Backend Developer Jobs in Sofia

Backend Developer jobs in Sofia hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $78,295/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.

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Zühlke

zuehlke.com
zuehlke.com • HQ: Schlieren, Switzerland • Engineering Services • Custom Software Development • IT Consulting & Digital Transformation • 1001-5000 employees • Est. 1968 • Trust A • Hiring 36, 1 new
HQ: Schlieren, Switzerland • Engineering Services • Custom Software Development • IT Consulting & Digital Transformation • 1001-5000 employees • Est. 1968 • Trust A • Hiring 36, 1 new
Zuhlke is a Swiss engineering and innovation company founded in 1968 and based near Zurich. It develops software, medical devices and industrial products for clients from concept through to production. The employee-owned group operates across Europe and Asia with around two thousand specialists.
Mariana Salva · CEO · decision-maker
Nhan Quy Tran · CEO · decision-maker
Angela Bishop · CEO · decision-maker
Stefan Sarbach · CEO · decision-maker
Careers mailbox is known
4 hours ago Hiring now · 86%

Software Engineer, Managed Services

Hybrid (Sofia, Bulgaria)
Node JS
C#
TypeScript
Java
SQL
Python
JavaScript
Java
Spring Data JPA
Spring Security
Spring Boot
C#
.NET
Databases
Oracle
PostgreSQL
AI/ML
Cursor
Claude
Copilot
LLM
Frontend
Vue.js
Angular
React.js
Mobile
Dependency Injection
DevOps
Helm
Istio
Azure AKS
SLI/SLO/SLA
GitHub Actions
Jenkins
Terraform
Kubernetes
CI/CD
Azure
+23
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Verified live · 1 day ago 11 days ago Hiring now · 89%

Fullstack Java & React Engineer

In office (Sofia, Bulgaria) • Full-Time • English
TypeScript
Java
JavaScript
Java
Spring Boot
Frontend
Next.js
React.js
Mobile
Clean Architecture
DevOps
Rest API
CI/CD
+1
Apply

SupportYourApp

supportyourapp.com
supportyourapp.com • HQ: Kyiv, Ukraine • IT Help Desk & Service Desk • Call Center Services • Est. 2010 • Trust A • Hiring 58, 40 new
HQ: Kyiv, Ukraine • IT Help Desk & Service Desk • Call Center Services • Est. 2010 • Trust A • Hiring 58, 40 new
SupportYourApp is a customer support outsourcing company that provides multilingual, round-the-clock customer service, technical support and help desk teams, mainly for technology startups, SaaS providers and larger software companies. Founded in 2010, it runs support and engineering staff in Ukraine and across Europe, including Kyiv, Lviv, Sarajevo and Sofia, and is registered in the United States. The company is headquartered in Kyiv, Ukraine.
No named decision-maker yet.
Careers mailbox is known
Verified live · 3 hours ago 7 hours ago Hiring now · 86%

(fluent English) Senior Full-Stack Developer (Python/Django/React)

≈ $38k – $105k per year (Estimated) • Senior • Sofia • Sarajevo • Tuzla • Plovdiv • Remote (United Arab Emirates, Bulgaria, UTC+4 hours) • Contractor • Senior • English: B2
TypeScript
Python
Python
Django
Celery
Databases
PostgreSQL
AI/ML
AWS Bedrock
Model Context Protocol
AI Agents
DevOps
Bitbucket
Amazon ECS
Jenkins
Terraform
AWS
Management
Jira
QA
Playwright
+7
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Commerzbank

