Backend Developer Java Python

...The role is about:

The Gateway Related Projects team is committed to designing, developing, and implementing payment solutions that guarantee stable and consistent payment processing. Our goal is to create successful products and establish a reputation as a dependable partner for our clients.

In this role, you will work in a fast-paced environment where system performance, scalability, and 99.9% reliability are critical to our core transaction flow.

Location: Cyprus — Onsite (employment contract with relocation support)
Reporting to: Technical LeadWhat you will do:

Dual-Track Engineering: Support and extend the existing Perl-based payment gateway while simultaneously designing and building high-performance microservices in Python.
System Modernization: Architect and implement scalable, distributed Python services to replace legacy components, ensuring reliability under high-load production environments.
High-Stakes Integrations: Integrate and manage complex third-party APIs and external payment services, ensuring seamless transaction flows and robust error handling.
Technical Leadership: Lead code reviews, drive engineering best practices, and identify system bottlenecks to continuously improve performance and scalability.
Architecture & Deployment: Collaborate with DevOps to improve CI/CD pipelines (GitLab) and architect solutions using AWS services (Lambda, ECS, etc.).
Product-Focused Delivery: Go beyond the "how" of the code—bring a product mindset to understand the business logic, user impact, and the "why" behind every feature you build.
Production Ownership: Troubleshoot and resolve complex production issues in distributed systems, maintaining a "zero-downtime" mentality for our merchants.What we need:

Python Mastery: 5+ years of backend engineering experience with deep Python expertise (FastAPI and AsyncIO preferred).
Polyglot Mindset (Perl): Experience with Perl is a major plus, but a genuine eagerness to learn and work within Perl production code …

...Job Title: Blockchain / DLT Developer

Location: Ipswich, London or Remote



As a Blockchain Developer at MACH, you will play a central role in designing, building, and deploying distributed ledger and smart contract solutions for our financial services clients. You will work across Ethereum, Hedera, Algorand, and MACH Chain (our proprietary blockchain platform) to deliver secure, scalable, and high-performance decentralised applications. Collaborating with cross-functional teams including architects, product managers, and client stakeholders, you will bring deep technical expertise and a proactive approach to solving complex on-chain challenges.


Responsibilities include:

Design, develop, and deploy smart contracts and decentralised applications across Ethereum, Hedera, Algorand, and MACH Chain (our proprietary blockchain).

Design and implement blockchain-based solutions tailored to the specific requirements of financial services clients.

Contribute to the ongoing development and enhancement of MACH Chain, including protocol-level improvements and tooling.

Collaborate with backend engineers, solution architects, and product managers to integrate blockchain components with broader platform services and APIs.

Conduct rigorous smart contract auditing, testing, and optimisation to ensure security, correctness, and gas efficiency.

Stay current with emerging developments across Ethereum (EVM/L2), Hedera Hashgraph, Algorand, and the broader DLT ecosystem.

Provide technical guidance and support to junior team members and contribute to internal knowledge sharing.

Engage with project managers, product managers and business analysts to understand requirements, present solutions, and support delivery.

Contribute to the continuous improvement of MACH's development processes, standards, and tooling.



As an experienced Blockchain Developer, you will have:

Experience working specifically with security tokens on distributed ledgers.

Proven hands-on experience …