metrics and operational considerations.

Mindset & Impact

You don’t just ship code — you own outcomes:

• Product mindset — You think end-to-end and build solutions that solve real user problems.
• Ownership & independence — You drive projects forward and take responsibility for decisions.
• Ability to learn quickly — You pick up new technologies and patterns without waiting for instructions.
• High standards & accountability — You deliver reliable systems and hold yourself to exceptional quality.

The Points That Make You Stand Out

• Experience with Kafka Streams, SQS, S3, Redshift
• Background in Fintech, especially in payments, billing, or financial processing
• Golang experience

Why Join Solidgate?

High-impact role. You’re not inheriting a perfect system — you’re building one.
Great product. We’ve built a fintech powerhouse that scales fast. Solidgate isn’t just an orchestration player — it’s the financial infrastructure for modern Internet businesses. From subscriptions to chargeback management, fraud prevention, and indirect tax — we’ve got it covered.
Massive growth opportunity. Solidgate is scaling rapidly — this role will be a career-defining move.
Top-tier tech team. Work alongside our driving force — a proven, results-driven engineering team that delivers.
Modern engineering culture. TBD, code reviews, solid testing practices, metrics, alerts, and fully automated CI/CD.

📩 Ready to become a part of the team? Then cast aside all doubts and click “apply”.

🫂 Know top talent? We’re always on the lookout. Refer someone for our role, and if they get hired, there’s a bonus waiting for you — simple as that.