commerzbank.com
commerzbank.com • HQ: Frankfurt am Main, Germany • Investment Banking & M&A Advisory • Commercial & Retail Banks • Wealth Management & Financial Advisors • 5000+ employees • Est. 1870 • Trust A • Hiring 388, 21 new
HQ: Frankfurt am Main, Germany • Investment Banking & M&A Advisory • Commercial & Retail Banks • Wealth Management & Financial Advisors • 5000+ employees • Est. 1870 • Trust A • Hiring 388, 21 new
Commerzbank is a German universal bank headquartered in Frankfurt am Main, serving private and small-business customers, wealth management clients, corporate clients and financial institutions. Founded in Hamburg in 1870 and listed on the Frankfurt Stock Exchange, the group includes the online bank comdirect and the Polish subsidiary mBank, and runs technology and service centres in Sofia, Prague and Malaysia alongside its German branch network. It hires client advisers, apprentices, dual-study students, interns and trainees in Germany, plus application operations, cloud platform and Azure engineers, credit analysts and risk and governance specialists.
Bettina Orlopp · Managing Directors · decision-maker
Careers mailbox is known
Verified live · 2 hours ago 7 hours ago Hiring now · 86%

Senior Full-Stack Developer (Accounts and Deposits) (m/f/diverse)

≈ $41k – $78k per year (Estimated) • Senior • Hybrid (Sofia, Bulgaria) • Bachelor's Degree • Senior
TypeScript
JavaScript
Java
Java
Spring Boot
Databases
Apache Kafka
Frontend
React.js
DevOps
OpenShift
Helm
Terraform
Rest API
Docker
Kubernetes
CI/CD
Management
Scrum
Agile
+7
Apply
Verified live · 2 hours ago 15 days ago Hiring now · 88%

FullStack Software Engineer (m/f/diverse)

Hybrid (Sofia, Bulgaria)
JavaScript
Databases
Apache Kafka
PostgreSQL
Frontend
React.js
Management
Scrum
Apply
Verified live · 2 hours ago 18 days ago Hiring now · 88%

Application Operations Engineer (Kafka) (m/f/diverse)

Hybrid (Sofia, Bulgaria) • Bachelor's Degree
Apache Kafka
DevOps
OpenShift
Dynatrace
Linux
Kubernetes
Management
ServiceNow
Confluence
Apply

Tieto

tieto.com
tieto.com • HQ: Espoo, Finland • EHR & Clinical Software • Managed IT Services (MSP) • IT Outsourcing & Dedicated Teams • IT Consulting & Digital Transformation • Financial Software & Embedded Finance • 5000+ employees • Est. 1968 • IT services • Trust B • Hiring 302, 71 new
HQ: Espoo, Finland • EHR & Clinical Software • Managed IT Services (MSP) • IT Outsourcing & Dedicated Teams • IT Consulting & Digital Transformation • Financial Software & Embedded Finance • 5000+ employees • Est. 1968 • IT services • Trust B • Hiring 302, 71 new
Tieto is a Nordic software and IT services company, known as Tietoevry from the 2019 merger of the Finnish Tieto, founded in 1968, with the Norwegian company EVRY until it returned to the Tieto name. It supplies banking and payments software, public sector and healthcare systems, industry software and cloud and infrastructure services through units such as Tieto Banktech, Tieto Indtech and Tieto Tech Consulting, for clients across Finland, Norway, Sweden and other countries. Listed in Helsinki and Stockholm, the company is headquartered in Espoo, Finland.
Kimmo Pentikainen · Chief Executive Officer · decision-maker
Kimmo Alkio · Former Chief Executive Officer
Careers mailbox is known
Verified live · 2 hours ago 10 hours ago Hiring now · 86%

Senior Full-Stack Software Engineer (Java/Typescript/Python) - Tieto Tech Consulting (m/f/d)

≈ $41k – $77k per year (Estimated) • Senior • 5+ years exp • Hybrid (Sofia, Bulgaria) • Full-Time • Senior • English
TypeScript
Java
SQL
Python
DevOps
GitHub Actions
CI/CD
AWS
Cybersecurity
Keycloak
Apply
Verified live · 2 hours ago 1 month ago Fading · 31%

Senior Java Developer - Tieto Tech Consulting (m/f/d)

≈ $41k – $77k per year (Estimated) • Senior • 5+ years exp • In office (Sofia, Bulgaria) • Full-Time • Senior • English
Node JS
TypeScript
Java
JavaScript
Databases
Apache Kafka
DevOps
Rest API
Kubernetes
AWS
Apply
Open 120 daysVerified live · 2 hours ago 4 months ago Long shot · 9%

