Remote Backend Developer jobs open to Bulgaria.

LLM systems, Multi-agent systems, Marketing domain literacy, C-suite engagement, Founder mentality

MaxIT Consulting - Max Corporate GroupMaxIT Consulting, part of the Max Corporate Group, is a B2B outsourcing services provider headquartered in Belgrano, CABA, and Tampa, FL, specializing in IT talent acquisition for large companies on a global scale.

Java · Kotlin

5 years of experience, Java/Kotlin, Event-driven architecture, Financially critical systems, Money movement understanding, Cloud-native tooling, Account/wallet systems, Domain-driven design, API design, Production ownership, CI/CD pipelines

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Java · Kotlin

5+ years backend, Java/Kotlin, Spring Boot, Kafka/SQS, wallet or account systems, on-call rota

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Java

Java (ideally 17+), Spring Boot, Kafka or SQS, payments or fintech experience, out-of-hours on-call

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Strong backend engineering, production APIs/cloud/async processing, hands-on AI agent development, some frontend

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Java · Kotlin · Kubernetes

Strong backend, Java or Kotlin, microservices, PostgreSQL, Kafka, Kubernetes, fintech/payments a plus

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Java · Kotlin

7+ years backend, Java/Kotlin, Spring Boot, Kafka, billing/payments/ledger systems

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Java

Java and Spring Boot backend, event-driven microservices, Kafka, real-time systems, employee contract (no B2B)

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.

Go · SQL

7+ years backend, Golang, distributed systems, SQL, based in Europe incl. UK with right to work

Refurbedrefurbed runs an online marketplace for refurbished products, letting customers in 23 European countries buy for less while cutting CO2 emissions.

Rust

5 years of experience, Rust, Distributed systems design, Deep networking, Proxy expertise, Ops and reliability, Cross-platform awareness, Async communication, Curious problem solver

Rust

5 years of experience, Rust, Distributed systems, Deep networking, Proxy expertise, Ops and reliability, Cross-platform awareness, Async communication, Curious problem solver

TypeScript · Go

5+ years backend services in production with on-call, TypeScript or Golang, OAuth/OIDC/JWT, PostgreSQL

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Python

6-7+ years commercial development, Python 3.x, Django, high-load systems, fluent Russian, intermediate+ English

TorreroTorrero provides white-label casino and sportsbook platforms and B2B game aggregation for iGaming operators.

Python

5+ years commercial development, Python 3.x, Django, high-load systems, fluent Russian, intermediate+ English

TorreroTorrero provides white-label casino and sportsbook platforms and B2B game aggregation for iGaming operators.

Python · Go · Kubernetes

5 years of experience, Golang, Python, Kubernetes, AI-assisted coding, Distributed systems

Lemon.ioLemon.io is a Ukraine-based B2B platform connecting startups with vetted freelance developers, offering services globally across various sectors.

Go

Golang or comparable backend language, distributed systems, Kafka, Pub/Sub or SQS messaging

CyberhavenCyberhaven provides an AI-native data security platform for protecting data across human and AI-agent workflows.

Python · SQL · Azure

4 years of experience, Python, FastAPI, Azure, Databricks, REST APIs, SQL Server, Docker, Asynchronous processing, Messaging systems, CI/CD

Mutt DataMuttdata is a data and AI consultancy that builds data platforms and machine learning systems, such as forecasting and recommendation models, for client companies.

Node.js

5+ years backend with Node.js in production, distributed systems, PostgreSQL tuning, observability

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

3+ years Haskell, C, PostgreSQL/plpgsql, open-source contributions, Linux debugging

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Rust · AWS · Kubernetes

Rust, Postgres compatibility, Deterministic Simulation Testing, Formal verification methods, Fuzz testing, Differential testing, AWS, Kubernetes, Embedded databases, Remote team collaboration, Cloud systems observability, Cloud systems reliability, Cloud systems performance

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

TypeScript · Python · Java

Open Source Contributions, Backend Development and API Design, Python, Java, C++, Go, Rust, TypeScript, Debugging and Troubleshooting, Automated Testing and Code Validation, Performance Optimization

Weekday AIWeekday provides AI-assisted candidate sourcing and recruiting services for employers.

JavaScript · Rust · AWS

3 years of experience, PostgreSQL Expert, Nix packaging, Ansible, Docker, AWS, Kubernetes, C/C++ builds, Go, JavaScript, Rust, Infrastructure management, Customer engagement, Proactive problem-solving

SupabaseSupabase is a Postgres development platform providing databases, authentication, storage, APIs and related developer tools.

Python

5 years of experience, Trust & Safety systems, Python, Distributed systems, Cloud applications, End-to-end system ownership, APIs design, Collaboration with non-technical stakeholders, Problem-solving in ambiguous situations

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Python · Go · AWS

6 years of experience, Golang, Python, Event-driven systems, CI/CD tooling, Web application security, SAST/SCA/secret-scanning tooling, AI-assisted engineering, AWS, Kubernetes, Fintech experience, PCI DSS knowledge, Software supply-chain integrity, Policy-as-code familiarity, Threat modeling

SezzleSezzle is a payments platform offering installment plans, credit-building and rewards features to shoppers while connecting merchants to its customer network.

Python · Go · AWS

6 years of experience, Golang, Python, Event-driven systems, CI/CD tooling, Web application security, SAST/SCA/secret-scanning tooling, AI-assisted engineering, AWS, Kubernetes, Fintech experience, PCI DSS knowledge, Software supply-chain integrity, Policy-as-code familiarity, Threat modeling

SezzleSezzle is a payments platform offering installment plans, credit-building and rewards features to shoppers while connecting merchants to its customer network.

Python · Kubernetes

Python, Backend development, Software design patterns, Cloud infrastructure, Test design, Security fundamentals, Authentication/authorization experience, Kubernetes, Internal platform development

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Rust

Rust, Backend engineering, System reliability, Scalable systems, UI systems design, Data pipelines, Project leadership, Professional editing tools

ElevenLabsElevenLabs builds AI voice, conversational-agent, creative-media, and developer API products.

Rust

3+ years software engineering, Rust network/async services, modern C++, low-latency trading systems

KrakenKraken is a financial platform where individuals and institutions trade crypto, stocks, ETFs, and futures.