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Senior Backend Developer
About On The Spot
On The Spot Development is a software development company that builds R&D teams for heavily invested startups and tech companies from the UK, EU, and Israel.
This job opportunity is for a position within one of our teams. You will be directly employed by On The Spot and will collaborate closely with our partner companies, contributing to their product's journey.
About the team
Dexcelerate is a decentralized crypto trading platform offering real-time data, advanced automation, and non-custodial security. Since launching in August 2024, the platform has attracted 10,000 users and generated $90M in trading volume.
We are expanding our technical capabilities to support growth, enhance B2B integrations, and develop new automation tools.
As part of our expansion into B2B services, we are focusing on building APIs, SDKs, and white-label solutions that enable seamless integration with third-party platforms.
About the role
We are hiring an experienced Senior Backend Developer to join our team.
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Responsibilities
- Implementing high performance trading platform backend services
- Designing secure and scalable APIs and SDKs
- Investigating performance bottlenecks and unwanted behavior in highly adversarial blockchain setting, online and post-mortem
- Encapsulating security-critical components within TEE enclaves
Requirements
- 6+ years of engineering experience
- Proven experience of developing high performance applications in Rust and/or Golang
- Familiarity with blockchain protocols sufficient to implement precise transaction simulation
- Demonstrable knowledge of EVM and SVM eBPF operational semantics
- Knowledge of basic blockchain cryptography, such as signature schemes, Merkle trees, polynomial commitments
- Understanding of gas- and account abstraction
- Experience with bare-metal software deployments
Nice to have
- Experience in latency-sensitive applications, such as media streaming, online games and (especially) high frequency trading
- Prior exposure to early stage startup environments with high delivery velocity
- Good understanding of DeFi landscape
- Contributions to blockchain and cryptography related open source projects
- Competitive programming experience
Benefits
- Work in a highly professional team. Informal and friendly atmosphere in the team
- Paid vacation — 20 business days per year, 100% sick leave payment
- Equipment provision
- Partially compensated educational costs (for courses, certifications, professional events, etc.)
- Legal and Accounting support in Poland
- Ability to work from our comfortable office in Warsaw at Prosta 51
- 5 sick days per year
- Medical insurance (after the end of the probationary period)
- Flexible working hours – we care about you (!) and your output
- English and Polish classes 2 times a week (online)
- Bright and memorable corporate life: corporate parties, gifts to employees on significant dates
Join us
To be considered for this position, you must have Polish citizenship, a D-type work visa, or a residence permit. Thank you!
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Contribute to our growth
Know someone perfect for this role? Let us know about them. We have a referral program to recognize your support.
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