Senior Full Stack Engineer (React, Node & Nest) - Tieto Tech Consulting (m/f/d)

≈ $41k – $78k per year (Estimated) • Senior • 5+ years exp • In office (Sofia, Bulgaria) • Full-Time • Senior • English: C1
Node JS
TypeScript
JavaScript
Node JS
Nest.JS
Databases
Apache Kafka
AI/ML
AI Agents
Frontend
Tailwind CSS
Material UI
styled-components
Emotion
React.js
DevOps
GitHub Actions
Git
CI/CD
Design
Figma
Management
Agile
QA
Cypress
Playwright
Jest
Vitest
+12
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Банка ДСК

dskbank.bg
dskbank.bg • HQ: Sofia, Bulgaria • Hiring 34, 6 new
HQ: Sofia, Bulgaria • Hiring 34, 6 new
Банка ДСК предлага пакет от банкови услуги и продукти, включително индивидуално банкиране, премиум и корпоративно банкиране, дебитни и кредитни карти.
No named decision-maker yet.
Careers mailbox is known
1 day ago Hiring now · 90%

Mid/Senior Software Engineer (.Net), Sofia

≈ $40k – $76k per year (Estimated) • Senior • In office (Sofia, Bulgaria) • Full-Time • Senior
C#
C#
.NET
Databases
MS SQL
PostgreSQL
DevOps
Rest API
Docker
CI/CD
Apply
1 day ago Hiring now · 90%

Mid/ Sr .Net Backend Developer

≈ $40k – $76k per year (Estimated) • Senior • In office (Sofia, Bulgaria) • Senior
C#
C#
.NET
Databases
MS SQL
PostgreSQL
DevOps
Rest API
Docker
CI/CD
Apply
≈ $41k – $77k per year (Estimated) • Senior • 3+ years exp • In office (Sofia, Bulgaria) • Senior
Java
Java
Hibernate
Spring Boot
Mobile
JUnit
DevOps
OpenShift
Kubernetes
CI/CD
Cybersecurity
Keycloak
Apply

Schwarz Digits

schwarz-digits.de
schwarz-digits.de • HQ: Neckarsulm, Germany • Information Security • Cloud Platforms (IaaS & PaaS) • 1001-5000 employees • Est. 2023 • Hiring 360, 10 new
HQ: Neckarsulm, Germany • Information Security • Cloud Platforms (IaaS & PaaS) • 1001-5000 employees • Est. 2023 • Hiring 360, 10 new
Schwarz Digits is the digital division of the Schwarz Group, formed in 2023 to bring together its technology businesses. It combines the STACKIT cloud, the XM Cyber security company and the group's data and software teams. The unit has become one of the largest technology employers in Germany outside the classic software sector.
No named decision-maker yet.
No careers mailbox known
Hybrid (Sofia, Bulgaria)
Go
Python
Databases
PostgreSQL
DevOps
gRPC
IAM
Terraform
Rest API
Kubernetes
CI/CD
+1
Apply
Hybrid (Sofia, Bulgaria)
Kotlin
Java
TypeScript
JavaScript
Databases
PostgreSQL
Frontend
Vue.js
Angular
React.js
DevOps
Docker
Kubernetes
+2
Apply
Junior • Hybrid (Sofia, Bulgaria) • Internship • Junior
Go
DevOps
Rest API
Git
Docker
Linux
Kubernetes
Apply

ETAP

etap.com
etap.com • HQ: Irvine, United States • Power Grid • CAD, PLM & BIM Software • Simulation & Digital Twin Software • Est. 1986 • Trust B • Hiring 65, 7 new
HQ: Irvine, United States • Power Grid • CAD, PLM & BIM Software • Simulation & Digital Twin Software • Est. 1986 • Trust B • Hiring 65, 7 new
ETAP is an electrical engineering software company headquartered in Irvine, California, and was founded in 1986. The company develops an integrated electrical digital twin platform for the design, simulation, operation, and automation of generation, transmission, distribution, and industrial power systems. Operating as an independent subsidiary of Schneider Electric, the firm provides its solutions to utilities, data centers, and industrial facilities through a global network of offices and partners.
No named decision-maker yet.
Careers mailbox is known
Verified live · 1 day ago 2 days ago Hiring now · 90%

Full Stack Software Developer

In office (Sofia, Bulgaria) • Bachelor's Degree • Full-Time • English: B2
C#
SQL
C#
Entity Framework Core
.NET
Robotics
Digital Twin
Management
Agile
Energy
ETAP
Apply

Groupama Bulgaria

groupama.bg
groupama.bg • HQ: Sofia, Bulgaria • Life Insurance & Annuities • Property & Casualty Insurance • 5000+ employees • Est. 2017 • Hiring 4, 3 new
HQ: Sofia, Bulgaria • Life Insurance & Annuities • Property & Casualty Insurance • 5000+ employees • Est. 2017 • Hiring 4, 3 new
Groupama Bulgaria is the Bulgarian insurance business of the international Groupama group, made up of a general insurance company and a life insurance company. It offers insurance for almost every aspect of life, with online premium calculators, and hires backend and API developers. The company is headquartered in Sofia, Bulgaria.
No named decision-maker yet.
Careers mailbox is known
2 days ago Hiring now · 90%

Lead Software Architect

≈ $32k – $96k per year (Estimated) • Lead • Hybrid (Sofia, Bulgaria) • Staff
C#
Python
C#
.NET
DevOps
CI/CD
Design
Figma
Management
UML
Agile
Apply

Braver IT

braverit.com
braverit.com • HQ: Kraków, Poland • IT Outsourcing & Dedicated Teams • Custom Software Development • Hiring 17, 5 new
HQ: Kraków, Poland • IT Outsourcing & Dedicated Teams • Custom Software Development • Hiring 17, 5 new
Braver IT is a Polish software engineering company that builds AI-powered and real-time backend systems, including AdTech and real-time bidding products. It hires senior and lead Node.js, Python and Go engineers and staff backend engineers in Kraków, Katowice, Warsaw and Rzeszów. The company is based in Poland.
No named decision-maker yet.
No careers mailbox known
$72k – $102k per year • Kraków • Warsaw • Gdańsk • Sofia • Remote (Poland) • Contractor
Node JS
TypeScript
JavaScript
Frontend
React.js
DevOps
CI/CD
Apply

Excelsior Works

exwo.com
exwo.com • Sofia • Digital Goods • Media & Entertainment • Hiring 3, 3 new
Sofia • Digital Goods • Media & Entertainment • Hiring 3, 3 new
Excelsior Works is a technology-driven entertainment company building digital products from Sofia for a global audience. See open roles and apply in minutes — no account, no endless logins.
No named decision-maker yet.
No careers mailbox known
3 days ago Hiring now · 90%

Senior Backend Engineer (.NET)

≈ $40k – $76k per year (Estimated) • Senior • Hybrid (Sofia, Bulgaria) • Senior
C#
SQL
C#
ASP.NET Core
DevOps
GitHub
Rest API
Docker
CI/CD
Apply

Avenga

avenga.com
avenga.com • HQ: Prague, Czech Republic • IT Outsourcing & Dedicated Teams • Custom Software Development • IT Consulting & Digital Transformation • 5000+ employees • Est. 2019 • Trust B • Hiring 116, 18 new
HQ: Prague, Czech Republic • IT Outsourcing & Dedicated Teams • Custom Software Development • IT Consulting & Digital Transformation • 5000+ employees • Est. 2019 • Trust B • Hiring 116, 18 new
Avenga is a global IT engineering and technology consultancy specializing in custom software development and enterprise digital transformation. Headquartered in Prague, Czech Republic, the company operates across key service areas including custom software engineering, AI and data solutions, cloud platform engineering, managed IT operations, and experience design (CX/UX).
No named decision-maker yet.
Careers mailbox is known
Verified live · 2 hours ago 3 days ago Likely open · 63%

Node.js Engineer

Middle • 3+ years exp • In office (Sofia, Bulgaria) • Full-Time • Middle • English: B2
Node JS
TypeScript
JavaScript
Node JS
Nest.JS
Express
Fastify
Prisma
Mongoose
Sequelize
TypeORM
Databases
MySQL
PostgreSQL
RabbitMQ
Apache Kafka
Frontend
GraphQL
Mobile
Clean Architecture
DevOps
Rest API
Git
Docker
CI/CD
WebSockets
GCP
Kubernetes
Azure
AWS
Management
Scrum
Agile
+19
Apply
Verified live · 2 hours ago 3 days ago Likely open · 63%

Senior Python Engineer

≈ $45k – $85k per year (Estimated) • Senior • 5+ years exp • Hybrid (Sofia, Bulgaria) • Full-Time • Senior • English: B2
Python
Python
Flask
SQLAlchemy
FastAPI
Django
Celery
Databases
Redis
MySQL
PostgreSQL
RabbitMQ
Apache Kafka
AI/ML
Pandas
NumPy
Frontend
GraphQL
Mobile
Clean Architecture
DevOps
Git
Docker
GCP
Azure
CI/CD
AWS
Datadog
WebSockets
Prometheus
Grafana
Terraform
Kubernetes
Management
Scrum
Agile
QA
Pytest
+22
Apply
Verified live · 2 hours ago 15 days ago Fading · 38%

Senior Java Engineer

≈ $45k – $85k per year (Estimated) • Senior • In office (Sofia, Bulgaria) • Full-Time • Senior • English: B2
Java
SQL
Python
Java
Maven
Gradle
Databases
Oracle
DevOps
SOAP
Rest API
AWS
+1
Apply

ITF Group

itfgroup.com
itfgroup.com • Sofia • Hazelwood • Freight Forwarding • Logistics • Transportation & Logistics • Est. 2012 • Hiring 1, 1 new
Sofia • Hazelwood • Freight Forwarding • Logistics • Transportation & Logistics • Est. 2012 • Hiring 1, 1 new
Looking for a logistics company in St. Louis? Discover ITF Group’s trucking, 3PL, warehousing, LTL, and freight forwarding solutions nationwide.
No named decision-maker yet.
Careers mailbox is known
3 days ago Hiring now · 86%

Senior Software Engineer

≈ $41k – $78k per year (Estimated) • Senior • Hybrid (Sofia, Bulgaria) • Senior
TypeScript
JavaScript
Node JS
Node JS
Nest.JS
Databases
Apache Kafka
Frontend
Angular
React.js
Mobile
React Native
Cordova
DevOps
WebSockets
AWS
Apache HTTP Server
+4
Apply
Report

Palo Alto Networks

paloaltonetworks.com
paloaltonetworks.com • HQ: Santa Clara, United States • Endpoint Security • Threat Intelligence • Security Operations • Cloud Security • Network Security • 1001-5000 employees • Est. 2005 • Trust B • Hiring 1120, 69 new
HQ: Santa Clara, United States • Endpoint Security • Threat Intelligence • Security Operations • Cloud Security • Network Security • 1001-5000 employees • Est. 2005 • Trust B • Hiring 1120, 69 new
Palo Alto Networks is a cybersecurity company headquartered in Santa Clara, California, selling next-generation firewalls and SASE network security, the Prisma and Cortex platforms for cloud security and security operations, and Unit 42 threat intelligence and incident response services. Founded in 2005 by Nir Zuk and listed on Nasdaq, it reports more than 16,000 employees and over 70,000 customers, with major engineering centres in Israel and India and offices across the Americas, Europe and Asia. It hires software engineers, product managers and designers, solutions consultants, account managers, go-to-market strategists and legal and sourcing staff.
No named decision-maker yet.
Careers mailbox is known
Verified live · 2 days ago 3 days ago Likely open · 63%

Senior Software Engineer - Secure AI Agent (Hybrid)

≈ $52k – $99k per year (Estimated) • Senior • 5+ years exp • Hybrid (Sofia, Bulgaria) • Full-Time • Confidential • Senior
Go
Python
AI/ML
AI Agents
Cybersecurity
Least Privilege
Zero Trust
Apply
Verified live · 2 days ago 3 days ago Likely open · 63%

Principal Software Engineer - Secure AI Agent (Hybrid)

≈ $41k – $122k per year (Estimated) • Lead • 8+ years exp • Hybrid (Sofia, Bulgaria) • Full-Time • Confidential • Principal
AI Agents
DevOps
GCP
Azure
AWS
Apply
Verified live · 2 days ago 18 days ago Likely open · 57%

Principal Software Engineer - Credential Provider

Lead • 10+ years exp • Hybrid (Sofia, Bulgaria) • Bachelor's Degree • Full-Time • Confidential • Principal
Go
C#
C++
Java
Python
DevOps
Windows
Linux
IAM
CI/CD
AWS
+2
Apply

iTeamly

iteamly.com
iteamly.com • HQ: Warsaw, Poland • IT Outsourcing & Dedicated Teams • Est. 2021 • Likely startup • Hiring 20, 5 new
HQ: Warsaw, Poland • IT Outsourcing & Dedicated Teams • Est. 2021 • Likely startup • Hiring 20, 5 new
About us iTeamly is an IT partner supporting companies in building, scaling, and improving digital products. We combine technology expertise with strong delivery and recruitment capabilities, helping clients access the right people and skills faster.
No named decision-maker yet.
Careers mailbox is known
4 days ago Hiring now · 90%

Fullstack Mid Java/React Developer

$38k – $66k per year • Kraków • Katowice • Sofia • Remote (Poland) • Contractor
TypeScript
Java
JavaScript
SQL
Java
Spring Boot
Databases
MySQL
AI/ML
Hadoop
Spark
Frontend
React.js
Webpack
Vite
Mobile
JUnit
DevOps
WebSockets
Rest API
Git
Docker
CI/CD
CloudFormation
Prometheus
Terraform
Kubernetes
AWS
Management
Confluence
Jira
Scrum
Agile
QA
Cypress
+19
Apply
14 days ago Hiring now · 71%

Staff Software Engineer — Node.js, React & AI

$57k – $93k per year • Staff+ • Kraków • Sofia • Madrid • Gdańsk • Remote (likely Poland) • Contractor • Staff
Node JS
TypeScript
JavaScript
AI/ML
Cursor
Claude Code
Copilot
AI Agents
Frontend
Next.js
React.js
+1
Apply

Cognyte

cognyte.com
cognyte.com • HQ: Herzliya, Israel • Threat Intelligence • Law Enforcement • Intelligence • 51-200 employees • Est. 2021 • Hiring 8, 3 new
HQ: Herzliya, Israel • Threat Intelligence • Law Enforcement • Intelligence • 51-200 employees • Est. 2021 • Hiring 8, 3 new
Cognyte is an Israeli investigative analytics company spun out of Verint to focus on security intelligence. Its software fuses communications, open source and operational data to support law enforcement and national security investigations. The company is listed on Nasdaq and works with agencies in many countries.
No named decision-maker yet.
Careers mailbox is known
4 days ago Hiring now · 90%

Senior Back-end Engineer

≈ $41k – $78k per year (Estimated) • Senior • Hybrid (Sofia, Bulgaria) • Senior
Java
Java
Spring Framework
Databases
RabbitMQ
ElasticSearch
MySQL
Apache Kafka
PostgreSQL
DevOps
Docker
GCP
Kubernetes
Azure
AWS
Management
Scrum
+5
Apply

Hypoport Sofia

hypoport.bg
hypoport.bg • HQ: Sofia, Bulgaria • Financial Software & Embedded Finance • InsurTech • PropTech • 1001-5000 employees • Hiring 46, 2 new
HQ: Sofia, Bulgaria • Financial Software & Embedded Finance • InsurTech • PropTech • 1001-5000 employees • Hiring 46, 2 new
Hypoport Sofia is the Bulgarian software development hub of the Hypoport Group, the Berlin-based listed network of technology companies for the credit, real estate and insurance industries, and is based in Sofia. It grew out of the Sofia office that FIO Systems opened in 2002, joined the group when FIO became part of Hypoport in 2018, and now builds and supports development teams for Hypoport entities across recruitment, workplace services and IT support. It hires .NET and C# developers, fullstack and data engineers and IT support staff, while the linked group job board also lists sales, real estate valuation and insurance roles across Germany.
No named decision-maker yet.
Careers mailbox is known
Verified live · 1 hour ago 4 days ago Hiring now · 90%

Intermediate Full-Stack Developer

Middle • 3+ years exp • In office (Sofia, Bulgaria) • Full-Time • Middle • English
C#
TypeScript
JavaScript
SQL
C#
ASP.NET Core
Databases
MS SQL
Frontend
React.js
DevOps
Rest API
Docker
Kubernetes
CI/CD
Design
Figma
+4
Apply
Verified live · 1 hour ago 25 days ago Fading · 34%

Junior .NET Developer

Junior • In office (Sofia, Bulgaria) • Full-Time • Junior • English
C#
JavaScript
SQL
C#
ASP.NET Core
Databases
MS SQL
Apply

Infinite Lambda

infinitelambda.com
infinitelambda.com • HQ: London, United Kingdom • Engineering Services • Science & Engineering • 51-200 employees • Est. 2019 • Hiring 8, 4 new
HQ: London, United Kingdom • Engineering Services • Science & Engineering • 51-200 employees • Est. 2019 • Hiring 8, 4 new
Infinite Lambda is a data and AI engineering consultancy. We empower organisations to fully transform through cutting-edge tech and practices on the cloud.
No named decision-maker yet.
No careers mailbox known
Verified live · 1 hour ago 5 days ago Hiring now · 86%

Sofia-based I Senior Product Engineer

$47k – $83k per year • Senior • 5+ years exp • Hybrid (Sofia, Bulgaria) • PhD • Full-Time • Senior • English
Go
Java
Python
Databases
Snowflake
AI/ML
dbt
Cursor
Claude Code
AI Agents
DevOps
AWS Lambda
AWS
Analytics
Informatica
Talend
SSIS
Fivetran
ETL/ELT
+7
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emerchantpay

emerchantpay.com
emerchantpay.com • HQ: London, United Kingdom • Payment Processing & Gateways • 201-500 employees • Est. 2001 • Trust D • Hiring 14
HQ: London, United Kingdom • Payment Processing & Gateways • 201-500 employees • Est. 2001 • Trust D • Hiring 14
emerchantpay is a London payments company founded in 2001 that provides global acquiring and a gateway for online and in-store merchants. Its platform supports cards and a wide range of alternative payment methods with fraud and chargeback management built in. The company works with retail, travel and digital goods businesses trading internationally.
No named decision-maker yet.
No careers mailbox known
Verified live · 1 hour ago 7 days ago Likely open · 60%

Senior Java Developer

≈ $45k – $85k per year (Estimated) • Senior • Sofia • Remote (Bulgaria) • Full-Time • Senior
JavaScript
Java
Java
Hibernate
Databases
MySQL
PostgreSQL
AI/ML
AWS Bedrock
LLM Guardrails
Cursor
Model Context Protocol
Claude Code
Claude
Copilot
AI Agents
Mobile
JUnit
DevOps
Ansible
GitHub
Terraform
Linux
AWS
Cybersecurity
PCI DSS
Cryptography
OpenSSL
Management
Confluence
Jira
+15
Apply
Likely inactiveVerified live · 1 hour ago 1 year ago Long shot · 5%

Senior Ruby/Rails Back-End Developer

≈ $46k – $86k per year (Estimated) • Senior • Sofia • Remote (Bulgaria) • Full-Time • Senior • English: C1
Ruby
JavaScript
Ruby
Ruby on Rails
RSpec
Databases
RabbitMQ
Redis
MySQL
PostgreSQL
Frontend
Redux
GraphQL
React.js
DevOps
Ansible
Terraform
Docker
AWS
+7
Apply
Likely inactiveVerified live · 1 hour ago 1 year ago Long shot · 5%

Senior Developer with Golang

≈ $47k – $88k per year (Estimated) • Senior • Sofia • Remote (Bulgaria) • Full-Time • Senior
Ruby
Go
JavaScript
TypeScript
Go
Ginkgo
Ruby
Ruby on Rails
Databases
RabbitMQ
Redis
Frontend
Angular
React.js
DevOps
Puppet
Chef
Ansible
Git
Linux
AWS
Cryptography
OpenSSL
+9
Apply

DeepInfra

deepinfra.com
deepinfra.com • HQ: Palo Alto, United States • AI Compute & Inference • 501-1000 employees • Est. 2022 • Startup • Trust A • Hiring 17
HQ: Palo Alto, United States • AI Compute & Inference • 501-1000 employees • Est. 2022 • Startup • Trust A • Hiring 17
DeepInfra is a company founded in 2022 that runs a low-cost inference cloud for open machine learning models. Developers call hosted language, embedding, speech and image models through a simple interface and pay per token or per second without managing graphics hardware. Its focus on cheap serving of open-weight models made it popular with startups building on Llama, Mistral and Qwen.
Georgios Papoutsis · Executive Officer, Director · decision-maker
Yessenzhar Kanapin · Executive Officer, Director · decision-maker
Nikola Borisov · Executive Officer, Director · decision-maker
No careers mailbox known
Verified live · 2 hours ago 7 days ago Likely open · 60%

Software Engineer - Bulgaria, Early Career

$34k – $61k per year • Equity • Junior • In office (Sofia, Bulgaria) • Bachelor's Degree • Full-Time • Junior
C++
Python
C++
TensorFlow C++
AI/ML
SciPy
Multimodal AI
Diffusers
Transformers
NumPy
CUDA
NCCL
TensorFlow
PyTorch
DevOps
Git
+5
Apply
Verified live · 2 hours ago 1 month ago Fading · 26%

Software Engineer (Sofia, Bulgaria)

$67k – $101k per year • Equity • Middle • 3+ years exp • In office (Sofia, Bulgaria) • Bachelor's Degree • Full-Time • Middle
C++
Python
C++
TensorFlow C++
AI/ML
Diffusers
Transformers
CUDA
NCCL
TensorFlow
PyTorch
Multimodal AI
DevOps
Git
+3
Apply

flatexDEGIRO

flatexdegiro.com
flatexdegiro.com • HQ: Frankfurt am Main, Germany • Online Brokerage & Trading Platforms • 501-1000 employees • Hiring 26, 1 new
HQ: Frankfurt am Main, Germany • Online Brokerage & Trading Platforms • 501-1000 employees • Hiring 26, 1 new
FlatexDEGIRO is a European online broker and trading platform for retail investors. It hires test automation engineers, database administrators, IT security project managers, KYC analysts and SEO analysts in Amsterdam, Neuss, Sofia and Frankfurt. The company is headquartered in Frankfurt am Main, Germany.
No named decision-maker yet.
No careers mailbox known
7 days ago Hiring now · 90%

Senior C++ Developer

≈ $42k – $80k per year (Estimated) • Senior • 4+ years exp • Hybrid (Sofia, Bulgaria) • Bachelor's Degree • Senior • English: C1
Python
C++
Databases
Redis
Apache Kafka
DevOps
GitLab
Jenkins
Docker
Kubernetes
CI/CD
+1
Apply
Machines can read this selection · checked 20:50 UTC
Backend Developer Jobs in Sofia
Frequently asked questions
How many Backend Developer jobs in Sofia are available on Alion?
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What salary do Backend Developer jobs in Sofia pay?
The average salary is around $78,295 per year based on the current listings.
Are remote options available for Backend Developer jobs in Sofia?
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